import asyncio
from collections import deque
import json
import logging
import logging.handlers
import os
import random
import re
import secrets
import sys
import time
import uuid
from datetime import datetime
from pathlib import Path

import resend
from fastapi import FastAPI, HTTPException, Request
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel, EmailStr


# ── Logging ──────────────────────────────────────────────────────────────────

def _setup_logging() -> logging.Logger:
    log_dir = Path(os.environ.get("LOG_DIR", "logs"))
    log_dir.mkdir(parents=True, exist_ok=True)
    log_file = log_dir / "mail-api.log"

    fmt = logging.Formatter(
        "%(asctime)s %(levelname)-8s %(name)s: %(message)s",
        datefmt="%d/%m/%Y %H:%M:%S %Z",
    )

    root = logging.getLogger()
    root.setLevel(logging.DEBUG)
    for handler in list(root.handlers):
        root.removeHandler(handler)

    console = logging.StreamHandler(sys.stdout)
    console.setLevel(logging.INFO)
    console.setFormatter(fmt)
    root.addHandler(console)

    rotating = logging.handlers.RotatingFileHandler(
        log_file, maxBytes=2_000_000, backupCount=5, encoding="utf-8"
    )
    rotating.setLevel(logging.DEBUG)
    rotating.setFormatter(fmt)
    root.addHandler(rotating)

    log = logging.getLogger("mail-api")
    log.info("Logging initialised → console=INFO, file=%s (DEBUG, rotating)", log_file)
    return log


logger = _setup_logging()


# ── Configuration ────────────────────────────────────────────────────────────

DEV_MODE = os.environ.get("DEV_MODE", "").strip().lower() in {"1", "true", "yes"}

REQUIRED_ENV = {
    "RESEND_API_KEY": "API key from https://resend.com/api-keys",
    "OWNER_EMAIL": "Email address that receives new lead notifications",
}


def _load_config() -> dict:
    if DEV_MODE:
        return {
            "resend_api_key": os.environ.get("RESEND_API_KEY", "dev"),
            "owner_email": os.environ.get("OWNER_EMAIL", "dev@localhost"),
            "from_email": os.environ.get("FROM_EMAIL", "GoodWalk <bookings@goodwalk.co.nz>"),
            "reply_to": os.environ.get("REPLY_TO", "aless@goodwalk.co.nz"),
            "owner_bcc": "",
            "client_bcc": "",
            "enable_general_enquiries": False,
            "max_attempts": 3,
            "form_min_seconds": 1,
            "form_max_seconds": 7200,
            "rate_limit_window_seconds": 900,
            "rate_limit_max_per_ip": 50,
            "rate_limit_max_per_email": 50,
            "rate_limit_min_interval_seconds": 1,
        }
    missing = [(name, hint) for name, hint in REQUIRED_ENV.items() if not os.environ.get(name)]
    if missing:
        lines = [
            "",
            "Mail API cannot start — required environment variables are not set:",
            "",
        ]
        for name, hint in missing:
            lines.append(f"  • {name}  ({hint})")
        lines += [
            "",
            "Set them in your shell and try again. For example, in PowerShell:",
            "",
        ]
        for name, _ in missing:
            lines.append(f'  $env:{name} = "..."')
        lines.append("")
        message = "\n".join(lines)
        logger.critical("Startup aborted: missing env vars: %s", [n for n, _ in missing])
        print(message, file=sys.stderr)
        sys.exit(1)

    return {
        "resend_api_key": os.environ["RESEND_API_KEY"],
        "owner_email": os.environ["OWNER_EMAIL"],
        "from_email": os.environ.get("FROM_EMAIL", "GoodWalk <bookings@goodwalk.co.nz>"),
        "reply_to": os.environ.get("REPLY_TO", "aless@goodwalk.co.nz"),
        "owner_bcc": os.environ.get("OWNER_BCC", "example@example.com").strip(),
        "client_bcc": os.environ.get("CLIENT_BCC", "").strip(),
        "enable_general_enquiries": os.environ.get("ENABLE_GENERAL_ENQUIRIES", "false").strip().lower() in {"1", "true", "yes", "on", "enabled"},
        "max_attempts": max(1, int(os.environ.get("MAIL_MAX_ATTEMPTS", "3"))),
        "form_min_seconds": max(1, int(os.environ.get("FORM_MIN_SECONDS", "4"))),
        "form_max_seconds": max(60, int(os.environ.get("FORM_MAX_SECONDS", "7200"))),
        "rate_limit_window_seconds": max(60, int(os.environ.get("RATE_LIMIT_WINDOW_SECONDS", "900"))),
        "rate_limit_max_per_ip": max(1, int(os.environ.get("RATE_LIMIT_MAX_PER_IP", "5"))),
        "rate_limit_max_per_email": max(1, int(os.environ.get("RATE_LIMIT_MAX_PER_EMAIL", "3"))),
        "rate_limit_min_interval_seconds": max(1, int(os.environ.get("RATE_LIMIT_MIN_INTERVAL_SECONDS", "20"))),
    }


_config = _load_config()
APP_VERSION = os.environ.get("APP_VERSION", "unknown")
AUTH_CODE_TTL_SECONDS = max(60, int(os.environ.get("AUTH_CODE_TTL_SECONDS", "600")))
AUTH_SESSION_TTL_SECONDS = max(3600, int(os.environ.get("AUTH_SESSION_TTL_SECONDS", str(7 * 24 * 3600))))
AUTH_CODE_MAX_ATTEMPTS = 5
AUTH_CODE_REQUESTS_PER_HOUR = 5
AUTH_IP_MAX_FAILURES = max(3, int(os.environ.get("AUTH_IP_MAX_FAILURES", "10")))
AUTH_IP_FAILURE_WINDOW = max(60, int(os.environ.get("AUTH_IP_FAILURE_WINDOW", "600")))
AUTH_IP_BLOCK_DURATION = max(60, int(os.environ.get("AUTH_IP_BLOCK_DURATION", "3600")))
_ALLOWED_EMAILS_FILE = Path(os.environ.get("DATA_DIR", "data")) / "allowed_emails.json"
_CLIENT_PROFILES_FILE = Path(os.environ.get("DATA_DIR", "data")) / "client_profiles.json"
_DRAFTS_FILE = Path(os.environ.get("DATA_DIR", "data")) / "drafts.json"
resend.api_key = _config["resend_api_key"]
OWNER_EMAIL = _config["owner_email"]
OWNER_BCC = _config["owner_bcc"]
CLIENT_BCC = _config["client_bcc"]
FROM_EMAIL = _config["from_email"]
REPLY_TO = _config["reply_to"]
ENABLE_GENERAL_ENQUIRIES = _config["enable_general_enquiries"]
MAX_SEND_ATTEMPTS = _config["max_attempts"]
FORM_MIN_SECONDS = _config["form_min_seconds"]
FORM_MAX_SECONDS = _config["form_max_seconds"]
RATE_LIMIT_WINDOW_SECONDS = _config["rate_limit_window_seconds"]
RATE_LIMIT_MAX_PER_IP = _config["rate_limit_max_per_ip"]
RATE_LIMIT_MAX_PER_EMAIL = _config["rate_limit_max_per_email"]
RATE_LIMIT_MIN_INTERVAL_SECONDS = _config["rate_limit_min_interval_seconds"]

LOGO_URL = "https://www.goodwalk.co.nz/images/goodwalk-auckland-dog-walking-logo.png"

logger.info(
    "Mail API config: version=%r timezone=%r from=%r reply_to=%r owner=%r owner_bcc=%r client_bcc=%r general_enquiries=%r max_attempts=%d form_min=%ss form_max=%ss rate_window=%ss per_ip=%d per_email=%d min_interval=%ss",
    APP_VERSION,
    os.environ.get("TZ", "system-default"),
    FROM_EMAIL,
    REPLY_TO,
    OWNER_EMAIL,
    OWNER_BCC,
    CLIENT_BCC,
    ENABLE_GENERAL_ENQUIRIES,
    MAX_SEND_ATTEMPTS,
    FORM_MIN_SECONDS,
    FORM_MAX_SECONDS,
    RATE_LIMIT_WINDOW_SECONDS,
    RATE_LIMIT_MAX_PER_IP,
    RATE_LIMIT_MAX_PER_EMAIL,
    RATE_LIMIT_MIN_INTERVAL_SECONDS,
)

app = FastAPI(title="GoodWalk Mail API")
STARTUP_TEST_RECIPIENT = OWNER_BCC if OWNER_BCC and OWNER_BCC.lower() != "example@example.com" else ""

# ── Auth state ───────────────────────────────────────────────────────────────

def _load_allowed_emails() -> set[str]:
    seed = {e.strip().lower() for e in os.environ.get("ALLOWED_EMAILS", "").split(",") if e.strip()}
    try:
        if _ALLOWED_EMAILS_FILE.exists():
            data = json.loads(_ALLOWED_EMAILS_FILE.read_text(encoding="utf-8"))
            seed.update(e.lower() for e in data.get("emails", []) if isinstance(e, str))
    except Exception as exc:
        logger.warning("Could not load allowed_emails file: %s", exc)
    return seed

def _save_allowed_emails_sync(emails: set[str]) -> None:
    try:
        _ALLOWED_EMAILS_FILE.parent.mkdir(parents=True, exist_ok=True)
        _ALLOWED_EMAILS_FILE.write_text(
            json.dumps({"emails": sorted(emails)}, indent=2), encoding="utf-8"
        )
    except Exception as exc:
        logger.warning("Could not save allowed_emails: %s", exc)


def _load_client_profiles() -> dict[str, dict]:
    try:
        if _CLIENT_PROFILES_FILE.exists():
            return json.loads(_CLIENT_PROFILES_FILE.read_text(encoding="utf-8"))
    except Exception as exc:
        logger.warning("Could not load client_profiles file: %s", exc)
    return {}


def _save_client_profiles_sync(profiles: dict) -> None:
    try:
        _CLIENT_PROFILES_FILE.parent.mkdir(parents=True, exist_ok=True)
        _CLIENT_PROFILES_FILE.write_text(json.dumps(profiles, indent=2), encoding="utf-8")
    except Exception as exc:
        logger.warning("Could not save client_profiles: %s", exc)


def _load_drafts() -> dict:
    try:
        if _DRAFTS_FILE.exists():
            return json.loads(_DRAFTS_FILE.read_text(encoding="utf-8"))
    except Exception as exc:
        logger.warning("Could not load drafts file: %s", exc)
    return {}


def _save_drafts_sync(drafts: dict) -> None:
    try:
        _DRAFTS_FILE.parent.mkdir(parents=True, exist_ok=True)
        _DRAFTS_FILE.write_text(json.dumps(drafts, indent=2), encoding="utf-8")
    except Exception as exc:
        logger.warning("Could not save drafts: %s", exc)


_allowed_emails: set[str] = _load_allowed_emails()
_pending_codes: dict[str, dict] = {}       # email -> {code, expires_at, attempts}
_active_sessions: dict[str, dict] = {}     # token -> {email, expires_at}
_code_requests: dict[str, deque] = {}      # email -> deque of monotonic timestamps
_client_profiles: dict[str, dict] = _load_client_profiles()
_drafts: dict[str, dict] = _load_drafts()    # email -> {onboarding: {...}, contract: {...}}
_auth_failures_by_ip: dict[str, deque] = {}  # ip -> deque of failure timestamps
_blocked_ips: dict[str, float] = {}           # ip -> unblock_at (monotonic)
_auth_lock = asyncio.Lock()

logger.info("Auth: loaded %d allowed email(s)", len(_allowed_emails))


async def _register_email(email: str) -> None:
    normalized = email.strip().lower()
    if not normalized:
        return
    async with _auth_lock:
        if normalized not in _allowed_emails:
            _allowed_emails.add(normalized)
            await asyncio.to_thread(_save_allowed_emails_sync, set(_allowed_emails))
            logger.info("Auth: registered new allowed email: %s", normalized)


async def _store_client_profile(email: str, profile: dict) -> None:
    normalized = email.strip().lower()
    if not normalized:
        return
    async with _auth_lock:
        existing = _client_profiles.get(normalized, {})
        merged = {k: v for k, v in {**existing, **profile}.items() if v}
        if merged != existing:
            _client_profiles[normalized] = merged
            await asyncio.to_thread(_save_client_profiles_sync, dict(_client_profiles))

def _check_ip_blocked(ip: str, request_id: str) -> None:
    now = time.monotonic()
    unblock_at = _blocked_ips.get(ip)
    if unblock_at is not None:
        if now < unblock_at:
            remaining = int(unblock_at - now)
            logger.warning("[%s] auth: blocked ip=%s (%ds remaining)", request_id, ip, remaining)
            raise HTTPException(
                status_code=429,
                detail=f"Too many failed attempts. Try again in {remaining // 60 + 1} minute(s).",
                headers={"Retry-After": str(remaining)},
            )
        else:
            del _blocked_ips[ip]


def _record_auth_failure(ip: str, request_id: str, reason: str) -> None:
    now = time.monotonic()
    failures = _auth_failures_by_ip.setdefault(ip, deque())
    while failures and now - failures[0] > AUTH_IP_FAILURE_WINDOW:
        failures.popleft()
    failures.append(now)
    logger.warning("[%s] auth: failure ip=%s reason=%r total_in_window=%d", request_id, ip, reason, len(failures))
    if len(failures) >= AUTH_IP_MAX_FAILURES:
        _blocked_ips[ip] = now + AUTH_IP_BLOCK_DURATION
        logger.warning(
            "[%s] auth: ip=%s BLOCKED for %ds after %d failures",
            request_id, ip, AUTH_IP_BLOCK_DURATION, len(failures),
        )


app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_methods=["POST", "GET"],
    allow_headers=["*"],
)


@app.middleware("http")
async def _request_logging_middleware(request: Request, call_next):
    request_id = uuid.uuid4().hex[:8]
    request.state.request_id = request_id
    started = time.monotonic()
    try:
        response = await call_next(request)
    except Exception:
        elapsed_ms = (time.monotonic() - started) * 1000
        logger.exception(
            "[%s] %s %s crashed after %.0fms",
            request_id, request.method, request.url.path, elapsed_ms,
        )
        raise
    elapsed_ms = (time.monotonic() - started) * 1000
    logger.info(
        "[%s] %s %s → %d (%.0fms)",
        request_id, request.method, request.url.path, response.status_code, elapsed_ms,
    )
    response.headers["X-Request-ID"] = request_id
    return response


class BaseSubmission(BaseModel):
    fullName: str
    email: EmailStr
    phone: str
    website: str = ""
    formStartedAt: int | None = None
    visitStartedAt: int | None = None
    pageEnteredAt: int | None = None
    firstInteractionAt: int | None = None
    sendClickedAt: int | None = None
    referrer: str = ""
    page: str = ""


class BookingSubmission(BaseSubmission):
    enquiryType: str = "booking"
    petName: str = ""
    location: str = ""
    message: str = ""
    services: list[str] = []
    stepChanges: int = 0
    journey: list[str] = []


class OnboardingSubmission(BaseSubmission):
    address: str
    dogName: str
    dogBreed: str
    dogAge: str = ""
    servicesNeeded: list[str] = []
    temperament: str = ""
    medicalNotes: str = ""
    accessInstructions: str = ""
    vetName: str
    vetPhone: str
    emergencyContactName: str
    emergencyContactPhone: str
    councilRegistrationConfirmed: bool = False
    vaccinationsConfirmed: bool = False
    emergencyVetConsent: bool = False
    termsAccepted: bool = False
    signatureDataUrl: str


class ContractSubmission(BaseSubmission):
    address: str
    dogName: str
    dogBreed: str
    dogAge: str = ""
    serviceType: str
    startDate: str
    walkFrequency: str = ""
    additionalNotes: str = ""
    agreeServiceTerms: bool = False
    agreeCancellation: bool = False
    agreePayment: bool = False
    agreeEmergency: bool = False
    agreeLiability: bool = False
    agreeAccuracy: bool = False
    signatureDataUrl: str


# ── Helpers ──────────────────────────────────────────────────────────────────

def _get_ip(request: Request) -> str:
    forwarded = request.headers.get("x-forwarded-for")
    if forwarded:
        return forwarded.split(",")[0].strip()
    return request.client.host if request.client else "unknown"


_submit_attempts_by_ip: dict[str, deque[float]] = {}
_submit_attempts_by_email: dict[str, deque[float]] = {}
_submit_rate_limit_lock = asyncio.Lock()


def _trimmed(value: str) -> str:
    return value.strip()


def _prune_attempts(attempts: deque[float], now: float, window_seconds: int) -> None:
    while attempts and now - attempts[0] > window_seconds:
        attempts.popleft()


def _seconds_until_allowed(last_attempt_at: float, now: float, min_interval_seconds: int) -> int:
    retry_after = max(1, int(min_interval_seconds - (now - last_attempt_at)))
    return retry_after


async def _enforce_submit_rate_limits(request_id: str, ip: str, email: str) -> None:
    now = time.monotonic()
    normalized_email = email.strip().lower()

    async with _submit_rate_limit_lock:
        ip_attempts = _submit_attempts_by_ip.setdefault(ip, deque())
        email_attempts = _submit_attempts_by_email.setdefault(normalized_email, deque())

        _prune_attempts(ip_attempts, now, RATE_LIMIT_WINDOW_SECONDS)
        _prune_attempts(email_attempts, now, RATE_LIMIT_WINDOW_SECONDS)

        if ip_attempts and now - ip_attempts[-1] < RATE_LIMIT_MIN_INTERVAL_SECONDS:
            retry_after = _seconds_until_allowed(ip_attempts[-1], now, RATE_LIMIT_MIN_INTERVAL_SECONDS)
            logger.warning(
                "[%s] rate limited: ip=%s submitted again after %.1fs (minimum %ss)",
                request_id,
                ip,
                now - ip_attempts[-1],
                RATE_LIMIT_MIN_INTERVAL_SECONDS,
            )
            raise HTTPException(
                status_code=429,
                detail=f"Please wait about {retry_after} seconds before trying again.",
            )

        if len(ip_attempts) >= RATE_LIMIT_MAX_PER_IP:
            logger.warning(
                "[%s] rate limited: ip=%s exceeded %d submissions in %ss",
                request_id,
                ip,
                RATE_LIMIT_MAX_PER_IP,
                RATE_LIMIT_WINDOW_SECONDS,
            )
            raise HTTPException(
                status_code=429,
                detail="Too many enquiries from this connection. Please try again a little later.",
            )

        if len(email_attempts) >= RATE_LIMIT_MAX_PER_EMAIL:
            logger.warning(
                "[%s] rate limited: email=%s exceeded %d submissions in %ss",
                request_id,
                normalized_email,
                RATE_LIMIT_MAX_PER_EMAIL,
                RATE_LIMIT_WINDOW_SECONDS,
            )
            raise HTTPException(
                status_code=429,
                detail="That email address has reached the enquiry limit for now. Please try again later.",
            )

        ip_attempts.append(now)
        email_attempts.append(now)


def _enforce_form_timing(request_id: str, data: BaseSubmission) -> None:
    if data.formStartedAt is None or data.formStartedAt <= 0:
        logger.warning("[%s] rejected: missing or invalid formStartedAt", request_id)
        raise HTTPException(
            status_code=400,
            detail="Please refresh the page and try again.",
        )

    elapsed_seconds = (time.time() * 1000 - data.formStartedAt) / 1000

    if elapsed_seconds < FORM_MIN_SECONDS:
        logger.warning(
            "[%s] rejected: form submitted too quickly (%.2fs < %ss)",
            request_id,
            elapsed_seconds,
            FORM_MIN_SECONDS,
        )
        raise HTTPException(
            status_code=400,
            detail="Please take a moment to fill in the form before sending it.",
        )

    if elapsed_seconds > FORM_MAX_SECONDS:
        logger.warning(
            "[%s] rejected: stale form submission (%.0fs > %ss)",
            request_id,
            elapsed_seconds,
            FORM_MAX_SECONDS,
        )
        raise HTTPException(
            status_code=400,
            detail="This form has been open for too long. Please refresh the page and try again.",
        )


def _is_honeypot_triggered(data: BaseSubmission) -> bool:
    return bool(_trimmed(data.website))


def _is_general_enquiry(data: BookingSubmission) -> bool:
    return _trimmed(data.enquiryType).lower() == "general"


def _enquiry_type_label(data: BookingSubmission) -> str:
    return "General enquiry" if _is_general_enquiry(data) else "Booking enquiry"


def _validate_submission(request_id: str, data: BookingSubmission) -> None:
    enquiry_type = _trimmed(data.enquiryType).lower()

    if enquiry_type not in {"booking", "general"}:
        logger.warning("[%s] rejected: invalid enquiryType=%r", request_id, data.enquiryType)
        raise HTTPException(
            status_code=400,
            detail="Please choose a valid enquiry type and try again.",
        )

    if not _trimmed(data.fullName):
        logger.warning("[%s] rejected: missing full name", request_id)
        raise HTTPException(
            status_code=400,
            detail="Please enter your full name.",
        )

    if not _trimmed(data.phone):
        logger.warning("[%s] rejected: missing phone number", request_id)
        raise HTTPException(
            status_code=400,
            detail="Please enter your contact number.",
        )

    if _is_general_enquiry(data):
        if not ENABLE_GENERAL_ENQUIRIES:
            logger.warning("[%s] rejected: general enquiries are disabled", request_id)
            raise HTTPException(
                status_code=403,
                detail="General enquiries are currently unavailable through this form.",
            )
        if not _trimmed(data.message):
            logger.warning("[%s] rejected: missing general enquiry message", request_id)
            raise HTTPException(
                status_code=400,
                detail="Please tell us how we can help.",
            )
        return

    if not _trimmed(data.petName):
        logger.warning("[%s] rejected: missing pet name", request_id)
        raise HTTPException(
            status_code=400,
            detail="Please enter your dog's name.",
        )

    if not _trimmed(data.location):
        logger.warning("[%s] rejected: missing location", request_id)
        raise HTTPException(
            status_code=400,
            detail="Please enter your location.",
        )


def _normalize_submission(data: BookingSubmission) -> None:
    data.enquiryType = "general" if _is_general_enquiry(data) else "booking"
    data.fullName = _trimmed(data.fullName)
    data.phone = _trimmed(data.phone)
    data.petName = _trimmed(data.petName)
    data.location = _trimmed(data.location)
    data.message = _trimmed(data.message)
    data.referrer = _trimmed(data.referrer)
    data.page = _trimmed(data.page)
    data.services = [_trimmed(service) for service in data.services if _trimmed(service)]
    data.journey = [_trimmed(step) for step in data.journey if _trimmed(step)][:12]
    data.stepChanges = max(0, data.stepChanges)

    for field_name in ("visitStartedAt", "pageEnteredAt", "firstInteractionAt", "sendClickedAt"):
        value = getattr(data, field_name)
        if value is None or value <= 0:
            setattr(data, field_name, None)

    if _is_general_enquiry(data):
        data.petName = ""
        data.location = ""
        data.services = []


def _validate_onboarding_submission(request_id: str, data: OnboardingSubmission) -> None:
    if not _trimmed(data.fullName):
        logger.warning("[%s] onboarding rejected: missing full name", request_id)
        raise HTTPException(status_code=400, detail="Please enter your full name.")

    if not _trimmed(data.phone):
        logger.warning("[%s] onboarding rejected: missing phone", request_id)
        raise HTTPException(status_code=400, detail="Please enter your phone number.")

    required_fields = {
        "address": "Please enter your address.",
        "dogName": "Please enter your dog's name.",
        "dogBreed": "Please enter your dog's breed.",
        "vetName": "Please enter your vet clinic name.",
        "vetPhone": "Please enter your vet phone number.",
        "emergencyContactName": "Please enter an emergency contact name.",
        "emergencyContactPhone": "Please enter an emergency contact phone number.",
    }

    for field_name, message in required_fields.items():
        if not _trimmed(getattr(data, field_name)):
            logger.warning("[%s] onboarding rejected: missing %s", request_id, field_name)
            raise HTTPException(status_code=400, detail=message)

    if not data.servicesNeeded:
        logger.warning("[%s] onboarding rejected: missing services", request_id)
        raise HTTPException(status_code=400, detail="Please choose at least one service.")

    if not data.councilRegistrationConfirmed:
        raise HTTPException(status_code=400, detail="Please confirm council registration.")

    if not data.vaccinationsConfirmed:
        raise HTTPException(status_code=400, detail="Please confirm vaccinations are current.")

    if not data.emergencyVetConsent:
        raise HTTPException(status_code=400, detail="Please confirm emergency veterinary consent.")

    if not data.termsAccepted:
        raise HTTPException(status_code=400, detail="Please confirm the onboarding declaration.")

    signature = _trimmed(data.signatureDataUrl)
    if not signature.startswith("data:image/png;base64,") or len(signature) < 128:
        logger.warning("[%s] onboarding rejected: invalid signature payload", request_id)
        raise HTTPException(status_code=400, detail="Please add your signature before sending.")


def _normalize_onboarding_submission(data: OnboardingSubmission) -> None:
    data.fullName = _trimmed(data.fullName)
    data.phone = _trimmed(data.phone)
    data.address = _trimmed(data.address)
    data.dogName = _trimmed(data.dogName)
    data.dogBreed = _trimmed(data.dogBreed)
    data.dogAge = _trimmed(data.dogAge)
    data.temperament = _trimmed(data.temperament)
    data.medicalNotes = _trimmed(data.medicalNotes)
    data.accessInstructions = _trimmed(data.accessInstructions)
    data.vetName = _trimmed(data.vetName)
    data.vetPhone = _trimmed(data.vetPhone)
    data.emergencyContactName = _trimmed(data.emergencyContactName)
    data.emergencyContactPhone = _trimmed(data.emergencyContactPhone)
    data.referrer = _trimmed(data.referrer)
    data.page = _trimmed(data.page)
    data.servicesNeeded = [_trimmed(service) for service in data.servicesNeeded if _trimmed(service)][:8]

    for field_name in ("visitStartedAt", "pageEnteredAt", "firstInteractionAt", "sendClickedAt"):
        value = getattr(data, field_name)
        if value is None or value <= 0:
            setattr(data, field_name, None)


def _parse_ua(ua: str) -> str:
    if not ua:
        return "Unknown"
    browsers = [("Edg/", "Edge"), ("OPR/", "Opera"), ("Chrome/", "Chrome"),
                ("Firefox/", "Firefox"), ("Safari/", "Safari")]
    systems = [("Windows NT 10", "Windows 10/11"), ("Windows NT 6", "Windows 8"),
               ("Mac OS X", "macOS"), ("iPhone", "iPhone"), ("iPad", "iPad"),
               ("Android", "Android"), ("Linux", "Linux")]
    browser = next((n for p, n in browsers if p in ua), "Unknown browser")
    system = next((n for p, n in systems if p in ua), "Unknown OS")
    return f"{browser} on {system}"


def _detail_row(label: str, value: str) -> str:
    if not value:
        return ""
    return f"""
    <tr>
      <td style="padding:8px 0;color:#888;font-size:13px;white-space:nowrap;
                 font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                 vertical-align:top;width:130px;">{label}</td>
      <td style="padding:8px 0 8px 16px;color:#213021;font-size:14px;font-weight:500;
                 font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                 vertical-align:top;">{value}</td>
    </tr>"""


def _meta_row(label: str, value: str) -> str:
    if not value:
        return ""
    return f"""
    <tr>
      <td style="padding:5px 0;color:#aaa;font-size:12px;white-space:nowrap;
                 font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                 vertical-align:top;width:100px;">{label}</td>
      <td style="padding:5px 0 5px 16px;color:#666;font-size:12px;
                 font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                 vertical-align:top;word-break:break-all;">{value}</td>
    </tr>"""


def _format_duration_ms(duration_ms: int | None) -> str:
    if duration_ms is None or duration_ms < 0:
        return ""

    total_seconds = int(round(duration_ms / 1000))
    minutes, seconds = divmod(total_seconds, 60)
    hours, minutes = divmod(minutes, 60)

    if hours > 0:
        return f"{hours}h {minutes}m"
    if minutes > 0:
        return f"{minutes}m {seconds}s"
    return f"{seconds}s"


def _duration_between(start_ms: int | None, end_ms: int | None) -> str:
    if start_ms is None or end_ms is None or end_ms < start_ms:
        return ""
    return _format_duration_ms(end_ms - start_ms)


def _journey_text(journey: list[str]) -> str:
    if not journey:
        return ""
    return " -> ".join(journey)


# ── Email templates ──────────────────────────────────────────────────────────

def _logo_header(badge_html: str = "", subtitle: str = "") -> str:
    badge = f'<div style="margin-top:20px;">{badge_html}</div>' if badge_html else ""
    sub = f"""<div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                          font-size:13px;color:#7aaa7a;letter-spacing:0.04em;margin-top:8px;">
                {subtitle}</div>""" if subtitle else ""
    return f"""
        <tr>
          <td style="background:#213021;padding:36px 48px 32px;text-align:center;">
            <img src="{LOGO_URL}" width="161" height="32" alt="GoodWalk"
                 style="display:inline-block;max-width:161px;height:auto;border:0;">
            {sub}
            {badge}
          </td>
        </tr>"""


def client_email(data: BookingSubmission) -> str:
    is_general = _is_general_enquiry(data)
    services_text = ", ".join(data.services) if data.services else "Not specified"
    enquiry_summary_rows = [
        _detail_row("Your name", data.fullName),
        _detail_row("Email", str(data.email)),
        _detail_row("Phone", data.phone),
        _detail_row("Type", _enquiry_type_label(data)),
    ]

    if is_general:
        if data.message:
            enquiry_summary_rows.append(_detail_row("Message", data.message))
        intro_html = (
            "We&rsquo;ve received your message and we will be in touch shortly."
        )
        next_steps_html = (
            "We will review your message and reply within 1 business day."
        )
        logo_subtitle = "General enquiries and dog walking support"
    else:
        enquiry_summary_rows.extend(
            [
                _detail_row("Dog&rsquo;s name", data.petName),
                _detail_row("Location", data.location),
                _detail_row("Services", services_text),
            ]
        )
        if data.message:
            enquiry_summary_rows.append(_detail_row("About the dog", data.message))
        intro_html = (
            "We&rsquo;ve received your enquiry and we will be in touch shortly to arrange "
            "a <strong style=\"color:#213021;\">Meet &amp; Greet</strong> with you and "
            f"{data.petName}."
        )
        next_steps_html = (
            "We will review your details and reach out within 1 business day "
            "to schedule a free Meet &amp; Greet. No commitment required &mdash; just a "
            f"chance for {data.petName} to make a new best friend."
        )
        logo_subtitle = "Professional dog walking services"

    return f"""<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <title>We received your enquiry</title>
</head>
<body style="margin:0;padding:0;background:#f2f2f0;">

  <table width="100%" cellpadding="0" cellspacing="0" role="presentation"
         style="background:#f2f2f0;padding:40px 16px;">
    <tr><td align="center">

      <table width="600" cellpadding="0" cellspacing="0" role="presentation"
             style="max-width:600px;width:100%;border-radius:16px;overflow:hidden;
                    box-shadow:0 4px 24px rgba(0,0,0,0.08);">

        {_logo_header(subtitle=logo_subtitle)}

        <!-- Body -->
        <tr>
          <td style="background:#ffffff;padding:48px 48px 40px;">

            <h1 style="margin:0 0 8px;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                       font-size:26px;font-weight:700;color:#213021;line-height:1.2;">
              Thanks, {data.fullName.split()[0]}! &#x1F43E;
            </h1>
            <p style="margin:0 0 32px;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                      font-size:16px;color:#555;line-height:1.65;">
              {intro_html}
            </p>

            <!-- Details card -->
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation"
                   style="background:#f8f7f4;border-radius:12px;margin-bottom:36px;">
              <tr>
                <td style="padding:28px 32px;">
                  <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                              font-size:11px;font-weight:700;letter-spacing:0.1em;
                              color:#888;text-transform:uppercase;margin-bottom:20px;">
                    Your enquiry summary
                  </div>
                  <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                    {"".join(enquiry_summary_rows)}
                  </table>
                </td>
              </tr>
            </table>

            <!-- What's next -->
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation"
                   style="border-left:3px solid #FFD100;margin-bottom:36px;">
              <tr>
                <td style="padding:4px 0 4px 20px;">
                  <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                              font-size:13px;font-weight:700;color:#213021;margin-bottom:6px;">
                    What happens next?
                  </div>
                  <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                              font-size:14px;color:#666;line-height:1.6;">
                    {next_steps_html}
                  </div>
                </td>
              </tr>
            </table>

            <p style="margin:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                      font-size:14px;color:#888;line-height:1.6;">
              Questions? Just reply to this email or reach us at 022 642 1011.
            </p>

          </td>
        </tr>

        <!-- Footer -->
        <tr>
          <td style="background:#213021;padding:24px 48px;text-align:center;">
            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                        font-size:12px;color:#5a8a5a;line-height:1.6;">
              GoodWalk &middot; Auckland, New Zealand<br>
              <a href="https://www.goodwalk.co.nz" style="color:#7aaa7a;text-decoration:none;">
                goodwalk.co.nz
              </a>
            </div>
          </td>
        </tr>

      </table>
    </td></tr>
  </table>

</body>
</html>"""


def owner_email(data: BookingSubmission, ip: str, browser: str) -> str:
    is_general = _is_general_enquiry(data)
    services_text = ", ".join(data.services) if data.services else "—"
    now = datetime.now()
    submitted_at = now.strftime("%d %b %Y at %I:%M %p").lstrip("0")
    first_name = data.fullName.split()[0] if data.fullName.strip() else "them"
    email_title = "New GoodWalk Enquiry" if is_general else "New GoodWalk Lead"

    message_label = "Message" if is_general else "About the dog"
    message_block = f"""
    <tr>
      <td colspan="2" style="padding:16px 0 0;">
        <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                    font-size:11px;font-weight:700;letter-spacing:0.08em;color:#888;
                    text-transform:uppercase;margin-bottom:8px;">{message_label}</div>
        <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                    font-size:14px;color:#444;line-height:1.6;background:#f0efe9;
                    border-radius:8px;padding:14px 16px;">{data.message}</div>
      </td>
    </tr>""" if data.message else ""

    badge = """<div style="display:inline-block;background:#FFD100;border-radius:100px;
                            padding:10px 28px;">
                 <span style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                              font-size:18px;font-weight:700;color:#213021;">
                   &#x1F4E9;&nbsp; New enquiry!
                 </span>
               </div>
               <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                           font-size:12px;color:#5a8a5a;margin-top:12px;">
                 Submitted {submitted_at}
               </div>""".format(submitted_at=submitted_at)

    referrer_row = _meta_row("Came from", data.referrer) if data.referrer else _meta_row("Came from", "Direct / bookmark")
    page_row = _meta_row("Page", data.page) if data.page else ""
    visit_time_row = _meta_row("Time on site", _duration_between(data.visitStartedAt, data.sendClickedAt))
    page_time_row = _meta_row("Time on page", _duration_between(data.pageEnteredAt, data.sendClickedAt))
    active_time_row = _meta_row("Active form time", _duration_between(data.firstInteractionAt, data.sendClickedAt))
    form_time_row = _meta_row("Form open time", _duration_between(data.formStartedAt, data.sendClickedAt))
    step_changes_row = _meta_row("Step changes", str(data.stepChanges)) if data.stepChanges else ""
    journey_row = _meta_row("Journey", _journey_text(data.journey))
    detail_heading = "Enquiry details" if is_general else "Dog &amp; services"
    detail_rows = [_detail_row("Type", _enquiry_type_label(data))]

    if is_general:
        if data.petName:
            detail_rows.append(_detail_row("Dog", data.petName))
        if data.location:
            detail_rows.append(_detail_row("Location", data.location))
    else:
        detail_rows.extend(
            [
                _detail_row("Dog", data.petName),
                _detail_row("Location", data.location),
                _detail_row("Services", services_text),
            ]
        )

    return f"""<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <meta name="color-scheme" content="light only">
  <meta name="supported-color-schemes" content="light">
  <title>{email_title}</title>
  <style>
    :root {{
      color-scheme: light only;
      supported-color-schemes: light;
    }}

    body,
    table,
    td,
    div,
    p,
    span,
    a {{
      forced-color-adjust: none !important;
      -webkit-text-size-adjust: 100%;
    }}

    .gw-owner-body {{
      background: #f2f2f0 !important;
      color: #213021 !important;
    }}

    .gw-owner-shell {{
      background: #ffffff !important;
    }}

    .gw-owner-dark-panel {{
      background: #213021 !important;
    }}

    .gw-owner-email-chip {{
      display: inline-block;
      background: #ffffff !important;
      color: #213021 !important;
      border-radius: 10px;
      padding: 12px 14px;
      border: 1px solid #d9dfd9;
      text-decoration: none !important;
    }}

    .gw-owner-email-chip,
    .gw-owner-email-chip a,
    a.gw-owner-email-chip {{
      color: #213021 !important;
    }}

    @media (prefers-color-scheme: dark) {{
      html,
      body,
      .gw-owner-body {{
        background: #f2f2f0 !important;
        color: #213021 !important;
      }}

      .gw-owner-shell,
      .gw-owner-shell td {{
        background: #ffffff !important;
        color: #213021 !important;
      }}

      .gw-owner-dark-panel,
      .gw-owner-dark-panel td {{
        background: #213021 !important;
      }}

      .gw-owner-email-chip,
      .gw-owner-email-chip a,
      a.gw-owner-email-chip {{
        background: #ffffff !important;
        color: #213021 !important;
      }}
    }}
  </style>
</head>
<body class="gw-owner-body" style="margin:0;padding:0;background:#f2f2f0;color:#213021;">

  <table width="100%" cellpadding="0" cellspacing="0" role="presentation" bgcolor="#f2f2f0"
         style="background:#f2f2f0;padding:40px 16px;">
    <tr><td align="center">

      <table class="gw-owner-shell" width="600" cellpadding="0" cellspacing="0" role="presentation" bgcolor="#ffffff"
             style="max-width:600px;width:100%;border-radius:16px;overflow:hidden;
                    box-shadow:0 4px 24px rgba(0,0,0,0.08);background:#ffffff;">

        {_logo_header(badge_html=badge)}

        <!-- Body -->
        <tr>
          <td bgcolor="#ffffff" style="background:#ffffff;padding:40px 48px 36px;color:#213021;">

            <!-- Quick contact -->
            <table class="gw-owner-dark-panel" width="100%" cellpadding="0" cellspacing="0" role="presentation" bgcolor="#213021"
                   style="background:#213021;border-radius:12px;margin-bottom:28px;">
              <tr>
                <td bgcolor="#213021" style="padding:22px 24px;background:#213021;">
                  <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                              font-size:11px;font-weight:700;letter-spacing:0.1em;color:#7aaa7a;
                              text-transform:uppercase;margin-bottom:10px;">
                    Quick contact
                  </div>
                  <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                              font-size:14px;color:#d8e6d8;line-height:1.6;margin-bottom:10px;">
                    Email {first_name} directly:
                  </div>
                  <div style="margin-bottom:12px;">
                    <a href="mailto:{data.email}" class="gw-owner-email-chip"
                       style="display:inline-block;background:#ffffff;color:#213021 !important;
                              font-family:Menlo,Consolas,'SFMono-Regular',monospace;
                              font-size:20px;font-weight:700;line-height:1.4;word-break:break-all;
                              border-radius:10px;padding:12px 14px;border:1px solid #d9dfd9;
                              text-decoration:none;">
                      {data.email}
                    </a>
                  </div>
                  <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                              font-size:12px;color:#b7cbb7;line-height:1.6;">
                    Tap and hold the address to copy on iPhone, or tap below to open a new email.
                  </div>
                </td>
              </tr>
            </table>

            <!-- Owner details -->
            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                        font-size:11px;font-weight:700;letter-spacing:0.1em;color:#888;
                        text-transform:uppercase;margin-bottom:16px;">Owner details</div>

            <table width="100%" cellpadding="0" cellspacing="0" role="presentation"
                   style="background:#f8f7f4;border-radius:12px;margin-bottom:28px;">
              <tr><td style="padding:24px 28px;">
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  <tr>
                    <td style="padding:6px 0;font-size:13px;color:#888;width:80px;
                               font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                               vertical-align:top;">Name</td>
                    <td style="padding:6px 0 6px 16px;font-size:15px;font-weight:600;
                               color:#213021;font-family:-apple-system,BlinkMacSystemFont,
                               'Segoe UI',sans-serif;vertical-align:top;">{data.fullName}</td>
                  </tr>
                  <tr>
                    <td style="padding:6px 0;font-size:13px;color:#888;
                               font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                               vertical-align:top;">Email</td>
                    <td style="padding:6px 0 6px 16px;font-size:14px;
                               font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                               vertical-align:top;">
                      <a href="mailto:{data.email}" style="color:#213021;font-weight:500;
                         text-decoration:none;">{data.email}</a>
                    </td>
                  </tr>
                  <tr>
                    <td style="padding:6px 0;font-size:13px;color:#888;
                               font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                               vertical-align:top;">Phone</td>
                    <td style="padding:6px 0 6px 16px;font-size:14px;
                               font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                               vertical-align:top;">
                      <a href="tel:{data.phone}" style="color:#213021;font-weight:500;
                         text-decoration:none;">{data.phone}</a>
                    </td>
                  </tr>
                </table>
              </td></tr>
            </table>

            <!-- Dog & service details -->
            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                        font-size:11px;font-weight:700;letter-spacing:0.1em;color:#888;
                        text-transform:uppercase;margin-bottom:16px;">{detail_heading}</div>

            <table width="100%" cellpadding="0" cellspacing="0" role="presentation"
                   style="background:#f8f7f4;border-radius:12px;margin-bottom:28px;">
              <tr><td style="padding:24px 28px;">
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  {"".join(detail_rows)}
                  {message_block}
                </table>
              </td></tr>
            </table>

            <!-- CTA buttons -->
            <table cellpadding="0" cellspacing="0" role="presentation" style="margin-bottom:32px;">
              <tr>
                <td style="padding-right:12px;">
                  <a href="mailto:{data.email}"
                     style="display:inline-block;background:#213021;color:#FFD100;
                            font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                            font-size:14px;font-weight:600;text-decoration:none;
                            border-radius:8px;padding:12px 24px;">
                    Email {first_name}
                  </a>
                </td>
                <td>
                  <a href="tel:{data.phone}"
                     style="display:inline-block;background:#f8f7f4;color:#213021;
                            font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                            font-size:14px;font-weight:600;text-decoration:none;
                            border-radius:8px;padding:12px 24px;border:1px solid #e0e0d8;">
                    Call {data.phone}
                  </a>
                </td>
              </tr>
            </table>

            <!-- Session info -->
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation"
                   style="border-top:1px solid #eeeee8;padding-top:20px;">
              <tr><td>
                <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                            font-size:11px;font-weight:700;letter-spacing:0.08em;color:#ccc;
                            text-transform:uppercase;margin-bottom:12px;">Session info</div>
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  {_meta_row("IP address", ip)}
                  {_meta_row("Browser", browser)}
                  {visit_time_row}
                  {page_time_row}
                  {active_time_row}
                  {form_time_row}
                  {step_changes_row}
                  {referrer_row}
                  {page_row}
                  {journey_row}
                </table>
              </td></tr>
            </table>

          </td>
        </tr>

        <!-- Footer -->
        <tr>
          <td style="background:#f8f7f4;padding:18px 48px;text-align:center;
                     border-top:1px solid #e8e8e4;">
            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                        font-size:12px;color:#bbb;">
              Sent automatically by GoodWalk enquiry form
            </div>
          </td>
        </tr>

      </table>
    </td></tr>
  </table>

</body>
</html>"""


def owner_onboarding_email(data: OnboardingSubmission, ip: str, browser: str) -> str:
    submitted_at = datetime.now().strftime("%d %b %Y at %I:%M %p").lstrip("0")
    services_text = ", ".join(data.servicesNeeded)
    visit_time_row = _meta_row("Time on site", _duration_between(data.visitStartedAt, data.sendClickedAt))
    page_time_row = _meta_row("Time on page", _duration_between(data.pageEnteredAt, data.sendClickedAt))
    active_time_row = _meta_row("Active form time", _duration_between(data.firstInteractionAt, data.sendClickedAt))
    form_time_row = _meta_row("Form open time", _duration_between(data.formStartedAt, data.sendClickedAt))
    referrer_row = _meta_row("Came from", data.referrer) if data.referrer else _meta_row("Came from", "Direct / bookmark")
    page_row = _meta_row("Page", data.page) if data.page else ""

    dog_notes_block = f"""
      <tr>
        <td colspan="2" style="padding:16px 0 0;">
          <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                      font-size:11px;font-weight:700;letter-spacing:0.08em;color:#888;
                      text-transform:uppercase;margin-bottom:8px;">Temperament and routine</div>
          <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                      font-size:14px;color:#444;line-height:1.6;background:#f0efe9;
                      border-radius:8px;padding:14px 16px;">{data.temperament}</div>
        </td>
      </tr>""" if data.temperament else ""

    medical_block = f"""
      <tr>
        <td colspan="2" style="padding:16px 0 0;">
          <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                      font-size:11px;font-weight:700;letter-spacing:0.08em;color:#888;
                      text-transform:uppercase;margin-bottom:8px;">Medical notes</div>
          <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                      font-size:14px;color:#444;line-height:1.6;background:#f0efe9;
                      border-radius:8px;padding:14px 16px;">{data.medicalNotes}</div>
        </td>
      </tr>""" if data.medicalNotes else ""

    access_block = f"""
      <tr>
        <td colspan="2" style="padding:16px 0 0;">
          <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                      font-size:11px;font-weight:700;letter-spacing:0.08em;color:#888;
                      text-transform:uppercase;margin-bottom:8px;">Home access instructions</div>
          <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                      font-size:14px;color:#444;line-height:1.6;background:#f0efe9;
                      border-radius:8px;padding:14px 16px;">{data.accessInstructions}</div>
        </td>
      </tr>""" if data.accessInstructions else ""

    signature_block = f"""
      <div style="margin-top:16px;border-radius:16px;background:#ffffff;border:1px solid #e3e3db;padding:14px 14px 10px;">
        <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                    font-size:11px;font-weight:700;letter-spacing:0.1em;color:#888;
                    text-transform:uppercase;margin-bottom:10px;">Captured signature</div>
        <img src="{data.signatureDataUrl}" alt="Client signature" style="display:block;max-width:100%;height:auto;border-radius:10px;background:#fff;">
      </div>"""

    badge = f"""<div style="display:inline-block;background:#FFD100;border-radius:100px;
                            padding:10px 28px;">
                 <span style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                              font-size:18px;font-weight:700;color:#213021;">
                   &#x270D;&nbsp; New onboarding form
                 </span>
               </div>
               <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                           font-size:12px;color:#5a8a5a;margin-top:12px;">
                 Submitted {submitted_at}
               </div>"""

    return f"""<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <title>New GoodWalk onboarding form</title>
</head>
<body style="margin:0;padding:0;background:#f2f2f0;">
  <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="background:#f2f2f0;padding:40px 16px;">
    <tr><td align="center">
      <table width="680" cellpadding="0" cellspacing="0" role="presentation"
             style="max-width:680px;width:100%;border-radius:16px;overflow:hidden;box-shadow:0 4px 24px rgba(0,0,0,0.08);">

        {_logo_header(badge_html=badge, subtitle="Signed onboarding form")}

        <tr>
          <td style="background:#ffffff;padding:38px 40px 34px;">
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation"
                   style="background:#213021;border-radius:12px;margin-bottom:26px;">
              <tr>
                <td style="padding:22px 24px;">
                  <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:11px;font-weight:700;letter-spacing:0.1em;color:#7aaa7a;text-transform:uppercase;margin-bottom:10px;">
                    Quick contact
                  </div>
                  <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:14px;color:#d8e6d8;line-height:1.6;margin-bottom:10px;">
                    Reply directly to the owner or call them back:
                  </div>
                  <div style="margin-bottom:10px;">
                    <a href="mailto:{data.email}" style="display:inline-block;background:#ffffff;color:#213021;text-decoration:none;border-radius:10px;padding:12px 14px;border:1px solid #d9dfd9;font-family:Menlo,Consolas,'SFMono-Regular',monospace;font-size:18px;font-weight:700;">{data.email}</a>
                  </div>
                  <a href="tel:{data.phone}" style="display:inline-block;background:#ffd100;color:#213021;text-decoration:none;border-radius:999px;padding:10px 16px;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:14px;font-weight:700;">Call {data.phone}</a>
                </td>
              </tr>
            </table>

            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:11px;font-weight:700;letter-spacing:0.1em;color:#888;text-transform:uppercase;margin-bottom:16px;">Owner details</div>
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="background:#f8f7f4;border-radius:12px;margin-bottom:24px;">
              <tr><td style="padding:24px 28px;">
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  {_detail_row("Name", data.fullName)}
                  {_detail_row("Email", str(data.email))}
                  {_detail_row("Phone", data.phone)}
                  {_detail_row("Address", data.address)}
                </table>
              </td></tr>
            </table>

            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:11px;font-weight:700;letter-spacing:0.1em;color:#888;text-transform:uppercase;margin-bottom:16px;">Dog and service details</div>
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="background:#f8f7f4;border-radius:12px;margin-bottom:24px;">
              <tr><td style="padding:24px 28px;">
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  {_detail_row("Dog", data.dogName)}
                  {_detail_row("Breed", data.dogBreed)}
                  {_detail_row("Age", data.dogAge or "—")}
                  {_detail_row("Service", services_text)}
                  {dog_notes_block}
                  {medical_block}
                  {access_block}
                </table>
              </td></tr>
            </table>

            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:11px;font-weight:700;letter-spacing:0.1em;color:#888;text-transform:uppercase;margin-bottom:16px;">Safety details</div>
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="background:#f8f7f4;border-radius:12px;margin-bottom:24px;">
              <tr><td style="padding:24px 28px;">
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  {_detail_row("Vet clinic", data.vetName)}
                  {_detail_row("Vet phone", data.vetPhone)}
                  {_detail_row("Emergency contact", data.emergencyContactName)}
                  {_detail_row("Emergency phone", data.emergencyContactPhone)}
                  {_detail_row("Council registration", "Confirmed")}
                  {_detail_row("Vaccinations", "Confirmed")}
                  {_detail_row("Emergency consent", "Confirmed")}
                  {_detail_row("Declaration", "Signed")}
                </table>
                {signature_block}
              </td></tr>
            </table>

            <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="border-top:1px solid #eeeee8;padding-top:20px;">
              <tr><td>
                <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:11px;font-weight:700;letter-spacing:0.08em;color:#ccc;text-transform:uppercase;margin-bottom:12px;">Session info</div>
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  {_meta_row("IP address", ip)}
                  {_meta_row("Browser", browser)}
                  {visit_time_row}
                  {page_time_row}
                  {active_time_row}
                  {form_time_row}
                  {referrer_row}
                  {page_row}
                </table>
              </td></tr>
            </table>
          </td>
        </tr>
      </table>
    </td></tr>
  </table>
</body>
</html>"""


# ── Sending with retries ─────────────────────────────────────────────────────

async def _send_email(payload: dict, label: str, request_id: str) -> dict:
    if DEV_MODE:
        to = payload.get("to", [])
        subject = payload.get("subject", "(no subject)")
        logger.warning("[DEV] skipping email send — label=%s to=%s subject=%r", label, to, subject)
        return {"id": "dev-mode"}

    last_exc: Exception | None = None

    for attempt in range(1, MAX_SEND_ATTEMPTS + 1):
        started = time.monotonic()
        try:
            result = await asyncio.to_thread(resend.Emails.send, payload)
            elapsed_ms = (time.monotonic() - started) * 1000
            email_id = result.get("id") if isinstance(result, dict) else None
            logger.info(
                "[%s] %s sent to %s (attempt %d/%d, %.0fms, id=%s)",
                request_id, label, payload.get("to"), attempt, MAX_SEND_ATTEMPTS,
                elapsed_ms, email_id or "n/a",
            )
            return result or {}
        except Exception as exc:
            last_exc = exc
            elapsed_ms = (time.monotonic() - started) * 1000
            status = getattr(exc, "status_code", None) or getattr(exc, "code", None)
            non_retryable = (
                isinstance(status, int) and 400 <= status < 500 and status != 429
            )
            logger.warning(
                "[%s] %s send failed (attempt %d/%d, %.0fms): %s: %s (status=%s)",
                request_id, label, attempt, MAX_SEND_ATTEMPTS, elapsed_ms,
                type(exc).__name__, exc, status,
                exc_info=True,
            )
            if non_retryable:
                logger.info(
                    "[%s] %s: non-retryable status %s, aborting retries",
                    request_id, label, status,
                )
                break
            if attempt == MAX_SEND_ATTEMPTS:
                break
            backoff = (2 ** (attempt - 1)) + random.uniform(0, 0.4)
            logger.info("[%s] retrying %s in %.2fs", request_id, label, backoff)
            await asyncio.sleep(backoff)

    assert last_exc is not None
    raise last_exc


def _build_startup_test_submission() -> BookingSubmission:
    now_ms = int(time.time() * 1000)

    sample = BookingSubmission(
        enquiryType="booking",
        fullName="Sarah Thompson",
        email="sarah.thompson@example.com",
        phone="021 555 0142",
        petName="Milo",
        location="Grey Lynn",
        message=(
            "Milo is a 2-year-old cavoodle with good recall and a friendly nature. "
            "He loves other dogs, is comfortable off lead in safe areas, and we are "
            "looking for regular weekday pack walks while we are at work."
        ),
        services=["Pack Walks", "Puppy Visits"],
        formStartedAt=now_ms - (6 * 60 * 1000 + 35 * 1000),
        visitStartedAt=now_ms - (14 * 60 * 1000 + 10 * 1000),
        pageEnteredAt=now_ms - (7 * 60 * 1000 + 5 * 1000),
        firstInteractionAt=now_ms - (5 * 60 * 1000 + 20 * 1000),
        sendClickedAt=now_ms,
        stepChanges=3,
        journey=["/", "/pack-walks", "/our-pricing", "/book"],
        referrer="https://www.google.com/search?q=goodwalk+auckland+dog+walking",
        page="https://www.goodwalk.co.nz/book?service=pack-walks",
    )
    _normalize_submission(sample)
    return sample


async def _send_startup_test_email() -> None:
    if not STARTUP_TEST_RECIPIENT:
        logger.info("Startup test email skipped: OWNER_BCC is not set to a real address")
        return

    request_id = "startup-test"
    sample = _build_startup_test_submission()
    payload = {
        "from": FROM_EMAIL,
        "to": [STARTUP_TEST_RECIPIENT],
        "reply_to": str(sample.email),
        "subject": f"Startup preview — New GoodWalk lead — {sample.fullName} ({sample.petName})",
        "html": owner_email(sample, "127.0.0.1", f"Startup Preview ({APP_VERSION})"),
    }

    await _send_email(payload, label="startup_test_email", request_id=request_id)


# ── Routes ───────────────────────────────────────────────────────────────────

@app.on_event("startup")
async def _startup_mail_check() -> None:
    try:
        await _send_startup_test_email()
    except Exception:
        logger.exception("Startup test email failed")

@app.get("/health")
async def health() -> dict:
    return {"status": "ok"}


def _auth_code_email(email: str, code: str) -> str:
    return f"""<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <title>Your Goodwalk login code</title>
</head>
<body style="margin:0;padding:0;background:#f2f2f0;">
  <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="background:#f2f2f0;padding:40px 16px;">
    <tr><td align="center">
      <table width="480" cellpadding="0" cellspacing="0" role="presentation"
             style="max-width:480px;width:100%;border-radius:16px;overflow:hidden;box-shadow:0 4px 24px rgba(0,0,0,0.08);">
        <tr>
          <td style="background:#213021;padding:32px 40px;text-align:center;">
            <img src="{LOGO_URL}" width="161" height="32" alt="Goodwalk" style="display:inline-block;max-width:161px;height:auto;border:0;">
          </td>
        </tr>
        <tr>
          <td style="background:#ffffff;padding:40px 40px 36px;text-align:center;">
            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:13px;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;color:#888;margin-bottom:16px;">Your login code</div>
            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:52px;font-weight:800;letter-spacing:0.18em;color:#213021;background:#f8f7f4;border-radius:14px;padding:20px 28px;display:inline-block;margin-bottom:24px;">{code}</div>
            <p style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:15px;color:#666;line-height:1.6;margin:0 0 8px;">
              Enter this code on the Goodwalk onboarding page.
            </p>
            <p style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:13px;color:#aaa;margin:0;">
              This code expires in {AUTH_CODE_TTL_SECONDS // 60} minutes. If you didn&rsquo;t request this, you can safely ignore it.
            </p>
          </td>
        </tr>
        <tr>
          <td style="background:#213021;padding:20px 40px;text-align:center;">
            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:12px;color:#5a8a5a;">
              Goodwalk &middot; Auckland, New Zealand
            </div>
          </td>
        </tr>
      </table>
    </td></tr>
  </table>
</body>
</html>"""


_EMAIL_RE = re.compile(r'^[^\s@]+@[^\s@]+\.[^\s@]+$')


@app.post("/auth/request-code")
async def auth_request_code(request: Request):
    request_id = getattr(request.state, "request_id", uuid.uuid4().hex[:8])
    ip = _get_ip(request)
    body = await request.json()
    email = str(body.get("email", "")).strip().lower()

    async with _auth_lock:
        _check_ip_blocked(ip, request_id)

    if not email or not _EMAIL_RE.match(email):
        raise HTTPException(status_code=400, detail="Please enter a valid email address.")

    if email not in _allowed_emails:
        logger.info("[%s] auth: unknown email=%s ip=%s", request_id, email, ip)
        async with _auth_lock:
            _record_auth_failure(ip, request_id, "unknown_email")
        raise HTTPException(
            status_code=403,
            detail="We don’t have your email on file. Please use the address you used when enquiring with Goodwalk, or contact us at info@goodwalk.co.nz.",
        )

    now = time.monotonic()
    async with _auth_lock:
        requests = _code_requests.setdefault(email, deque())
        while requests and now - requests[0] > 3600:
            requests.popleft()
        if len(requests) >= AUTH_CODE_REQUESTS_PER_HOUR:
            raise HTTPException(status_code=429, detail="Too many code requests. Please wait before trying again.")
        requests.append(now)

        code = str(secrets.randbelow(900000) + 100000)
        _pending_codes[email] = {"code": code, "expires_at": time.time() + AUTH_CODE_TTL_SECONDS, "attempts": 0}

    logger.info("[%s] auth: code issued for email=%s", request_id, email)

    if DEV_MODE:
        logger.warning("[DEV] auth code for %s: %s", email, code)
    else:
        await _send_email(
            {"from": FROM_EMAIL, "to": [email], "subject": "Your Goodwalk login code", "html": _auth_code_email(email, code)},
            label="auth_code_email",
            request_id=request_id,
        )

    return {"ok": True}


@app.post("/auth/verify-code")
async def auth_verify_code(request: Request):
    request_id = getattr(request.state, "request_id", uuid.uuid4().hex[:8])
    ip = _get_ip(request)
    body = await request.json()
    email = str(body.get("email", "")).strip().lower()
    code = str(body.get("code", "")).strip()

    async with _auth_lock:
        _check_ip_blocked(ip, request_id)

        pending = _pending_codes.get(email)

        if not pending:
            _record_auth_failure(ip, request_id, "no_pending_code")
            raise HTTPException(status_code=400, detail="No code found for this email. Please request a new one.")

        if time.time() > pending["expires_at"]:
            _pending_codes.pop(email, None)
            _record_auth_failure(ip, request_id, "expired_code")
            raise HTTPException(status_code=400, detail="Your code has expired. Please request a new one.")

        pending["attempts"] += 1
        if pending["attempts"] > AUTH_CODE_MAX_ATTEMPTS:
            _pending_codes.pop(email, None)
            _record_auth_failure(ip, request_id, "max_attempts_exceeded")
            raise HTTPException(status_code=400, detail="Too many incorrect attempts. Please request a new code.")

        if pending["code"] != code:
            remaining = max(0, AUTH_CODE_MAX_ATTEMPTS - pending["attempts"])
            _record_auth_failure(ip, request_id, "wrong_code")
            raise HTTPException(status_code=400, detail=f"Incorrect code. {remaining} attempt{'s' if remaining != 1 else ''} remaining.")

        _pending_codes.pop(email, None)

        token = secrets.token_urlsafe(32)
        _active_sessions[token] = {"email": email, "expires_at": time.time() + AUTH_SESSION_TTL_SECONDS}

    logger.info("[%s] auth: session created for email=%s", request_id, email)
    return {"ok": True, "token": token, "email": email}


@app.get("/auth/verify")
async def auth_verify(request: Request):
    auth_header = request.headers.get("Authorization", "")
    token = auth_header.removeprefix("Bearer ").strip()

    if not token:
        raise HTTPException(status_code=401, detail="No token provided.")

    async with _auth_lock:
        session = _active_sessions.get(token)
        if not session:
            raise HTTPException(status_code=401, detail="Invalid session.")
        if time.time() > session["expires_at"]:
            _active_sessions.pop(token, None)
            raise HTTPException(status_code=401, detail="Session expired. Please sign in again.")

    email = session["email"]
    profile = _client_profiles.get(email, {})
    draft = _drafts.get(email, {})
    return {"ok": True, "email": email, "profile": profile, "draft": draft}


@app.post("/auth/logout")
async def auth_logout(request: Request):
    auth_header = request.headers.get("Authorization", "")
    token = auth_header.removeprefix("Bearer ").strip()
    if token:
        async with _auth_lock:
            _active_sessions.pop(token, None)
    return {"ok": True}


@app.post("/auth/save-draft")
async def auth_save_draft(request: Request):
    auth_header = request.headers.get("Authorization", "")
    token = auth_header.removeprefix("Bearer ").strip()
    if not token:
        raise HTTPException(status_code=401, detail="No token provided.")

    async with _auth_lock:
        session = _active_sessions.get(token)
        if not session or time.time() > session["expires_at"]:
            raise HTTPException(status_code=401, detail="Invalid or expired session.")
        email = session["email"]

    body = await request.json()
    form = str(body.get("form", "")).strip()
    data = body.get("data", {})

    if form not in ("onboarding", "contract"):
        raise HTTPException(status_code=400, detail="form must be 'onboarding' or 'contract'.")
    if not isinstance(data, dict):
        raise HTTPException(status_code=400, detail="data must be an object.")

    async with _auth_lock:
        user_drafts = _drafts.setdefault(email, {})
        user_drafts[form] = data
        snapshot = dict(_drafts)

    await asyncio.to_thread(_save_drafts_sync, snapshot)
    logger.info("Draft saved: email=%s form=%s", email, form)
    return {"ok": True}


@app.post("/submit")
async def submit_booking(data: BookingSubmission, request: Request):
    request_id = getattr(request.state, "request_id", uuid.uuid4().hex[:8])
    ip = _get_ip(request)
    browser = _parse_ua(request.headers.get("user-agent", ""))

    await _enforce_submit_rate_limits(request_id, ip, str(data.email))
    _enforce_form_timing(request_id, data)

    if _is_honeypot_triggered(data):
        logger.warning(
            "[%s] honeypot triggered for ip=%s email=%s page=%r",
            request_id,
            ip,
            data.email,
            data.page,
        )
        return {
            "ok": True,
            "request_id": request_id,
            "ignored": True,
        }

    _validate_submission(request_id, data)
    _normalize_submission(data)

    name_parts = data.fullName.split()
    first_name = name_parts[0] if name_parts else "there"

    logger.info(
        "[%s] /submit: type=%s email=%s ip=%s browser=%r dog=%s services=%s page=%r",
        request_id, data.enquiryType, data.email, ip, browser, data.petName, data.services, data.page,
    )
    logger.debug("[%s] full payload: %s", request_id, data.model_dump())

    failures: list[dict] = []

    client_payload = {
        "from": FROM_EMAIL,
        "to": [data.email],
        "reply_to": REPLY_TO,
        "subject": f"We received your {'general enquiry' if _is_general_enquiry(data) else 'enquiry'}, {first_name}! 🐾",
        "html": client_email(data),
    }
    if CLIENT_BCC:
        client_payload["bcc"] = [CLIENT_BCC]

    try:
        await _send_email(
            client_payload,
            label="client_email",
            request_id=request_id,
        )
    except Exception as exc:
        failures.append({
            "label": "client_email",
            "error_type": type(exc).__name__,
            "error": str(exc),
            "status": getattr(exc, "status_code", None) or getattr(exc, "code", None),
        })

    owner_payload = {
        "from": FROM_EMAIL,
        "to": [OWNER_EMAIL],
        "reply_to": data.email,
        "subject": (
            f"New GoodWalk general enquiry — {data.fullName}"
            if _is_general_enquiry(data)
            else f"New GoodWalk lead — {data.fullName} ({data.petName})"
        ),
        "html": owner_email(data, ip, browser),
    }
    if OWNER_BCC:
        owner_payload["bcc"] = [OWNER_BCC]

    try:
        await _send_email(
            owner_payload,
            label="owner_email",
            request_id=request_id,
        )
    except Exception as exc:
        failures.append({
            "label": "owner_email",
            "error_type": type(exc).__name__,
            "error": str(exc),
            "status": getattr(exc, "status_code", None) or getattr(exc, "code", None),
        })

    if len(failures) == 2:
        logger.error("[%s] both emails failed after retries: %s", request_id, failures)
        raise HTTPException(
            status_code=502,
            detail={
                "request_id": request_id,
                "message": "Both confirmation and notification emails failed to send. Please try again shortly.",
                "failures": failures,
            },
        )

    if failures:
        logger.warning("[%s] partial failure: %s", request_id, failures)

    await _register_email(str(data.email))
    await _store_client_profile(str(data.email), {
        "fullName": data.fullName,
        "phone": data.phone,
        "dogName": data.petName,
    })

    return {
        "ok": True,
        "request_id": request_id,
        "partial_failures": [f["label"] for f in failures],
    }


def _validate_contract_submission(request_id: str, data: ContractSubmission) -> None:
    if not _trimmed(data.fullName):
        raise HTTPException(status_code=400, detail="Please enter your full name.")
    if not _trimmed(data.phone):
        raise HTTPException(status_code=400, detail="Please enter your phone number.")
    for field_name, message in {
        "address": "Please enter your address.",
        "dogName": "Please enter your dog's name.",
        "dogBreed": "Please enter your dog's breed.",
        "serviceType": "Please select a service type.",
        "startDate": "Please enter a start date.",
    }.items():
        if not _trimmed(getattr(data, field_name)):
            logger.warning("[%s] contract rejected: missing %s", request_id, field_name)
            raise HTTPException(status_code=400, detail=message)

    if not all([data.agreeServiceTerms, data.agreeCancellation, data.agreePayment,
                data.agreeEmergency, data.agreeLiability, data.agreeAccuracy]):
        logger.warning("[%s] contract rejected: incomplete declarations", request_id)
        raise HTTPException(status_code=400, detail="Please confirm all declarations before signing.")

    signature = _trimmed(data.signatureDataUrl)
    if not signature.startswith("data:image/png;base64,") or len(signature) < 128:
        logger.warning("[%s] contract rejected: invalid signature payload", request_id)
        raise HTTPException(status_code=400, detail="Please add your signature before sending.")


def _normalize_contract_submission(data: ContractSubmission) -> None:
    data.fullName = _trimmed(data.fullName)
    data.phone = _trimmed(data.phone)
    data.address = _trimmed(data.address)
    data.dogName = _trimmed(data.dogName)
    data.dogBreed = _trimmed(data.dogBreed)
    data.dogAge = _trimmed(data.dogAge)
    data.serviceType = _trimmed(data.serviceType)
    data.startDate = _trimmed(data.startDate)
    data.walkFrequency = _trimmed(data.walkFrequency)
    data.additionalNotes = _trimmed(data.additionalNotes)
    data.referrer = _trimmed(data.referrer)
    data.page = _trimmed(data.page)

    for field_name in ("visitStartedAt", "pageEnteredAt", "firstInteractionAt", "sendClickedAt"):
        value = getattr(data, field_name)
        if value is None or value <= 0:
            setattr(data, field_name, None)


def owner_contract_email(data: ContractSubmission, ip: str, browser: str) -> str:
    submitted_at = datetime.now().strftime("%d %b %Y at %I:%M %p").lstrip("0")
    visit_time_row = _meta_row("Time on site", _duration_between(data.visitStartedAt, data.sendClickedAt))
    form_time_row = _meta_row("Form open time", _duration_between(data.formStartedAt, data.sendClickedAt))
    referrer_row = _meta_row("Came from", data.referrer) if data.referrer else _meta_row("Came from", "Direct / bookmark")
    page_row = _meta_row("Page", data.page) if data.page else ""

    notes_block = f"""
      <tr>
        <td colspan="2" style="padding:16px 0 0;">
          <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                      font-size:11px;font-weight:700;letter-spacing:0.08em;color:#888;
                      text-transform:uppercase;margin-bottom:8px;">Additional notes</div>
          <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                      font-size:14px;color:#444;line-height:1.6;background:#f0efe9;
                      border-radius:8px;padding:14px 16px;">{data.additionalNotes}</div>
        </td>
      </tr>""" if data.additionalNotes else ""

    signature_block = f"""
      <div style="margin-top:16px;border-radius:16px;background:#ffffff;border:1px solid #e3e3db;padding:14px 14px 10px;">
        <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                    font-size:11px;font-weight:700;letter-spacing:0.1em;color:#888;
                    text-transform:uppercase;margin-bottom:10px;">Captured signature</div>
        <img src="{data.signatureDataUrl}" alt="Client signature" style="display:block;max-width:100%;height:auto;border-radius:10px;background:#fff;">
      </div>"""

    badge = f"""<div style="display:inline-block;background:#FFD100;border-radius:100px;
                            padding:10px 28px;">
                 <span style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                              font-size:18px;font-weight:700;color:#213021;">
                   &#x1F4DC;&nbsp; New signed contract
                 </span>
               </div>
               <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
                           font-size:12px;color:#5a8a5a;margin-top:12px;">
                 Submitted {submitted_at}
               </div>"""

    return f"""<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <title>New GoodWalk service contract</title>
</head>
<body style="margin:0;padding:0;background:#f2f2f0;">
  <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="background:#f2f2f0;padding:40px 16px;">
    <tr><td align="center">
      <table width="680" cellpadding="0" cellspacing="0" role="presentation"
             style="max-width:680px;width:100%;border-radius:16px;overflow:hidden;box-shadow:0 4px 24px rgba(0,0,0,0.08);">

        {_logo_header(badge_html=badge, subtitle="Signed service agreement")}

        <tr>
          <td style="background:#ffffff;padding:38px 40px 34px;">
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation"
                   style="background:#213021;border-radius:12px;margin-bottom:26px;">
              <tr>
                <td style="padding:22px 24px;">
                  <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:11px;font-weight:700;letter-spacing:0.1em;color:#7aaa7a;text-transform:uppercase;margin-bottom:10px;">
                    Quick contact
                  </div>
                  <div style="margin-bottom:10px;">
                    <a href="mailto:{data.email}" style="display:inline-block;background:#ffffff;color:#213021;text-decoration:none;border-radius:10px;padding:12px 14px;border:1px solid #d9dfd9;font-family:Menlo,Consolas,'SFMono-Regular',monospace;font-size:18px;font-weight:700;">{data.email}</a>
                  </div>
                  <a href="tel:{data.phone}" style="display:inline-block;background:#ffd100;color:#213021;text-decoration:none;border-radius:999px;padding:10px 16px;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:14px;font-weight:700;">Call {data.phone}</a>
                </td>
              </tr>
            </table>

            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:11px;font-weight:700;letter-spacing:0.1em;color:#888;text-transform:uppercase;margin-bottom:16px;">Client details</div>
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="background:#f8f7f4;border-radius:12px;margin-bottom:24px;">
              <tr><td style="padding:24px 28px;">
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  {_detail_row("Name", data.fullName)}
                  {_detail_row("Email", str(data.email))}
                  {_detail_row("Phone", data.phone)}
                  {_detail_row("Address", data.address)}
                </table>
              </td></tr>
            </table>

            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:11px;font-weight:700;letter-spacing:0.1em;color:#888;text-transform:uppercase;margin-bottom:16px;">Service agreement</div>
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="background:#f8f7f4;border-radius:12px;margin-bottom:24px;">
              <tr><td style="padding:24px 28px;">
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  {_detail_row("Dog", data.dogName)}
                  {_detail_row("Breed", data.dogBreed)}
                  {_detail_row("Age", data.dogAge or "—")}
                  {_detail_row("Service", data.serviceType)}
                  {_detail_row("Start date", data.startDate)}
                  {_detail_row("Frequency", data.walkFrequency or "—")}
                  {notes_block}
                </table>
              </td></tr>
            </table>

            <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:11px;font-weight:700;letter-spacing:0.1em;color:#888;text-transform:uppercase;margin-bottom:16px;">Declarations confirmed</div>
            <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="background:#f8f7f4;border-radius:12px;margin-bottom:24px;">
              <tr><td style="padding:24px 28px;">
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  {_detail_row("Service terms", "Confirmed")}
                  {_detail_row("Cancellation policy", "Confirmed")}
                  {_detail_row("Payment terms", "Confirmed")}
                  {_detail_row("Emergency consent", "Confirmed")}
                  {_detail_row("Liability terms", "Confirmed")}
                  {_detail_row("Accuracy declaration", "Confirmed")}
                </table>
                {signature_block}
              </td></tr>
            </table>

            <table width="100%" cellpadding="0" cellspacing="0" role="presentation" style="border-top:1px solid #eeeee8;padding-top:20px;">
              <tr><td>
                <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:11px;font-weight:700;letter-spacing:0.08em;color:#ccc;text-transform:uppercase;margin-bottom:12px;">Session info</div>
                <table width="100%" cellpadding="0" cellspacing="0" role="presentation">
                  {_meta_row("IP address", ip)}
                  {_meta_row("Browser", browser)}
                  {visit_time_row}
                  {form_time_row}
                  {referrer_row}
                  {page_row}
                </table>
              </td></tr>
            </table>
          </td>
        </tr>
      </table>
    </td></tr>
  </table>
</body>
</html>"""


@app.post("/onboarding-submit")
async def submit_onboarding(data: OnboardingSubmission, request: Request):
    request_id = getattr(request.state, "request_id", uuid.uuid4().hex[:8])
    ip = _get_ip(request)
    browser = _parse_ua(request.headers.get("user-agent", ""))

    await _enforce_submit_rate_limits(request_id, ip, str(data.email))
    _enforce_form_timing(request_id, data)

    if _is_honeypot_triggered(data):
        logger.warning(
            "[%s] onboarding honeypot triggered for ip=%s email=%s page=%r",
            request_id,
            ip,
            data.email,
            data.page,
        )
        return {
            "ok": True,
            "request_id": request_id,
            "ignored": True,
        }

    _validate_onboarding_submission(request_id, data)
    _normalize_onboarding_submission(data)

    logger.info(
        "[%s] /onboarding-submit: email=%s ip=%s browser=%r dog=%s services=%s page=%r",
        request_id, data.email, ip, browser, data.dogName, data.servicesNeeded, data.page,
    )
    logger.debug("[%s] onboarding payload: %s", request_id, data.model_dump())

    owner_payload = {
        "from": FROM_EMAIL,
        "to": [OWNER_EMAIL],
        "reply_to": data.email,
        "subject": f"New GoodWalk onboarding — {data.fullName} ({data.dogName})",
        "html": owner_onboarding_email(data, ip, browser),
    }
    if OWNER_BCC:
        owner_payload["bcc"] = [OWNER_BCC]

    try:
        await _send_email(
            owner_payload,
            label="owner_onboarding_email",
            request_id=request_id,
        )
    except Exception as exc:
        logger.error("[%s] onboarding email failed after retries: %s", request_id, exc, exc_info=True)
        raise HTTPException(
            status_code=502,
            detail={
                "request_id": request_id,
                "message": "The onboarding form could not be delivered. Please try again shortly.",
                "error_type": type(exc).__name__,
            },
        )

    await _register_email(str(data.email))
    await _store_client_profile(str(data.email), {
        "fullName": data.fullName,
        "phone": data.phone,
        "address": data.address,
        "dogName": data.dogName,
        "dogBreed": data.dogBreed,
        "dogAge": data.dogAge,
        "onboardingCompleted": True,
    })

    return {
        "ok": True,
        "request_id": request_id,
    }


@app.post("/contract-submit")
async def submit_contract(data: ContractSubmission, request: Request):
    request_id = getattr(request.state, "request_id", uuid.uuid4().hex[:8])
    ip = _get_ip(request)
    browser = _parse_ua(request.headers.get("user-agent", ""))

    await _enforce_submit_rate_limits(request_id, ip, str(data.email))
    _enforce_form_timing(request_id, data)

    if _is_honeypot_triggered(data):
        logger.warning(
            "[%s] contract honeypot triggered for ip=%s email=%s page=%r",
            request_id, ip, data.email, data.page,
        )
        return {"ok": True, "request_id": request_id, "ignored": True}

    _validate_contract_submission(request_id, data)
    _normalize_contract_submission(data)

    logger.info(
        "[%s] /contract-submit: email=%s ip=%s browser=%r dog=%s service=%s page=%r",
        request_id, data.email, ip, browser, data.dogName, data.serviceType, data.page,
    )

    owner_payload = {
        "from": FROM_EMAIL,
        "to": [OWNER_EMAIL],
        "reply_to": data.email,
        "subject": f"New GoodWalk contract — {data.fullName} ({data.dogName}, {data.serviceType})",
        "html": owner_contract_email(data, ip, browser),
    }
    if OWNER_BCC:
        owner_payload["bcc"] = [OWNER_BCC]

    try:
        await _send_email(owner_payload, label="owner_contract_email", request_id=request_id)
    except Exception as exc:
        logger.error("[%s] contract email failed after retries: %s", request_id, exc, exc_info=True)
        raise HTTPException(
            status_code=502,
            detail={
                "request_id": request_id,
                "message": "The contract could not be delivered. Please try again shortly.",
                "error_type": type(exc).__name__,
            },
        )

    await _register_email(str(data.email))
    await _store_client_profile(str(data.email), {
        "fullName": data.fullName,
        "phone": data.phone,
        "address": data.address,
        "dogName": data.dogName,
        "dogBreed": data.dogBreed,
        "dogAge": data.dogAge,
        "contractCompleted": True,
    })

    return {"ok": True, "request_id": request_id}
