from datetime import datetime

from pydantic import BaseModel, ConfigDict, Field


class EditorProductRow(BaseModel):
    id: int
    tenant_id: str
    client_name: str
    item_id: str | None
    name: str
    mix_id: int
    mix_client_name: str
    mix_name: str
    sale_type: str
    unit_of_measure: str
    visible: bool
    product_notes: str | None
    mix_notes: str | None


class EditorProductUpdate(BaseModel):
    model_config = ConfigDict(extra="forbid")

    client_name: str | None = Field(default=None, min_length=1, max_length=255)
    name: str | None = Field(default=None, min_length=1, max_length=255)
    item_id: str | None = Field(default=None, max_length=128)
    mix_id: int | None = None
    sale_type: str | None = Field(default=None, min_length=1, max_length=64)
    unit_of_measure: str | None = Field(default=None, min_length=1, max_length=64)
    visible: bool | None = None
    notes: str | None = Field(default=None, max_length=2000)


class EditorMixUpdate(BaseModel):
    model_config = ConfigDict(extra="forbid")

    client_name: str | None = Field(default=None, min_length=1, max_length=255)
    name: str | None = Field(default=None, min_length=1, max_length=255)
    notes: str | None = Field(default=None, max_length=2000)
    # Toggling a mix's status fans out to the visibility of every product under it.
    visible: bool | None = None


class EditorMixRow(BaseModel):
    id: int
    tenant_id: str
    client_name: str
    name: str
    # A mix reads as "Active" when at least one of its products is visible.
    visible: bool
    product_count: int
    visible_product_count: int
    notes: str | None


class EditorMixIngredientRead(BaseModel):
    id: int
    raw_material_id: int
    raw_material_name: str
    quantity_kg: float
    notes: str | None


class EditorMixFormulaRead(BaseModel):
    id: int
    tenant_id: str
    client_name: str
    name: str
    ingredients: list[EditorMixIngredientRead]
    total_kg: float


class EditorMixIngredientCreate(BaseModel):
    model_config = ConfigDict(extra="forbid")

    raw_material_id: int
    quantity_kg: float = Field(gt=0)
    notes: str | None = Field(default=None, max_length=1000)


class EditorMixIngredientUpdate(BaseModel):
    model_config = ConfigDict(extra="forbid")

    quantity_kg: float | None = Field(default=None, gt=0)
    notes: str | None = Field(default=None, max_length=1000)


class EditorProductIngredientCreate(BaseModel):
    model_config = ConfigDict(extra="forbid")

    raw_material_id: int
    quantity_kg: float = Field(gt=0)
    notes: str | None = Field(default=None, max_length=1000)


class EditorProductIngredientUpdate(BaseModel):
    model_config = ConfigDict(extra="forbid")

    quantity_kg: float | None = Field(default=None, gt=0)
    notes: str | None = Field(default=None, max_length=1000)


class EditorProductIngredientRead(BaseModel):
    id: int
    raw_material_id: int
    raw_material_name: str
    quantity_kg: float
    sort_order: int
    notes: str | None


class EditorProductFormulaRead(BaseModel):
    id: int
    tenant_id: str
    client_name: str
    name: str
    mix_id: int
    mix_name: str
    ingredients: list[EditorProductIngredientRead]
    total_kg: float


# --- Ingredients (raw materials) catalogue -----------------------------------


class EditorIngredientRow(BaseModel):
    id: int
    name: str
    supplier: str | None
    unit_of_measure: str
    kg_per_unit: float
    status: str
    # Decimal places this ingredient is rounded to in the mix calculator output.
    rounding_decimals: int
    notes: str | None
    cost_per_kg: float | None
    # How many product/mix formulas currently reference this ingredient.
    usage_count: int
    created_at: datetime


class EditorIngredientCreate(BaseModel):
    model_config = ConfigDict(extra="forbid")

    name: str = Field(min_length=1, max_length=255)
    supplier: str | None = Field(default=None, max_length=255)
    unit_of_measure: str = Field(min_length=1, max_length=64)
    kg_per_unit: float = Field(gt=0)
    status: str = Field(default="active", max_length=32)
    rounding_decimals: int = Field(default=2, ge=0, le=6)
    notes: str | None = Field(default=None, max_length=2000)


class EditorIngredientUpdate(BaseModel):
    model_config = ConfigDict(extra="forbid")

    name: str | None = Field(default=None, min_length=1, max_length=255)
    supplier: str | None = Field(default=None, max_length=255)
    unit_of_measure: str | None = Field(default=None, min_length=1, max_length=64)
    kg_per_unit: float | None = Field(default=None, gt=0)
    status: str | None = Field(default=None, max_length=32)
    rounding_decimals: int | None = Field(default=None, ge=0, le=6)
    notes: str | None = Field(default=None, max_length=2000)