package api

import (
	"context"
	"encoding/json"
	"net/http"
	"strings"

	"github.com/ponzischeme89/memby/server/internal/store"
)

type sonarrProfileOption struct {
	ID          int    `json:"id"`
	Name        string `json:"name"`
	Recommended bool   `json:"recommended"`
}

type sonarrRequestAdminPolicy struct {
	QualityProfileID  int                   `json:"qualityProfileId"`
	SearchImmediately bool                  `json:"searchImmediately"`
	Profiles          []sonarrProfileOption `json:"profiles"`
	RecommendedID     int                   `json:"recommendedId"`
	Configured        bool                  `json:"configured"`
	Error             string                `json:"error,omitempty"`
}

func (s *Server) sonarrRequestAdminPolicy(ctx context.Context) sonarrRequestAdminPolicy {
	policy, err := s.store.SonarrRequestPolicy(ctx)
	if err != nil {
		return sonarrRequestAdminPolicy{Profiles: []sonarrProfileOption{}, Error: "Could not read the Sonarr request policy."}
	}
	result := sonarrRequestAdminPolicy{QualityProfileID: policy.QualityProfileID, SearchImmediately: policy.SearchImmediately, Profiles: []sonarrProfileOption{}}
	if s.sonarr == nil {
		result.Error = "Sonarr is not configured."
		return result
	}
	profiles, err := s.sonarr.QualityProfiles(ctx)
	if err != nil {
		result.Error = "Could not read Sonarr quality profiles."
		return result
	}
	for _, profile := range profiles {
		recommended := is720pProfile(profile.Name)
		if recommended && result.RecommendedID == 0 {
			result.RecommendedID = profile.ID
		}
		if profile.ID == policy.QualityProfileID {
			result.Configured = true
		}
		result.Profiles = append(result.Profiles, sonarrProfileOption{ID: profile.ID, Name: profile.Name, Recommended: recommended})
	}
	if policy.QualityProfileID == 0 && result.RecommendedID != 0 {
		result.QualityProfileID = result.RecommendedID
		result.Configured = true
	}
	if !result.Configured && result.Error == "" {
		result.Error = "Choose an existing Sonarr quality profile before accepting TV requests."
	}
	return result
}

type sonarrRequestPolicyRequest struct {
	QualityProfileID  int  `json:"qualityProfileId"`
	SearchImmediately bool `json:"searchImmediately"`
}

func (s *Server) handleAdminSonarrRequestPolicy(w http.ResponseWriter, r *http.Request) {
	if r.Method == http.MethodGet {
		writeJSON(w, http.StatusOK, s.sonarrRequestAdminPolicy(r.Context()))
		return
	}
	if s.sonarr == nil {
		writeError(w, http.StatusServiceUnavailable, "Sonarr is not configured")
		return
	}
	var req sonarrRequestPolicyRequest
	if err := json.NewDecoder(http.MaxBytesReader(w, r.Body, 4<<10)).Decode(&req); err != nil {
		writeError(w, http.StatusBadRequest, "malformed request body")
		return
	}
	if req.QualityProfileID <= 0 {
		writeError(w, http.StatusBadRequest, "choose a Sonarr quality profile")
		return
	}
	profiles, err := s.sonarr.QualityProfiles(r.Context())
	if err != nil {
		writeError(w, http.StatusBadGateway, "could not validate Sonarr quality profiles")
		return
	}
	found := false
	for _, profile := range profiles {
		if profile.ID == req.QualityProfileID {
			found = true
			break
		}
	}
	if !found {
		writeError(w, http.StatusBadRequest, "the selected Sonarr quality profile no longer exists")
		return
	}
	if err := s.store.SetSonarrRequestPolicy(r.Context(), store.SonarrRequestPolicy{QualityProfileID: req.QualityProfileID, SearchImmediately: req.SearchImmediately}); err != nil {
		s.loggerFor(r.Context()).Error("Sonarr request policy write failed", "error", err)
		writeError(w, http.StatusInternalServerError, "could not save Sonarr request policy")
		return
	}
	s.loggerFor(r.Context()).Info("Sonarr request policy changed", "quality_profile_id", req.QualityProfileID, "search_immediately", req.SearchImmediately)
	writeJSON(w, http.StatusOK, s.sonarrRequestAdminPolicy(r.Context()))
}

func is720pProfile(name string) bool { return strings.EqualFold(strings.TrimSpace(name), "720p") }