package services

import (
	"fmt"
	"go.mongodb.org/mongo-driver/mongo"

	"neomovies-api/pkg/models"
)

type TVService struct {
	db        *mongo.Database
	tmdb      *TMDBService
	kpService *KinopoiskService
}

func NewTVService(db *mongo.Database, tmdb *TMDBService, kpService *KinopoiskService) *TVService {
	return &TVService{
		db:        db,
		tmdb:      tmdb,
		kpService: kpService,
	}
}

func (s *TVService) Search(query string, page int, language string, year int) (*models.TMDBTVResponse, error) {
	return s.tmdb.SearchTVShows(query, page, language, year)
}

func (s *TVService) GetByID(id int, language string, idType string) (*models.TVShow, error) {
    // Строго уважаем явный id_type, без скрытого fallback на TMDB
    switch idType {
    case "kp":
        if s.kpService == nil {
            return nil, fmt.Errorf("kinopoisk service not configured")
        }

        // Сначала пробуем как Kinopoisk ID
        if kpFilm, err := s.kpService.GetFilmByKinopoiskId(id); err == nil && kpFilm != nil {
            return MapKPFilmToTVShow(kpFilm), nil
        }

        // Возможно пришел TMDB ID — пробуем конвертировать TMDB -> KP
        if kpId, convErr := TmdbIdToKPId(s.tmdb, s.kpService, id); convErr == nil {
            if kpFilm, err := s.kpService.GetFilmByKinopoiskId(kpId); err == nil && kpFilm != nil {
                return MapKPFilmToTVShow(kpFilm), nil
            }
        }
        // Явно указан KP, но ничего не нашли — возвращаем ошибку
        return nil, fmt.Errorf("TV show not found in Kinopoisk with id %d", id)

    case "tmdb":
        return s.tmdb.GetTVShow(id, language)
    }

    // Если id_type не указан — старая логика по языку
    if ShouldUseKinopoisk(language) && s.kpService != nil {
        if kpFilm, err := s.kpService.GetFilmByKinopoiskId(id); err == nil && kpFilm != nil {
            return MapKPFilmToTVShow(kpFilm), nil
        }
    }

    return s.tmdb.GetTVShow(id, language)
}

func (s *TVService) GetPopular(page int, language string) (*models.TMDBTVResponse, error) {
	return s.tmdb.GetPopularTVShows(page, language)
}

func (s *TVService) GetTopRated(page int, language string) (*models.TMDBTVResponse, error) {
	return s.tmdb.GetTopRatedTVShows(page, language)
}

func (s *TVService) GetOnTheAir(page int, language string) (*models.TMDBTVResponse, error) {
	return s.tmdb.GetOnTheAirTVShows(page, language)
}

func (s *TVService) GetAiringToday(page int, language string) (*models.TMDBTVResponse, error) {
	return s.tmdb.GetAiringTodayTVShows(page, language)
}

func (s *TVService) GetRecommendations(id, page int, language string) (*models.TMDBTVResponse, error) {
	return s.tmdb.GetTVRecommendations(id, page, language)
}

func (s *TVService) GetSimilar(id, page int, language string) (*models.TMDBTVResponse, error) {
	return s.tmdb.GetSimilarTVShows(id, page, language)
}

func (s *TVService) GetExternalIDs(id int) (*models.ExternalIDs, error) {
	return s.tmdb.GetTVExternalIDs(id)
}