package tmdb

import (
	"errors"
	"fmt"
	"math/rand/v2"
	"os"
	"strconv"

	sdk "github.com/cyruzin/golang-tmdb"
)

var ErrMissingKey = errors.New("missing TMDB key")

func FetchMovieDetails(inf Info) (*sdk.MovieDetails, error) {
	if inf.Type != Movie {
		return nil, fmt.Errorf("%s is not a movie", inf.Type)
	}
	if inf.ID < 1 {
		return nil, fmt.Errorf("%d is not a valid TMDB id", inf.ID)
	}

	sdk, err := GetClient()
	if err != nil {
		return nil, err
	}

	return sdk.GetMovieDetails(inf.ID, map[string]string{
		"cache": strconv.Itoa(rand.Int()),
	})
}

func FetchEpisodeDetails(inf Info) (TVDetails, error) {
	var det TVDetails
	if inf.Type != Series {
		return det, fmt.Errorf("%s is not an episode", inf.Type)
	}
	if inf.ID < 1 {
		return det, fmt.Errorf("%d is not a valid TMDB id", inf.ID)
	}
	if inf.Season < 1 {
		return det, fmt.Errorf("%d is not a valid season", inf.Season)
	}
	if inf.Episode < 1 {
		return det, fmt.Errorf("%d is not a valid episode", inf.Episode)
	}

	sdk, err := GetClient()
	if err != nil {
		return det, err
	}

	epDet, err := sdk.GetTVEpisodeDetails(inf.ID, inf.Season, inf.Episode, map[string]string{
		"cache": strconv.Itoa(rand.Int()),
	})
	if err != nil {
		return det, err
	}

	showDet, err := sdk.GetTVDetails(inf.ID, map[string]string{
		"cache": strconv.Itoa(rand.Int()),
	})
	if err != nil {
		return det, err
	}

	det.Episode = epDet
	det.Series = showDet

	return det, nil
}

func GetClient() (*sdk.Client, error) {
	key := os.Getenv("TMDB_KEY")
	if key == "" {
		return nil, ErrMissingKey
	}
	return sdk.Init(key)
}