package server

import (
	"fmt"
	"io"
	"net/http"
	"os"
	"path/filepath"
	"polaris/db"
	"polaris/ent"
	"polaris/ent/media"
	"polaris/log"
	"strconv"

	tmdb "github.com/cyruzin/golang-tmdb"
	"github.com/gin-gonic/gin"
	"github.com/pkg/errors"
)

type searchTvParam struct {
	Query string `form:"query"`
}

func (s *Server) SearchTvSeries(c *gin.Context) (interface{}, error) {
	var q searchTvParam
	if err := c.ShouldBindQuery(&q); err != nil {
		return nil, errors.Wrap(err, "bind query")
	}
	log.Infof("search tv series with keyword: %v", q.Query)
	r, err := s.MustTMDB().SearchTvShow(q.Query, "")
	if err != nil {
		return nil, errors.Wrap(err, "search tv")
	}
	return r, nil
}

func(s *Server) SearchMedia(c *gin.Context) (interface{}, error) {
	var q searchTvParam
	if err := c.ShouldBindQuery(&q); err != nil {
		return nil, errors.Wrap(err, "bind query")
	}
	log.Infof("search media with keyword: %v", q.Query)
	r, err := s.MustTMDB().SearchMedia(q.Query, s.language, 1)
	if err != nil {
		return nil, errors.Wrap(err, "search tv")
	}
	return r, nil

}

type addWatchlistIn struct {
	TmdbID     int               `json:"tmdb_id" binding:"required"`
	StorageID  int               `json:"storage_id" `
	Resolution string `json:"resolution" binding:"required"`
}

func (s *Server) AddTv2Watchlist(c *gin.Context) (interface{}, error) {
	var in addWatchlistIn
	if err := c.ShouldBindJSON(&in); err != nil {
		return nil, errors.Wrap(err, "bind query")
	}
	detailCn, err := s.MustTMDB().GetTvDetails(in.TmdbID, db.LanguageCN)
	if err != nil {
		return nil, errors.Wrap(err, "get tv detail")
	}
	var nameCn = detailCn.Name

	detailEn, _ := s.MustTMDB().GetTvDetails(in.TmdbID, db.LanguageEN)
	var nameEn = detailEn.Name
	var detail *tmdb.TVDetails
	if s.language == "" || s.language == db.LanguageCN {
		detail = detailCn
	} else {
		detail = detailEn
	}
	log.Infof("find detail for tv id %d: %v", in.TmdbID, detail)

	var epIds []int
	for _, season := range detail.Seasons {
		seasonId := season.SeasonNumber
		se, err := s.MustTMDB().GetSeasonDetails(int(detail.ID), seasonId, s.language)
		if err != nil {
			log.Errorf("get season detail (%s) error: %v", detail.Name, err)
			continue
		}
		for _, ep := range se.Episodes {
			epid, err := s.db.SaveEposideDetail(&ent.Episode{
				SeasonNumber:  seasonId,
				EpisodeNumber: ep.EpisodeNumber,
				Title:         ep.Name,
				Overview:      ep.Overview,
				AirDate:       ep.AirDate,
			})
			if err != nil {
				log.Errorf("save episode info error: %v", err)
				continue
			}
			epIds = append(epIds, epid)
		}
	}
	r, err := s.db.AddMediaWatchlist(&ent.Media{
		TmdbID: int(detail.ID),
		MediaType: media.MediaTypeTv,
		NameCn: nameCn,
		NameEn: nameEn,
		OriginalName: detail.OriginalName,
		Overview: detail.Overview,
		AirDate: detail.FirstAirDate,
		Resolution: string(in.Resolution),
		StorageID: in.StorageID,

	}, epIds)
	if err != nil {
		return nil, errors.Wrap(err, "add to list")
	}
	go func() {
		if err := s.downloadPoster(detail.PosterPath, r.ID); err != nil {
			log.Errorf("download poster error: %v", err)
		}
		if err := s.downloadBackdrop(detail.BackdropPath, r.ID,); err != nil {
			log.Errorf("download poster error: %v", err)
		}

	}()

	log.Infof("add tv %s to watchlist success", detail.Name)
	return nil, nil
}

func (s *Server) AddMovie2Watchlist(c *gin.Context) (interface{}, error) {
	var in addWatchlistIn
	if err := c.ShouldBindJSON(&in); err != nil {
		return nil, errors.Wrap(err, "bind query")
	}
	detailCn, err := s.MustTMDB().GetMovieDetails(in.TmdbID, db.LanguageCN)
	if err != nil {
		return nil, errors.Wrap(err, "get movie detail")
	}
	var nameCn = detailCn.Title

	detailEn, _ := s.MustTMDB().GetMovieDetails(in.TmdbID, db.LanguageEN)
	var nameEn = detailEn.Title
	var detail *tmdb.MovieDetails
	if s.language == "" || s.language == db.LanguageCN {
		detail = detailCn
	} else {
		detail = detailEn
	}
	log.Infof("find detail for movie id %d: %v", in.TmdbID, detail)


	r, err := s.db.AddMediaWatchlist(&ent.Media{
		TmdbID: int(detail.ID),
		MediaType: media.MediaTypeMovie,
		NameCn: nameCn,
		NameEn: nameEn,
		OriginalName: detail.OriginalTitle,
		Overview: detail.Overview,
		AirDate: detail.ReleaseDate,
		Resolution: string(in.Resolution),
		StorageID: in.StorageID,

	}, nil)
	if err != nil {
		return nil, errors.Wrap(err, "add to list")
	}
	go func() {
		if err := s.downloadPoster(detail.PosterPath, r.ID); err != nil {
			log.Errorf("download poster error: %v", err)
		}
		if err := s.downloadBackdrop(detail.BackdropPath, r.ID); err != nil {
			log.Errorf("download backdrop error: %v", err)
		}
	}()

	log.Infof("add movie %s to watchlist success", detail.Title)
	return nil, nil

}

func (s *Server) downloadBackdrop(path string, mediaID int) error {
	url := "https://image.tmdb.org/t/p/original" + path
	return s.downloadImage(url, mediaID, "backdrop.jpg")
}

func (s *Server) downloadPoster(path string, mediaID int) error {
	var url = "https://image.tmdb.org/t/p/original" + path

	return s.downloadImage(url, mediaID, "poster.jpg")
}

func (s *Server) downloadImage(url string, mediaID int, name string) error {

	log.Infof("try to download image: %v", url)
	var resp, err = http.Get(url)
	if err != nil {
		return errors.Wrap(err, "http get")
	}
	targetDir := fmt.Sprintf("%v/%d", db.ImgPath, mediaID)
	os.MkdirAll(targetDir, 0777)
	//ext := filepath.Ext(path)
	targetFile := filepath.Join(targetDir, name)
	f, err := os.Create(targetFile)
	if err != nil {
		return errors.Wrap(err, "new file")
	}
	defer f.Close()
	_, err = io.Copy(f, resp.Body)
	if err != nil {
		return errors.Wrap(err, "copy http response")
	}
	log.Infof("image successfully downlaoded: %v", targetFile)
	return nil

}

func (s *Server) GetTvWatchlist(c *gin.Context) (interface{}, error) {
	list := s.db.GetMediaWatchlist(media.MediaTypeTv)
	return list, nil
}

func (s *Server) GetMovieWatchlist(c *gin.Context) (interface{}, error) {
	list := s.db.GetMediaWatchlist(media.MediaTypeMovie)
	return list, nil
}


func (s *Server) GetMediaDetails(c *gin.Context) (interface{}, error) {
	ids := c.Param("id")
	id, err := strconv.Atoi(ids)
	if err != nil {
		return nil, errors.Wrap(err, "convert")
	}
	detail := s.db.GetMediaDetails(id)
	return detail, nil
}

func (s *Server) GetAvailableResolutions(c *gin.Context) (interface{}, error) {
	return []db.ResolutionType{
		db.R720p,
		db.R1080p,
		db.R4k,
	}, nil
}

func (s *Server) DeleteFromWatchlist(c *gin.Context) (interface{}, error) {
	ids := c.Param("id")
	id, err := strconv.Atoi(ids)
	if err != nil {
		return nil, errors.Wrap(err, "convert")
	}
	if err := s.db.DeleteMedia(id); err != nil {
		return nil, errors.Wrap(err, "delete db")
	}
	os.RemoveAll(filepath.Join(db.ImgPath, ids)) //delete image related
	return "success", nil
}