package utils

import (
	"github.com/ByteDream/crunchyroll-go"
	"sort"
	"strconv"
	"strings"
)

// SortEpisodesBySeason sorts the given episodes by their seasons.
// Note that the same episodes just with different audio locales will cause problems
func SortEpisodesBySeason(episodes []*crunchyroll.Episode) [][]*crunchyroll.Episode {
	sortMap := map[string]map[int][]*crunchyroll.Episode{}

	for _, episode := range episodes {
		if _, ok := sortMap[episode.SeriesID]; !ok {
			sortMap[episode.SeriesID] = map[int][]*crunchyroll.Episode{}
		}
		if _, ok := sortMap[episode.SeriesID][episode.SeasonNumber]; !ok {
			sortMap[episode.SeriesID][episode.SeasonNumber] = make([]*crunchyroll.Episode, 0)
		}
		sortMap[episode.SeriesID][episode.SeasonNumber] = append(sortMap[episode.SeriesID][episode.SeasonNumber], episode)
	}

	var eps [][]*crunchyroll.Episode
	for _, series := range sortMap {
		keys := make([]int, len(series))
		for seriesNumber := range series {
			keys = append(keys, seriesNumber)
		}
		sort.Ints(keys)

		for _, key := range keys {
			es := series[key]
			if len(es) > 0 {
				sort.Sort(EpisodesByNumber(es))
				eps = append(eps, es)
			}
		}
	}

	return eps
}

// MovieListingsByDuration sorts movie listings by their duration
type MovieListingsByDuration []*crunchyroll.MovieListing

func (mlbd MovieListingsByDuration) Len() int {
	return len(mlbd)
}
func (mlbd MovieListingsByDuration) Swap(i, j int) {
	mlbd[i], mlbd[j] = mlbd[j], mlbd[i]
}
func (mlbd MovieListingsByDuration) Less(i, j int) bool {
	return mlbd[i].DurationMS < mlbd[j].DurationMS
}

// EpisodesByDuration sorts episodes by their duration
type EpisodesByDuration []*crunchyroll.Episode

func (ebd EpisodesByDuration) Len() int {
	return len(ebd)
}
func (ebd EpisodesByDuration) Swap(i, j int) {
	ebd[i], ebd[j] = ebd[j], ebd[i]
}
func (ebd EpisodesByDuration) Less(i, j int) bool {
	return ebd[i].DurationMS < ebd[j].DurationMS
}

type EpisodesByNumber []*crunchyroll.Episode

func (ebn EpisodesByNumber) Len() int {
	return len(ebn)
}
func (ebn EpisodesByNumber) Swap(i, j int) {
	ebn[i], ebn[j] = ebn[j], ebn[i]
}
func (ebn EpisodesByNumber) Less(i, j int) bool {
	return ebn[i].EpisodeNumber < ebn[j].EpisodeNumber
}

// FormatsByResolution sorts formats after their resolution
type FormatsByResolution []*crunchyroll.Format

func (fbr FormatsByResolution) Len() int {
	return len(fbr)
}
func (fbr FormatsByResolution) Swap(i, j int) {
	fbr[i], fbr[j] = fbr[j], fbr[i]
}
func (fbr FormatsByResolution) Less(i, j int) bool {
	iSplitRes := strings.SplitN(fbr[i].Video.Resolution, "x", 2)
	iResX, _ := strconv.Atoi(iSplitRes[0])
	iResY, _ := strconv.Atoi(iSplitRes[1])

	jSplitRes := strings.SplitN(fbr[j].Video.Resolution, "x", 2)
	jResX, _ := strconv.Atoi(jSplitRes[0])
	jResY, _ := strconv.Atoi(jSplitRes[1])

	return iResX+iResY < jResX+jResY
}