package service

import (
	"fmt"
	"strings"
	"testing"
	"time"

	"go.uber.org/zap"

	"github.com/truewhile/MeBox/internal/config"
	"github.com/truewhile/MeBox/internal/model"
	"github.com/truewhile/MeBox/internal/repository"
)

func TestGroupMediaVersionsMergesEpisodeByExternalIDAcrossLibraries(t *testing.T) {
	local := model.Media{
		LibraryID:  "local-tv",
		Title:      "折腰",
		Path:       "/media/国产剧/折腰 (2025)/Season 1/折腰.S01E01.mkv",
		SeasonNum:  1,
		EpisodeNum: 1,
		TMDbID:     296753,
		SizeBytes:  100,
		PosterURL:  "https://image.tmdb.org/t/p/w500/poster.jpg",
	}
	cloud := model.Media{
		LibraryID:  "cloud-tv",
		Title:      "折腰",
		Path:       "cloud://openlist/国产剧/折腰 (2025) {tmdb-296753}/Season 1/折腰.S01E01.mkv",
		SeasonNum:  1,
		EpisodeNum: 1,
		TMDbID:     296753,
		SizeBytes:  200,
		STRMURL:    "/api/cloud/play/openlist?ref=/国产剧/折腰/01.mkv",
	}

	grouped := groupMediaVersions([]model.Media{local, cloud})
	if len(grouped) != 1 {
		t.Fatalf("grouped len = %d, want 1: %#v", len(grouped), grouped)
	}
	if len(grouped[0].Versions) != 2 {
		t.Fatalf("versions len = %d, want 2: %#v", len(grouped[0].Versions), grouped[0].Versions)
	}
	if grouped[0].Media.Path != local.Path {
		t.Fatalf("local version should remain primary, got %q want %q", grouped[0].Media.Path, local.Path)
	}
	if grouped[0].Versions[0].Path != local.Path || grouped[0].Versions[1].Path != cloud.Path {
		t.Fatalf("versions should be ordered local before cloud, got %#v", grouped[0].Versions)
	}
}

func TestGroupEpisodeVersionsForDisplayMergesAndKeepsEpisodeOrder(t *testing.T) {
	rows := []model.Media{
		{Base: model.Base{ID: "ep2"}, LibraryID: "tv", Title: "Show", SeasonNum: 1, EpisodeNum: 2, TMDbID: 99, Path: "/show/s01e02.mkv"},
		{Base: model.Base{ID: "ep1-small"}, LibraryID: "tv", Title: "Show", SeasonNum: 1, EpisodeNum: 1, TMDbID: 99, Path: "/show/s01e01.mp4", SizeBytes: 100},
		{Base: model.Base{ID: "ep1-large"}, LibraryID: "tv", Title: "Show", SeasonNum: 1, EpisodeNum: 1, TMDbID: 99, Path: "/show/s01e01.mkv", SizeBytes: 200},
	}

	grouped := GroupEpisodeVersionsForDisplay(rows)
	if len(grouped) != 2 {
		t.Fatalf("grouped len = %d, want 2: %#v", len(grouped), grouped)
	}
	if grouped[0].EpisodeNum != 1 || len(grouped[0].Versions) != 2 {
		t.Fatalf("episode 1 was not merged first: %#v", grouped)
	}
	if grouped[0].ID != "ep1-large" {
		t.Fatalf("primary version = %q, want ep1-large", grouped[0].ID)
	}
	if grouped[1].EpisodeNum != 2 {
		t.Fatalf("second item episode = %d, want 2", grouped[1].EpisodeNum)
	}
}

func TestGroupMediaVersionsSeparatesAnimeSpecialKindsAndNumbers(t *testing.T) {
	rows := []model.Media{
		{
			Base:      model.Base{ID: "movie"},
			LibraryID: "anime",
			Title:     "摇曳露营△",
			Path:      "/media/动漫/摇曳露营△/摇曳露营△ 剧场版 (2022)/movie.strm",
			TMDbID:    76075,
		},
		{
			Base:      model.Base{ID: "ova-1"},
			LibraryID: "anime",
			Title:     "摇曳露营△",
			Path:      "/media/动漫/摇曳露营△/OVA/Yuru Camp OVA01.strm",
			TMDbID:    76075,
		},
		{
			Base:      model.Base{ID: "ova-2"},
			LibraryID: "anime",
			Title:     "摇曳露营△",
			Path:      "/media/动漫/摇曳露营△/OVA/Yuru Camp OVA02.strm",
			TMDbID:    76075,
		},
		{
			Base:      model.Base{ID: "oad-1"},
			LibraryID: "anime",
			Title:     "摇曳露营△",
			Path:      "/media/动漫/摇曳露营△/OAD/Yuru Camp OAD01.strm",
			TMDbID:    76075,
		},
	}

	grouped := groupMediaVersions(rows)
	if len(grouped) != 4 {
		t.Fatalf("grouped len = %d, want theatrical, OVA01, OVA02 and OAD01 separate: %#v", len(grouped), grouped)
	}
	for _, item := range grouped {
		if len(item.Versions) > 1 {
			t.Fatalf("unrelated anime extras were merged as versions: %#v", item.Versions)
		}
	}
}

func TestGroupMediaVersionsKeepsBracketNumberedEpisodesSeparate(t *testing.T) {
	// UHA-WINGS 命名：[组名][标题][01][BDRIP 1920x1080 ...].strm。
	// 曾因 1920x1080 被解析成 S20E108，12 集全部折叠成一集的多个版本。
	rows := make([]model.Media, 0, 12)
	for episode := 1; episode <= 12; episode++ {
		rows = append(rows, model.Media{
			Base:      model.Base{ID: fmt.Sprintf("ep-%02d", episode)},
			LibraryID: "anime",
			Title:     "彼得·格里尔的贤者时间",
			Path: fmt.Sprintf(
				"/media/影视库/动漫/彼得·格里尔的贤者时间/[UHA-WINGS][Peter Grill to Kenja no Jikan][%02d][BDRIP 1920x1080 HEVC-YUV420P10 FLAC].strm",
				episode),
			TMDbID: 99080,
		})
	}
	for i := range rows {
		season, episode := ParseEpisode(rows[i].Path)
		rows[i].SeasonNum = season
		rows[i].EpisodeNum = episode
	}

	grouped := groupMediaVersions(rows)
	if len(grouped) != 12 {
		t.Fatalf("grouped len = %d, want 12 distinct episodes: %#v", len(grouped), grouped)
	}
	for _, item := range grouped {
		if len(item.Versions) > 1 {
			t.Fatalf("distinct episodes were folded into versions: %#v", item.Versions)
		}
		if item.SeasonNum != 1 || item.EpisodeNum < 1 || item.EpisodeNum > 12 {
			t.Fatalf("unexpected episode identity s=%d e=%d", item.SeasonNum, item.EpisodeNum)
		}
	}
}

func TestGroupMediaVersionsMergesSameNumberedOVAEncodes(t *testing.T) {
	rows := []model.Media{
		{
			Base:      model.Base{ID: "ova-1-hd"},
			LibraryID: "anime",
			Path:      "/media/动漫/示例/OVA/Show OVA01 1080p.mkv",
			TMDbID:    123,
			SizeBytes: 100,
		},
		{
			Base:      model.Base{ID: "ova-1-uhd"},
			LibraryID: "anime",
			Path:      "/media/动漫/示例/OVA/Show OVA01 2160p.mkv",
			TMDbID:    123,
			SizeBytes: 200,
		},
	}

	grouped := groupMediaVersions(rows)
	if len(grouped) != 1 || len(grouped[0].Versions) != 2 {
		t.Fatalf("same numbered OVA encodes should be versions: %#v", grouped)
	}
}

func TestGroupMediaVersionsMergesMovieEncodingVariants(t *testing.T) {
	hd := model.Media{
		LibraryID:    "movies",
		Title:        "Inception 2010 1080p BluRay x264",
		Path:         "/media/Movies/Inception.2010.1080p.BluRay.x264.mkv",
		Year:         2010,
		SizeBytes:    100,
		VideoCodec:   "h264",
		ScrapeStatus: "pending",
	}
	uhd := model.Media{
		LibraryID:    "movies",
		Title:        "Inception 2010 2160p UHD BluRay x265",
		Path:         "/media/Movies/Inception.2010.2160p.UHD.BluRay.x265.mkv",
		Year:         2010,
		SizeBytes:    200,
		VideoCodec:   "hevc",
		ScrapeStatus: "pending",
	}

	grouped := groupMediaVersions([]model.Media{hd, uhd})
	if len(grouped) != 1 {
		t.Fatalf("grouped len = %d, want 1: %#v", len(grouped), grouped)
	}
	if len(grouped[0].Versions) != 2 {
		t.Fatalf("versions len = %d, want 2: %#v", len(grouped[0].Versions), grouped[0].Versions)
	}
	if grouped[0].Media.Path != uhd.Path {
		t.Fatalf("larger 2160p version should be primary, got %q want %q", grouped[0].Media.Path, uhd.Path)
	}
}

func TestGroupMediaVersionsCleansCodecPunctuation(t *testing.T) {
	web := model.Media{
		LibraryID:    "movies",
		Title:        "Everything Everywhere All at Once 2022 WEB-DL H.265 DDP5.1",
		Path:         "/media/Movies/Everything.Everywhere.All.At.Once.2022.2160p.WEB-DL.H.265.DDP5.1-GRP.mkv",
		SizeBytes:    200,
		VideoCodec:   "hevc",
		ScrapeStatus: "pending",
	}
	bluray := model.Media{
		LibraryID:    "movies",
		Title:        "Everything Everywhere All at Once 2022 BluRay x264 DTS",
		Path:         "/media/Movies/Everything.Everywhere.All.At.Once.2022.1080p.BluRay.x264.DTS-GRP.mkv",
		SizeBytes:    100,
		VideoCodec:   "h264",
		ScrapeStatus: "pending",
	}

	grouped := groupMediaVersions([]model.Media{web, bluray})
	if len(grouped) != 1 {
		t.Fatalf("grouped len = %d, want 1: %#v", len(grouped), grouped)
	}
	if len(grouped[0].Versions) != 2 {
		t.Fatalf("versions len = %d, want 2: %#v", len(grouped[0].Versions), grouped[0].Versions)
	}
	if grouped[0].Media.Path != web.Path {
		t.Fatalf("larger WEB-DL version should be primary, got %q want %q", grouped[0].Media.Path, web.Path)
	}
}

func TestListMediaVisibleGroupedPaginatesAfterVersionGrouping(t *testing.T) {
	db := newServiceTestDB(t, &model.Library{}, &model.Media{})
	repos := repository.New(db)
	lib := model.Library{Name: "电影", Path: "/media/movies", Type: "movie", Enabled: true}
	if err := repos.Library.Create(t.Context(), &lib); err != nil {
		t.Fatal(err)
	}
	now := time.Now()
	rows := []model.Media{
		{
			Base:      model.Base{CreatedAt: now.Add(2 * time.Hour), UpdatedAt: now.Add(2 * time.Hour)},
			LibraryID: lib.ID,
			Title:     "Inception 2010 2160p UHD BluRay x265",
			Path:      "/media/movies/Inception.2010.2160p.UHD.BluRay.x265.mkv",
			TMDbID:    27205,
			Year:      2010,
			Width:     3840,
			Height:    2160,
			SizeBytes: 200,
		},
		{
			Base:      model.Base{CreatedAt: now.Add(time.Hour), UpdatedAt: now.Add(time.Hour)},
			LibraryID: lib.ID,
			Title:     "Inception 2010 1080p BluRay x264",
			Path:      "/media/movies/Inception.2010.1080p.BluRay.x264.mkv",
			TMDbID:    27205,
			Year:      2010,
			Width:     1920,
			Height:    1080,
			SizeBytes: 100,
		},
		{
			Base:      model.Base{CreatedAt: now, UpdatedAt: now},
			LibraryID: lib.ID,
			Title:     "The Matrix 1999 1080p BluRay",
			Path:      "/media/movies/The.Matrix.1999.1080p.BluRay.mkv",
			TMDbID:    603,
			Year:      1999,
			SizeBytes: 90,
		},
	}
	if err := db.Create(&rows).Error; err != nil {
		t.Fatal(err)
	}

	svc := NewMediaService(&config.Config{}, zap.NewNop(), repos).
		SetRuntimeCache(NewRuntimeCacheService(&config.Config{}, zap.NewNop()))
	page, total, err := svc.ListMediaVisibleGrouped(t.Context(), lib.ID, 1, 1, MediaVisibility{IncludeNSFW: true})
	if err != nil {
		t.Fatal(err)
	}
	if total != 2 {
		t.Fatalf("grouped total = %d, want 2", total)
	}
	if len(page) != 1 || len(page[0].Versions) != 2 {
		t.Fatalf("first page should contain merged Inception versions, got %#v", page)
	}
	if page[0].Media.Path != rows[0].Path {
		t.Fatalf("primary version = %q, want %q", page[0].Media.Path, rows[0].Path)
	}
	cacheKey := svc.groupedItemsCacheKey(lib.ID, []string{lib.ID}, repository.MediaQueryFilter{IncludeNSFW: true})
	if _, ok := svc.cache.GetObject(cacheKey); !ok {
		t.Fatal("expected grouped media items to be cached after the first page request")
	}
	secondPage, secondTotal, err := svc.ListMediaVisibleGrouped(t.Context(), lib.ID, 2, 1, MediaVisibility{IncludeNSFW: true})
	if err != nil {
		t.Fatal(err)
	}
	if secondTotal != total || len(secondPage) != 1 || secondPage[0].Media.Path != rows[2].Path {
		t.Fatalf("cached second page = %#v, total = %d; want Matrix item and total %d", secondPage, secondTotal, total)
	}
}

func TestSearchMediaVisiblePageGroupedPaginatesAfterVersionGrouping(t *testing.T) {
	db := newServiceTestDB(t, &model.Media{})
	repos := repository.New(db)
	now := time.Now()
	rows := []model.Media{
		{
			Base:      model.Base{CreatedAt: now.Add(time.Hour), UpdatedAt: now.Add(time.Hour)},
			LibraryID: "movies",
			Title:     "Dune 2021 2160p WEB-DL H265",
			Path:      "/media/movies/Dune.2021.2160p.WEB-DL.H265.mkv",
			TMDbID:    438631,
			Year:      2021,
			Width:     3840,
			Height:    2160,
			SizeBytes: 220,
		},
		{
			Base:      model.Base{CreatedAt: now, UpdatedAt: now},
			LibraryID: "movies",
			Title:     "Dune 2021 1080p BluRay x264",
			Path:      "/media/movies/Dune.2021.1080p.BluRay.x264.mkv",
			TMDbID:    438631,
			Year:      2021,
			Width:     1920,
			Height:    1080,
			SizeBytes: 120,
		},
	}
	if err := db.Create(&rows).Error; err != nil {
		t.Fatal(err)
	}

	svc := NewMediaService(&config.Config{}, zap.NewNop(), repos)
	page, total, err := svc.SearchMediaVisiblePageGrouped(t.Context(), "Dune", 1, 1, MediaVisibility{IncludeNSFW: true})
	if err != nil {
		t.Fatal(err)
	}
	if total != 1 {
		t.Fatalf("grouped total = %d, want 1", total)
	}
	if len(page) != 1 || len(page[0].Versions) != 2 {
		t.Fatalf("search page should contain merged Dune versions, got %#v", page)
	}
	if page[0].Media.Path != rows[0].Path {
		t.Fatalf("primary version = %q, want %q", page[0].Media.Path, rows[0].Path)
	}
}

func TestGroupMediaVersionsDoesNotMergeDifferentRemoteSeries(t *testing.T) {
	// 模拟来自两个不同挂载库（如 00 新番连载 与 2018 动漫）的同名剧集《碧蓝之海》
	season1 := model.Media{
		Base:        model.Base{ID: EncodeEmbyRemoteID("mount-1", "156019")},
		LibraryID:   EncodeEmbyRemoteID("mount-1", "view-1"),
		Title:       "碧蓝之海",
		Year:        2018,
		LibraryName: "2018 动漫",
	}
	season2 := model.Media{
		Base:        model.Base{ID: EncodeEmbyRemoteID("mount-2", "156030")},
		LibraryID:   EncodeEmbyRemoteID("mount-2", "view-2"),
		Title:       "碧蓝之海",
		Year:        2024,
		LibraryName: "00 新番连载",
	}

	grouped := groupMediaVersions([]model.Media{season1, season2})
	if len(grouped) != 2 {
		t.Fatalf("expected 2 separate groups for different remote series/libraries, got %d: %#v", len(grouped), grouped)
	}
	if grouped[0].Title != "碧蓝之海" || grouped[1].Title != "碧蓝之海" {
		t.Fatalf("expected both titles to be '碧蓝之海'")
	}
}

func TestGroupMediaVersionsDoesNotMergeAcrossDifferentLibrariesForMovies(t *testing.T) {
	movieLib1 := model.Media{
		Base:      model.Base{ID: "m-1"},
		LibraryID: "lib-1",
		Title:     "碧蓝之海",
		Year:      2018,
	}
	movieLib2 := model.Media{
		Base:      model.Base{ID: "m-2"},
		LibraryID: "lib-2",
		Title:     "碧蓝之海",
		Year:      2018,
	}

	grouped := groupMediaVersions([]model.Media{movieLib1, movieLib2})
	if len(grouped) != 2 {
		t.Fatalf("expected 2 separate groups for movies in different libraries, got %d", len(grouped))
	}
}

func TestGroupMediaVersionsMergesKeepExtStrmVariants(t *testing.T) {
	mkv := model.Media{
		LibraryID: "movies",
		Title:     "竞女01",
		Path:      "/strm/竞女01.mkv.strm",
		SizeBytes: 500,
		STRMURL:   "/api/strm/play/cloud115/video.mkv?pickcode=a",
	}
	mp4 := model.Media{
		LibraryID: "movies",
		Title:     "竞女01",
		Path:      "/strm/竞女01.mp4.strm",
		SizeBytes: 100,
		STRMURL:   "/api/strm/play/cloud115/video.mp4?pickcode=b",
	}
	grouped := groupMediaVersions([]model.Media{mkv, mp4})
	if len(grouped) != 1 {
		t.Fatalf("grouped len = %d, want 1", len(grouped))
	}
	if len(grouped[0].Versions) != 2 {
		t.Fatalf("versions len = %d, want 2", len(grouped[0].Versions))
	}
	if grouped[0].Path != mkv.Path {
		t.Fatalf("primary should be larger mkv, got %q", grouped[0].Path)
	}
}

func TestMediaVersionLabelUsesContainerAndSize(t *testing.T) {
	label := MediaVersionLabel(model.Media{
		Title:     "竞女01",
		Path:      "/strm/竞女01.mkv.strm",
		Height:    1080,
		SizeBytes: 1024 * 1024 * 1200,
		STRMURL:   "/api/strm/play/cloud115/video.mkv?pickcode=a",
	})
	if !strings.Contains(label, "1080p") || !strings.Contains(strings.ToUpper(label), "MKV") {
		t.Fatalf("unexpected label %q", label)
	}
}

func TestMediaPartNumberFromPath(t *testing.T) {
	cases := []struct {
		path string
		want int
		ok   bool
	}{
		{"/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part1.strm", 1, true},
		{"/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part2.strm", 2, true},
		{"/media/云下载/sivr-270/sivr-270-1.strm", 1, true},
		{"/media/云下载/sivr-270/sivr-270-7.strm", 7, true},
		{"/media/云下载/fc2/FC2PPV-4701981-cd2.strm", 2, true},
		{"/media/Movies/Inception.2010.1080p.BluRay.x264.mkv", 0, false},
		{"/media/Movies/Movie.2024.mkv", 0, false},
	}
	for _, tc := range cases {
		got, ok := mediaPartNumber(tc.path)
		if ok != tc.ok || got != tc.want {
			t.Fatalf("mediaPartNumber(%q) = (%d, %v), want (%d, %v)", tc.path, got, ok, tc.want, tc.ok)
		}
	}
}

func TestGroupMediaVersionsSortsPartsAscending(t *testing.T) {
	rows := []model.Media{
		{
			Base:      model.Base{ID: "p3"},
			LibraryID: "cloud",
			Title:     "SIVR-270",
			Path:      "/media/云下载/sivr-270/sivr-270-3.strm",
			Year:      2023,
			NSFW:      true,
			SizeBytes: 300,
		},
		{
			Base:      model.Base{ID: "p1"},
			LibraryID: "cloud",
			Title:     "SIVR-270",
			Path:      "/media/云下载/sivr-270/sivr-270-1.strm",
			Year:      2023,
			NSFW:      true,
			SizeBytes: 100,
		},
		{
			Base:      model.Base{ID: "p2"},
			LibraryID: "cloud",
			Title:     "SIVR-270",
			Path:      "/media/云下载/sivr-270/sivr-270-2.strm",
			Year:      2023,
			NSFW:      true,
			SizeBytes: 200,
		},
	}
	grouped := groupMediaVersions(rows)
	if len(grouped) != 1 || len(grouped[0].Versions) != 3 {
		t.Fatalf("grouped = %#v", grouped)
	}
	want := []string{"p1", "p2", "p3"}
	for i, id := range want {
		if grouped[0].Versions[i].ID != id {
			t.Fatalf("versions[%d] = %q, want %q (order %#v)", i, grouped[0].Versions[i].ID, id, grouped[0].Versions)
		}
	}
	if grouped[0].ID != "p1" {
		t.Fatalf("primary = %q, want p1 (first part)", grouped[0].ID)
	}
}

func TestMediaVersionLabelFallsBackToFilenameWhenIndistinct(t *testing.T) {
	label := MediaVersionLabel(model.Media{
		Title:     "SIVR-270-【VR】河北彩花",
		Path:      "/media/云下载/sivr-270/sivr-270-1.strm",
		SizeBytes: 157,
		STRMURL:   "/api/strm/play/cloud115/video.mp4?pickcode=a",
	})
	if !strings.Contains(label, "sivr-270-1") {
		t.Fatalf("indistinct strm label should fall back to filename, got %q", label)
	}
	if strings.EqualFold(label, "MP4") || strings.Contains(label, "云端") {
		t.Fatalf("should not keep generic-only label %q", label)
	}
}

// SIVR-270 现场：一部分分片走在线刮削（MetaTube 把番号/provider 借用进
// douban_id/thetvdb_id），另一部分只从本地 NFO 拿到标题（没有外部 ID）。
// 按外部 ID 分组会把它们裂成两张标题完全相同的卡，必须按番号折成一张。
func TestGroupMediaVersionsMergesAdultPartsAcrossMetadataSources(t *testing.T) {
	online := model.Media{
		Base:         model.Base{ID: "sivr-270-2"},
		LibraryID:    "cloud",
		Title:        "SIVR-270-【VR】河北彩花",
		OriginalName: "SIVR-270",
		Path:         "/media/云下载/sivr-270/sivr-270-2.strm",
		Year:         2023,
		NSFW:         true,
		DoubanID:     "SIVR-270",
		TheTVDBID:    "JavBus",
		ScrapeStatus: "matched",
		SizeBytes:    200,
	}
	fromNFO := model.Media{
		Base:         model.Base{ID: "sivr-270-3"},
		LibraryID:    "cloud",
		Title:        "SIVR-270-【VR】河北彩花",
		OriginalName: "SIVR-270",
		Path:         "/media/云下载/sivr-270/sivr-270-3.strm",
		Year:         2023,
		NSFW:         true,
		ScrapeStatus: "matched",
		SizeBytes:    100,
	}

	grouped := groupMediaVersions([]model.Media{online, fromNFO})
	if len(grouped) != 1 {
		t.Fatalf("grouped len = %d, want 1: %#v", len(grouped), grouped)
	}
	if len(grouped[0].Versions) != 2 {
		t.Fatalf("versions len = %d, want 2", len(grouped[0].Versions))
	}
	if grouped[0].Path != online.Path {
		t.Fatalf("larger part should stay primary, got %q", grouped[0].Path)
	}
}

func TestGroupMediaVersionsKeepsDifferentAdultCodesSeparate(t *testing.T) {
	rows := []model.Media{
		{
			Base:      model.Base{ID: "sivr-270"},
			LibraryID: "cloud",
			Title:     "SIVR-270 作品",
			Path:      "/media/云下载/sivr-270/sivr-270-1.strm",
			Year:      2023,
			NSFW:      true,
		},
		{
			Base:      model.Base{ID: "sivr-271"},
			LibraryID: "cloud",
			Title:     "SIVR-271 作品",
			Path:      "/media/云下载/sivr-271/sivr-271-1.strm",
			Year:      2023,
			NSFW:      true,
		},
	}
	grouped := groupMediaVersions(rows)
	if len(grouped) != 2 {
		t.Fatalf("different adult codes must stay separate: %#v", grouped)
	}
}

// 同一部片的两种写法：路径里的 IPVR-00192 与刮削回来的 IPVR-192 必须归一。
func TestGroupMediaVersionsMergesAdultCodesIgnoringZeroPadding(t *testing.T) {
	scraped := model.Media{
		Base:         model.Base{ID: "ipvr-192-part2"},
		LibraryID:    "cloud",
		Title:        "IPVR-192-相沢みなみ",
		OriginalName: "IPVR-192",
		Path:         "/media/云下载/ipvr00192pl/scraped/part2.strm",
		Year:         2022,
		NSFW:         true,
		ScrapeStatus: "matched",
		SizeBytes:    200,
	}
	fromPath := model.Media{
		Base:      model.Base{ID: "ipvr-00192-part1"},
		LibraryID: "cloud",
		Title:     "fbzip com@ipvr00192",
		Path:      "/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part1.strm",
		Year:      2022,
		NSFW:      true,
		SizeBytes: 100,
	}
	grouped := groupMediaVersions([]model.Media{scraped, fromPath})
	if len(grouped) != 1 || len(grouped[0].Versions) != 2 {
		t.Fatalf("zero padded code must fold into one item: %#v", grouped)
	}
}

func TestGroupMediaVersionsMergesAdultPartsWithBorrowedMetaTubeIDs(t *testing.T) {
	// IPVR-00192 现场：两个 part 标题、年份完全一样，但 part2 是走 MetaTube
	// 刮削的（番号/provider 被借用进 douban_id/thetvdb_id），part1 只有本地
	// NFO 身份、两个字段为空。旧逻辑按外部 ID 分组会裂成两张卡。
	part1 := model.Media{
		Base:         model.Base{ID: "ipvr-00192-part1"},
		LibraryID:    "cloud",
		Title:        "IPVR-00192-IPVR-192-【VR】相沢みなみ",
		OriginalName: "IPVR-00192",
		Path:         "/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part1.strm",
		Year:         2022,
		NSFW:         true,
		ScrapeStatus: "matched",
		SizeBytes:    100,
	}
	part2 := part1
	part2.ID = "ipvr-00192-part2"
	part2.Path = "/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part2.strm"
	part2.DoubanID = "ipvr00192"
	part2.TheTVDBID = "JAV321"
	part2.SizeBytes = 200

	grouped := groupMediaVersions([]model.Media{part1, part2})
	if len(grouped) != 1 {
		t.Fatalf("grouped len = %d, want 1: %#v", len(grouped), grouped)
	}
	if len(grouped[0].Versions) != 2 {
		t.Fatalf("versions len = %d, want 2", len(grouped[0].Versions))
	}
	if grouped[0].Versions[0].ID != "ipvr-00192-part1" || grouped[0].Versions[1].ID != "ipvr-00192-part2" {
		t.Fatalf("versions should be part1 then part2, got %#v", grouped[0].Versions)
	}
}

func TestGetMediaItemListsAdultVersionsAcrossMetadataSources(t *testing.T) {
	db := newServiceTestDB(t, &model.Library{}, &model.Media{})
	repos := repository.New(db)
	lib := model.Library{Name: "云下载", Path: "/media/云下载", Type: "movie", Enabled: true}
	if err := repos.Library.Create(t.Context(), &lib); err != nil {
		t.Fatal(err)
	}
	rows := []model.Media{
		{
			// 走 MetaTube 刮削的分片：番号/provider 被借用进 douban/thetvdb。
			LibraryID:    lib.ID,
			Title:        "SIVR-270-【VR】河北彩花",
			OriginalName: "SIVR-270",
			Path:         "/media/云下载/sivr-270/sivr-270-1.strm",
			Year:         2023,
			NSFW:         true,
			DoubanID:     "SIVR-270",
			TheTVDBID:    "JavBus",
			ScrapeStatus: "matched",
			SizeBytes:    200,
		},
		{
			// 只有本地 NFO 身份的分片：两个外部 ID 都为空。
			LibraryID:    lib.ID,
			Title:        "SIVR-270-【VR】河北彩花",
			OriginalName: "SIVR-270",
			Path:         "/media/云下载/sivr-270/sivr-270-4.strm",
			Year:         2023,
			NSFW:         true,
			ScrapeStatus: "matched",
			SizeBytes:    100,
		},
	}
	if err := db.Create(&rows).Error; err != nil {
		t.Fatal(err)
	}

	svc := NewMediaService(&config.Config{}, zap.NewNop(), repos).
		SetRuntimeCache(NewRuntimeCacheService(&config.Config{}, zap.NewNop()))
	item, err := svc.GetMediaItem(t.Context(), rows[0].ID)
	if err != nil {
		t.Fatal(err)
	}
	if item == nil || len(item.Versions) != 2 {
		// 详情页版本列表不能只按外部 ID 收窄，否则没有 ID 的分片会消失。
		t.Fatalf("versions = %#v, want both parts", item)
	}
}

func TestMediaAdultGroupCodeRequiresNSFW(t *testing.T) {
	cases := []struct {
		name string
		m    model.Media
		want string
	}{
		{
			name: "普通影片名里的字母+数字不当番号",
			m:    model.Media{Title: "Spider-Man 2008 1080p", Path: "/media/Movies/Spider-Man 2008 1080p.mkv"},
			want: "",
		},
		{
			name: "未识别成人的条目即使文件名像番号也不折叠",
			m:    model.Media{Title: "SIVR-270", Path: "/media/云下载/sivr-270/sivr-270-1.strm"},
			want: "",
		},
		{
			name: "已标记 NSFW 时按番号分组",
			m:    model.Media{NSFW: true, Title: "sivr 270", Path: "/media/云下载/sivr-270/sivr-270-1.strm"},
			want: "SIVR-270",
		},
		{
			name: "站点前缀里带补零的番号会归一",
			m:    model.Media{NSFW: true, Title: "fbzip com@ipvr00192", Path: "/media/云下载/ipvr00192pl/fbzip.com@ipvr00192.part1.strm"},
			want: "IPVR-192",
		},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			if got := mediaAdultGroupCode(tc.m); got != tc.want {
				t.Fatalf("mediaAdultGroupCode = %q, want %q", got, tc.want)
			}
		})
	}
}