package service

import (
	"errors"
	"net/http"
	"net/http/httptest"
	"path/filepath"
	"strings"
	"testing"

	"github.com/ShukeBta/MediaStationGo/internal/model"
	"gorm.io/gorm"
)

func TestEnrichOneReturnsNoMatchPersistenceError(t *testing.T) {
	scraper, repos, closeServer := newTestScraper(t)
	defer closeServer()

	lib := model.Library{Name: "电影", Path: t.TempDir(), Type: "movie", Enabled: true}
	if err := repos.DB.Create(&lib).Error; err != nil {
		t.Fatal(err)
	}
	media := model.Media{
		LibraryID:    lib.ID,
		Title:        "Definitely Missing Metadata Candidate",
		Path:         filepath.Join(lib.Path, "missing.mkv"),
		ScrapeStatus: "pending",
	}
	if err := repos.DB.Create(&media).Error; err != nil {
		t.Fatal(err)
	}

	wantErr := errors.New("forced no-match update failure")
	callbackName := "test:fail-no-match-update"
	if err := repos.DB.Callback().Update().Before("gorm:update").Register(callbackName, func(tx *gorm.DB) {
		if tx.Statement.Table == "media" {
			tx.AddError(wantErr)
		}
	}); err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() { _ = repos.DB.Callback().Update().Remove(callbackName) })

	if err := scraper.EnrichOne(t.Context(), &media); !errors.Is(err, wantErr) {
		t.Fatalf("EnrichOne() error=%v, want %v", err, wantErr)
	}
}

func TestEnrichOneUsesExistingTMDbIDForCloudMedia(t *testing.T) {
	scraper, repos, closeServer := newTestScraper(t)
	defer closeServer()

	lib := model.Library{Name: "OpenList · 国漫", Path: "cloud://openlist/国漫", Type: "anime", Enabled: true}
	if err := repos.DB.Create(&lib).Error; err != nil {
		t.Fatal(err)
	}
	media := model.Media{
		LibraryID:    lib.ID,
		Title:        "dirty release title",
		Path:         "cloud://openlist/国漫/间谍过家家 (2022) {tmdb-12345}/Season 1/间谍过家家.S01E01.2160p.mkv",
		SeasonNum:    1,
		EpisodeNum:   1,
		TMDbID:       12345,
		ScrapeStatus: "pending",
	}
	if err := repos.DB.Create(&media).Error; err != nil {
		t.Fatal(err)
	}

	if err := scraper.EnrichOne(t.Context(), &media); err != nil {
		t.Fatal(err)
	}
	var got model.Media
	if err := repos.DB.First(&got, "id = ?", media.ID).Error; err != nil {
		t.Fatal(err)
	}
	if got.ScrapeStatus != "matched" || got.Title != "间谍过家家" || got.TMDbID != 12345 || got.PosterURL == "" {
		t.Fatalf("tmdb id scrape did not apply match: title=%q status=%q tmdb=%d poster=%q", got.Title, got.ScrapeStatus, got.TMDbID, got.PosterURL)
	}
}

func TestEnrichOneForceRematchReplacesStaleExternalIDsAndTaxonomy(t *testing.T) {
	scraper, repos, closeServer := newTestScraper(t)
	defer closeServer()

	lib := model.Library{Name: "国产剧", Path: t.TempDir(), Type: "tv", Enabled: true}
	if err := repos.DB.Create(&lib).Error; err != nil {
		t.Fatal(err)
	}
	media := model.Media{
		LibraryID:    lib.ID,
		Title:        "错误旧匹配",
		Path:         filepath.Join(lib.Path, "Spy Family", "Season 01", "Spy Family - S01E01.mkv"),
		SeasonNum:    1,
		EpisodeNum:   1,
		TMDbID:       999,
		BangumiID:    88,
		DoubanID:     "stale",
		Countries:    "CN",
		Languages:    "zh",
		Genres:       "Drama",
		ScrapeStatus: "matched",
	}
	if err := repos.DB.Create(&media).Error; err != nil {
		t.Fatal(err)
	}

	if err := scraper.EnrichOneWithOptions(t.Context(), &media, ScrapeOptions{ForceRematch: true}); err != nil {
		t.Fatal(err)
	}
	var got model.Media
	if err := repos.DB.First(&got, "id = ?", media.ID).Error; err != nil {
		t.Fatal(err)
	}
	if got.TMDbID != 12345 || got.BangumiID != 0 || got.DoubanID != "" {
		t.Fatalf("external ids after forced rematch=%d/%d/%q, want 12345/0/empty", got.TMDbID, got.BangumiID, got.DoubanID)
	}
	if got.Title != "间谍过家家" || got.Countries != "JP" || got.Languages != "ja" || !strings.Contains(got.Genres, "Animation") {
		t.Fatalf("forced rematch metadata=%#v, want corrected Japanese animation metadata", got)
	}
}

func TestEnrichOneWritesTMDbIDColumn(t *testing.T) {
	scraper, repos, closeServer := newTestScraper(t)
	defer closeServer()

	lib := model.Library{Name: "番剧", Path: t.TempDir(), Type: "tv", Enabled: true}
	if err := repos.DB.Create(&lib).Error; err != nil {
		t.Fatal(err)
	}
	mediaPath := filepath.Join(lib.Path, "间谍过家家 - S02E01.mkv")
	if err := repos.DB.Create(&model.Media{
		LibraryID:    lib.ID,
		Title:        "间谍过家家",
		Path:         mediaPath,
		SeasonNum:    2,
		EpisodeNum:   1,
		ScrapeStatus: "pending",
	}).Error; err != nil {
		t.Fatal(err)
	}

	var media model.Media
	if err := repos.DB.First(&media, "path = ?", mediaPath).Error; err != nil {
		t.Fatal(err)
	}
	if err := scraper.EnrichOne(t.Context(), &media); err != nil {
		t.Fatal(err)
	}

	var got model.Media
	if err := repos.DB.First(&got, "id = ?", media.ID).Error; err != nil {
		t.Fatal(err)
	}
	if got.ScrapeStatus != "matched" || got.TMDbID != 12345 {
		t.Fatalf("unexpected scraped media: status=%q tmdb=%d", got.ScrapeStatus, got.TMDbID)
	}
}

func TestEnrichOneTreatsEpisodicMediaInMovieLibraryAsTV(t *testing.T) {
	scraper, repos, closeServer := newTestScraper(t)
	defer closeServer()

	lib := model.Library{Name: "混合库", Path: t.TempDir(), Type: "movie", Enabled: true}
	if err := repos.DB.Create(&lib).Error; err != nil {
		t.Fatal(err)
	}
	media := model.Media{
		LibraryID:    lib.ID,
		Title:        "间谍过家家 S02E01",
		Path:         filepath.Join(lib.Path, "间谍过家家", "Season 02", "间谍过家家 - S02E01.mkv"),
		SeasonNum:    2,
		EpisodeNum:   1,
		ScrapeStatus: "pending",
	}
	if err := repos.DB.Create(&media).Error; err != nil {
		t.Fatal(err)
	}

	if err := scraper.EnrichOne(t.Context(), &media); err != nil {
		t.Fatal(err)
	}

	var got model.Media
	if err := repos.DB.First(&got, "id = ?", media.ID).Error; err != nil {
		t.Fatal(err)
	}
	if got.ScrapeStatus != "matched" || got.TMDbID != 12345 {
		t.Fatalf("episodic media in movie library should use tv scrape: status=%q tmdb=%d", got.ScrapeStatus, got.TMDbID)
	}
}

func TestDetermineMediaTypeForMediaHonorsExplicitMatchType(t *testing.T) {
	scraper := &ScraperService{}
	lib := &model.Library{Name: "欧美剧", Type: "tv"}
	media := &model.Media{
		Title:      "错误识别的电影",
		Path:       filepath.Join("library", "欧美剧", "错误识别的电影 (2024)", "错误识别的电影.S01E202.mkv"),
		SeasonNum:  1,
		EpisodeNum: 202,
	}

	tests := []struct {
		name  string
		match *Match
		want  string
	}{
		{name: "movie match overrides stale episode hints", match: &Match{MediaType: "movie"}, want: "movie"},
		{name: "tv match stays tv", match: &Match{MediaType: "tv"}, want: "tv"},
		{name: "anime match uses tmdb tv endpoint", match: &Match{MediaType: "anime"}, want: "tv"},
		{name: "variety match uses tmdb tv endpoint", match: &Match{MediaType: "variety"}, want: "tv"},
		{name: "adult match uses tmdb movie endpoint", match: &Match{MediaType: "adult"}, want: "movie"},
		{name: "unknown match falls back to episodic hints", match: &Match{}, want: "tv"},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := scraper.determineMediaTypeForMedia(lib, media, tt.match); got != tt.want {
				t.Fatalf("determineMediaTypeForMedia() = %q, want %q", got, tt.want)
			}
		})
	}
}

func TestEnrichOneWritesTMDbEpisodeMetadata(t *testing.T) {
	scraper, repos, closeServer := newTestScraper(t)
	defer closeServer()

	lib := model.Library{Name: "番剧", Path: t.TempDir(), Type: "tv", Enabled: true}
	if err := repos.DB.Create(&lib).Error; err != nil {
		t.Fatal(err)
	}
	mediaPath := filepath.Join(lib.Path, "间谍过家家 - S02E01.mkv")
	existingPoster := "https://image.tmdb.org/t/p/w500/existing-poster.jpg"
	existingBackdrop := "https://image.tmdb.org/t/p/w1280/existing-backdrop.jpg"
	media := model.Media{
		LibraryID:    lib.ID,
		Title:        "间谍过家家",
		Path:         mediaPath,
		SeasonNum:    2,
		EpisodeNum:   1,
		PosterURL:    existingPoster,
		BackdropURL:  existingBackdrop,
		ScrapeStatus: "pending",
	}
	if err := repos.DB.Create(&media).Error; err != nil {
		t.Fatal(err)
	}

	if err := scraper.EnrichOne(t.Context(), &media); err != nil {
		t.Fatal(err)
	}

	var got model.Media
	if err := repos.DB.First(&got, "id = ?", media.ID).Error; err != nil {
		t.Fatal(err)
	}
	// 单集专属信息(简介/剧照/评分/时长)应回填到该集行。
	if got.Overview != "单集剧情" {
		t.Fatalf("episode overview not saved: overview=%q", got.Overview)
	}
	if !strings.HasSuffix(got.BackdropURL, "/images/w500/still.jpg") || got.DurationSec != 24*60 {
		t.Fatalf("episode still/runtime not saved: backdrop=%q duration=%d", got.BackdropURL, got.DurationSec)
	}
	if got.Rating < 9.09 || got.Rating > 9.11 {
		t.Fatalf("episode rating = %v, want 9.1", got.Rating)
	}
	if got.EpisodeTitle != "任务代号: 猫" {
		t.Fatalf("episode_title should store per-episode name, got %q", got.EpisodeTitle)
	}
	// original_name 必须保持「整剧原名」,绝不能被单集名(任务代号: 猫)覆盖,
	// 否则同剧每集 original_name 不同会导致合集被拆成多集无法合并。
	if got.OriginalName != "SPY×FAMILY" {
		t.Fatalf("original_name should stay series-level, got %q (episode name must not overwrite it)", got.OriginalName)
	}
}

func TestEnrichOneSkipsTMDbEpisodeStillWhenDisabled(t *testing.T) {
	scraper, repos, closeServer := newTestScraper(t)
	defer closeServer()

	lib := model.Library{Name: "番剧", Path: t.TempDir(), Type: "tv", Enabled: true}
	if err := repos.DB.Create(&lib).Error; err != nil {
		t.Fatal(err)
	}
	mediaPath := filepath.Join(lib.Path, "间谍过家家 - S02E01.mkv")
	existingPoster := "https://image.tmdb.org/t/p/w500/existing-poster.jpg"
	existingBackdrop := "https://image.tmdb.org/t/p/w1280/existing-backdrop.jpg"
	media := model.Media{
		LibraryID:    lib.ID,
		Title:        "间谍过家家",
		Path:         mediaPath,
		SeasonNum:    2,
		EpisodeNum:   1,
		PosterURL:    existingPoster,
		BackdropURL:  existingBackdrop,
		ScrapeStatus: "pending",
	}
	if err := repos.DB.Create(&media).Error; err != nil {
		t.Fatal(err)
	}

	episodeArtwork := false
	if err := scraper.EnrichOneWithOptions(t.Context(), &media, ScrapeOptions{EpisodeArtwork: &episodeArtwork}); err != nil {
		t.Fatal(err)
	}

	var got model.Media
	if err := repos.DB.First(&got, "id = ?", media.ID).Error; err != nil {
		t.Fatal(err)
	}
	if got.Overview != "单集剧情" || got.DurationSec != 24*60 {
		t.Fatalf("episode metadata should still be saved: overview=%q duration=%d", got.Overview, got.DurationSec)
	}
	if got.Rating < 9.09 || got.Rating > 9.11 {
		t.Fatalf("episode rating = %v, want 9.1", got.Rating)
	}
	if strings.HasSuffix(got.BackdropURL, "/images/w500/still.jpg") {
		t.Fatalf("episode still should not be saved when disabled: backdrop=%q", got.BackdropURL)
	}
	if !strings.HasSuffix(got.PosterURL, "/images/w500/poster.jpg") {
		t.Fatalf("series poster should still be saved when episode artwork is disabled: got %q", got.PosterURL)
	}
	if !strings.HasSuffix(got.BackdropURL, "/images/w1280/backdrop.jpg") {
		t.Fatalf("series backdrop should still be saved when episode artwork is disabled: got %q", got.BackdropURL)
	}
	if got.PosterURL == existingPoster || got.BackdropURL == existingBackdrop {
		t.Fatalf("main artwork should be refreshed while episode still is skipped: poster=%q backdrop=%q", got.PosterURL, got.BackdropURL)
	}
}

func TestApplyManualMatchSkipsTMDbEpisodeStillWhenDisabled(t *testing.T) {
	scraper, repos, closeServer := newTestScraper(t)
	defer closeServer()

	lib := model.Library{Name: "番剧", Path: t.TempDir(), Type: "tv", Enabled: true}
	if err := repos.DB.Create(&lib).Error; err != nil {
		t.Fatal(err)
	}
	media := model.Media{
		LibraryID:    lib.ID,
		Title:        "待匹配",
		Path:         filepath.Join(lib.Path, "间谍过家家 - S02E01.mkv"),
		SeasonNum:    2,
		EpisodeNum:   1,
		ScrapeStatus: "pending",
	}
	if err := repos.DB.Create(&media).Error; err != nil {
		t.Fatal(err)
	}

	episodeArtwork := false
	got, err := scraper.ApplyManualMatch(t.Context(), media.ID, ManualScrapeRequest{
		Source:         "tmdb",
		MediaType:      "tv",
		Title:          "间谍过家家",
		TMDbID:         12345,
		EpisodeArtwork: &episodeArtwork,
	})
	if err != nil {
		t.Fatal(err)
	}
	if got == nil {
		t.Fatal("manual match returned nil media")
	}
	if got.Overview != "单集剧情" || got.DurationSec != 24*60 {
		t.Fatalf("episode metadata should still be saved: overview=%q duration=%d", got.Overview, got.DurationSec)
	}
	if strings.HasSuffix(got.BackdropURL, "/images/w500/still.jpg") {
		t.Fatalf("manual episode still should not be saved when disabled: backdrop=%q", got.BackdropURL)
	}
	if !strings.HasSuffix(got.PosterURL, "/images/w500/poster.jpg") {
		t.Fatalf("series poster should still be saved when manual episode artwork is disabled: got %q", got.PosterURL)
	}
	if !strings.HasSuffix(got.BackdropURL, "/images/w1280/backdrop.jpg") {
		t.Fatalf("series backdrop should still be saved when manual episode artwork is disabled: got %q", got.BackdropURL)
	}
}

func TestEnrichOneAdultScrapesArtwork(t *testing.T) {
	scraper, repos, closeServer := newTestScraper(t)
	defer closeServer()

	lib := model.Library{Name: "小姐姐", Path: t.TempDir(), Type: "movie", Enabled: true}
	if err := repos.DB.Create(&lib).Error; err != nil {
		t.Fatal(err)
	}
	media := model.Media{
		LibraryID:    lib.ID,
		Title:        "IPX-235-C",
		OriginalName: "IPX-235-C",
		Path:         filepath.Join(lib.Path, "IPX-235-C.strm"),
		ScrapeStatus: "pending",
	}
	if err := repos.DB.Create(&media).Error; err != nil {
		t.Fatal(err)
	}

	// Mock adult provider
	adultServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "text/html; charset=utf-8")
		_, _ = w.Write([]byte(`<html><h3>IPX-235 测试番号封面</h3><a class="bigImage" href="/pics/cover/ipx235.jpg"></a></html>`))
	}))
	defer adultServer.Close()

	scraper.adult = &AdultProvider{
		client: adultServer.Client(),
	}

	if err := scraper.EnrichOne(t.Context(), &media); err != nil {
		t.Fatal(err)
	}

	var got model.Media
	if err := repos.DB.First(&got, "id = ?", media.ID).Error; err != nil {
		t.Fatal(err)
	}
	if got.ScrapeStatus != "matched" {
		t.Fatalf("ScrapeStatus = %q, want 'matched'", got.ScrapeStatus)
	}
	if got.PosterURL != "https://pics.dmm.co.jp/digital/video/ipx00235/ipx00235pl.jpg" && got.PosterURL != adultServer.URL+"/pics/cover/ipx235.jpg" {
		t.Fatalf("unexpected PosterURL = %q", got.PosterURL)
	}
}