package app

import (
	"context"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"testing"

	"streamrip-go/internal/audio/tag"
	"streamrip-go/internal/config"
	"streamrip-go/internal/download"
	"streamrip-go/internal/provider"
	"streamrip-go/internal/store"
)

type noopTagger struct{}

func (n noopTagger) TagFLAC(string, tag.Metadata, string) error { return nil }

type fakeProvider struct {
	url string
}

func (f *fakeProvider) Source() string              { return "qobuz" }
func (f *fakeProvider) Login(context.Context) error { return nil }
func (f *fakeProvider) LoggedIn() bool              { return true }
func (f *fakeProvider) Close() error                { return nil }
func (f *fakeProvider) Search(context.Context, string, string, int) ([]map[string]any, error) {
	return nil, nil
}
func (f *fakeProvider) GetMetadata(context.Context, string, string) (map[string]any, error) {
	return map[string]any{
		"title":        "Dreams/Live",
		"track_number": float64(3),
		"performer": map[string]any{
			"name": "Fleetwood Mac",
		},
		"album": map[string]any{
			"artist": map[string]any{"name": "Fleetwood Mac"},
		},
	}, nil
}

type fakeAlbumProvider struct {
	url string
}

type fakePlaylistProvider struct {
	url string
}

type fakeVideoProvider struct {
	url string
}

type fakeFailProvider struct{}

func (f *fakeAlbumProvider) Source() string              { return "qobuz" }
func (f *fakePlaylistProvider) Source() string           { return "qobuz" }
func (f *fakeVideoProvider) Source() string              { return "tidal" }
func (f *fakeAlbumProvider) Login(context.Context) error { return nil }
func (f *fakePlaylistProvider) Login(context.Context) error {
	return nil
}
func (f *fakeVideoProvider) Login(context.Context) error { return nil }
func (f *fakeAlbumProvider) LoggedIn() bool              { return true }
func (f *fakePlaylistProvider) LoggedIn() bool           { return true }
func (f *fakeVideoProvider) LoggedIn() bool              { return true }
func (f *fakeAlbumProvider) Close() error                { return nil }
func (f *fakePlaylistProvider) Close() error             { return nil }
func (f *fakeVideoProvider) Close() error                { return nil }
func (f *fakeAlbumProvider) Search(context.Context, string, string, int) ([]map[string]any, error) {
	return nil, nil
}
func (f *fakePlaylistProvider) Search(context.Context, string, string, int) ([]map[string]any, error) {
	return nil, nil
}
func (f *fakeVideoProvider) Search(context.Context, string, string, int) ([]map[string]any, error) {
	return nil, nil
}
func (f *fakeAlbumProvider) GetMetadata(_ context.Context, id string, mediaType string) (map[string]any, error) {
	if mediaType == "album" {
		return map[string]any{
			"title":                 "Rumours",
			"release_date_original": "1977-02-04",
			"media_count":           float64(2),
			"maximum_bit_depth":     float64(24),
			"maximum_sampling_rate": float64(96),
			"artist":                map[string]any{"name": "Fleetwood Mac"},
			"tracks": map[string]any{"items": []any{
				map[string]any{"id": "t1"},
				map[string]any{"id": "t2"},
			}},
		}, nil
	}

	tn := float64(1)
	disc := float64(1)
	title := "Dreams"
	if id == "t2" {
		tn = 2
		disc = 2
		title = "Go Your Own Way"
	}
	return map[string]any{
		"title":        title,
		"track_number": tn,
		"media_number": disc,
		"performer": map[string]any{
			"name": "Fleetwood Mac",
		},
		"album": map[string]any{
			"title":  "Rumours",
			"artist": map[string]any{"name": "Fleetwood Mac"},
		},
	}, nil
}

func (f *fakePlaylistProvider) GetMetadata(_ context.Context, id string, mediaType string) (map[string]any, error) {
	if mediaType == "playlist" {
		return map[string]any{
			"name": "Road Trip",
			"tracks": map[string]any{
				"items": []any{map[string]any{"id": "p1"}, map[string]any{"id": "p2"}},
			},
		}, nil
	}

	trackNum := float64(7)
	title := "Track One"
	if id == "p2" {
		trackNum = 9
		title = "Track Two"
	}
	return map[string]any{
		"title":        title,
		"track_number": trackNum,
		"performer": map[string]any{
			"name": "Artist",
		},
		"album": map[string]any{
			"title":  "Original Album",
			"artist": map[string]any{"name": "Artist"},
		},
	}, nil
}
func (f *fakeVideoProvider) GetMetadata(_ context.Context, id string, mediaType string) (map[string]any, error) {
	if mediaType == "video" {
		return map[string]any{"title": "Live Clip"}, nil
	}
	return nil, nil
}
func (f *fakeProvider) GetDownloadable(context.Context, string, int) (*provider.Downloadable, error) {
	return &provider.Downloadable{URL: f.url, Extension: "flac", Source: "qobuz"}, nil
}
func (f *fakeAlbumProvider) GetDownloadable(context.Context, string, int) (*provider.Downloadable, error) {
	return &provider.Downloadable{URL: f.url, Extension: "flac", Source: "qobuz"}, nil
}
func (f *fakePlaylistProvider) GetDownloadable(context.Context, string, int) (*provider.Downloadable, error) {
	return &provider.Downloadable{URL: f.url, Extension: "flac", Source: "qobuz"}, nil
}
func (f *fakeVideoProvider) GetDownloadable(context.Context, string, int) (*provider.Downloadable, error) {
	return nil, nil
}
func (f *fakeVideoProvider) GetVideoDownloadable(context.Context, string) (*provider.Downloadable, error) {
	return &provider.Downloadable{URL: f.url, Extension: "mp4", Source: "tidal"}, nil
}
func (f *fakeFailProvider) Source() string              { return "qobuz" }
func (f *fakeFailProvider) Login(context.Context) error { return nil }
func (f *fakeFailProvider) LoggedIn() bool              { return true }
func (f *fakeFailProvider) Close() error                { return nil }
func (f *fakeFailProvider) Search(context.Context, string, string, int) ([]map[string]any, error) {
	return nil, nil
}
func (f *fakeFailProvider) GetMetadata(context.Context, string, string) (map[string]any, error) {
	return nil, os.ErrNotExist
}
func (f *fakeFailProvider) GetDownloadable(context.Context, string, int) (*provider.Downloadable, error) {
	return nil, os.ErrNotExist
}

func TestTrackRipPipeline(t *testing.T) {
	tmp := t.TempDir()

	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_, _ = w.Write([]byte("audio-bytes"))
	}))
	defer ts.Close()

	d := config.DefaultConfigData()
	d.Downloads.Folder = tmp
	d.Downloads.SourceSubdirectories = false
	cfg := &config.Config{File: d, Session: d}

	sqlite, err := store.NewSQLite(filepath.Join(tmp, "db.sqlite"))
	if err != nil {
		t.Fatalf("NewSQLite() error = %v", err)
	}
	defer func() { _ = sqlite.Close() }()

	m := &Main{
		Config: cfg,
		Providers: map[string]provider.Client{
			"qobuz": &fakeProvider{url: ts.URL},
		},
		Store:   sqlite,
		DL:      download.New(),
		Tagger:  noopTagger{},
		Pending: nil,
		Media:   nil,
	}

	ctx := context.Background()
	if err = m.AddByID(ctx, "qobuz", "track", "19512574"); err != nil {
		t.Fatalf("AddByID() error = %v", err)
	}
	if err = m.Resolve(ctx); err != nil {
		t.Fatalf("Resolve() error = %v", err)
	}
	if err = m.Rip(ctx); err != nil {
		t.Fatalf("Rip() error = %v", err)
	}

	if _, err = os.Stat(filepath.Join(tmp, "03. Fleetwood Mac - Dreams_Live.flac")); err != nil {
		t.Fatalf("expected downloaded file: %v", err)
	}

	ok, err := sqlite.IsDownloaded(ctx, "qobuz", "19512574")
	if err != nil {
		t.Fatalf("IsDownloaded() error = %v", err)
	}
	if !ok {
		t.Fatalf("expected track marked downloaded")
	}
}

func TestAlbumRipPipeline(t *testing.T) {
	tmp := t.TempDir()

	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_, _ = w.Write([]byte("audio-bytes"))
	}))
	defer ts.Close()

	d := config.DefaultConfigData()
	d.Downloads.Folder = tmp
	d.Downloads.SourceSubdirectories = false
	d.Downloads.Concurrency = false
	cfg := &config.Config{File: d, Session: d}

	sqlite, err := store.NewSQLite(filepath.Join(tmp, "db.sqlite"))
	if err != nil {
		t.Fatalf("NewSQLite() error = %v", err)
	}
	defer func() { _ = sqlite.Close() }()

	m := &Main{
		Config: cfg,
		Providers: map[string]provider.Client{
			"qobuz": &fakeAlbumProvider{url: ts.URL},
		},
		Store:  sqlite,
		DL:     download.New(),
		Tagger: noopTagger{},
	}

	ctx := context.Background()
	if err = m.AddByID(ctx, "qobuz", "album", "a1"); err != nil {
		t.Fatalf("AddByID() error = %v", err)
	}
	if err = m.Resolve(ctx); err != nil {
		t.Fatalf("Resolve() error = %v", err)
	}
	if err = m.Rip(ctx); err != nil {
		t.Fatalf("Rip() error = %v", err)
	}

	folder := filepath.Join(tmp, "Fleetwood Mac - Rumours (1977) [FLAC] [24B-96kHz]")
	if _, err = os.Stat(filepath.Join(folder, "Disc 1", "01. Fleetwood Mac - Dreams.flac")); err != nil {
		t.Fatalf("missing first album track: %v", err)
	}
	if _, err = os.Stat(filepath.Join(folder, "Disc 2", "02. Fleetwood Mac - Go Your Own Way.flac")); err != nil {
		t.Fatalf("missing second album track: %v", err)
	}
}

func TestVideoRipPipeline(t *testing.T) {
	tmp := t.TempDir()

	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_, _ = w.Write([]byte("video-bytes"))
	}))
	defer ts.Close()

	d := config.DefaultConfigData()
	d.Downloads.Folder = tmp
	d.Downloads.SourceSubdirectories = false
	cfg := &config.Config{File: d, Session: d}

	sqlite, err := store.NewSQLite(filepath.Join(tmp, "db.sqlite"))
	if err != nil {
		t.Fatalf("NewSQLite() error = %v", err)
	}
	defer func() { _ = sqlite.Close() }()

	m := &Main{
		Config: cfg,
		Providers: map[string]provider.Client{
			"tidal": &fakeVideoProvider{url: ts.URL},
		},
		Store:   sqlite,
		DL:      download.New(),
		Tagger:  noopTagger{},
		Pending: nil,
		Media:   nil,
	}

	ctx := context.Background()
	if err = m.AddByID(ctx, "tidal", "video", "v1"); err != nil {
		t.Fatalf("AddByID() error = %v", err)
	}
	if err = m.Resolve(ctx); err != nil {
		t.Fatalf("Resolve() error = %v", err)
	}
	if err = m.Rip(ctx); err != nil {
		t.Fatalf("Rip() error = %v", err)
	}

	if _, err = os.Stat(filepath.Join(tmp, "Live Clip.mp4")); err != nil {
		t.Fatalf("expected downloaded video file: %v", err)
	}

	ok, err := sqlite.IsDownloaded(ctx, "tidal", "v1")
	if err != nil {
		t.Fatalf("IsDownloaded() error = %v", err)
	}
	if !ok {
		t.Fatalf("expected video marked downloaded")
	}
}

func TestResolveAllFailedReturnsError(t *testing.T) {
	tmp := t.TempDir()
	d := config.DefaultConfigData()
	d.Downloads.Folder = tmp
	cfg := &config.Config{File: d, Session: d}

	m := &Main{
		Config: cfg,
		Providers: map[string]provider.Client{
			"qobuz": &fakeFailProvider{},
		},
		Store:   store.NewDummy(),
		DL:      download.New(),
		Tagger:  noopTagger{},
		Pending: nil,
		Media:   nil,
	}

	ctx := context.Background()
	if err := m.AddByID(ctx, "qobuz", "track", "x"); err != nil {
		t.Fatalf("AddByID() error = %v", err)
	}
	if err := m.Resolve(ctx); err == nil {
		t.Fatalf("expected Resolve() to return error when all items fail")
	}
}

func TestPlaylistRipPipeline(t *testing.T) {
	tmp := t.TempDir()

	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_, _ = w.Write([]byte("audio-bytes"))
	}))
	defer ts.Close()

	d := config.DefaultConfigData()
	d.Downloads.Folder = tmp
	d.Downloads.Concurrency = false
	d.Filepaths.RestrictCharacters = false
	cfg := &config.Config{File: d, Session: d}

	sqlite, err := store.NewSQLite(filepath.Join(tmp, "db.sqlite"))
	if err != nil {
		t.Fatalf("NewSQLite() error = %v", err)
	}
	defer func() { _ = sqlite.Close() }()

	m := &Main{
		Config: cfg,
		Providers: map[string]provider.Client{
			"qobuz": &fakePlaylistProvider{url: ts.URL},
		},
		Store:  sqlite,
		DL:     download.NewWithOptions(true, false),
		Tagger: noopTagger{},
	}

	ctx := context.Background()
	if err = m.AddByID(ctx, "qobuz", "playlist", "pl1"); err != nil {
		t.Fatalf("AddByID() error = %v", err)
	}
	if err = m.Resolve(ctx); err != nil {
		t.Fatalf("Resolve() error = %v", err)
	}
	if err = m.Rip(ctx); err != nil {
		t.Fatalf("Rip() error = %v", err)
	}

	folder := filepath.Join(tmp, "Road Trip")
	if _, err = os.Stat(filepath.Join(folder, "01. Artist - Track One.flac")); err != nil {
		t.Fatalf("missing first playlist track: %v", err)
	}
	if _, err = os.Stat(filepath.Join(folder, "02. Artist - Track Two.flac")); err != nil {
		t.Fatalf("missing second playlist track: %v", err)
	}
}

func TestApplyQobuzArtistFiltersRepeats(t *testing.T) {
	albums := []collectionAlbum{
		{ID: "a1", Title: "Album X", BitDepth: 16, Sampling: 44.1, Explicit: false},
		{ID: "a2", Title: "Album X (Deluxe)", BitDepth: 24, Sampling: 96, Explicit: false},
		{ID: "b1", Title: "Album B", BitDepth: 16, Sampling: 44.1, Explicit: false},
	}
	filtered := applyQobuzArtistFilters("artist", albums, config.QobuzDiscographyFilterConfig{Repeats: true})
	if len(filtered) != 2 {
		t.Fatalf("len(filtered)=%d want 2", len(filtered))
	}
	ids := map[string]bool{}
	for _, a := range filtered {
		ids[a.ID] = true
	}
	if !ids["a2"] || !ids["b1"] {
		t.Fatalf("unexpected winners: %+v", ids)
	}
}

func TestApplyQobuzArtistFiltersNonRemaster(t *testing.T) {
	albums := []collectionAlbum{
		{ID: "rm", Title: "Album X (Remastered)"},
		{ID: "orig", Title: "Album X"},
	}

	filtered := applyQobuzArtistFilters("artist", albums, config.QobuzDiscographyFilterConfig{NonRemaster: true})
	if len(filtered) != 1 {
		t.Fatalf("len(filtered)=%d want 1", len(filtered))
	}
	if filtered[0].ID != "orig" {
		t.Fatalf("unexpected album kept: %+v", filtered[0])
	}
}

func TestTrackOutputPathSinglesUsesAlbumID(t *testing.T) {
	tmp := t.TempDir()
	d := config.DefaultConfigData()
	d.Downloads.Folder = tmp
	d.Downloads.SourceSubdirectories = false
	d.Filepaths.AddSinglesToFolder = true
	d.Filepaths.FolderFormat = "{id}"
	d.Filepaths.TrackFormat = "{title}"
	d.Filepaths.RestrictCharacters = false

	m := &Main{Config: &config.Config{File: d, Session: d}}
	meta := map[string]any{
		"album": map[string]any{
			"id":     "album-123",
			"title":  "Album",
			"artist": map[string]any{"name": "Artist"},
		},
		"performer": map[string]any{"name": "Artist"},
	}

	out := m.trackOutputPath("qobuz", "track-999", "Song", "flac", meta, "", 0)
	if got, want := filepath.Dir(out), filepath.Join(tmp, "album-123"); got != want {
		t.Fatalf("trackOutputPath() dir=%q want %q", got, want)
	}
}

func TestBuildTagMetadataReplayGainFallbacks(t *testing.T) {
	meta := map[string]any{
		"replayGain": float64(-7.25),
		"peak":       float64(0.989),
		"album": map[string]any{
			"title":                 "Album",
			"replaygain_album_gain": float64(-8.1),
			"replaygain_album_peak": float64(1.001),
		},
		"performer": map[string]any{"name": "Artist"},
	}

	tags := buildTagMetadata(meta, "Song", "tidal", "t1", ripTrackOptions{})
	if tags.ReplaygainTrackGain != "-7.25 dB" {
		t.Fatalf("track replaygain gain=%q", tags.ReplaygainTrackGain)
	}
	if tags.ReplaygainAlbumGain != "-8.1 dB" {
		t.Fatalf("album replaygain gain=%q", tags.ReplaygainAlbumGain)
	}
	if tags.ReplaygainTrackPeak != "0.989" {
		t.Fatalf("track replaygain peak=%q", tags.ReplaygainTrackPeak)
	}
	if tags.ReplaygainAlbumPeak != "1.001" {
		t.Fatalf("album replaygain peak=%q", tags.ReplaygainAlbumPeak)
	}
}