package service

import (
	"net/http"
	"net/http/httptest"
	"sync/atomic"
	"testing"
	"time"

	"go.uber.org/zap"

	"github.com/ShukeBta/MediaStationGo/internal/model"
	"github.com/ShukeBta/MediaStationGo/internal/repository"
)

func TestSubscriptionRunOneArchivesCompletedMovieRSS(t *testing.T) {
	rss := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		w.Header().Set("Content-Type", "application/rss+xml")
		_, _ = w.Write([]byte(`<?xml version="1.0"?>
<rss><channel>
  <item>
    <title>Dune 2021 1080p WEB-DL</title>
    <guid>dune-1080-web</guid>
    <link>magnet:?xt=urn:btih:dddddddddddddddddddddddddddddddddddddddd&amp;dn=Dune+2021+1080p+WEB-DL</link>
  </item>
</channel></rss>`))
	}))
	defer rss.Close()

	var addCalls int32
	var added bool
	qb := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.Path {
		case "/api/v2/auth/login":
			_, _ = w.Write([]byte("Ok."))
		case "/api/v2/torrents/info":
			if added {
				_, _ = w.Write([]byte(`[{"hash":"dunehash","name":"Dune 2021 1080p WEB-DL","state":"downloading","progress":0.1}]`))
				return
			}
			_, _ = w.Write([]byte(`[]`))
		case "/api/v2/torrents/add":
			added = true
			atomic.AddInt32(&addCalls, 1)
			_, _ = w.Write([]byte("Ok."))
		default:
			http.NotFound(w, r)
		}
	}))
	defer qb.Close()

	db := newServiceTestDB(t, &model.Subscription{}, &model.Setting{}, &model.DownloadTask{}, &model.Media{}, &model.DownloadClient{})
	repos := repository.New(db)
	configureTestDefaultQB(t, repos, qb.URL)
	downloads := NewDownloadService(zap.NewNop(), repos, NewHub(zap.NewNop()), nil)
	svc := NewSubscriptionService(nil, zap.NewNop(), repos, downloads, nil, NewHub(zap.NewNop()))

	sub := &model.Subscription{
		Name:      "Dune 自动订阅",
		FeedURL:   rss.URL,
		Filter:    "Dune 2021",
		MediaType: "movie",
		SavePath:  "/downloads/movies",
	}
	if err := repos.Subscription.Create(t.Context(), sub); err != nil {
		t.Fatal(err)
	}
	queued, err := svc.runOne(t.Context(), sub)
	if err != nil {
		t.Fatal(err)
	}
	if queued != 1 {
		t.Fatalf("queued = %d, want 1", queued)
	}
	if got := atomic.LoadInt32(&addCalls); got != 1 {
		t.Fatalf("qb add calls = %d, want 1", got)
	}
	active, err := repos.Subscription.List(t.Context())
	if err != nil {
		t.Fatal(err)
	}
	if len(active) != 0 {
		t.Fatalf("active subscriptions = %d, want 0 after completion", len(active))
	}
	history, err := repos.Subscription.History(t.Context())
	if err != nil {
		t.Fatal(err)
	}
	if len(history) != 1 || history[0].ArchivedAt == nil {
		t.Fatalf("history = %#v, want one archived subscription", history)
	}
}

func TestSubscriptionArchiveCompletedSingleEpisodeTV(t *testing.T) {
	db := newServiceTestDB(t, &model.Subscription{})
	repos := repository.New(db)
	svc := NewSubscriptionService(nil, zap.NewNop(), repos, nil, nil, NewHub(zap.NewNop()))
	sub := &model.Subscription{
		Name:      "Some Show S01E01 自动订阅",
		FeedURL:   "site-search://search?keyword=Some%20Show%20S01E01",
		Filter:    "Some Show S01E01",
		MediaType: "tv",
		Enabled:   true,
	}
	if err := repos.Subscription.Create(t.Context(), sub); err != nil {
		t.Fatal(err)
	}

	if err := svc.archiveCompletedSubscription(t.Context(), sub, LocalAvailability{
		DownloadedEpisodes: 1,
		LocalMediaCount:    1,
		InLibrary:          true,
		ExistingEpisodeKeys: map[string]struct{}{
			episodeKey(1, 1): {},
		},
	}); err != nil {
		t.Fatal(err)
	}
	active, err := repos.Subscription.List(t.Context())
	if err != nil {
		t.Fatal(err)
	}
	if len(active) != 0 {
		t.Fatalf("active subscriptions = %d, want 0", len(active))
	}
	history, err := repos.Subscription.History(t.Context())
	if err != nil {
		t.Fatal(err)
	}
	if len(history) != 1 || history[0].ArchiveReason == "" {
		t.Fatalf("history = %#v, want archived single episode", history)
	}
}

func TestSubscriptionArchiveKeepsGenericUnknownTotalSeriesActive(t *testing.T) {
	sub := &model.Subscription{
		Name:      "Some Show 自动订阅",
		Filter:    "Some Show",
		MediaType: "tv",
	}
	availability := LocalAvailability{
		DownloadedEpisodes: 1,
		LocalMediaCount:    1,
		InLibrary:          true,
		ExistingEpisodeKeys: map[string]struct{}{
			episodeKey(1, 1): {},
		},
	}
	if subscriptionShouldArchive(sub, availability) {
		t.Fatal("generic series with unknown total should stay active for incremental episodes")
	}
}

func TestSubscriptionArchiveKeepsPartialSeriesWithParentRowActive(t *testing.T) {
	sub := &model.Subscription{
		Name:   "南部档案 自动订阅",
		Filter: "南部档案",
	}
	availability := LocalAvailability{
		DownloadedEpisodes: 6,
		TotalEpisodes:      1,
		LocalMediaCount:    7,
		InLibrary:          true,
		HasSeriesPack:      true,
		ExistingEpisodeKeys: map[string]struct{}{
			episodeKey(1, 1): {},
			episodeKey(1, 2): {},
			episodeKey(1, 3): {},
			episodeKey(1, 4): {},
			episodeKey(1, 5): {},
			episodeKey(1, 6): {},
		},
	}
	if subscriptionShouldArchive(sub, availability) {
		t.Fatal("partial series with a parent/collection row should stay active")
	}
}

func TestSubscriptionArchiveKeepsWashSubscriptionActive(t *testing.T) {
	db := newServiceTestDB(t, &model.Subscription{})
	repos := repository.New(db)
	svc := NewSubscriptionService(nil, zap.NewNop(), repos, nil, nil, NewHub(zap.NewNop()))
	sub := &model.Subscription{
		Name:        "Dune 自动订阅",
		FeedURL:     "site-search://search?keyword=Dune",
		Filter:      "Dune 2021",
		MediaType:   "movie",
		WashEnabled: true,
		Enabled:     true,
	}
	if err := repos.Subscription.Create(t.Context(), sub); err != nil {
		t.Fatal(err)
	}

	if err := svc.archiveCompletedSubscription(t.Context(), sub, LocalAvailability{
		DownloadedEpisodes: 1,
		LocalMediaCount:    1,
		InLibrary:          true,
	}); err != nil {
		t.Fatal(err)
	}
	active, err := repos.Subscription.List(t.Context())
	if err != nil {
		t.Fatal(err)
	}
	if len(active) != 1 {
		t.Fatalf("active subscriptions = %d, want wash subscription to stay active", len(active))
	}
	history, err := repos.Subscription.History(t.Context())
	if err != nil {
		t.Fatal(err)
	}
	if len(history) != 0 {
		t.Fatalf("history subscriptions = %d, want 0", len(history))
	}
}

func TestRestoreArchivedSubscriptionReturnsToActiveAndClearsSeenState(t *testing.T) {
	db := newServiceTestDB(t, &model.Subscription{}, &model.Setting{})
	repos := repository.New(db)
	svc := NewSubscriptionService(nil, zap.NewNop(), repos, nil, nil, NewHub(zap.NewNop()))
	sub := &model.Subscription{
		Name:          "南部档案 自动订阅",
		FeedURL:       "https://rss.example/feed",
		Filter:        "南部档案",
		MediaType:     "tv",
		TotalEpisodes: 33,
	}
	if err := repos.Subscription.Create(t.Context(), sub); err != nil {
		t.Fatal(err)
	}
	archivedAt := time.Now()
	if err := repos.Subscription.Archive(t.Context(), sub.ID, "已下载 1/33 集，缺 33 集", archivedAt); err != nil {
		t.Fatal(err)
	}
	if err := repos.Setting.Set(t.Context(), "subscription."+sub.ID+".seen", "old-guid"); err != nil {
		t.Fatal(err)
	}
	restored, err := svc.Restore(t.Context(), sub.ID)
	if err != nil {
		t.Fatal(err)
	}
	if restored.ArchivedAt != nil || restored.ArchiveReason != "" || !restored.Enabled {
		t.Fatalf("restored subscription not active: archived=%v reason=%q enabled=%v", restored.ArchivedAt, restored.ArchiveReason, restored.Enabled)
	}
	if restored.TotalEpisodes != 0 {
		t.Fatalf("restored total_episodes = %d, want 0 so it gets recomputed from authoritative metadata", restored.TotalEpisodes)
	}
	active, err := repos.Subscription.List(t.Context())
	if err != nil {
		t.Fatal(err)
	}
	if len(active) != 1 || active[0].ID != sub.ID {
		t.Fatalf("active subscriptions = %#v, want restored subscription", active)
	}
	history, err := repos.Subscription.History(t.Context())
	if err != nil {
		t.Fatal(err)
	}
	if len(history) != 0 {
		t.Fatalf("history subscriptions = %d, want 0 after restore", len(history))
	}
	seen, err := repos.Setting.Get(t.Context(), "subscription."+sub.ID+".seen")
	if err != nil {
		t.Fatal(err)
	}
	if seen != "" {
		t.Fatalf("seen state = %q, want cleared", seen)
	}
}