package store

import (
	"context"
	"database/sql"
	"testing"
)

func seedDownload(t *testing.T, st *Store) int64 {
	t.Helper()
	id, err := st.CreateDownload(context.Background(),
		newDownloading("aabbccddeeff00112233445566778899aabbccdd"))
	if err != nil {
		t.Fatalf("seed download: %v", err)
	}
	return id
}

func TestCreateRecognition_AttemptsAndCurrent(t *testing.T) {
	st := newTestStore(t)
	ctx := context.Background()
	dl := seedDownload(t, st)

	id1, err := st.CreateRecognition(ctx, &Recognition{
		DownloadID: dl,
		MediaType:  NullString("series"),
		Title:      NullString("Show"),
		Year:       sql.NullInt64{Int64: 2006, Valid: true},
		Plan:       NullString(`{"type":"series"}`),
	}, []string{"нет матча в базе"})
	if err != nil {
		t.Fatalf("create #1: %v", err)
	}

	id2, err := st.CreateRecognition(ctx, &Recognition{
		DownloadID: dl,
		MediaType:  NullString("movie"),
		Title:      NullString("Show v2"),
	}, []string{"уточнено"})
	if err != nil {
		t.Fatalf("create #2: %v", err)
	}
	if id2 == id1 {
		t.Fatal("ids must differ")
	}

	cur, err := st.GetCurrentRecognition(ctx, dl)
	if err != nil {
		t.Fatalf("get current: %v", err)
	}
	if cur.ID != id2 {
		t.Errorf("current id = %d, want %d", cur.ID, id2)
	}
	if cur.AttemptNo != 2 {
		t.Errorf("attempt_no = %d, want 2", cur.AttemptNo)
	}
	if !cur.IsCurrent {
		t.Error("current recognition must have is_current = true")
	}
	if cur.Title.String != "Show v2" {
		t.Errorf("title = %q", cur.Title.String)
	}
	if got := cur.ReasonList(); len(got) != 1 || got[0] != "уточнено" {
		t.Errorf("reasons = %v", got)
	}
}

func TestGetCurrentRecognition_None(t *testing.T) {
	st := newTestStore(t)
	dl := seedDownload(t, st)
	cur, err := st.GetCurrentRecognition(context.Background(), dl)
	if err != nil {
		t.Fatalf("get current: %v", err)
	}
	if cur != nil {
		t.Errorf("want nil, got %+v", cur)
	}
}

func TestHints(t *testing.T) {
	st := newTestStore(t)
	ctx := context.Background()
	dl := seedDownload(t, st)

	for _, h := range []string{"второй сезон", "рус+англ дорожки"} {
		if err := st.AddHint(ctx, dl, h); err != nil {
			t.Fatalf("add hint: %v", err)
		}
	}
	got, err := st.ListHints(ctx, dl)
	if err != nil {
		t.Fatalf("list hints: %v", err)
	}
	if len(got) != 2 || got[0] != "второй сезон" || got[1] != "рус+англ дорожки" {
		t.Errorf("hints = %v", got)
	}
}

func TestOverrides_Upsert(t *testing.T) {
	st := newTestStore(t)
	ctx := context.Background()
	dl := seedDownload(t, st)

	if err := st.SetOverride(ctx, dl, "media_type", "series"); err != nil {
		t.Fatalf("set override: %v", err)
	}
	if err := st.SetOverride(ctx, dl, "media_type", "movie"); err != nil { // перезапись
		t.Fatalf("override upsert: %v", err)
	}
	if err := st.SetOverride(ctx, dl, "ignored_files", `["sample.mkv"]`); err != nil {
		t.Fatalf("set override 2: %v", err)
	}

	got, err := st.ListOverrides(ctx, dl)
	if err != nil {
		t.Fatalf("list overrides: %v", err)
	}
	if got["media_type"] != "movie" {
		t.Errorf("media_type = %q, want movie (upsert)", got["media_type"])
	}
	if got["ignored_files"] != `["sample.mkv"]` {
		t.Errorf("ignored_files = %q", got["ignored_files"])
	}
}

func TestFileLinks_BatchLifecycle(t *testing.T) {
	st := newTestStore(t)
	ctx := context.Background()
	dl := seedDownload(t, st)

	batch := "batch-1"
	links := []FileLink{
		{DownloadID: dl, ApplyBatchID: batch, SrcPath: "/d/a.mkv", DstPath: "/m/A.mkv", Kind: "video", Status: "linked"},
		{DownloadID: dl, ApplyBatchID: batch, SrcPath: "/d/a.srt", DstPath: "/m/A.ru.srt", Kind: "subtitle", Status: "linked"},
	}
	if err := st.CreateFileLinks(ctx, links); err != nil {
		t.Fatalf("create links: %v", err)
	}

	latest, err := st.LatestBatchID(ctx, dl)
	if err != nil || latest != batch {
		t.Fatalf("latest batch = %q, %v", latest, err)
	}

	got, err := st.ListFileLinksByBatch(ctx, batch)
	if err != nil {
		t.Fatalf("list by batch: %v", err)
	}
	if len(got) != 2 || got[0].DstPath != "/m/A.mkv" {
		t.Errorf("links = %+v", got)
	}

	if err := st.DeleteFileLinksByBatch(ctx, batch); err != nil {
		t.Fatalf("delete batch: %v", err)
	}
	after, _ := st.ListFileLinksByBatch(ctx, batch)
	if len(after) != 0 {
		t.Errorf("links remain after delete: %+v", after)
	}
}

func TestCandidates_Lifecycle(t *testing.T) {
	st := newTestStore(t)
	ctx := context.Background()
	dl := seedDownload(t, st)
	recID, err := st.CreateRecognition(ctx, &Recognition{DownloadID: dl}, nil)
	if err != nil {
		t.Fatalf("create recognition: %v", err)
	}

	cands := []MetadataCandidate{
		{RecognitionID: recID, Provider: "tvdb", ProviderID: "269613",
			Title: NullString("Fargo"), Year: sql.NullInt64{Int64: 2014, Valid: true}},
		{RecognitionID: recID, Provider: "tmdb", ProviderID: "60622",
			Title: NullString("Fargo")},
	}
	if err := st.CreateCandidates(ctx, cands); err != nil {
		t.Fatalf("create candidates: %v", err)
	}

	got, err := st.ListCandidatesByRecognition(ctx, recID)
	if err != nil {
		t.Fatalf("list: %v", err)
	}
	if len(got) != 2 || got[0].Provider != "tvdb" || got[0].ProviderID != "269613" {
		t.Fatalf("candidates = %+v", got)
	}

	chosenID := got[0].ID
	if err := st.SetCandidateChosen(ctx, recID, chosenID); err != nil {
		t.Fatalf("set chosen: %v", err)
	}
	got, _ = st.ListCandidatesByRecognition(ctx, recID)
	for _, c := range got {
		want := c.ID == chosenID
		if c.Chosen != want {
			t.Errorf("candidate %d chosen = %v, want %v", c.ID, c.Chosen, want)
		}
	}

	// GetCandidate + переотметка.
	single, err := st.GetCandidate(ctx, got[1].ID)
	if err != nil || single == nil || single.Provider != "tmdb" {
		t.Fatalf("get candidate = %+v, %v", single, err)
	}
	if err := st.SetCandidateChosen(ctx, recID, got[1].ID); err != nil {
		t.Fatal(err)
	}
	got, _ = st.ListCandidatesByRecognition(ctx, recID)
	if got[0].Chosen || !got[1].Chosen {
		t.Errorf("re-choose failed: %+v", got)
	}
}

func TestGetCandidate_None(t *testing.T) {
	st := newTestStore(t)
	c, err := st.GetCandidate(context.Background(), 999)
	if err != nil || c != nil {
		t.Errorf("want nil,nil; got %+v, %v", c, err)
	}
}

func TestLatestBatchID_None(t *testing.T) {
	st := newTestStore(t)
	dl := seedDownload(t, st)
	latest, err := st.LatestBatchID(context.Background(), dl)
	if err != nil {
		t.Fatalf("latest batch: %v", err)
	}
	if latest != "" {
		t.Errorf("want empty, got %q", latest)
	}
}