package lidarrrequests

import (
	"context"
	"errors"
	"io"
	"log/slog"
	"os"
	"testing"

	"github.com/jackc/pgx/v5/pgtype"
	"github.com/jackc/pgx/v5/pgxpool"

	"git.fabledsword.com/bvandeusen/minstrel/internal/db"
	"git.fabledsword.com/bvandeusen/minstrel/internal/db/dbq"
	"git.fabledsword.com/bvandeusen/minstrel/internal/dbtest"
	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrconfig"
)

func newPool(t *testing.T) *pgxpool.Pool {
	t.Helper()
	if testing.Short() {
		t.Skip("skipping integration test in -short mode")
	}
	dsn := os.Getenv("MINSTREL_TEST_DATABASE_URL")
	if dsn == "" {
		t.Skip("MINSTREL_TEST_DATABASE_URL not set")
	}
	if err := db.Migrate(dsn, slog.New(slog.NewTextHandler(io.Discard, nil))); err != nil {
		t.Fatalf("migrate: %v", err)
	}
	pool, err := pgxpool.New(context.Background(), dsn)
	if err != nil {
		t.Fatalf("pool: %v", err)
	}
	t.Cleanup(pool.Close)
	dbtest.ResetDB(t, pool)
	if _, err := pool.Exec(context.Background(),
		"DELETE FROM lidarr_requests; UPDATE lidarr_config SET enabled=false, base_url=NULL, api_key=NULL WHERE id=1",
	); err != nil {
		t.Fatalf("reset lidarr tables: %v", err)
	}
	return pool
}

func seedUser(t *testing.T, pool *pgxpool.Pool) pgtype.UUID {
	t.Helper()
	u, err := dbq.New(pool).CreateUser(context.Background(), dbq.CreateUserParams{
		Username: dbtest.TestUserPrefix + "rqtester", PasswordHash: "x", ApiToken: "x", IsAdmin: false,
	})
	if err != nil {
		t.Fatalf("seed user: %v", err)
	}
	return u.ID
}

func TestCreate_HappyPath_Artist(t *testing.T) {
	pool := newPool(t)
	user := seedUser(t, pool)
	svc := NewService(pool, lidarrconfig.New(pool), nil, nil)
	r, err := svc.Create(context.Background(), user, CreateParams{
		Kind:             "artist",
		LidarrArtistMBID: "069b64b6-7884-4f6a-94cc-e4c1d6c87a01",
		ArtistName:       "Boards of Canada",
	})
	if err != nil {
		t.Fatalf("Create: %v", err)
	}
	if r.Status != dbq.LidarrRequestStatusPending {
		t.Errorf("status = %v", r.Status)
	}
}

func TestCreate_TrackKindRequiresAlbumMBID(t *testing.T) {
	pool := newPool(t)
	user := seedUser(t, pool)
	svc := NewService(pool, lidarrconfig.New(pool), nil, nil)
	_, err := svc.Create(context.Background(), user, CreateParams{
		Kind:             "track",
		LidarrArtistMBID: "a-mbid", ArtistName: "X",
		LidarrTrackMBID: "t-mbid", TrackTitle: "Y",
		// missing album fields
	})
	if !errors.Is(err, ErrInvalidKindFields) {
		t.Fatalf("err = %v, want ErrInvalidKindFields", err)
	}
}

func TestApprove_NotConfigured(t *testing.T) {
	pool := newPool(t)
	user := seedUser(t, pool)
	svc := NewService(pool, lidarrconfig.New(pool), nil, nil)
	r, _ := svc.Create(context.Background(), user, CreateParams{
		Kind: "artist", LidarrArtistMBID: "a-mbid", ArtistName: "X",
	})
	_, err := svc.Approve(context.Background(), r.ID, user, ApproveOverrides{})
	if !errors.Is(err, ErrLidarrDisabled) {
		t.Fatalf("err = %v, want ErrLidarrDisabled", err)
	}
}

func TestReject_TransitionsToRejected(t *testing.T) {
	pool := newPool(t)
	user := seedUser(t, pool)
	svc := NewService(pool, lidarrconfig.New(pool), nil, nil)
	r, _ := svc.Create(context.Background(), user, CreateParams{
		Kind: "artist", LidarrArtistMBID: "a-mbid", ArtistName: "X",
	})
	rejected, err := svc.Reject(context.Background(), r.ID, user, "low quality")
	if err != nil {
		t.Fatalf("Reject: %v", err)
	}
	if rejected.Status != dbq.LidarrRequestStatusRejected {
		t.Errorf("status = %v", rejected.Status)
	}
}

func TestReject_AlreadyRejectedReturnsErrNotPending(t *testing.T) {
	pool := newPool(t)
	user := seedUser(t, pool)
	svc := NewService(pool, lidarrconfig.New(pool), nil, nil)
	r, _ := svc.Create(context.Background(), user, CreateParams{
		Kind: "artist", LidarrArtistMBID: "a-mbid", ArtistName: "X",
	})
	_, _ = svc.Reject(context.Background(), r.ID, user, "first")
	_, err := svc.Reject(context.Background(), r.ID, user, "second")
	if !errors.Is(err, ErrNotPending) {
		t.Fatalf("err = %v, want ErrNotPending", err)
	}
}

func TestCancel_OwnPendingOnly(t *testing.T) {
	pool := newPool(t)
	user := seedUser(t, pool)
	svc := NewService(pool, lidarrconfig.New(pool), nil, nil)
	r, _ := svc.Create(context.Background(), user, CreateParams{
		Kind: "artist", LidarrArtistMBID: "a-mbid", ArtistName: "X",
	})
	if _, err := svc.Cancel(context.Background(), r.ID, user); err != nil {
		t.Fatalf("Cancel: %v", err)
	}
	// Second cancel hits "not pending" because we just rejected it.
	if _, err := svc.Cancel(context.Background(), r.ID, user); !errors.Is(err, ErrNotPending) {
		t.Errorf("err = %v, want ErrNotPending", err)
	}
}