using ErrorOr;
using Musify.Application.Albums;
using Musify.Application.Tests.TestSupport;
using Xunit;

namespace Musify.Application.Tests.Albums;

public sealed class UpdateAlbumCommandHandlerTests : HandlerTestBase
{
    private UpdateAlbumCommandHandler CreateHandler() => new(Database, NoOpLogger<UpdateAlbumCommandHandler>());

    [Fact]
    public async Task Handle_Owner_UpdatesTitleDescriptionAndReleaseYear()
    {
        var owner = TestEntities.User();
        var album = TestEntities.UserAlbum(owner.Id, title: "Old Title", description: "Old", releaseYear: 2020);
        await SeedAsync(owner, album);

        var command = new UpdateAlbumCommand(owner.Id, album.Id, "  New Title  ", "New description", 2025);

        var result = await CreateHandler().Handle(command, CancellationToken.None);

        Assert.False(result.IsError);
        Assert.Equal("New Title", result.Value.Title);
        Assert.Equal("New description", result.Value.Description);
        Assert.Equal(2025, result.Value.ReleaseYear);

        var stored = await Database.UserAlbums.FindAsync(album.Id);
        Assert.NotNull(stored);
        Assert.Equal("NEW TITLE", stored.NormalizedTitle);
    }

    [Fact]
    public async Task Handle_AlbumMissing_ReturnsNotFound()
    {
        var command = new UpdateAlbumCommand(1, Guid.NewGuid(), "Title", null, null);

        var result = await CreateHandler().Handle(command, CancellationToken.None);

        Assert.Equal(ErrorType.NotFound, result.FirstError.Type);
    }

    [Fact]
    public async Task Handle_NotOwner_ReturnsUnauthorized()
    {
        var owner = TestEntities.User(1, "owner");
        var stranger = TestEntities.User(2, "stranger");
        var album = TestEntities.UserAlbum(owner.Id);
        await SeedAsync(owner, stranger, album);

        var command = new UpdateAlbumCommand(stranger.Id, album.Id, "Hijacked", null, null);

        var result = await CreateHandler().Handle(command, CancellationToken.None);

        Assert.Equal(ErrorType.Unauthorized, result.FirstError.Type);
    }
}