using ErrorOr;
using Microsoft.EntityFrameworkCore;
using Musify.Application.Configuration;
using Musify.Application.Contracts;
using Musify.Application.Services;
using Musify.Application.Tests.TestSupport;
using Musify.Application.Tracks;
using NSubstitute;
using Xunit;

namespace Musify.Application.Tests.Tracks;

public sealed class GetTrackStreamQueryHandlerTests : HandlerTestBase
{
    private readonly IStreamTicketService ticketService = Substitute.For<IStreamTicketService>();

    private GetTrackStreamQueryHandler CreateHandler(PlaybackConfiguration? playback = null)
    {
        ticketService.IssueTicket(Arg.Any<long?>(), Arg.Any<string>(), Arg.Any<long?>()).Returns(new StreamTicket("ticket-token", 60));

        var issuer = new TrackStreamIssuer(
            Database,
            ticketService,
            TestConfigurations.Track(),
            TestConfigurations.StreamGateway("https://stream.musify.test"),
            playback ?? TestConfigurations.Playback());

        return new GetTrackStreamQueryHandler(Database, issuer, playback ?? TestConfigurations.Playback(), NoOpLogger<GetTrackStreamQueryHandler>());
    }

    [Fact]
    public async Task Handle_ProcessedTrack_IssuesTicketAndRecordsListen()
    {
        var owner = TestEntities.User();
        var track = TestEntities.Track(owner);
        await SeedAsync(owner, track);

        var result = await CreateHandler().Handle(new GetTrackStreamQuery(track.Id, owner.Id), TestContext.Current.CancellationToken);

        Assert.False(result.IsError);
        Assert.Equal("ticket-token", result.Value.Ticket);
        Assert.Equal(60, result.Value.ExpiresInSeconds);
        Assert.Contains("audio-folder", result.Value.ManifestUrl);

        var history = Assert.Single(await Database.ListeningHistories.ToListAsync(TestContext.Current.CancellationToken));
        Assert.Equal(owner.Id, history.UserId);
        Assert.Equal(track.Id, history.TrackId);
        Assert.Equal(history.Id, result.Value.ListenId);
        Assert.False(history.IsCounted);
        Assert.Null(history.PlayedSeconds);
    }

    [Fact]
    public async Task Handle_TrackMissing_ReturnsNotFound()
    {
        var result = await CreateHandler().Handle(new GetTrackStreamQuery(Guid.NewGuid(), 1), TestContext.Current.CancellationToken);

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

    [Fact]
    public async Task Handle_AudioNotProcessedYet_ReturnsConflict()
    {
        var owner = TestEntities.User();
        var track = TestEntities.Track(owner, audio: TestEntities.PendingAudio());
        await SeedAsync(owner, track);

        var result = await CreateHandler().Handle(new GetTrackStreamQuery(track.Id, owner.Id), TestContext.Current.CancellationToken);

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

    [Fact]
    public async Task Handle_AnonymousUser_AnonymousListeningDisabled_ReturnsUnauthorized()
    {
        var owner = TestEntities.User();
        var track = TestEntities.Track(owner);
        await SeedAsync(owner, track);

        var handler = CreateHandler(TestConfigurations.Playback(allowAnonymousListening: false));

        var result = await handler.Handle(new GetTrackStreamQuery(track.Id, UserId: null), TestContext.Current.CancellationToken);

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

    [Fact]
    public async Task Handle_AnonymousUser_AnonymousListeningEnabled_IssuesTicketWithoutRecordingHistory()
    {
        var owner = TestEntities.User();
        var track = TestEntities.Track(owner);
        await SeedAsync(owner, track);

        var handler = CreateHandler(TestConfigurations.Playback(allowAnonymousListening: true));

        var result = await handler.Handle(new GetTrackStreamQuery(track.Id, UserId: null), TestContext.Current.CancellationToken);

        Assert.False(result.IsError);
        Assert.Equal("ticket-token", result.Value.Ticket);
        Assert.Empty(await Database.ListeningHistories.ToListAsync(TestContext.Current.CancellationToken));
    }
}