using Microsoft.EntityFrameworkCore;
using NSubstitute;
using TeleWave.Application.Broadcast;
using TeleWave.Application.Broadcast.Bumpers;
using TeleWave.Application.Broadcast.GetChannel;
using TeleWave.Application.Broadcast.GetSchedule;
using TeleWave.Application.Broadcast.ListChannels;
using TeleWave.Application.Common.Interfaces;
using TeleWave.Application.Library.DeleteShow;
using TeleWave.Application.Library.GetShow;
using TeleWave.Application.Media;
using TeleWave.Application.Programming.Groups;
using TeleWave.Application.Tests.Support;
using TeleWave.Domain.Broadcast;
using TeleWave.Domain.Library;
using TeleWave.Domain.Media;
using Xunit;

namespace TeleWave.Application.Tests.Broadcast;

public class QueryHandlersTests
{
    private static readonly DateTimeOffset T0 = new(2026, 1, 1, 0, 0, 0, TimeSpan.Zero);

    private static GroupMembershipCleaner GroupCleaner(IAppDbContext db) =>
        new(db, GroupServices.Stats(db));

    private static ShowMediaEraser Eraser(IAppDbContext db) =>
        new(db, Substitute.For<IMediaStorage>());

    [Fact]
    public async Task GetChannel_UnknownId_ReturnsNotFound()
    {
        var fixture = new TestDb();
        await using var db = fixture.New();
        var result = await new GetChannelQueryHandler(db).Handle(
            new GetChannelQuery(Guid.NewGuid()),
            CancellationToken.None
        );
        Assert.False(result.IsSuccess);
    }

    [Fact]
    public async Task ListChannels_ReturnsSummaries()
    {
        var fixture = new TestDb();
        await using (var seed = fixture.New())
        {
            seed.Channels.Add(Channel.Create("A", "a", T0));
            seed.Channels.Add(Channel.Create("B", "b", T0));
            await seed.SaveChangesAsync(CancellationToken.None);
        }

        await using var db = fixture.New();
        var result = await new ListChannelsQueryHandler(db).Handle(
            new ListChannelsQuery(),
            CancellationToken.None
        );
        Assert.Equal(2, result.Count);
    }

    [Fact]
    public async Task GetChannelSchedule_ReturnsEntriesWithBumperLabel()
    {
        var fixture = new TestDb();
        var channel = Channel.Create("c", "c", T0);
        var show = Show.Create("Show A", ShowKind.Series);
        var bumperTemplate = BumperTemplate.Create("Блок", "Текст 1");
        var variant = bumperTemplate.Variants[0];
        var asset = MediaAsset.Register("Show.A.S01E01.mkv", ".mkv", MediaSource.Upload);
        var bumperAsset = MediaAsset.RegisterGenerated("Блок: СЕЙЧАС / Show A");
        // Метка в расписании берётся из кэша заставки — там лежит ровно тот текст, что играл.
        var cache = BumperAsset.Create(
            bumperTemplate.Id,
            variant.Id,
            "sig",
            """[{"style":"Label","color":"Accent","text":"СЕЙЧАС"},{"style":"Title","color":"Text","text":"Show A"}]""",
            null,
            bumperAsset.Id
        );
        var program = ScheduleEntry.Program(
            channel.Id,
            asset.Id,
            T0,
            T0.AddMinutes(20),
            show.Id,
            0
        );
        var bumper = ScheduleEntry.Bumper(
            channel.Id,
            bumperAsset.Id,
            T0.AddMinutes(20),
            T0.AddMinutes(20).AddSeconds(8),
            show.Id,
            variant.Id
        );
        await using (var seed = fixture.New())
        {
            seed.Shows.Add(show);
            seed.Channels.Add(channel);
            seed.BumperTemplates.Add(bumperTemplate);
            seed.MediaAssets.Add(asset);
            seed.MediaAssets.Add(bumperAsset);
            seed.BumperAssets.Add(cache);
            seed.ScheduleEntries.Add(program);
            seed.ScheduleEntries.Add(bumper);
            await seed.SaveChangesAsync(CancellationToken.None);
        }

        await using var db = fixture.New();
        var result = await new GetChannelScheduleQueryHandler(db).Handle(
            new GetChannelScheduleQuery(channel.Id, T0.AddMinutes(-5), T0.AddHours(1)),
            CancellationToken.None
        );

        Assert.True(result.IsSuccess);
        Assert.Equal(2, result.Value.Count);
        var bumperDto = result.Value.Single(e => e.Kind == ScheduleEntryKind.Bumper);
        Assert.Equal("Текст 1", bumperDto.BumperName);
        Assert.Equal("СЕЙЧАС · Show A", bumperDto.BumperText);
    }

    [Fact]
    public async Task GetShow_ReturnsDtoOrNotFound()
    {
        var fixture = new TestDb();
        var show = Show.Create("A", ShowKind.Series);
        await using (var seed = fixture.New())
        {
            seed.Shows.Add(show);
            await seed.SaveChangesAsync(CancellationToken.None);
        }

        await using var db = fixture.New();
        var ok = await new GetShowQueryHandler(db).Handle(
            new GetShowQuery(show.Id),
            CancellationToken.None
        );
        Assert.True(ok.IsSuccess);

        var missing = await new GetShowQueryHandler(db).Handle(
            new GetShowQuery(Guid.NewGuid()),
            CancellationToken.None
        );
        Assert.False(missing.IsSuccess);
    }

    [Fact]
    public async Task DeleteShow_RemovesOrNotFound()
    {
        var fixture = new TestDb();
        var show = Show.Create("A", ShowKind.Series);
        await using (var seed = fixture.New())
        {
            seed.Shows.Add(show);
            await seed.SaveChangesAsync(CancellationToken.None);
        }

        await using var db = fixture.New();
        var missing = await new DeleteShowCommandHandler(db, GroupCleaner(db), Eraser(db)).Handle(
            new DeleteShowCommand(Guid.NewGuid()),
            CancellationToken.None
        );
        Assert.False(missing.IsSuccess);

        var ok = await new DeleteShowCommandHandler(db, GroupCleaner(db), Eraser(db)).Handle(
            new DeleteShowCommand(show.Id),
            CancellationToken.None
        );
        Assert.True(ok.IsSuccess);
    }
}