using TeleWave.Domain.Broadcast;
using Xunit;

namespace TeleWave.Domain.Tests.Broadcast;

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

    private static Channel NewChannel() => Channel.Create("News", "news", Epoch);

    [Fact]
    public void Create_SetsDefaults_AndSeedsDefaultBumperTemplate()
    {
        var channel = NewChannel();

        Assert.NotEqual(Guid.Empty, channel.Id);
        Assert.Equal("News", channel.Name);
        Assert.Equal("news", channel.Slug);
        Assert.True(channel.IsEnabled);
        Assert.Equal(Epoch, channel.EpochUtc);
        Assert.Equal(AdInsertion.BetweenBlocks, channel.AdInsertion);
        Assert.False(channel.BumpersEnabled);
        Assert.Equal(BumperSelection.Rotation, channel.BumperSelection);
        Assert.Equal(1.0, channel.BumperShowChangeChance);
        Assert.Equal(1.0, channel.BumperEpisodeChangeChance);

        var template = Assert.Single(channel.BumperTemplates);
        Assert.True(template.IsDefault);
        Assert.Equal(0, template.Position);
        Assert.Single(template.Variants); // дефолтный подблок
    }

    [Fact]
    public void UpdateSettings_ChangesFields()
    {
        var channel = NewChannel();
        var filler = Guid.NewGuid();

        channel.UpdateSettings("N2", false, AdInsertion.BetweenEpisodes, 4, true, filler);

        Assert.Equal("N2", channel.Name);
        Assert.False(channel.IsEnabled);
        Assert.Equal(AdInsertion.BetweenEpisodes, channel.AdInsertion);
        Assert.Equal(4, channel.AdsPerBreak);
        Assert.True(channel.BumpersEnabled);
        Assert.Equal(filler, channel.FillerAssetId);
    }

    [Theory]
    [InlineData(-1, 2.0, -5.0, 1.0, 0.0)]
    [InlineData(30, 0.3, 0.9, 0.3, 0.9)]
    public void UpdateBumperSettings_ClampsChancesAndInterval(
        int interval,
        double show,
        double episode,
        double expectedShow,
        double expectedEpisode
    )
    {
        var channel = NewChannel();

        channel.UpdateBumperSettings(
            BumperFont.Serif,
            interval,
            BumperSelection.WeightedRandom,
            show,
            episode
        );

        Assert.Equal(BumperFont.Serif, channel.BumperFont);
        Assert.Equal(Math.Max(0, interval), channel.BumperMinIntervalMinutes);
        Assert.Equal(BumperSelection.WeightedRandom, channel.BumperSelection);
        Assert.Equal(expectedShow, channel.BumperShowChangeChance);
        Assert.Equal(expectedEpisode, channel.BumperEpisodeChangeChance);
    }

    [Fact]
    public void AddBumperTemplate_AppendsWithNextPosition()
    {
        var channel = NewChannel();

        var t1 = channel.AddBumperTemplate("Block 2");
        var t2 = channel.AddBumperTemplate("Block 3");

        Assert.Equal(1, t1.Position);
        Assert.Equal(2, t2.Position);
        Assert.False(t1.IsDefault);
        Assert.Equal(3, channel.BumperTemplates.Count);
        Assert.Equal(t1, channel.FindBumperTemplate(t1.Id));
        Assert.Null(channel.FindBumperTemplate(Guid.NewGuid()));
    }

    [Fact]
    public void RemoveBumperTemplate_CannotRemoveDefault_CanRemoveOthers()
    {
        var channel = NewChannel();
        var def = channel.BumperTemplates[0];
        var extra = channel.AddBumperTemplate("Block 2");

        Assert.False(channel.RemoveBumperTemplate(def.Id));
        Assert.True(channel.RemoveBumperTemplate(extra.Id));
        Assert.False(channel.RemoveBumperTemplate(Guid.NewGuid()));
        Assert.Single(channel.BumperTemplates);
    }

    [Fact]
    public void Shows_AddFindRemoveHas()
    {
        var channel = NewChannel();
        var showId = Guid.NewGuid();

        var cs = channel.AddShow(showId, 5, BlockMode.Count, 3);

        Assert.Equal(showId, cs.ShowId);
        Assert.Equal(5, cs.Weight);
        Assert.True(channel.HasShow(showId));
        Assert.Equal(cs, channel.FindShow(cs.Id));
        Assert.True(channel.RemoveShow(cs.Id));
        Assert.False(channel.RemoveShow(cs.Id));
        Assert.False(channel.HasShow(showId));
    }

    [Fact]
    public void Ads_AppendWithPosition_AndRemove()
    {
        var channel = NewChannel();
        var a1 = channel.AddAd(Guid.NewGuid());
        var a2 = channel.AddAd(Guid.NewGuid());

        Assert.Equal(0, a1.Position);
        Assert.Equal(1, a2.Position);
        Assert.True(channel.HasAd(a1.MediaAssetId));
        Assert.True(channel.RemoveAd(a1.Id));
        Assert.False(channel.RemoveAd(a1.Id));
    }

    [Fact]
    public void AddOverride_OneTime_AndWeekly()
    {
        var channel = NewChannel();

        var one = channel.AddOverride(OverrideMode.Exclusive, Epoch, Epoch.AddHours(2));
        Assert.Equal(OverrideRecurrence.OneTime, one.Recurrence);
        Assert.Equal(Epoch, one.StartsAtUtc);

        var weekly = channel.AddWeeklyOverride(OverrideMode.Boost, 6, 600, 720);
        Assert.Equal(OverrideRecurrence.Weekly, weekly.Recurrence);
        Assert.Equal(6, weekly.DayOfWeek);
        Assert.Equal(600, weekly.StartMinute);

        Assert.Equal(2, channel.Overrides.Count);
        Assert.True(channel.RemoveOverride(one.Id));
        Assert.False(channel.RemoveOverride(Guid.NewGuid()));
    }

    [Fact]
    public void Cursors_AreMovedBySetters()
    {
        var channel = NewChannel();
        channel.SetNextAdIndex(7);
        channel.SetNextBumperIndex(3);

        Assert.Equal(7, channel.NextAdIndex);
        Assert.Equal(3, channel.NextBumperIndex);
    }
}