using TeleWave.Domain.Broadcast;
using Xunit;

namespace TeleWave.Domain.Tests.Broadcast;

public class ChannelShowTests
{
    private static ChannelShow NewShow() =>
        Channel
            .Create("c", "c", DateTimeOffset.UnixEpoch)
            .AddShow(Guid.NewGuid(), 1, BlockMode.Count, 1);

    [Fact]
    public void Create_HasDefaultPreferredMultiplier_AndNoWindows()
    {
        var cs = NewShow();

        Assert.Equal(ChannelShow.DefaultPreferredWeightMultiplier, cs.PreferredWeightMultiplier);
        Assert.Empty(cs.PreferredHours);
        Assert.True(cs.IsEnabled);
        Assert.Equal(0, cs.NextEpisodeIndex);
    }

    [Fact]
    public void Update_ChangesCoreFields()
    {
        var cs = NewShow();

        cs.Update(9, BlockMode.Duration, 45, false);

        Assert.Equal(9, cs.Weight);
        Assert.Equal(BlockMode.Duration, cs.BlockMode);
        Assert.Equal(45, cs.BlockValue);
        Assert.False(cs.IsEnabled);
    }

    [Fact]
    public void SetPreferredHours_ClampsMultiplier_AndNormalizesWindows()
    {
        var cs = NewShow();

        cs.SetPreferredHours(
            0, // < 1 → должно стать 1
            [
                (18, 23), // валидное
                (10, 10), // start == end → отбрасывается
                (5, 25), // end > 24 → отбрасывается
                (-1, 3), // start < 0 → отбрасывается
                (18, 23), // дубликат → схлопывается
            ]
        );

        Assert.Equal(1, cs.PreferredWeightMultiplier);
        var window = Assert.Single(cs.PreferredHours);
        Assert.Equal(18, window.StartHour);
        Assert.Equal(23, window.EndHour);
    }

    [Fact]
    public void SetPreferredHours_ReplacesPreviousSet()
    {
        var cs = NewShow();
        cs.SetPreferredHours(3, [(1, 2)]);
        cs.SetPreferredHours(2, [(8, 9), (20, 22)]);

        Assert.Equal(2, cs.PreferredWeightMultiplier);
        Assert.Equal(2, cs.PreferredHours.Count);
    }

    [Fact]
    public void IsPreferredAt_ChecksWindows()
    {
        var cs = NewShow();
        cs.SetPreferredHours(3, [(18, 23)]);

        Assert.True(cs.IsPreferredAt(18));
        Assert.True(cs.IsPreferredAt(22));
        Assert.False(cs.IsPreferredAt(23)); // конец исключается
        Assert.False(cs.IsPreferredAt(9));
    }

    [Fact]
    public void SetNextEpisodeIndex_MovesCursor()
    {
        var cs = NewShow();
        cs.SetNextEpisodeIndex(5);
        Assert.Equal(5, cs.NextEpisodeIndex);
    }
}