using AcDream.Core.World;
using Xunit;

namespace AcDream.Core.Tests.World;

public sealed class TeleportAnimSequencerTests
{
    // --- Task 1.1: type presence ---

    [Fact]
    public void Enums_HaveExpectedValues()
    {
        Assert.Equal(0, (int)TeleportAnimState.Off);
        Assert.Equal(1, (int)TeleportAnimState.WorldFadeOut);
        Assert.Equal(2, (int)TeleportAnimState.TunnelFadeIn);
        Assert.Equal(3, (int)TeleportAnimState.Tunnel);
        Assert.Equal(4, (int)TeleportAnimState.TunnelContinue);
        Assert.Equal(5, (int)TeleportAnimState.TunnelFadeOut);
        Assert.Equal(6, (int)TeleportAnimState.WorldFadeIn);

        _ = TeleportEntryKind.Portal;
        _ = TeleportEntryKind.Login;
        _ = TeleportEntryKind.Death;
        _ = TeleportEntryKind.Logout;

        _ = TeleportAnimEvent.PlayEnterSound;
        _ = TeleportAnimEvent.PlayExitSound;
        _ = TeleportAnimEvent.Place;
        _ = TeleportAnimEvent.FireLoginComplete;
        _ = TeleportAnimEvent.EnterTunnel;
    }

    [Fact]
    public void Snapshot_DefaultsAreOff_ClearAlpha()
    {
        var snap = new TeleportAnimSnapshot(
            TeleportAnimState.Off, FadeAlpha: 0f, ShowTunnel: false, ShowPleaseWait: false);
        Assert.Equal(TeleportAnimState.Off, snap.State);
        Assert.Equal(0f, snap.FadeAlpha);
        Assert.False(snap.ShowTunnel);
        Assert.False(snap.ShowPleaseWait);
    }

    // --- Task 1.2: Begin(), IsActive, initial state ---

    [Theory]
    [InlineData(TeleportEntryKind.Portal,  TeleportAnimState.Tunnel)]
    [InlineData(TeleportEntryKind.Login,   TeleportAnimState.Tunnel)]
    [InlineData(TeleportEntryKind.Death,   TeleportAnimState.Tunnel)]
    [InlineData(TeleportEntryKind.Logout,  TeleportAnimState.WorldFadeOut)]
    public void Begin_SetsCorrectStartState(TeleportEntryKind kind, TeleportAnimState expectedStart)
    {
        var seq = new TeleportAnimSequencer();
        Assert.False(seq.IsActive);

        seq.Begin(kind);

        Assert.True(seq.IsActive);
        Assert.Equal(expectedStart, seq.State);
    }

    [Fact]
    public void Begin_EmitsPlayEnterSoundOnFirstTick()
    {
        // PlayEnterSound is edge-triggered on the first Tick after Begin.
        var seq = new TeleportAnimSequencer();
        seq.Begin(TeleportEntryKind.Portal);
        var (_, events) = seq.Tick(dt: 0f, worldReady: false);
        Assert.Contains(TeleportAnimEvent.PlayEnterSound, events);
    }
}