using AcDream.App.UI;
using AcDream.App.UI.Layout;
namespace AcDream.App.Tests.UI;

public class UiButtonTests
{
    private static (uint, int, int) NoTex(uint _) => (0, 0, 0);
    private bool _clicked;

    [Fact]
    public void Click_InvokesOnClick()
    {
        var b = new UiButton(new ElementInfo { Type = 1, Width = 46, Height = 18 }, NoTex)
        { OnClick = () => _clicked = true };
        b.OnEvent(new UiEvent(0, null, UiEventType.Click));
        Assert.True(_clicked);
    }

    [Fact]
    public void NotClickThrough_SoItReceivesClicks()
    {
        var b = new UiButton(new ElementInfo { Type = 1 }, NoTex);
        Assert.False(b.ClickThrough);
    }

    [Fact]
    public void PointerTransitions_UseRetailNormalStates()
    {
        var b = ButtonWithStates("Normal", "Normal_rollover", "Normal_pressed");

        b.OnEvent(new UiEvent(0, b, UiEventType.HoverEnter));
        Assert.Equal("Normal_rollover", b.ActiveState);

        b.OnEvent(new UiEvent(0, b, UiEventType.MouseDown, Data1: 5, Data2: 5));
        Assert.Equal("Normal_pressed", b.ActiveState);

        b.OnEvent(new UiEvent(0, b, UiEventType.MouseMove, Data1: 50, Data2: 50));
        Assert.Equal("Normal_rollover", b.ActiveState);

        b.OnEvent(new UiEvent(0, b, UiEventType.MouseMove, Data1: 5, Data2: 5));
        Assert.Equal("Normal_pressed", b.ActiveState);

        b.OnEvent(new UiEvent(0, b, UiEventType.MouseUp, Data1: 5, Data2: 5));
        Assert.Equal("Normal_rollover", b.ActiveState);
    }

    [Fact]
    public void ToggleRelease_SelectsHighlightState()
    {
        var info = ButtonInfo("Normal", "Highlight");
        AddBoolProperty(info, 0x0Bu, true);
        var b = CreateButton(info);

        b.OnEvent(new UiEvent(0, b, UiEventType.MouseDown, Data1: 5, Data2: 5));
        b.OnEvent(new UiEvent(0, b, UiEventType.MouseUp, Data1: 5, Data2: 5));

        Assert.True(b.Selected);
        Assert.Equal("Highlight", b.ActiveState);
    }

    [Fact]
    public void DisabledProperty_SelectsGhostedAndSuppressesClick()
    {
        var info = ButtonInfo("Normal", "Ghosted");
        AddBoolProperty(info, 0x0Du, true);
        var b = CreateButton(info);
        b.OnClick = () => _clicked = true;

        b.OnEvent(new UiEvent(0, b, UiEventType.Click));

        Assert.False(b.Enabled);
        Assert.Equal("Ghosted", b.ActiveState);
        Assert.False(_clicked);
    }

    [Fact]
    public void MissingStandardState_PreservesCustomSemanticState()
    {
        var info = ButtonInfo("LockedUI");
        info.DefaultStateName = "LockedUI";
        var b = CreateButton(info);

        b.OnEvent(new UiEvent(0, b, UiEventType.HoverEnter));
        b.OnEvent(new UiEvent(0, b, UiEventType.MouseDown, Data1: 5, Data2: 5));

        Assert.Equal("LockedUI", b.ActiveState);
    }

    [Fact]
    public void HotClick_FiresImmediatelyRepeatsAndSuppressesReleaseClick()
    {
        var info = ButtonInfo("Normal");
        AddBoolProperty(info, 0x0Fu, true);
        AddFloatProperty(info, 0x10u, 0.10f);
        AddFloatProperty(info, 0x11u, 0.05f);
        int clicks = 0;
        var b = CreateButton(info);
        b.OnClick = () => clicks++;

        b.OnEvent(new UiEvent(0, b, UiEventType.MouseDown, Data1: 5, Data2: 5));
        Assert.Equal(1, clicks);
        b.OnGlobalUiTime(1.00);
        b.OnGlobalUiTime(1.09);
        Assert.Equal(1, clicks);
        b.OnGlobalUiTime(1.11);
        Assert.Equal(2, clicks);

        b.OnEvent(new UiEvent(0, b, UiEventType.MouseUp, Data1: 5, Data2: 5));
        b.OnEvent(new UiEvent(0, b, UiEventType.Click, Data1: 5, Data2: 5));
        Assert.Equal(2, clicks);
    }

    private static UiButton ButtonWithStates(params string[] states)
    {
        var info = ButtonInfo(states);
        AddBoolProperty(info, 0x13u, true);
        return CreateButton(info);
    }

    private static ElementInfo ButtonInfo(params string[] states)
    {
        var info = new ElementInfo { Type = 1, Width = 20, Height = 20 };
        uint file = 1;
        foreach (string state in states)
            info.StateMedia[state] = (file++, 1);
        if (states.Length > 0)
            info.DefaultStateName = states[0];
        return info;
    }

    private static void AddBoolProperty(ElementInfo info, uint id, bool value)
    {
        if (!info.States.TryGetValue(UiStateInfo.DirectStateId, out var state))
        {
            state = new UiStateInfo { Id = UiStateInfo.DirectStateId };
            info.States[UiStateInfo.DirectStateId] = state;
        }
        state.Properties.Values[id] = new UiPropertyValue
        {
            Kind = UiPropertyKind.Bool,
            BoolValue = value,
        };
    }

    private static void AddFloatProperty(ElementInfo info, uint id, float value)
    {
        if (!info.States.TryGetValue(UiStateInfo.DirectStateId, out var state))
        {
            state = new UiStateInfo { Id = UiStateInfo.DirectStateId };
            info.States[UiStateInfo.DirectStateId] = state;
        }
        state.Properties.Values[id] = new UiPropertyValue
        {
            Kind = UiPropertyKind.Float,
            FloatValue = value,
        };
    }

    private static UiButton CreateButton(ElementInfo info)
        => new(info, NoTex) { Width = info.Width, Height = info.Height };
}