using XFESystem.Core;
using XFESystem.Desktop;
using Xunit;

namespace XFESystem.Desktop.Tests;

public sealed class PointerReleaseTests
{
    [Theory]
    [InlineData(false)]
    [InlineData(true)]
    public void TitleDragAppliesTheReleasePositionAndThenRetiresCapture(bool intermediateMotion)
    {
        var desktop = new DesktopSession(new Canvas(), new MemoryWorkspace(seed: false));
        var window = desktop.Open(DesktopApplication.Files);
        var original = window.Bounds;
        int x = original.X + 110, y = original.Y + 16;
        desktop.Pointer(x, y, true, timestampMs: 1000);
        if (intermediateMotion) desktop.Pointer(x + 17, y + 9, true, timestampMs: 1020);

        // A device can report the final motion and button break in one packet.
        desktop.Pointer(x + 40, y + 30, false, timestampMs: 1040);
        var expected = original with { X = original.X + 40, Y = original.Y + 30 };
        Assert.Equal(expected, window.Bounds);
        Assert.Equal(expected, window.RestoreBounds);
        Assert.True(desktop.NeedsRender);

        desktop.Pointer(x + 90, y + 80, false, timestampMs: 1060);
        Assert.Equal(expected, window.Bounds);
    }

    [Theory]
    [InlineData(false)]
    [InlineData(true)]
    public void CornerResizeAppliesTheReleasePositionAndThenRetiresCapture(bool intermediateMotion)
    {
        var desktop = new DesktopSession(new Canvas(), new MemoryWorkspace(seed: false));
        var window = desktop.Open(DesktopApplication.Files);
        var original = window.Bounds;
        int x = original.X + original.Width - 5, y = original.Y + original.Height - 5;
        desktop.Pointer(x, y, true, timestampMs: 1000);
        if (intermediateMotion) desktop.Pointer(x + 17, y + 9, true, timestampMs: 1020);

        desktop.Pointer(x + 48, y + 25, false, timestampMs: 1040);
        var expected = original with { Width = original.Width + 48, Height = original.Height + 25 };
        Assert.Equal(expected, window.Bounds);
        Assert.Equal(expected, window.RestoreBounds);
        Assert.True(desktop.NeedsRender);

        desktop.Pointer(x + 90, y + 80, false, timestampMs: 1060);
        Assert.Equal(expected, window.Bounds);
    }

    [Theory]
    [InlineData(false)]
    [InlineData(true)]
    public void LostReportsCancelCaptureBeforeAReleaseWithDifferentCoordinates(bool resize)
    {
        var desktop = new DesktopSession(new Canvas(), new MemoryWorkspace(seed: false));
        var window = desktop.Open(DesktopApplication.Files);
        var original = window.Bounds;
        int x = resize ? original.X + original.Width - 5 : original.X + 110;
        int y = resize ? original.Y + original.Height - 5 : original.Y + 16;
        desktop.Pointer(x, y, true, timestampMs: 1000);

        // Report loss has no reliable displacement; it must cancel the old grab.
        desktop.PointerReportsLost(x + 30, y + 20, true, timestampMs: 1020);
        desktop.Pointer(x + 40, y + 30, false, timestampMs: 1040);
        Assert.Equal(original, window.Bounds);
        Assert.Equal(original, window.RestoreBounds);
    }

    private sealed class Canvas : IDesktopCanvas
    {
        public int Width => 1920;
        public int Height => 1080;
        public void Fill(uint rgb, int x, int y, int width, int height) { }
        public void Line(uint rgb, int x1, int y1, int x2, int y2) { }
        public void Text(string text, uint rgb, int x, int y) { }
        public void Present() { }
    }
}