using System.Diagnostics;
using System.Runtime.InteropServices;
using WhiteMagic.Windows;
using Xunit;

namespace WhiteMagicTest.Windows;

public sealed class WindowTests
{
    [Fact]
    public void GetWindows_returns_at_least_one_top_level_window()
    {
        var windows = WindowFactory.GetWindows().ToList();
        Assert.NotEmpty(windows);
    }

    [Fact]
    public void GetWindowsByClassName_filters_to_matching_classes()
    {
        var all = WindowFactory.GetWindows().ToList();
        if (all.Count == 0)
            return;

        string firstClass = all[0].ClassName;
        if (string.IsNullOrEmpty(firstClass))
            return;

        var filtered = WindowFactory.GetWindowsByClassName(firstClass).ToList();
        Assert.All(filtered, w => Assert.Equal(firstClass, w.ClassName));
        Assert.True(filtered.Count <= all.Count);
    }

    [Fact]
    public void RemoteWindow_can_query_and_manipulate_a_test_window()
    {
        IntPtr handle = Process.GetCurrentProcess().MainWindowHandle;
        if (handle == IntPtr.Zero)
        {
            // The xUnit runner may not expose a main window; skip destructive
            // manipulation but still validate factory enumeration above.
            return;
        }

        var window = new RemoteWindow(handle);
        Assert.Equal(handle, window.Handle);

        string text = window.Text;
        Assert.NotNull(text);

        string originalTitle = window.Title;
        Assert.Equal(text, originalTitle);

        // Move and resize, then restore the original position.
        bool moved = window.MoveResize(10, 10, 400, 300);
        Assert.True(moved);

        bool flashed = window.Flash();
        Assert.True(flashed);

        // Restore a sensible size without asserting exact title restoration;
        // terminal windows often ignore SetWindowText.
        bool restored = window.MoveResize(0, 0, 800, 600);
        Assert.True(restored);
    }
}