using System;

using System.Runtime.InteropServices;

using Quicker.Public;

public class WindowStyler

{

    // 使用 uint 明确处理大数值

    [DllImport("user32.dll")]

    private static extern IntPtr GetForegroundWindow();

    [DllImport("user32.dll")]

    private static extern int GetWindowLong(IntPtr hWnd, int nIndex);

    [DllImport("user32.dll")]

    private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

    [DllImport("user32.dll")]

    private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter,

        int X, int Y, int cx, int cy, uint uFlags);

    // 十六进制显式声明 + uint 处理

    private const int GWL_STYLE = -16;

    private const uint WS_POPUP = 0x80000000u;    // 原值 2147483648

    private const uint WS_CAPTION = 0x00C00000u;

    private const uint WS_THICKFRAME = 0x00040000u;

    private const uint WS_SYSMENU = 0x00080000u;

    private const uint SWP_FRAMECHANGED = 0x0020;

    private const uint SWP_NOSIZE = 0x0001;

    private const uint SWP_NOMOVE = 0x0002;

    private const uint SWP_NOZORDER = 0x0004;

    private const uint SWP_NOOWNERZORDER = 0x0200;

    public static void Exec(IStepContext context)

    {

        try

        {

            IntPtr hWnd = GetForegroundWindow();

            if (hWnd == IntPtr.Zero)

                throw new InvalidOperationException("无法获取前台窗口句柄");

            // 获取当前样式（转换为 uint 处理位运算）

            uint currentStyle = (uint)GetWindowLong(hWnd, GWL_STYLE);

            // 移除边框和标题栏

            uint newStyle = currentStyle & ~(WS_CAPTION | WS_THICKFRAME | WS_SYSMENU);

            newStyle |= WS_POPUP;  // 添加无边框样式

            // 使用 unchecked 处理类型转换

            int result = SetWindowLong(hWnd, GWL_STYLE, unchecked((int)newStyle));

            if (result == 0)

                throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error());

            // 强制窗口重绘

            bool success = SetWindowPos(hWnd, IntPtr.Zero, 0, 0, 0, 0,

                SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOOWNERZORDER);

            if (!success)

                throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error());

        }

        catch (Exception ex)

        {

            // 增强错误信息输出

            throw new ApplicationException($"窗口样式修改失败: {ex.Message} [类型：{ex.GetType().Name}]");

        }

    }

}