using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;

namespace Sheas_Cealer.Utils;

// 定义 IconRemover
internal static partial class IconRemover
{
    private const int GWL_EXSTYLE = -20;
    private const int WS_EX_DLGMODALFRAME = 0x0001;
    private const int SWP_NOSIZE = 0x0001;
    private const int SWP_NOMOVE = 0x0002;
    private const int SWP_NOZORDER = 0x0004;
    private const int SWP_FRAMECHANGED = 0x0020;
    private const uint WM_SETICON = 0x0080;

    [LibraryImport("user32.dll", EntryPoint = "GetWindowLongW")]
    private static partial int GetWindowLong(IntPtr hwnd, int index);
    [LibraryImport("user32.dll", EntryPoint = "SetWindowLongW")]
    private static partial int SetWindowLong(IntPtr hwnd, int index, int newStyle);
    [LibraryImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static partial bool SetWindowPos(IntPtr hwnd, IntPtr hwndInsertAfter, int x, int y, int width, int height, uint flags);
    [LibraryImport("user32.dll", EntryPoint = "SendMessageW")]
    private static partial IntPtr SendMessage(IntPtr hwnd, uint msg, IntPtr wParam, IntPtr lParam);

    internal static void RemoveIcon(Window window)
    {
        // 获取该窗口句柄
        IntPtr hwnd = new WindowInteropHelper(window).Handle;

        // 将窗口更改为不显示窗口图标
        _ = SetWindowLong(hwnd, GWL_EXSTYLE, GetWindowLong(hwnd, GWL_EXSTYLE) | WS_EX_DLGMODALFRAME);

        // 更新窗口的非客户区域来显示更改
        SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);

        // 防止自定义图标生效
        SendMessage(hwnd, WM_SETICON, new IntPtr(1), IntPtr.Zero);
        SendMessage(hwnd, WM_SETICON, IntPtr.Zero, IntPtr.Zero);
    }
}