using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Text;

using Autodesk.Windows;

namespace ShrlAlgo.Addin.Test;

/// <summary>
/// 全局鼠标监视器类，用于监视全局鼠标事件。
/// </summary>
internal class GlobalMouseWatcher
{
	private const int WH_MOUSE_LL = 14;
	private const int WM_LBUTTONDOWN = 0x0201;
	private const int WM_RBUTTONDOWN = 0x0204;

	private IntPtr _hookID = IntPtr.Zero;

	/// <summary>
	/// 构造函数，设置鼠标钩子。
	/// </summary>
	public GlobalMouseWatcher()
	{
		_hookID = SetHook(MouseHookCallback);
	}

	/// <summary>
	/// 析构函数，移除鼠标钩子。
	/// </summary>
	~GlobalMouseWatcher()
	{
		UnhookWindowsHookEx(_hookID);
	}

	/// <summary>
	/// 设置鼠标钩子。
	/// </summary>
	/// <param name="proc">钩子过程。</param>
	/// <returns>钩子的句柄。</returns>
	private IntPtr SetHook(HookProc proc)
	{
		using (var curProcess = Process.GetCurrentProcess())
		using (var curModule = curProcess.MainModule)
		{
			return SetWindowsHookEx(WH_MOUSE_LL, proc, GetModuleHandle(curModule.ModuleName), 0);
		}
	}

	/// <summary>
	/// 钩子过程的委托。
	/// </summary>
	private delegate IntPtr HookProc(int nCode, IntPtr wParam, IntPtr lParam);

	/// <summary>
	/// 鼠标钩子回调函数。
	/// </summary>
	private IntPtr MouseHookCallback(int nCode, IntPtr wParam, IntPtr lParam)
	{
		if (nCode >= 0 && wParam == (IntPtr)WM_RBUTTONDOWN)
		{
			CompleteMultiSelection();
		}
		return CallNextHookEx(_hookID, nCode, wParam, lParam);
	}

	#region Win32 API

	[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
	private static extern IntPtr SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hMod, uint dwThreadId);

	[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
	[return: MarshalAs(UnmanagedType.Bool)]
	private static extern bool UnhookWindowsHookEx(IntPtr hhk);

	[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
	private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);

	[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
	private static extern IntPtr GetModuleHandle(string lpModuleName);

	[DllImport("user32.dll", CharSet = CharSet.None, ExactSpelling = false)]
	private static extern bool EnumChildWindows(IntPtr hwndParent, CallBack lpEnumFunc, IntPtr lParam);

	[DllImport("user32.dll")]
	private static extern int SendMessage(IntPtr hWnd, int msg, int wParam, int lParam);

	[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
	private static extern int GetWindowText(IntPtr hWnd, StringBuilder lpText, int nCount);

	[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
	private static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);
	#endregion

	/// <summary>
	/// 回调函数的委托。
	/// </summary>
	public delegate bool CallBack(IntPtr hwnd, int lParam);

	/// <summary>
	/// 完成多选操作。
	/// </summary>
	private static void CompleteMultiSelection()
	{
		var rvtwindow = ComponentManager.ApplicationWindow;
		var list = new List<IntPtr>();
		var flag = EnumChildWindows(
			rvtwindow,
			(hwnd, l) =>
			{
				var windowText = new StringBuilder(200);
				GetWindowText(hwnd, windowText, windowText.Capacity);
				var className = new StringBuilder(200);
				GetClassName(hwnd, className, className.Capacity);
				if (
					(
						windowText.ToString().Equals("完成", StringComparison.Ordinal)
						|| windowText.ToString().Equals("Finish", StringComparison.Ordinal)
					) && className.ToString().Contains("Button")
				)
				{
					list.Add(hwnd);
					return false;
				}
				return true;
			},
			new IntPtr(0)
		);

		var complete = list.FirstOrDefault();
		SendMessage(complete, 245, 0, 0);
	}
}