using System;
using System.Runtime.InteropServices;

namespace MangaReader.Avalonia.Platform.Win.Interop
{
    /// <summary>
    /// Win32 API imports.
    /// </summary>
    internal static class WinApi
    {
        private const string User32 = "user32.dll";

        /// <summary>
        /// Creates, updates or deletes the taskbar icon.
        /// </summary>
        [DllImport("shell32.Dll", CharSet = CharSet.Unicode)]
        public static extern bool Shell_NotifyIcon(NotifyCommand cmd, [In] ref NotifyIconData data);


        /// <summary>
        /// Creates the helper window that receives messages from the taskar icon.
        /// </summary>
        [DllImport(User32, EntryPoint = "CreateWindowExW", SetLastError = true)]
        public static extern IntPtr CreateWindowEx(int dwExStyle, [MarshalAs(UnmanagedType.LPWStr)] string lpClassName,
            [MarshalAs(UnmanagedType.LPWStr)] string lpWindowName, int dwStyle, int x, int y,
            int nWidth, int nHeight, IntPtr hWndParent, IntPtr hMenu, IntPtr hInstance,
            IntPtr lpParam);


        /// <summary>
        /// Processes a default windows procedure.
        /// </summary>
        [DllImport(User32)]
        public static extern IntPtr DefWindowProc(IntPtr hWnd, uint msg, IntPtr wparam, IntPtr lparam);

        /// <summary>
        /// Registers the helper window class.
        /// </summary>
        [DllImport(User32, EntryPoint = "RegisterClassW", SetLastError = true)]
        public static extern short RegisterClass(ref WindowClass lpWndClass);

        /// <summary>
        /// Registers a listener for a window message.
        /// </summary>
        /// <param name="lpString"></param>
        /// <returns>uint</returns>
        [DllImport(User32, EntryPoint = "RegisterWindowMessageW")]
        public static extern uint RegisterWindowMessage([MarshalAs(UnmanagedType.LPWStr)] string lpString);

        /// <summary>
        /// Used to destroy the hidden helper window that receives messages from the
        /// taskbar icon.
        /// </summary>
        /// <param name="hWnd"></param>
        /// <returns>bool</returns>
        [DllImport(User32, SetLastError = true)]
        public static extern bool DestroyWindow(IntPtr hWnd);
    }
}