// Copyright (c) 2010-2014 SharpDX - Alexandre Mutel
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Runtime.InteropServices;
using System.Security;
using SharpDX.IO;
using SharpDX.Mathematics.Interop;
using SharpDX.Win32;

namespace SharpDX
{
    /// <summary>
    /// Internal class to interact with Native Message
    /// </summary>
    partial class Win32Native
    {

        [DllImport("kernel32.dll", EntryPoint = "CreateFile", SetLastError = true, CharSet = CharSet.Unicode)]
        internal static extern IntPtr Create(
            string fileName,
            NativeFileAccess desiredAccess,
            NativeFileShare shareMode,
            IntPtr securityAttributes,
            NativeFileMode mode,
            NativeFileOptions flagsAndOptions,
            IntPtr templateFile);


        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        public struct TextMetric
        {
            public int tmHeight;
            public int tmAscent;
            public int tmDescent;
            public int tmInternalLeading;
            public int tmExternalLeading;
            public int tmAveCharWidth;
            public int tmMaxCharWidth;
            public int tmWeight;
            public int tmOverhang;
            public int tmDigitizedAspectX;
            public int tmDigitizedAspectY;
            public char tmFirstChar;
            public char tmLastChar;
            public char tmDefaultChar;
            public char tmBreakChar;
            public byte tmItalic;
            public byte tmUnderlined;
            public byte tmStruckOut;
            public byte tmPitchAndFamily;
            public byte tmCharSet;
        }


        [DllImport("user32.dll", EntryPoint = "PeekMessage")]
        public static extern int PeekMessage(out NativeMessage lpMsg, IntPtr hWnd, int wMsgFilterMin,
                                              int wMsgFilterMax, int wRemoveMsg);

        [DllImport("user32.dll", EntryPoint = "GetMessage")]
        public static extern int GetMessage(out NativeMessage lpMsg, IntPtr hWnd, int wMsgFilterMin,
                                             int wMsgFilterMax);

        [DllImport("user32.dll", EntryPoint = "TranslateMessage")]
        public static extern int TranslateMessage(ref NativeMessage lpMsg);

        [DllImport("user32.dll", EntryPoint = "DispatchMessage")]
        public static extern int DispatchMessage(ref NativeMessage lpMsg);

        public enum WindowLongType : int
        {
            WndProc = (-4),
            HInstance = (-6),
            HwndParent = (-8),
            Style = (-16),
            ExtendedStyle = (-20),
            UserData = (-21),
            Id = (-12)
        }

        public delegate IntPtr WndProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);

        public static IntPtr GetWindowLong(IntPtr hWnd, WindowLongType index)
        {
            if (IntPtr.Size == 4)
            {
                return GetWindowLong32(hWnd, index);
            }
            return GetWindowLong64(hWnd, index);
        }

        [DllImport("user32.dll", EntryPoint = "GetFocus", CharSet = CharSet.Unicode)]
        public static extern IntPtr GetFocus();

        [DllImport("user32.dll", EntryPoint = "GetWindowLong", CharSet = CharSet.Unicode)]
        private static extern IntPtr GetWindowLong32(IntPtr hwnd, WindowLongType index);

        [DllImport("user32.dll", EntryPoint = "GetWindowLongPtr", CharSet = CharSet.Unicode)]
        private static extern IntPtr GetWindowLong64(IntPtr hwnd, WindowLongType index);

        public static IntPtr SetWindowLong(IntPtr hwnd, WindowLongType index, IntPtr wndProcPtr)
        {
            if (IntPtr.Size == 4)
            {
                return SetWindowLong32(hwnd, index, wndProcPtr);
            }
            return SetWindowLongPtr64(hwnd, index, wndProcPtr);
        }

        [DllImport("user32.dll", EntryPoint = "SetParent", CharSet = CharSet.Unicode)]
        public static extern IntPtr SetParent(IntPtr hWnd, IntPtr hWndParent);

        [DllImport("user32.dll", EntryPoint = "SetWindowLong", CharSet = CharSet.Unicode)]
        private static extern IntPtr SetWindowLong32(IntPtr hwnd, WindowLongType index, IntPtr wndProc);


        public static bool ShowWindow(IntPtr hWnd, bool windowVisible)
        {
            return ShowWindow(hWnd, windowVisible ? 1 : 0);
        }

        [DllImport("user32.dll", EntryPoint = "ShowWindow", CharSet = CharSet.Unicode)]
        private static extern bool ShowWindow(IntPtr hWnd, int mCmdShow);

        [DllImport("user32.dll", EntryPoint = "SetWindowLongPtr", CharSet = CharSet.Unicode)]
        private static extern IntPtr SetWindowLongPtr64(IntPtr hwnd, WindowLongType index, IntPtr wndProc);

        [DllImport("user32.dll", EntryPoint = "CallWindowProc", CharSet = CharSet.Unicode)]
        public static extern IntPtr CallWindowProc(IntPtr wndProc, IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam);

        [DllImport("user32.dll", EntryPoint = "GetClientRect")]
        public static extern bool GetClientRect(IntPtr hWnd, out RawRectangle lpRect);

        [DllImport("kernel32.dll", EntryPoint = "GetModuleHandle", CharSet = CharSet.Unicode)]
        public static extern IntPtr GetModuleHandle(string lpModuleName);
    }
}