using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;
using System.Runtime.InteropServices;

namespace PaintDotNet.SystemLayer.FileDlgExtenders.Win32Types
{
    #region WINDOWINFO

    [StructLayout(LayoutKind.Sequential)]
    internal struct WINDOWINFO
    {
        public UInt32 cbSize;
        public RECT rcWindow;
        public RECT rcClient;
        public UInt32 dwStyle;
        public UInt32 dwExStyle;
        public UInt32 dwWindowStatus;
        public UInt32 cxWindowBorders;
        public UInt32 cyWindowBorders;
        public UInt16 atomWindowType;
        public UInt16 wCreatorVersion;
    }
    #endregion

    #region POINT

    [StructLayout(LayoutKind.Sequential)]
    internal struct POINT
    {
        public int x;
        public int y;

        #region Constructors
        public POINT(int x, int y)
        {
            this.x = x;
            this.y = y;
        }

        public POINT(Point point)
        {
            x = point.X;
            y = point.Y;
        }
        #endregion
    }
    #endregion

    #region RECT

    [StructLayout(LayoutKind.Sequential)]
    internal struct RECT
    {
        public int left;
        public int top;
        public int right;
        public int bottom;

        #region Properties

        public POINT Location
        {
            get { return new POINT((int)left, (int)top); }
            set
            {
                right -= (left - value.x);
                bottom -= (bottom - value.y);
                left = value.x;
                top = value.y;
            }
        }

        internal uint Width
        {
            get { return (uint)Math.Abs(right - left); }
            set { right = left + (int)value; }
        }

        internal uint Height
        {
            get { return (uint)Math.Abs(bottom - top); }
            set { bottom = top + (int)value; }
        }
        #endregion

        #region Overrides
        public override string ToString()
        {
            return left + ":" + top + ":" + right + ":" + bottom;
        }
        #endregion
    }
    #endregion

    #region WINDOWPOS

    [StructLayout(LayoutKind.Sequential)]
    internal struct WINDOWPOS
    {
        public IntPtr hwnd;
        public IntPtr hwndAfter;
        public int x;
        public int y;
        public int cx;
        public int cy;
        public uint flags;

        #region Overrides
        public override string ToString()
        {
            return x + ":" + y + ":" + cx + ":" + cy + ":" + ((SWP_Flags)flags).ToString();
        }
        #endregion
    }
    #endregion

    //#region NCCALCSIZE_PARAMS
    //internal struct NCCALCSIZE_PARAMS
    //{
    //    public RECT     rgrc1;
    //    public RECT     rgrc2;
    //    public RECT     rgrc3;
    //    public IntPtr   lppos;
    //}
    //#endregion

    #region NMHDR

    [StructLayout(LayoutKind.Sequential)]
    internal struct NMHDR
    {
        public IntPtr hwndFrom;
        public IntPtr idFrom;
        public uint code;
    }
    #endregion
    #region NMHEADER
    [StructLayout(LayoutKind.Sequential)]
    internal struct NMHEADER
    {
        internal NMHDR hdr;
        internal int iItem;
        internal int iButton;
        internal IntPtr pItem;
    }
    #endregion
    #region OPENFILENAME

    /// <summary>
    /// Defines the shape of hook procedures that can be called by the OpenFileDialog
    /// </summary>
    internal delegate IntPtr OfnHookProc(IntPtr hWnd, UInt16 msg, Int32 wParam, Int32 lParam);
    /// <summary>
    /// See the documentation for OPENFILENAME
    /// </summary>
    //typedef struct tagOFN { 
    //  DWORD         lStructSize; 
    //  HWND          hwndOwner; 
    //  HINSTANCE     hInstance; 
    //  LPCTSTR       lpstrFilter; 
    //  LPTSTR        lpstrCustomFilter; 
    //  DWORD         nMaxCustFilter; 
    //  DWORD         nFilterIndex; 
    //  LPTSTR        lpstrFile; 
    //  DWORD         nMaxFile; 
    //  LPTSTR        lpstrFileTitle; 
    //  DWORD         nMaxFileTitle; 
    //  LPCTSTR       lpstrInitialDir; 
    //  LPCTSTR       lpstrTitle; 
    //  DWORD         Flags; 
    //  WORD          nFileOffset; 
    //  WORD          nFileExtension; 
    //  LPCTSTR       lpstrDefExt; 
    //  LPARAM        lCustData; 
    //  LPOFNHOOKPROC lpfnHook; 
    //  LPCTSTR       lpTemplateName; 
    //#if (_WIN32_WINNT >= 0x0500)
    //  void *        pvReserved;
    //  DWORD         dwReserved;
    //  DWORD         FlagsEx;
    //#endif // (_WIN32_WINNT >= 0x0500)
    //} OPENFILENAME, *LPOPENFILENAME;
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    internal struct OPENFILENAME
    {
        public UInt32 lStructSize;
        public IntPtr hwndOwner;
        public IntPtr hInstance;
        public String lpstrFilter;
        public String lpstrCustomFilter;
        public UInt32 nMaxCustFilter;
        public Int32 nFilterIndex;
        public String lpstrFile;
        public UInt32 nMaxFile;
        public String lpstrFileTitle;
        public UInt32 nMaxFileTitle;
        public String lpstrInitialDir;
        public String lpstrTitle;
        public UInt32 Flags;
        public UInt16 nFileOffset;
        public UInt16 nFileExtension;
        public String lpstrDefExt;
        public IntPtr lCustData;
        public OfnHookProc lpfnHook;
        public String lpTemplateName;
        public IntPtr pvReserved;
        public UInt32 dwReserved;
        public UInt32 FlagsEx;
    };
    #endregion
    #region OFNOTIFY

    [StructLayout(LayoutKind.Sequential)]
    internal struct OFNOTIFY
    {
        public NMHDR hdr;
        public IntPtr OpenFileName;
        public IntPtr fileNameShareViolation;
    }
    #endregion
}