/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            nativewindow_win32.cc
 *
 *  Fri Dec 28 18:45:52 CET 2012
 *  Copyright 2012 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of DrumGizmo.
 *
 *  DrumGizmo is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  DrumGizmo is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with DrumGizmo; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "nativewindow_win32.h"

#ifdef WIN32

#include "window.h"

LRESULT CALLBACK dialogProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
{
  GUI::NativeWindowWin32 *native =
    (GUI::NativeWindowWin32 *)GetWindowLong(hwnd, GWL_USERDATA);

  // NOTE: 'native' is NULL intil the WM_CREATE message has been handled. 
  if(!native) return DefWindowProc(hwnd, msg, wp, lp);

  GUI::Window *window = native->window;

	switch(msg) {
	case WM_SIZE:
    {
      static bool first = true;
      if(!first) {
        GUI::ResizeEvent *e = new GUI::ResizeEvent();
        e->width = LOWORD(lp);
        e->height = HIWORD(lp);
        native->event = e;
        first = false;
      }
    }
		break;

	case WM_MOVE:
    {
//      GUI::MoveEvent *e = new GUI::MoveEvent();
//      e->x = (int)(short) LOWORD(lp);
//      e->y = (int)(short) HIWORD(lp);
//      native->event = e;
    }
		break;

	case WM_CLOSE:
    {
      GUI::CloseEvent *e = new GUI::CloseEvent();
      native->event = e;
    }
    break;
//		HWND child, old;
//		old	= 0;

//		numDialogs--;

//		while(old != (child = GetNextDlgGroupItem(hwnd, hwnd, false))) {
//			old = child;
//			EndDialog(child, 0);
//		}

//		if(numDialogs) EndDialog(hwnd, 0);
//		else PostQuitMessage(0);
//		return 0;
	case WM_MOUSEMOVE:
    {
      
      GUI::MouseMoveEvent *e = new GUI::MouseMoveEvent();
      e->x = (int)(short) LOWORD(lp);
      e->y = (int)(short) HIWORD(lp);
      native->event = e;
    }
		break;

	case WM_MOUSEWHEEL:
    {
      GUI::ScrollEvent *e = new GUI::ScrollEvent();

      // NOTE: lp is coordinates in screen space, not client space.
      POINT p;
      p.x = (int)(short) LOWORD(lp);
      p.y = (int)(short) HIWORD(lp);
      ScreenToClient(hwnd, &p);

      e->x = p.x;
      e->y = p.y;
      e->delta = -1 * (short)HIWORD(wp) / 60;
      native->event = e;
    }
 		break;

	case WM_LBUTTONUP:
	case WM_LBUTTONDBLCLK:
	case WM_LBUTTONDOWN:
	case WM_RBUTTONUP:
	case WM_RBUTTONDBLCLK:
	case WM_RBUTTONDOWN:
	case WM_MBUTTONUP:
	case WM_MBUTTONDBLCLK:
	case WM_MBUTTONDOWN:
    {
      GUI::ButtonEvent *e = new GUI::ButtonEvent();
      e->x = (int)(short) LOWORD(lp);
      e->y = (int)(short) HIWORD(lp);

      if(msg == WM_LBUTTONUP ||
         msg == WM_LBUTTONDBLCLK ||
         msg == WM_LBUTTONDOWN) e->button = 0;

      if(msg == WM_RBUTTONUP ||
         msg == WM_RBUTTONDBLCLK ||
         msg == WM_RBUTTONDOWN) e->button = 1;

      if(msg == WM_MBUTTONUP ||
         msg == WM_MBUTTONDBLCLK ||
         msg == WM_MBUTTONDOWN) e->button = 2;

      e->direction = 0;
      if(msg == WM_LBUTTONUP ||
         msg == WM_RBUTTONUP ||
         msg == WM_MBUTTONUP) e->direction = -1;

      if(msg == WM_LBUTTONDOWN ||
         msg == WM_RBUTTONDOWN ||
         msg == WM_MBUTTONDOWN) e->direction = 1;

      e->doubleclick = (msg == WM_LBUTTONDBLCLK ||
                        msg == WM_RBUTTONDBLCLK ||
                        msg == WM_MBUTTONDBLCLK);

      native->event = e;
    }
		break;

	case WM_KEYDOWN:
    {
      GUI::KeyEvent *e = new GUI::KeyEvent();
      //printf("wp: %d\n", wp);
      switch(wp) {
      case 37: e->keycode = GUI::KeyEvent::KEY_LEFT; break;
      case 39: e->keycode = GUI::KeyEvent::KEY_RIGHT; break;
      case 38: e->keycode = GUI::KeyEvent::KEY_UP; break;
      case 40: e->keycode = GUI::KeyEvent::KEY_DOWN; break;
      case 8: e->keycode = GUI::KeyEvent::KEY_BACKSPACE; break;
      case 46: e->keycode = GUI::KeyEvent::KEY_DELETE; break;
      case 36: e->keycode = GUI::KeyEvent::KEY_HOME; break;
      case 35: e->keycode = GUI::KeyEvent::KEY_END; break;
      case 33: e->keycode = GUI::KeyEvent::KEY_PGUP; break;
      case 34: e->keycode = GUI::KeyEvent::KEY_PGDOWN; break;
      case 13: e->keycode = GUI::KeyEvent::KEY_ENTER; break;
      default: e->keycode = GUI::KeyEvent::KEY_UNKNOWN; break;
      }
      e->text = "";
      e->direction = -1;
      native->event = e;
    }
		break;

	case WM_CHAR:
    {
      //printf("WM_CHAR %d %d\n", (int)lp, (int)wp);
      if(wp >= ' ') { // Filter control chars.
        GUI::KeyEvent *e = new GUI::KeyEvent();
        e->keycode = GUI::KeyEvent::KEY_CHARACTER;
        e->text += (char)wp;
        e->direction = -1;
        native->event = e;
      }
    }
		break;

	case WM_PAINT:
    {
      GUI::RepaintEvent *e = new GUI::RepaintEvent();
      e->x = 0;
      e->y = 0;
      e->width = 100;
      e->height = 100;
      native->event = e;

      // Move to window.h (in class)
      HDC pDC;
      HBITMAP old;
      HBITMAP ourbitmap;
      int * framebuf;
      GUI::PixelBuffer &px = window->wpixbuf;

      { // Create bitmap (move to window.cc)
        HDC hDC;
        BITMAPINFO bitmapinfo;
        hDC = CreateCompatibleDC(NULL);
        bitmapinfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
        bitmapinfo.bmiHeader.biWidth = px.width;
        bitmapinfo.bmiHeader.biHeight = -px.height; /* top-down */
        bitmapinfo.bmiHeader.biPlanes = 1;
        bitmapinfo.bmiHeader.biBitCount = 32;
        bitmapinfo.bmiHeader.biCompression = BI_RGB;
        bitmapinfo.bmiHeader.biSizeImage = 0;
        bitmapinfo.bmiHeader.biClrUsed = 256;
        bitmapinfo.bmiHeader.biClrImportant = 256;
        ourbitmap=CreateDIBSection(hDC, &bitmapinfo,
                                   DIB_RGB_COLORS, (void**)&framebuf, 0, 0);
        pDC=CreateCompatibleDC(NULL);
        old = (HBITMAP__*)SelectObject(pDC, ourbitmap);
        DeleteDC(hDC);
      }

      { // Copy GUI::PixelBuffer to framebuffer (move to window.cc)
        int i,j,k;
        for (k=0,i=0;i<(int)px.height;i++) {
          for (j=0;j<(int)px.width;j++,k++) {
            *(framebuf+k)=RGB(px.buf[(j + i * px.width) * 3 + 2],
                              px.buf[(j + i * px.width) * 3 + 1],
                              px.buf[(j + i * px.width) * 3 + 0]);
          }
        }
      }
      
      PAINTSTRUCT	ps;
      HDC	hdc = BeginPaint(native->m_hwnd, &ps);
      BitBlt(hdc, 0, 0, px.width, px.height, pDC, 0, 0, SRCCOPY);
      EndPaint(native->m_hwnd, &ps);

      { // Destroy bitmap (move to window.cc)
        SelectObject(pDC,old);
        DeleteDC(pDC);
        DeleteObject(ourbitmap);
        
      }
    }
		return DefWindowProc(hwnd, msg, wp, lp);
	}

	return DefWindowProc(hwnd, msg, wp, lp);
}

// Delared in eventhandler.cc
LRESULT CALLBACK dialogProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp);

GUI::NativeWindowWin32::NativeWindowWin32(GUI::Window *window)
  : GUI::NativeWindow()
{
  this->window = window;

	WNDCLASSEX wcex;
	WNDID wndId;

	m_hwnd = 0;
	m_className = NULL;
  event = NULL;

	memset(&wcex, 0, sizeof(wcex));
	
	//Time to register a window class.
  //Generic flags and everything. cbWndExtra is the size of a pointer to an
  // object - we need this in the wndproc handler.
	
	wcex.cbSize = sizeof(WNDCLASSEX);
	wcex.style = CS_DBLCLKS;//class_style;
	wcex.lpfnWndProc = (WNDPROC)dialogProc;
  wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
  // Set data:
	wcex.cbWndExtra = sizeof(NativeWindowWin32*); // Size of data.
	wcex.hInstance = GetModuleHandle(NULL);

  //	if(ex_style && WS_EX_TRANSPARENT == WS_EX_TRANSPARENT) {
  //		wcex.hbrBackground = NULL;
  //	} else {
  wcex.hbrBackground = NULL;//(HBRUSH) COLOR_BACKGROUND + 1;
  //	}
	
	wcex.lpszClassName = m_className = strdup("DrumGizmoClass");

	RegisterClassEx(&wcex);

  /*
	if(parent) {
		style = style | WS_CHILD;
		wndId = parent->getWndId();
	} else {
  */
  //style = style | WS_OVERLAPPEDWINDOW;
		wndId = 0;
    //	}

	m_hwnd = CreateWindowEx(0/*ex_style*/, m_className,
                          "DGBasisWidget",
                          (WS_OVERLAPPEDWINDOW | WS_VISIBLE),
                          window->x(), window->y(),
                          window->width(), window->height(),
                          wndId, NULL,
                          GetModuleHandle(NULL), NULL);

	SetWindowLongPtr(m_hwnd, GWL_USERDATA, (LONG_PTR)this);
}

GUI::NativeWindowWin32::~NativeWindowWin32()
{
	UnregisterClass(m_className, GetModuleHandle(NULL));
	free(m_className);
}

void GUI::NativeWindowWin32::setFixedSize(int width, int height)
{
  resize(width, height);
  LONG style =  GetWindowLong(m_hwnd, GWL_STYLE);
  style &= ~(WS_THICKFRAME | WS_MAXIMIZEBOX);
  SetWindowLong(m_hwnd, GWL_STYLE, style);
}

void GUI::NativeWindowWin32::resize(int width, int height)
{
  SetWindowPos(m_hwnd, NULL, -1, -1, (int)width, (int)height, SWP_NOMOVE);
  RECT r;
  GetClientRect(m_hwnd, &r);
  int w = width - r.right;
  int h = height - r.bottom;

  SetWindowPos(m_hwnd, NULL, -1, -1, width + w, height + h, SWP_NOMOVE);
}

void GUI::NativeWindowWin32::move(int x, int y)
{
  SetWindowPos(m_hwnd, NULL, (int)x, (int)y, -1, -1, SWP_NOSIZE);
}

void GUI::NativeWindowWin32::show()
{
  ShowWindow(m_hwnd, SW_SHOW);
}

void GUI::NativeWindowWin32::handleBuffer()
{
}

void GUI::NativeWindowWin32::hide()
{
  ShowWindow(m_hwnd, SW_HIDE);
}

void GUI::NativeWindowWin32::redraw()
{
  RedrawWindow(m_hwnd, NULL, NULL, RDW_ERASE|RDW_INVALIDATE);
  UpdateWindow(m_hwnd);
}

void GUI::NativeWindowWin32::setCaption(const std::string &caption)
{
  SetWindowText(m_hwnd, caption.c_str());
}

void GUI::NativeWindowWin32::grabMouse(bool grab)
{
  if(grab) SetCapture(m_hwnd);
  else ReleaseCapture();
}

bool GUI::NativeWindowWin32::hasEvent()
{
	MSG	msg;
  return PeekMessage(&msg, NULL, 0, 0, 0) != 0;
}

GUI::Event *GUI::NativeWindowWin32::getNextEvent()
{
  Event *event = NULL;

	MSG	msg;
	if(GetMessage(&msg, NULL, 0, 0)) {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
	}

  event = this->event;
  this->event = NULL;

  return event;
}

#endif/*WIN32*/