/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2008 Renato Araujo Oliveira Filho <renatox@gmail.com>
Copyright (c) 2000-2009 Torus Knot Software Ltd

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.
--------------------------------------------------------------------------*/

#include "OgreRoot.h"
#include "OgreException.h"
#include "OgreLogManager.h"
#include "OgreStringConverter.h"
#include "OgreWindowEventUtilities.h"

#include "OgreGLESPrerequisites.h"
#include "OgreGLESRenderSystem.h"

#include "OgreWin32EGLSupport.h"
#include "OgreWin32EGLWindow.h"
#include "OgreWin32EGLContext.h"

#include <iostream>
#include <algorithm>
#include <climits>


namespace Ogre {
    Win32EGLWindow::Win32EGLWindow(Win32EGLSupport *glsupport)
		: EGLWindow(glsupport)
    {
		mGLSupport = glsupport;
		mNativeDisplay = glsupport->getNativeDisplay();
    }

    Win32EGLWindow::~Win32EGLWindow()
    {
    }

	EGLContext * Win32EGLWindow::createEGLContext() const
	{
		return new Win32EGLContext(mEglDisplay, mGLSupport, mEglConfig, mEglSurface);
	}

	void Win32EGLWindow::getLeftAndTopFromNativeWindow( int & left, int & top, uint width, uint height )
	{

	}

	void Win32EGLWindow::initNativeCreatedWindow(const NameValuePairList *miscParams)
	{

	}

	void Win32EGLWindow::createNativeWindow( int &left, int &top, uint &width, uint &height, String &title )
	{
		// destroy current window, if any
		if (mWindow)
			destroy();

#ifdef OGRE_STATIC_LIB
		HINSTANCE hInst = GetModuleHandle( NULL );
#else
#  if OGRE_DEBUG_MODE == 1
		HINSTANCE hInst = GetModuleHandle("RenderSystem_GLES_d.dll");
#  else
		HINSTANCE hInst = GetModuleHandle("RenderSystem_GLES.dll");
#  endif
#endif

		mWindow = 0;
		mClosed = false;		
		mColourDepth = mIsFullScreen? 32 : GetDeviceCaps(GetDC(0), BITSPIXEL);
		HWND parent = 0;
		bool vsync = false;
		String border;
		bool outerSize = false;
		bool hwGamma = false;
		int monitorIndex = -1;
		HMONITOR hMonitor = NULL;


		if (!mIsExternal)
		{
			DWORD		  dwStyle = WS_VISIBLE | WS_CLIPCHILDREN;
			DWORD		  dwStyleEx = 0;					
			MONITORINFOEX monitorInfoEx;
			RECT		  rc;

			// If we didn't specified the adapter index, or if it didn't find it
			if (hMonitor == NULL)
			{
				POINT windowAnchorPoint;

				// Fill in anchor point.
				windowAnchorPoint.x = left;
				windowAnchorPoint.y = top;


				// Get the nearest monitor to this window.
				hMonitor = MonitorFromPoint(windowAnchorPoint, MONITOR_DEFAULTTONEAREST);
			}

			// Get the target monitor info		
			memset(&monitorInfoEx, 0, sizeof(MONITORINFOEX));
			monitorInfoEx.cbSize = sizeof(MONITORINFOEX);
			GetMonitorInfo(hMonitor, &monitorInfoEx);

			//size_t devNameLen = strlen(monitorInfoEx.szDevice);
			//mDeviceName = new char[devNameLen + 1];

			//strcpy(mDeviceName, monitorInfoEx.szDevice);			


			// No specified top left -> Center the window in the middle of the monitor
			if (left == -1 || top == -1)
			{				
				int screenw = monitorInfoEx.rcMonitor.right  - monitorInfoEx.rcMonitor.left;
				int screenh = monitorInfoEx.rcMonitor.bottom - monitorInfoEx.rcMonitor.top;

				SetRect(&rc, 0, 0, width, height);
				AdjustWindowRect(&rc, dwStyle, false);

				// clamp window dimensions to screen size
				int outerw = (rc.right-rc.left < screenw)? rc.right-rc.left : screenw;
				int outerh = (rc.bottom-rc.top < screenh)? rc.bottom-rc.top : screenh;

				if (left == -1)
					left = monitorInfoEx.rcMonitor.left + (screenw - outerw) / 2;
				else if (monitorIndex != -1)
					left += monitorInfoEx.rcMonitor.left;

				if (top == -1)
					top = monitorInfoEx.rcMonitor.top + (screenh - outerh) / 2;
				else if (monitorIndex != -1)
					top += monitorInfoEx.rcMonitor.top;
			}
			else if (monitorIndex != -1)
			{
				left += monitorInfoEx.rcMonitor.left;
				top += monitorInfoEx.rcMonitor.top;
			}

			mWidth = width;
			mHeight = height;
			mTop = top;
			mLeft = left;

			if (mIsFullScreen)
			{
				dwStyle |= WS_POPUP;
				dwStyleEx |= WS_EX_TOPMOST;
				mTop = monitorInfoEx.rcMonitor.top;
				mLeft = monitorInfoEx.rcMonitor.left;											
			}
			else
			{				
				if (parent)
				{
					dwStyle |= WS_CHILD;
				}
				else
				{
					if (border == "none")
						dwStyle |= WS_POPUP;
					else if (border == "fixed")
						dwStyle |= WS_OVERLAPPED | WS_BORDER | WS_CAPTION |
						WS_SYSMENU | WS_MINIMIZEBOX;
					else
						dwStyle |= WS_OVERLAPPEDWINDOW;
				}

				int screenw = GetSystemMetrics(SM_CXSCREEN);
				int screenh = GetSystemMetrics(SM_CYSCREEN);

				if (!outerSize)
				{
					// Calculate window dimensions required
					// to get the requested client area
					SetRect(&rc, 0, 0, mWidth, mHeight);
					AdjustWindowRect(&rc, dwStyle, false);
					mWidth = rc.right - rc.left;
					mHeight = rc.bottom - rc.top;

					// Clamp window rect to the nearest display monitor.
					if (mLeft < monitorInfoEx.rcMonitor.left)
						mLeft = monitorInfoEx.rcMonitor.left;		

					if (mTop < monitorInfoEx.rcMonitor.top)					
						mTop = monitorInfoEx.rcMonitor.top;					

					if ((int)mWidth > monitorInfoEx.rcMonitor.right - mLeft)					
						mWidth = monitorInfoEx.rcMonitor.right - mLeft;	

					if ((int)mHeight > monitorInfoEx.rcMonitor.bottom - mTop)					
						mHeight = monitorInfoEx.rcMonitor.bottom - mTop;		
				}			
			}

			// register class and create window
			WNDCLASS wc = { CS_OWNDC, WindowEventUtilities::_WndProc, 0, 0, hInst,
				LoadIcon(NULL, IDI_APPLICATION), LoadCursor(NULL, IDC_ARROW),
				(HBRUSH)GetStockObject(BLACK_BRUSH), NULL, "OgreGLWindow" };
			RegisterClass(&wc);

			if (mIsFullScreen)
			{
				DEVMODE displayDeviceMode;

				memset(&displayDeviceMode, 0, sizeof(displayDeviceMode));
				displayDeviceMode.dmSize = sizeof(DEVMODE);
				displayDeviceMode.dmBitsPerPel = mColourDepth;
				displayDeviceMode.dmPelsWidth = mWidth;
				displayDeviceMode.dmPelsHeight = mHeight;
				displayDeviceMode.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
/*
				if (mDisplayFrequency)
				{
					displayDeviceMode.dmDisplayFrequency = mDisplayFrequency;
					displayDeviceMode.dmFields |= DM_DISPLAYFREQUENCY;
					if (ChangeDisplaySettingsEx(mDeviceName, &displayDeviceMode, NULL, CDS_FULLSCREEN | CDS_TEST, NULL) != DISP_CHANGE_SUCCESSFUL)
					{
						LogManager::getSingleton().logMessage(LML_NORMAL, "ChangeDisplaySettings with user display frequency failed");
						displayDeviceMode.dmFields ^= DM_DISPLAYFREQUENCY;
					}
				}
				if (ChangeDisplaySettingsEx(mDeviceName, &displayDeviceMode, NULL, CDS_FULLSCREEN, NULL) != DISP_CHANGE_SUCCESSFUL)								
					LogManager::getSingleton().logMessage(LML_CRITICAL, "ChangeDisplaySettings failed");
*/

			}
			// Pass pointer to self as WM_CREATE parameter
			mWindow = CreateWindowEx(dwStyleEx, "OgreGLWindow", title.c_str(),
				dwStyle, mLeft, mTop, mWidth, mHeight, parent, 0, hInst, this);

			WindowEventUtilities::_addRenderWindow(this);

			LogManager::getSingleton().stream()
				<< "Created Win32Window '"
				<< mName << "' : " << mWidth << "x" << mHeight
				<< ", " << mColourDepth << "bpp";

		}

		RECT rc;
		// top and left represent outer window position
		GetWindowRect(mWindow, &rc);
		mTop = rc.top;
		mLeft = rc.left;
		// width and height represent drawable area only
		GetClientRect(mWindow, &rc);
		mWidth = rc.right;
		mHeight = rc.bottom;

		mNativeDisplay = GetDC(mWindow);
		mEglDisplay = eglGetDisplay(mNativeDisplay);
		mGLSupport->setGLDisplay(mEglDisplay);
		mEglSurface = createSurfaceFromWindow(mEglDisplay, mWindow);


	}

	void Win32EGLWindow::reposition( int left, int top )
	{

	}

	void Win32EGLWindow::resize( unsigned int width, unsigned int height )
	{

	}

	void Win32EGLWindow::windowMovedOrResized()
	{

	}

	void Win32EGLWindow::switchFullScreen( bool fullscreen )
	{

	}

    void Win32EGLWindow::create(const String& name, uint width, uint height,
                                bool fullScreen, const NameValuePairList *miscParams)
    {
        String title = name;
        uint samples = 0;
        int gamma;
        short frequency = 0;
        bool vsync = false;
        ::EGLContext eglContext = 0;
		int left = 0;
		int top  = 0;

		getLeftAndTopFromNativeWindow(left, top, width, height);

        mIsFullScreen = fullScreen;

        if (miscParams)
        {
            NameValuePairList::const_iterator opt;
            NameValuePairList::const_iterator end = miscParams->end();

            if ((opt = miscParams->find("currentGLContext")) != end &&
                StringConverter::parseBool(opt->second))
            {
                eglContext = eglGetCurrentContext();
                if (eglContext)
                {
                    OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR,
                                "currentGLContext was specified with no current GL context",
                                "EGLWindow::create");
                }

                eglContext = eglGetCurrentContext();
                mEglSurface = eglGetCurrentSurface(EGL_DRAW);
            }

            // Note: Some platforms support AA inside ordinary windows
            if ((opt = miscParams->find("FSAA")) != end)
            {
                samples = StringConverter::parseUnsignedInt(opt->second);
            }

            if ((opt = miscParams->find("displayFrequency")) != end)
            {
                frequency = (short)StringConverter::parseInt(opt->second);
            }

            if ((opt = miscParams->find("vsync")) != end)
            {
                vsync = StringConverter::parseBool(opt->second);
            }

            if ((opt = miscParams->find("gamma")) != end)
            {
                gamma = StringConverter::parseBool(opt->second);
            }

            if ((opt = miscParams->find("left")) != end)
            {
                left = StringConverter::parseInt(opt->second);
            }

            if ((opt = miscParams->find("top")) != end)
            {
                top = StringConverter::parseInt(opt->second);
            }

            if ((opt = miscParams->find("title")) != end)
            {
                title = opt->second;
            }

            if ((opt = miscParams->find("externalGLControl")) != end)
            {
                mIsExternalGLControl = StringConverter::parseBool(opt->second);
            }
		}

		initNativeCreatedWindow(miscParams);

        if (mEglSurface)
        {
            mEglConfig = mGLSupport->getGLConfigFromDrawable (mEglSurface, &width, &height);
        }

        if (!mEglConfig && eglContext)
        {
            mEglConfig = mGLSupport->getGLConfigFromContext(eglContext);

            if (!mEglConfig)
            {
                // This should never happen.
                OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR,
                            "Unexpected failure to determine a EGLFBConfig",
                            "EGLWindow::create");
            }
        }

        mIsExternal = (mEglSurface != 0);



        if (!mEglConfig)
        {
            int minAttribs[] = {
                EGL_LEVEL, 0,
                EGL_DEPTH_SIZE, 16,
                EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
                EGL_NONE
            };

            int maxAttribs[] = {
                EGL_SAMPLES, samples,
                EGL_STENCIL_SIZE, INT_MAX,
                EGL_NONE
            };

            mEglConfig = mGLSupport->selectGLConfig(minAttribs, maxAttribs);
            mHwGamma = false;
        }

        if (!mIsTopLevel)
        {
            mIsFullScreen = false;
            left = top = 0;
        }

        if (mIsFullScreen)
        {
            mGLSupport->switchMode (width, height, frequency);
        }

		if (!mIsExternal)
        {
			createNativeWindow(left, top, width, height, title);
		}

		mContext = createEGLContext();

        ::EGLSurface oldDrawableDraw = eglGetCurrentSurface(EGL_DRAW);
        ::EGLSurface oldDrawableRead = eglGetCurrentSurface(EGL_READ);
        ::EGLContext oldContext  = eglGetCurrentContext();

        int glConfigID;

        mGLSupport->getGLConfigAttrib(mEglConfig, EGL_CONFIG_ID, &glConfigID);
        LogManager::getSingleton().logMessage("EGLWindow::create used FBConfigID = " + StringConverter::toString(glConfigID));

        mName = name;
        mWidth = width;
        mHeight = height;
        mLeft = left;
        mTop = top;
        mActive = true;
		mVisible = true;

        mClosed = false;
	}

}