// Copyright (C) 2003 Dolphin Project.

// This program 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, version 2.0.

// This program 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 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/

#include <tchar.h>
#include <windows.h>
#include <d3dx9.h>

#include "Common.h"
#include "Atomic.h"
#include "Thread.h"
#include "LogManager.h"
#include "debugger/debugger.h"

#if defined(HAVE_WX) && HAVE_WX
#include "Debugger/Debugger.h"
GFXDebuggerDX9 *m_DebuggerFrame = NULL;
#endif // HAVE_WX

#include "svnrev.h"
#include "resource.h"
#include "main.h"
#include "VideoConfig.h"
#include "Fifo.h"
#include "OpcodeDecoding.h"
#include "TextureCache.h"
#include "BPStructs.h"
#include "VertexManager.h"
#include "VertexLoaderManager.h"
#include "VertexShaderManager.h"
#include "PixelShaderManager.h"
#include "VertexShaderCache.h"
#include "PixelShaderCache.h"
#include "CommandProcessor.h"
#include "PixelEngine.h"
#include "OnScreenDisplay.h"
#include "DlgSettings.h"
#include "D3DTexture.h"
#include "D3DUtil.h"
#include "W32Util/Misc.h"
#include "EmuWindow.h"
#include "VideoState.h"
#include "XFBConvert.h"
#include "render.h"


// Having to include this is TERRIBLY ugly. FIXME x100
#include "../../../Core/Core/Src/ConfigManager.h" // FIXME

#include "Utils.h"

HINSTANCE g_hInstance = NULL;
SVideoInitialize g_VideoInitialize;
PLUGIN_GLOBALS* globals = NULL;
bool s_initialized;

static u32 s_efbAccessRequested = FALSE;
static volatile u32 s_FifoShuttingDown = FALSE;
static bool s_swapRequested = false;

static volatile struct
{
	u32 xfbAddr;
	FieldType field;
	u32 fbWidth;
	u32 fbHeight;
} s_beginFieldArgs;

static volatile EFBAccessType s_AccessEFBType;

bool HandleDisplayList(u32 address, u32 size)
{
	return false;
}

bool IsD3D()
{
	return true;
}

// This is used for the functions right below here which use wxwidgets
#if defined(HAVE_WX) && HAVE_WX
#ifdef _WIN32
	WXDLLIMPEXP_BASE void wxSetInstance(HINSTANCE hInst);
#endif

wxWindow* GetParentedWxWindow(HWND Parent)
{
#ifdef _WIN32
	wxSetInstance((HINSTANCE)g_hInstance);
#endif
	wxWindow *win = new wxWindow();
#ifdef _WIN32
	win->SetHWND((WXHWND)Parent);
	win->AdoptAttributesFromHWND();
#endif
	return win;
}
#endif

#if defined(HAVE_WX) && HAVE_WX
void DllDebugger(HWND _hParent, bool Show)
{
	if (!m_DebuggerFrame)
		m_DebuggerFrame = new GFXDebuggerDX9(GetParentedWxWindow(_hParent));

	if (Show)
		m_DebuggerFrame->Show();
	else
		m_DebuggerFrame->Hide();
}
#else
void DllDebugger(HWND _hParent, bool Show) { }
#endif

#if defined(HAVE_WX) && HAVE_WX
	class wxDLLApp : public wxApp
	{
		bool OnInit()
		{
			return true;
		}
	};
	IMPLEMENT_APP_NO_MAIN(wxDLLApp) 
	WXDLLIMPEXP_BASE void wxSetInstance(HINSTANCE hInst);
#endif

BOOL APIENTRY DllMain(HINSTANCE hinstDLL, DWORD dwReason, LPVOID lpvReserved)
{
	switch (dwReason)
	{
	case DLL_PROCESS_ATTACH:
		{
			#if defined(HAVE_WX) && HAVE_WX
			// Use wxInitialize() if you don't want GUI instead of the following 12 lines
			wxSetInstance((HINSTANCE)hinstDLL);
			int argc = 0;
			char **argv = NULL;
			wxEntryStart(argc, argv);
			if (!wxTheApp || !wxTheApp->CallOnInit())
				return FALSE;
			#endif
		}
		break;
	case DLL_PROCESS_DETACH:
		#if defined(HAVE_WX) && HAVE_WX
			// This causes a "stop hang", if the gfx config dialog has been opened.
			// Old comment: "Use wxUninitialize() if you don't want GUI"
			wxEntryCleanup();
		#endif
		break;
	default:
		break;
	}

	g_hInstance = hinstDLL;
	return TRUE;
}

unsigned int Callback_PeekMessages()
{
	//TODO: peek message
	MSG msg;
	while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
	{
		if (msg.message == WM_QUIT)
			return FALSE;
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return TRUE;
}


void UpdateFPSDisplay(const char *text)
{
	char temp[512];
	sprintf_s(temp, 512, "SVN R%i: DX9: %s", SVN_REV, text);
    SetWindowTextA(EmuWindow::GetWnd(), temp);
}

void GetDllInfo (PLUGIN_INFO* _PluginInfo)
{
	_PluginInfo->Version = 0x0100;
	_PluginInfo->Type = PLUGIN_TYPE_VIDEO;
#ifdef DEBUGFAST
	sprintf_s(_PluginInfo->Name, 100, "Dolphin Direct3D9 (DebugFast)");
#else
#ifndef _DEBUG
	sprintf_s(_PluginInfo->Name, 100, "Dolphin Direct3D9");
#else
	sprintf_s(_PluginInfo->Name, 100, "Dolphin Direct3D9 (Debug)");
#endif
#endif
}

void SetDllGlobals(PLUGIN_GLOBALS* _pPluginGlobals) {
	globals = _pPluginGlobals;
	LogManager::SetInstance((LogManager *)globals->logManager);
}

void DllAbout(HWND _hParent)
{
	DialogBoxA(g_hInstance,(LPCSTR)IDD_ABOUT,_hParent,(DLGPROC)AboutProc);
}

void DllConfig(HWND _hParent)
{
	// If not initialized, only init D3D so we can enumerate resolutions.
	if (!s_initialized) D3D::Init();
	DlgSettings_Show(g_hInstance, _hParent);
	if (!s_initialized)	D3D::Shutdown();
}

void Initialize(void *init)
{
	frameCount = 0;
	SVideoInitialize *_pVideoInitialize = (SVideoInitialize*)init;
	g_VideoInitialize = *_pVideoInitialize;
	InitXFBConvTables();

	g_Config.Load(FULL_CONFIG_DIR "gfx_dx9.ini");
	g_Config.GameIniLoad(globals->game_ini);
	UpdateProjectionHack(g_Config.iPhackvalue);	// DX9 projection hack could be disabled by commenting out this line
	UpdateActiveConfig();
	
	g_VideoInitialize.pWindowHandle = (void*)EmuWindow::Create((HWND)g_VideoInitialize.pWindowHandle, g_hInstance, _T("Loading - Please wait."));
	if (g_VideoInitialize.pWindowHandle == NULL)
	{
		ERROR_LOG(VIDEO, "An error has occurred while trying to create the window.");
		return;
	}
	else if (FAILED(D3D::Init()))
	{
		MessageBox(GetActiveWindow(), _T("Unable to initialize Direct3D. Please make sure that you have the latest version of DirectX 9.0c correctly installed."), _T("Fatal Error"), MB_OK);
		return;
	}

	g_VideoInitialize.pPeekMessages = &Callback_PeekMessages;
	g_VideoInitialize.pUpdateFPSDisplay = &UpdateFPSDisplay;

    _pVideoInitialize->pPeekMessages = g_VideoInitialize.pPeekMessages;
    _pVideoInitialize->pUpdateFPSDisplay = g_VideoInitialize.pUpdateFPSDisplay;
    _pVideoInitialize->pWindowHandle = g_VideoInitialize.pWindowHandle;

	OSD::AddMessage("Dolphin Direct3D9 Video Plugin.", 5000);
	s_initialized = true;
}

void Video_Prepare()
{
	// Better be safe...
	s_efbAccessRequested = FALSE;
	s_FifoShuttingDown = FALSE;

	Renderer::Init();
	TextureCache::Init();
	BPInit();
	VertexManager::Init();
	Fifo_Init();
	VertexLoaderManager::Init();
	OpcodeDecoder_Init();
	VertexShaderCache::Init();
	VertexShaderManager::Init();
	PixelShaderCache::Init();
	PixelShaderManager::Init();
    CommandProcessor::Init();
    PixelEngine::Init();
}

void Shutdown()
{
	s_efbAccessRequested = FALSE;
	s_FifoShuttingDown = FALSE;

	Fifo_Shutdown();
	VertexManager::Shutdown();
	VertexLoaderManager::Shutdown();
	VertexShaderCache::Shutdown();
	VertexShaderManager::Shutdown();
	PixelShaderCache::Shutdown();
	PixelShaderManager::Shutdown();
	TextureCache::Shutdown();
	OpcodeDecoder_Shutdown();
	Renderer::Shutdown();
	D3D::Shutdown();
	EmuWindow::Close();
	s_initialized = false;
}

void DoState(unsigned char **ptr, int mode) {
	// Clear texture cache because it might have written to RAM
	TextureCache::Invalidate(false);
	// No need to clear shader caches.
	PointerWrap p(ptr, mode);
	VideoCommon_DoState(p);
}

void EmuStateChange(PLUGIN_EMUSTATE newState)
{
	Fifo_RunLoop((newState == PLUGIN_EMUSTATE_PLAY) ? true : false);
}

void Video_EnterLoop()
{
	Fifo_EnterLoop(g_VideoInitialize);
}

void Video_ExitLoop()
{
	Fifo_ExitLoop();

	s_FifoShuttingDown = TRUE;
}

void Video_SetRendering(bool bEnabled) {
	Fifo_SetRendering(bEnabled);
}

// Run from the graphics thread
void VideoFifo_CheckSwapRequest()
{
	// swap unimplemented
	return;

	if (s_swapRequested)
	{
		// Flip the backbuffer to front buffer now
		s_swapRequested = false;
		//if (s_beginFieldArgs.field == FIELD_PROGRESSIVE || s_beginFieldArgs.field == FIELD_LOWER)
		{
			Renderer::Swap(0,FIELD_PROGRESSIVE,0,0);	// The swap function is not finished
														// so it is ok to pass dummy parameters for now
		}
	}
}

// Run from the graphics thread
void VideoFifo_CheckSwapRequestAt(u32 xfbAddr, u32 fbWidth, u32 fbHeight)
{
	// swap unimplemented
}

// Run from the CPU thread (from VideoInterface.cpp)
void Video_BeginField(u32 xfbAddr, FieldType field, u32 fbWidth, u32 fbHeight)
{
	// swap unimplemented
	return;

	s_beginFieldArgs.xfbAddr = xfbAddr;
	s_beginFieldArgs.field = field;
	s_beginFieldArgs.fbWidth = fbWidth;
	s_beginFieldArgs.fbHeight = fbHeight;
	s_swapRequested = true;

	if (s_initialized)
	{
		// Make sure previous swap request has made it to the screen
		if (g_VideoInitialize.bOnThread)
		{
			//while (Common::AtomicLoadAcquire(s_swapRequested))
				//Common::YieldCPU();
		}
		else
			VideoFifo_CheckSwapRequest();

	}
	DEBUGGER_LOG_AT(NEXT_XFB_CMD,{printf("Begin Field: %08x, %d x %d\n",xfbAddr,fbWidth,fbHeight);});
}

void Video_EndField()
{
}

void Video_AddMessage(const char* pstr, u32 milliseconds)
{
	OSD::AddMessage(pstr,milliseconds);
}

HRESULT ScreenShot(const char *File)
{
	Renderer::SetScreenshot(File);
	return S_OK;
}

void Video_Screenshot(const char *_szFilename)
{
	if (ScreenShot(_szFilename) != S_OK)
		PanicAlert("Error while capturing screen");
	else {
		std::string message =  "Saved ";
		message += _szFilename;
		OSD::AddMessage(message.c_str(), 2000);
	}
}

static struct
{
	EFBAccessType type;
	u32 x;
	u32 y;
} s_accessEFBArgs;

static u32 s_AccessEFBResult = 0;

void VideoFifo_CheckEFBAccess()
{
	if (Common::AtomicLoadAcquire(s_efbAccessRequested))
	{
		s_AccessEFBResult = Renderer::AccessEFB(s_accessEFBArgs.type, s_accessEFBArgs.x, s_accessEFBArgs.y);

		Common::AtomicStoreRelease(s_efbAccessRequested, FALSE);
	}
}

u32 Video_AccessEFB(EFBAccessType type, u32 x, u32 y)
{
	if (!g_ActiveConfig.bEFBAccessEnable)
		return 0;

	s_accessEFBArgs.type = type;
	s_accessEFBArgs.x = x;
	s_accessEFBArgs.y = y;

	Common::AtomicStoreRelease(s_efbAccessRequested, TRUE);

	if (g_VideoInitialize.bOnThread)
	{
		while (Common::AtomicLoadAcquire(s_efbAccessRequested) && !s_FifoShuttingDown)
			Common::YieldCPU();
	}
	else
		VideoFifo_CheckEFBAccess();

	return s_AccessEFBResult;
}


void Video_CommandProcessorRead16(u16& _rReturnValue, const u32 _Address)
{
    CommandProcessor::Read16(_rReturnValue, _Address);
}

void Video_CommandProcessorWrite16(const u16 _Data, const u32 _Address)
{
    CommandProcessor::Write16(_Data, _Address);
}

void Video_PixelEngineRead16(u16& _rReturnValue, const u32 _Address)
{
    PixelEngine::Read16(_rReturnValue, _Address);
}

void Video_PixelEngineWrite16(const u16 _Data, const u32 _Address)
{
    PixelEngine::Write16(_Data, _Address);
}

void Video_PixelEngineWrite32(const u32 _Data, const u32 _Address)
{
    PixelEngine::Write32(_Data, _Address);
}

inline void Video_GatherPipeBursted(void)
{
    CommandProcessor::GatherPipeBursted();
}

void Video_WaitForFrameFinish(void)
{
    CommandProcessor::WaitForFrameFinish();
}