#include <windows.h>
#include <zenisynth.h>
#include <sstream>
extern "C"
{
	#include "lua.h"
	#include "lauxlib.h"
	#include "lualib.h"
}
#pragma comment(lib,"lua5.1.lib")
#include <imm.h>
#pragma comment(lib,"imm32.lib")

const int IMC_SETOPENSTATUS=0x0006;
const int IMC_GETOPENSTATUS=0x0005;
const int IMC_GETSENTENCEMODE=0x0001;
const int IMC_GETCONVERSIONMODE=0x0002;


void _addLog(std::wstring&){}
ZSLogFunction addLog=&_addLog;
#define out(expr) {\
	std::wstringstream str;\
	str<<__FILE__<<" : "<<__LINE__<<" > "<<expr<<"\r\n";\
	addLog(str.str());\
	}



#pragma data_seg("ZS_DATA")
HHOOK g_hook=NULL;
HHOOK g_msgHook=NULL;
bool g_isConverting=false;
HINSTANCE g_hModule=NULL;
#pragma data_seg()

const HWND getZeniSynthHWND()
{
	return FindWindowA("#32770","ZeniSynth");;
}

LRESULT CALLBACK hookMsgProc(
  int code,       // フックコード
  WPARAM wParam,  // 削除オプション
  LPARAM lParam   // メッセージ
)
{

		MSG *msg=(MSG*)lParam;
		switch(msg->message)
	{
		case		WM_IME_STARTCOMPOSITION:
			if(g_isConverting==false)
			{
				SendMessage(getZeniSynthHWND(),WM_IME_STARTCOMPOSITION,wParam,lParam);
			}
			g_isConverting=true;
			break;
		case		WM_IME_ENDCOMPOSITION:
			if(g_isConverting==true)
			{
				SendMessage(getZeniSynthHWND(),WM_IME_ENDCOMPOSITION,wParam,lParam);
			}
			g_isConverting=false;
			break;
	}

	return CallNextHookEx(g_msgHook,code,wParam,lParam);
}

LRESULT CALLBACK hookWndProc(
  int code,       // フックコード
  WPARAM wParam,  // 削除オプション
  LPARAM lParam   // メッセージ
)
{

	CWPSTRUCT* pStruct=(CWPSTRUCT*)lParam;
//		MSG *msg=(MSG*)lParam;
	switch(pStruct->message)
	{
		case		WM_IME_STARTCOMPOSITION:
			if(g_isConverting==false)
			{
				SendMessage(getZeniSynthHWND(),WM_IME_STARTCOMPOSITION,wParam,lParam);
			}
			g_isConverting=true;
			break;
		case		WM_IME_ENDCOMPOSITION:
			if(g_isConverting==true)
			{
				SendMessage(getZeniSynthHWND(),WM_IME_ENDCOMPOSITION,wParam,lParam);
			}
			g_isConverting=false;
			break;
	}

	return CallNextHookEx(g_hook,code,wParam,lParam);
}

ZSExport OnLoad(ZSLogFunction newAddLog)
{
	addLog=newAddLog;	//assign log function

	if(g_hook==NULL)
	{
		g_hook=SetWindowsHookEx(WH_CALLWNDPROC,hookWndProc,g_hModule,0);
	}
	if(g_msgHook==NULL)
	{
		g_msgHook=SetWindowsHookEx(WH_GETMESSAGE,&hookMsgProc,g_hModule,0);
	}
	return TRUE;
}

ZSExport OnFree()
{
	if(g_hook!=NULL)
	{
		UnhookWindowsHookEx(g_hook);
		g_hook=NULL;
	}
	if(g_msgHook!=NULL)
	{
		UnhookWindowsHookEx(g_msgHook);
		g_msgHook=NULL;
	}
	return TRUE;
}

BOOL APIENTRY DllMain( HINSTANCE hInstance,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
					 )
{
  switch (ul_reason_for_call)
  {
    case DLL_PROCESS_ATTACH:
		if(g_hModule==NULL){	    g_hModule=hInstance;	}
		break;
	case DLL_PROCESS_DETACH:
		break;
//		unHook();
  }
    return TRUE;
}
ZSExport forceKillActiveApp(lua_State* L)
{
	DWORD	PID;
	GetWindowThreadProcessId(GetForegroundWindow(),&PID);
	HANDLE	hProcess = OpenProcess(PROCESS_TERMINATE, false, PID);
	if(hProcess!=NULL)
	{
		TerminateProcess(hProcess , 0 );
		CloseHandle(hProcess);
	}
	return 0;
}

struct AutoAttach
{
	AutoAttach(HWND hWnd)
		:hThread(GetWindowThreadProcessId(hWnd,NULL))
	{
		AttachThreadInput(GetCurrentThreadId(),hThread,true);
	}
	~AutoAttach()
	{
			AttachThreadInput(GetCurrentThreadId(),hThread,false);
	}
	DWORD hThread;
};

const HWND getFocusWindow()
{
	AutoAttach at(GetForegroundWindow());
	return GetFocus();
}
ZSExport setIMEStatus(lua_State* L)
{
	CheckArg(1)
	{
		::SendMessage(getFocusWindow(), WM_IME_CONTROL, IMC_SETOPENSTATUS , lua_toboolean(L,1));
		::SendMessage(GetForegroundWindow(), WM_IME_CONTROL, IMC_SETOPENSTATUS , lua_toboolean(L,1));
		::SendMessage(ImmGetDefaultIMEWnd(getFocusWindow()), WM_IME_CONTROL, IMC_SETOPENSTATUS , lua_toboolean(L,1));
		::SendMessage(ImmGetDefaultIMEWnd(GetForegroundWindow()), WM_IME_CONTROL, IMC_SETOPENSTATUS , lua_toboolean(L,1));

	}
	return 0;
}

ZSExport getIMEStatus(lua_State* L)
{
	bool ime=false;

	const HWND hWnd=getFocusWindow();
	const HWND hIMEWnd=ImmGetDefaultIMEWnd(hWnd);
	ime=static_cast<bool>(::SendMessage(hIMEWnd, WM_IME_CONTROL, IMC_GETOPENSTATUS , NULL));

	lua_pushboolean(L,ime);

	return 1;
}

ZSExport getActiveWindowName(lua_State* L)
{
	char pStr[256];
	GetWindowTextA(GetForegroundWindow(),pStr,255);

	lua_pushstring(L,pStr);
	return 1;
}

ZSExport getActiveWindowTopName(lua_State* L)
{
	HWND	hCurrent=GetForegroundWindow();
	for(;;){
		const	HWND	hParent=GetParent(hCurrent);
		if(hParent==NULL){break;}
		if(hParent==hCurrent){break;}
		hCurrent=hParent;
	}
	char pStr[256];
	GetWindowTextA(hCurrent,pStr,255);

	lua_pushstring(L,pStr);
	return 1;
}

ZSExport getActiveWindowClassName(lua_State *L)
{
	char pStr[256];
	GetClassNameA(GetForegroundWindow(),pStr,255);

	lua_pushstring(L,pStr);
	return 1;
}
/*
const int WM_IS_IME_CONVERTING = WM_APP+0x1ec;

ZSExport isIMEConverting(lua_State* L)
{
	bool isConv=false;
	SendMessage(GetForegroundWindow(),WM_IS_IME_CONVERTING,(WPARAM)&isConv,(LPARAM)&isConv);
	lua_pushboolean(L,isConv);
	return 1;
}
*/