#include "stdafx.h"
#include "resource.h"
#include "Version.h"

#pragma comment(lib, "Comctl32.lib")

int hLangpack = 0;

int SSC_OptInitialise(WPARAM wp, LPARAM lp);

PLUGININFOEX g_pluginInfo =
{
	sizeof(PLUGININFOEX),
	__PLUGIN_NAME,
	PLUGIN_MAKE_VERSION(__MAJOR_VERSION, __MINOR_VERSION, __RELEASE_NUM, __BUILD_NUM),
	__DESCRIPTION,
	__AUTHOR,
	__AUTHOREMAIL,
	__COPYRIGHT,
	__AUTHORWEB,
	UNICODE_AWARE,		//not transient
	{ 0x2925520b, 0x6677, 0x4658, { 0x8b, 0xad, 0x56, 0x61, 0xd1, 0x3e, 0x46, 0x92 } }
};

HINSTANCE g_hModule = NULL;

UINT   g_MsgIDSkypeControlAPIAttach = 0;
UINT   g_MsgIDSkypeControlAPIDiscover = 0;
HWND   g_wndMainWindow = NULL;

HANDLE g_hThread = NULL;
HANDLE g_hEventShutdown = NULL;

bool   g_bMirandaIsShutdown = false;

enum
{
	SKYPECONTROLAPI_ATTACH_SUCCESS = 0,								// Client is successfully attached and API window handle can be found in wParam parameter
	SKYPECONTROLAPI_ATTACH_PENDING_AUTHORIZATION = 1,	// Skype has acknowledged connection request and is waiting for confirmation from the user.
	// The client is not yet attached and should wait for SKYPECONTROLAPI_ATTACH_SUCCESS message
	SKYPECONTROLAPI_ATTACH_REFUSED = 2,								// User has explicitly denied access to client
	SKYPECONTROLAPI_ATTACH_NOT_AVAILABLE = 3,					// API is not available at the moment. For example, this happens when no user is currently logged in.
	// Client should wait for SKYPECONTROLAPI_ATTACH_API_AVAILABLE broadcast before making any further
	// connection attempts.
	SKYPECONTROLAPI_ATTACH_API_AVAILABLE = 0x8001
};

LPCTSTR g_pszSkypeWndClassName = _T("SkypeHelperWindow{155198f0-8749-47b7-ac53-58f2ac70844c}");

const CMirandaStatus2SkypeStatus g_aStatusCode[10] = 
{
	{ID_STATUS_AWAY, "AWAY",_T("Away")},
	{ID_STATUS_NA, "AWAY",_T("NA")}, // removed in Skype 5
	{ID_STATUS_DND, "DND",_T("DND")},
	{ID_STATUS_ONLINE, "ONLINE",_T("Online")},
	{ID_STATUS_FREECHAT, "ONLINE",_T("Free for chat")},	// SKYPEME status doesn't work in Skype 4!
	{ID_STATUS_OFFLINE, "OFFLINE",_T("Offline")},
	{ID_STATUS_INVISIBLE, "INVISIBLE",_T("Invisible")},
	{ID_STATUS_OCCUPIED,"DND",_T("Occupied")},
	{ID_STATUS_ONTHEPHONE,"DND",_T("On the phone")},
	{ID_STATUS_OUTTOLUNCH,"DND",_T("Out to lunch")}
};

enum{INVALID_INDEX = 0xFFFFFFFF};
	
class CStatusInfo
{
public:
	CStatusInfo() : m_nStatusIndex(INVALID_INDEX){m_szModule[0] = '\0';}

	size_t StatusIndex()const{return m_nStatusIndex;}
	void StatusIndex(size_t val){m_nStatusIndex = val;}

	const char* Module()const{return m_szModule;}
	void Module(const char* val)
	{
		if (val)
			strncpy_s(m_szModule,val,strlen(val));
		else
			m_szModule[0] = '\0';
	}

private:
	char m_szModule[MAXMODULELABELLENGTH];
	size_t m_nStatusIndex;
};

COptions         g_Options;
CStatusInfo      g_CurrStatusInfo;
CRITICAL_SECTION g_csStatusInfo;

int SSC_OnProtocolAck(WPARAM, LPARAM lParam)
{
	if (g_bMirandaIsShutdown)
		return 0;

	ACKDATA* pAckData = reinterpret_cast<ACKDATA*>(lParam);
	if (pAckData->type != ACKTYPE_STATUS || pAckData->result != ACKRESULT_SUCCESS || !pAckData->szModule)
		return 0;

	if (!g_Options.IsProtocolExcluded(pAckData->szModule)) {
		int nStatus = CallProtoService(pAckData->szModule,PS_GETSTATUS,0,0);
		for(size_t i = 0; i < SIZEOF(g_aStatusCode); ++i) {
			const CMirandaStatus2SkypeStatus& ms = g_aStatusCode[i];
			if (ms.m_nMirandaStatus == nStatus) {
				int nPrevStatus;
				if ((false == g_Options.IsProtocolStatusExcluded(pAckData->szModule,nStatus))
					&& ((false == g_Options.GetSyncStatusStateFlag()) 
						|| (false == g_Options.GetPreviousStatus(pAckData->szModule,nPrevStatus)) 
						|| (nPrevStatus != nStatus)))
				{
					{
						mir_cslock guard(g_csStatusInfo);
						g_CurrStatusInfo.StatusIndex(i);
						g_CurrStatusInfo.Module(pAckData->szModule);
					}
					if (0 == ::PostMessage(HWND_BROADCAST,g_MsgIDSkypeControlAPIDiscover,(WPARAM)g_wndMainWindow,0)) {
						mir_cslock guard(g_csStatusInfo);
						g_CurrStatusInfo.StatusIndex(INVALID_INDEX);
						g_CurrStatusInfo.Module(NULL);
					}
					else g_Options.SetPreviousStatus(pAckData->szModule,nStatus);
				}
				break;
			}
		}
	}

	return 0;
}

static void ThreadFunc(void*) 
{ 
	while (true) {
		MSG msg;
		if (TRUE == ::PeekMessage(&msg,g_wndMainWindow,0,0,PM_NOREMOVE)) {
			while(::GetMessage(&msg,g_wndMainWindow,0,0)) { 
				TranslateMessage(&msg); 
				DispatchMessage(&msg); 
			} 
		}
		else {
			DWORD dwResult = ::MsgWaitForMultipleObjects(1,&g_hEventShutdown,FALSE,INFINITE,QS_ALLEVENTS);
			_ASSERT(WAIT_FAILED != dwResult);
			if (WAIT_OBJECT_0 == dwResult)
				break;
		}
	}
}   

bool ProtoServiceExists(const char *szModule,const char *szService)
{
	char str[MAXMODULELABELLENGTH * 2];
	strncpy_s(str,szModule,strlen(szModule));
	strncat_s(str,szService,strlen(szService));

	return (ServiceExists(str) > 0);
}


LRESULT APIENTRY SkypeAPI_WindowProc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp)
{
	LRESULT lReturnCode = 0;
	bool bIssueDefProc = false;

	switch(msg) {
	case WM_DESTROY:
		g_wndMainWindow = NULL;
		break;

	case WM_COPYDATA:
		break;

	default:
		if (msg == g_MsgIDSkypeControlAPIAttach) {
			switch(lp) {
			case SKYPECONTROLAPI_ATTACH_SUCCESS:
				{
					CStatusInfo si;
					{
						mir_cslock guard(g_csStatusInfo);
						si = g_CurrStatusInfo;
					}
					if (INVALID_INDEX != si.StatusIndex() && si.StatusIndex() < SIZEOF(g_aStatusCode)) {
						const CMirandaStatus2SkypeStatus& ms = g_aStatusCode[si.StatusIndex()];
						HWND wndSkypeAPIWindow = reinterpret_cast<HWND>(wp);

						enum{BUFFER_SIZE = 256};
						char szSkypeCmd[BUFFER_SIZE];
						const char szSkypeCmdSetStatus[] = "SET USERSTATUS ";
						::strncpy_s(szSkypeCmd,szSkypeCmdSetStatus,sizeof(szSkypeCmdSetStatus)/sizeof(szSkypeCmdSetStatus[0]));
						::strncat_s(szSkypeCmd,ms.m_pszSkypeStatus,strlen(ms.m_pszSkypeStatus));
						DWORD cLength = static_cast<DWORD>(strlen(szSkypeCmd));

						COPYDATASTRUCT oCopyData;
						oCopyData.dwData=0;
						oCopyData.lpData = szSkypeCmd;
						oCopyData.cbData = cLength+1;
						SendMessage(wndSkypeAPIWindow,WM_COPYDATA,(WPARAM)hWnd,(LPARAM)&oCopyData);
						if (g_Options.GetSyncStatusMsgFlag()) {
							TCHAR* pszStatusMsg = NULL;
							if (true == ProtoServiceExists(si.Module(), PS_GETMYAWAYMSG)) 
								pszStatusMsg = reinterpret_cast<TCHAR*>(CallProtoService(si.Module(),PS_GETMYAWAYMSG,(WPARAM)ms.m_nMirandaStatus,SGMA_TCHAR));

							if ((NULL == pszStatusMsg) || (CALLSERVICE_NOTFOUND == reinterpret_cast<int>(pszStatusMsg)))
								pszStatusMsg = reinterpret_cast<TCHAR*>(CallService(MS_AWAYMSG_GETSTATUSMSGT,(WPARAM)ms.m_nMirandaStatus,0));

							if (pszStatusMsg && reinterpret_cast<int>(pszStatusMsg) != CALLSERVICE_NOTFOUND) {
								char* pMsg = mir_utf8encodeT(pszStatusMsg);
								mir_free(pszStatusMsg);

								const char szSkypeCmdSetStatusMsg[] = "SET PROFILE MOOD_TEXT ";
								::strncpy_s(szSkypeCmd,szSkypeCmdSetStatusMsg,sizeof(szSkypeCmdSetStatusMsg)/sizeof(szSkypeCmdSetStatusMsg[0]));
								::strncat_s(szSkypeCmd,pMsg,strlen(pMsg));										
								mir_free(pMsg);
										
								DWORD cLength = static_cast<DWORD>(strlen(szSkypeCmd));

								oCopyData.dwData=0;
								oCopyData.lpData = szSkypeCmd;
								oCopyData.cbData = cLength+1;
								SendMessage(wndSkypeAPIWindow,WM_COPYDATA,(WPARAM)hWnd,(LPARAM)&oCopyData);
							}
						}
					}
				}
				break;

			case SKYPECONTROLAPI_ATTACH_PENDING_AUTHORIZATION:
				break;

			case SKYPECONTROLAPI_ATTACH_REFUSED:
				break;

			case SKYPECONTROLAPI_ATTACH_NOT_AVAILABLE:
				break;

			case SKYPECONTROLAPI_ATTACH_API_AVAILABLE:
				break;
			}
			lReturnCode=1;
		}
		else bIssueDefProc = true;
		break;
	}
		
	if (true == bIssueDefProc)
		lReturnCode = DefWindowProc(hWnd, msg, wp, lp);

	return lReturnCode;
}

int SSC_OnPreShutdown(WPARAM/* wParam*/, LPARAM/* lParam*/)
{
	g_bMirandaIsShutdown = true;
	BOOL b = SetEvent(g_hEventShutdown);
	_ASSERT(b && "SetEvent failed");

	DWORD dwResult = ::WaitForSingleObject(g_hThread,INFINITE);
	_ASSERT(WAIT_FAILED != dwResult);

	b = ::CloseHandle(g_hEventShutdown);
	_ASSERT(b && "CloseHandle event");

	if (g_wndMainWindow) {
		b = DestroyWindow(g_wndMainWindow);
		_ASSERT(b && "DestoryWindow");
		g_wndMainWindow = NULL;
	}

	UnregisterClass(g_pszSkypeWndClassName,g_hModule);
	return 0;
}

/******************************* INSTALLATION PROCEDURES *****************************/

BOOL WINAPI DllMain(HINSTANCE hinstDLL,DWORD fdwReason,LPVOID lpvReserved)
{
	if (fdwReason == DLL_PROCESS_ATTACH)
		g_hModule = hinstDLL;

	return TRUE;
}

extern "C" __declspec(dllexport) PLUGININFOEX* MirandaPluginInfoEx(DWORD mirandaVersion)
{
	return &g_pluginInfo;
}

extern "C" int __declspec(dllexport) Load()
{
	mir_getLP(&g_pluginInfo);
	InitializeCriticalSection(&g_csStatusInfo);

	g_MsgIDSkypeControlAPIAttach = ::RegisterWindowMessage(_T("SkypeControlAPIAttach"));
	g_MsgIDSkypeControlAPIDiscover = ::RegisterWindowMessage(_T("SkypeControlAPIDiscover"));
	if ((0 == g_MsgIDSkypeControlAPIAttach)|| (0 == g_MsgIDSkypeControlAPIDiscover))
		return 1;

	WNDCLASS oWindowClass = { 0 };
	oWindowClass.style = CS_HREDRAW|CS_VREDRAW|CS_DBLCLKS;
	oWindowClass.lpfnWndProc = (WNDPROC)&SkypeAPI_WindowProc;
	oWindowClass.hInstance = g_hModule;
	oWindowClass.lpszClassName = g_pszSkypeWndClassName;
	if (!RegisterClass(&oWindowClass))
		return 1;

	g_wndMainWindow = CreateWindowEx( WS_EX_APPWINDOW|WS_EX_WINDOWEDGE,
		g_pszSkypeWndClassName,_T(""), WS_BORDER|WS_SYSMENU|WS_MINIMIZEBOX,
		CW_USEDEFAULT, CW_USEDEFAULT, 128, 128, NULL, 0, g_hModule, 0);
	if (g_wndMainWindow == NULL)
		return 1;
		
	g_bMirandaIsShutdown = false;
	g_hEventShutdown = ::CreateEvent(NULL,TRUE,FALSE,NULL);

	g_hThread = mir_forkthread(ThreadFunc, NULL);

	HookEvent(ME_PROTO_ACK,SSC_OnProtocolAck);
	HookEvent(ME_SYSTEM_PRESHUTDOWN,SSC_OnPreShutdown);
	HookEvent(ME_OPT_INITIALISE,SSC_OptInitialise);
	return 0;
}

extern "C" __declspec(dllexport) int Unload(void)		// Executed on DLL unload
{
	DeleteCriticalSection(&g_csStatusInfo);
	return 0;
}