/*
Copyright (C) 2006 Ricardo Pescuma Domenecci, Nightwish

This is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

This 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this file; see the file license.txt.  If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/

#include "commonheaders.h"

#ifdef _DEBUG

int _DebugTrace(const char *fmt, ...)
{
	char debug[2048];
	int ibsize = 2047;
	va_list va;
	va_start(va, fmt);

	mir_snprintf(debug, SIZEOF(debug) - 10, " ***** AVS [%08d] [ID:%04x]: ", GetTickCount(), GetCurrentThreadId());
	OutputDebugStringA(debug);
	mir_vsnprintf(debug, ibsize, fmt, va);
	OutputDebugStringA(debug);
	OutputDebugStringA(" ***** \n");

	return 0;
}

int _DebugTrace(MCONTACT hContact, const char *fmt, ...)
{
	char text[1024];
	size_t len;
	va_list va;

	char *name = NULL;
	char *proto = NULL;
	if (hContact != NULL)
	{
		name = (char*)CallService(MS_CLIST_GETCONTACTDISPLAYNAME, hContact, 0);
		proto = GetContactProto(hContact);
	}

	mir_snprintf(text, SIZEOF(text) - 10, " ***** AVS [%08d] [ID:%04x]: [%08d - %s - %s] ",
		GetTickCount(), GetCurrentThreadId(), hContact, proto == NULL ? "" : proto, name == NULL ? "" : name);
	len = strlen(text);

	va_start(va, fmt);
	mir_vsnprintf(&text[len], SIZEOF(text) - len, fmt, va);
	va_end(va);

	OutputDebugStringA(text);
	OutputDebugStringA(" ***** \n");

	return 0;
}

#endif

void mir_sleep(int time) 
{
	if (!g_shutDown)
		WaitForSingleObject(hShutdownEvent, time);
}

/*
 * path utilities (make avatar paths relative to *PROFILE* directory, not miranda directory.
 * taken and modified from core services
 */

int AVS_pathIsAbsolute(const TCHAR *path)
{
	if (!path || !(lstrlen(path) > 2))
		return 0;
	if ((path[1]==':'&&path[2]=='\\')||(path[0]=='\\'&&path[1]=='\\')) return 1;
	return 0;
}

size_t AVS_pathToRelative(const TCHAR *pSrc, TCHAR *pOut)
{
	if (!pSrc || !*pSrc || _tcslen(pSrc) > MAX_PATH) return 0;
	if (!AVS_pathIsAbsolute( pSrc ))
		lstrcpyn(pOut, pSrc, MAX_PATH);
	else {
		TCHAR szTmp[MAX_PATH];
		mir_sntprintf(szTmp, SIZEOF(szTmp), _T("%s"), pSrc);
		_tcslwr(szTmp);
		if (_tcsstr(szTmp, g_szDataPath))
			lstrcpyn(pOut, pSrc + _tcslen(g_szDataPath) + 1, MAX_PATH);
		else
			lstrcpyn(pOut, pSrc, MAX_PATH);
	}
	return _tcslen(pOut);
}

size_t AVS_pathToAbsolute(const TCHAR *pSrc, TCHAR *pOut)
{
	if (!pSrc || !lstrlen(pSrc) || lstrlen(pSrc) > MAX_PATH)
		return 0;

	if (AVS_pathIsAbsolute(pSrc) || !_istalnum(pSrc[0]))
		lstrcpyn(pOut, pSrc, MAX_PATH);
	else
		mir_sntprintf(pOut, MAX_PATH, _T("%s\\%s"), g_szDataPath, pSrc, MAX_PATH);
	return lstrlen(pOut);
}

/*
 * convert the avatar image path to a relative one...
 * given: contact handle, path to image
 */
void MakePathRelative(MCONTACT hContact, TCHAR *path)
{
	TCHAR szFinalPath[MAX_PATH];
	szFinalPath[0] = '\0';

	size_t result = AVS_pathToRelative(path, szFinalPath);
	if (result && szFinalPath[0] != '\0') {
		db_set_ts(hContact, "ContactPhoto", "RFile", szFinalPath);
		if (!db_get_b(hContact, "ContactPhoto", "Locked", 0))
			db_set_ts(hContact, "ContactPhoto", "Backup", szFinalPath);
	}
}

/*
 * convert the avatar image path to a relative one...
 * given: contact handle
 */

void MakePathRelative(MCONTACT hContact)
{
	DBVARIANT dbv;
	if ( !db_get_ts(hContact, "ContactPhoto", "File", &dbv)) {
		MakePathRelative(hContact, dbv.ptszVal);
		db_free(&dbv);
	}
}

// create the avatar in cache
// returns 0 if not created (no avatar), iIndex otherwise, -2 if has to request avatar, -3 if avatar too big
int CreateAvatarInCache(MCONTACT hContact, avatarCacheEntry *ace, char *szProto)
{
	DBVARIANT dbv = {0};
	char *szExt = NULL;
	TCHAR tszFilename[MAX_PATH];
	HANDLE hFile = INVALID_HANDLE_VALUE;
	DWORD dwFileSizeHigh = 0, dwFileSize = 0, sizeLimit = 0;

	tszFilename[0] = 0;

	ace->hbmPic = 0;
	ace->dwFlags = 0;
	ace->bmHeight = 0;
	ace->bmWidth = 0;
	ace->lpDIBSection = NULL;
	ace->szFilename[0] = 0;

	if (szProto == NULL) {
		char *proto = GetContactProto(hContact);
		if (proto == NULL || !db_get_b(NULL, AVS_MODULE, proto, 1))
			return -1;

		if (db_get_b(hContact, "ContactPhoto", "Locked", 0)
			&& !db_get_ts(hContact, "ContactPhoto", "Backup", &dbv)) {
				AVS_pathToAbsolute(dbv.ptszVal, tszFilename);
				db_free(&dbv);
		}
		else if ( !db_get_ts(hContact, "ContactPhoto", "RFile", &dbv)) {
			AVS_pathToAbsolute(dbv.ptszVal, tszFilename);
			db_free(&dbv);
		}
		else if ( !db_get_ts(hContact, "ContactPhoto", "File", &dbv)) {
			AVS_pathToAbsolute(dbv.ptszVal, tszFilename);
			db_free(&dbv);
		}
		else return -2;
	}
	else {
		if (hContact == 0) {				// create a protocol picture in the proto picture cache
			if ( !db_get_ts(NULL, PPICT_MODULE, szProto, &dbv)) {
				AVS_pathToAbsolute(dbv.ptszVal, tszFilename);
				db_free(&dbv);
			}
			else {
				if (lstrcmpA(szProto, AVS_DEFAULT)) {
					if ( !db_get_ts(NULL, PPICT_MODULE, AVS_DEFAULT, &dbv)) {
						AVS_pathToAbsolute(dbv.ptszVal, tszFilename);
						db_free(&dbv);
					}

					if (!strstr(szProto, "Global avatar for")) {
						PROTOACCOUNT* pdescr = (PROTOACCOUNT*)CallService(MS_PROTO_GETACCOUNT, 0, (LPARAM)szProto);
						if (pdescr == NULL)
							return -1;
						char key[MAX_PATH];
						mir_snprintf(key, SIZEOF(key), "Global avatar for %s accounts", pdescr->szProtoName);
						if ( !db_get_ts(NULL, PPICT_MODULE, key, &dbv)) {
							AVS_pathToAbsolute(dbv.ptszVal, tszFilename);
							db_free(&dbv);
						}
					}
				}
			}
		}
		else if (hContact == (MCONTACT)-1) {	// create own picture - note, own avatars are not on demand, they are loaded once at
			// startup and everytime they are changed.
			if (szProto[0] == '\0') {
				// Global avatar
				if ( db_get_ts(NULL, AVS_MODULE, "GlobalUserAvatarFile", &dbv))
					return -10;

				AVS_pathToAbsolute(dbv.ptszVal, tszFilename);
				db_free(&dbv);
			}
			else if ( ProtoServiceExists(szProto, PS_GETMYAVATART)) {
				if (CallProtoService(szProto, PS_GETMYAVATART, (WPARAM)tszFilename, (LPARAM)MAX_PATH))
					tszFilename[0] = '\0';
			}
			else if ( ProtoServiceExists(szProto, PS_GETMYAVATAR)) {
				char szFileName[ MAX_PATH ];
				if (CallProtoService(szProto, PS_GETMYAVATAR, (WPARAM)szFileName, (LPARAM)MAX_PATH))
					tszFilename[0] = '\0';
				else
					MultiByteToWideChar( CP_ACP, 0, szFileName, -1, tszFilename, SIZEOF(tszFilename));
			}
			else if ( !db_get_ts(NULL, szProto, "AvatarFile", &dbv)) {
				AVS_pathToAbsolute(dbv.ptszVal, tszFilename);
				db_free(&dbv);
			}
			else return -1;
		}
	}

	if ( lstrlen(tszFilename) < 4)
		return -1;

	_tcsncpy_s(tszFilename, VARST(tszFilename), _TRUNCATE);
	if ((hFile = CreateFile(tszFilename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)) == INVALID_HANDLE_VALUE)
		return -2;

	CloseHandle(hFile);
	WPARAM isTransparentImage = 0;

	ace->hbmPic = (HBITMAP) BmpFilterLoadBitmap32((WPARAM)&isTransparentImage, (LPARAM)tszFilename);
	ace->dwFlags = 0;
	ace->bmHeight = 0;
	ace->bmWidth = 0;
	ace->lpDIBSection = NULL;
	_tcsncpy(ace->szFilename, tszFilename, MAX_PATH);
	ace->szFilename[MAX_PATH - 1] = 0;
	if (ace->hbmPic != 0) {
		BITMAP bminfo;

		GetObject(ace->hbmPic, sizeof(bminfo), &bminfo);

		ace->cbSize = sizeof(avatarCacheEntry);
		ace->dwFlags = AVS_BITMAP_VALID;
		if (hContact != NULL && db_get_b(hContact, "ContactPhoto", "Hidden", 0))
			ace->dwFlags |= AVS_HIDEONCLIST;
		ace->hContact = hContact;
		ace->bmHeight = bminfo.bmHeight;
		ace->bmWidth = bminfo.bmWidth;

		BOOL noTransparency = db_get_b(0, AVS_MODULE, "RemoveAllTransparency", 0);

		// Calc image hash
		if (hContact != 0 && hContact != (MCONTACT)-1) {
			// Have to reset settings? -> do it if image changed
			DWORD imgHash = GetImgHash(ace->hbmPic);
			if (imgHash != db_get_dw(hContact, "ContactPhoto", "ImageHash", 0)) {
				db_unset(hContact, "ContactPhoto", "MakeTransparentBkg");
				db_unset(hContact, "ContactPhoto", "TranspBkgNumPoints");
				db_unset(hContact, "ContactPhoto", "TranspBkgColorDiff");

				db_set_dw(hContact, "ContactPhoto", "ImageHash", imgHash);
			}

			// Make transparent?
			if (!noTransparency && !isTransparentImage
				&& db_get_b(hContact, "ContactPhoto", "MakeTransparentBkg",
				db_get_b(0, AVS_MODULE, "MakeTransparentBkg", 0)))
			{
				if (MakeTransparentBkg(hContact, &ace->hbmPic)) {
					ace->dwFlags |= AVS_CUSTOMTRANSPBKG | AVS_HASTRANSPARENCY;
					GetObject(ace->hbmPic, sizeof(bminfo), &bminfo);
					isTransparentImage = TRUE;
				}
			}
		}
		else if (hContact == (MCONTACT)-1) { // My avatars
			if (!noTransparency && !isTransparentImage
				&& db_get_b(0, AVS_MODULE, "MakeTransparentBkg", 0)
				&& db_get_b(0, AVS_MODULE, "MakeMyAvatarsTransparent", 0))
			{
				if (MakeTransparentBkg(0, &ace->hbmPic)) {
					ace->dwFlags |= AVS_CUSTOMTRANSPBKG | AVS_HASTRANSPARENCY;
					GetObject(ace->hbmPic, sizeof(bminfo), &bminfo);
					isTransparentImage = TRUE;
				}
			}
		}

		if (db_get_b(0, AVS_MODULE, "MakeGrayscale", 0))
			ace->hbmPic = MakeGrayscale(hContact, ace->hbmPic);

		if (noTransparency) {
			fei->FI_CorrectBitmap32Alpha(ace->hbmPic, TRUE);
			isTransparentImage = FALSE;
		}

		if (bminfo.bmBitsPixel == 32 && isTransparentImage) {
			if (fei->FI_Premultiply(ace->hbmPic))
				ace->dwFlags |= AVS_HASTRANSPARENCY;

			ace->dwFlags |= AVS_PREMULTIPLIED;
		}

		if (szProto) {
			protoPicCacheEntry *pAce = (protoPicCacheEntry *)ace;
			if (hContact == 0)
				pAce->dwFlags |= AVS_PROTOPIC;
			else if (hContact == (MCONTACT)-1)
				pAce->dwFlags |= AVS_OWNAVATAR;
		}

		return 1;
	}
	return -1;
}

/////////////////////////////////////////////////////////////////////////////////////////

#define POLYNOMIAL (0x488781ED) /* This is the CRC Poly */
#define TOPBIT (1 << (WIDTH - 1)) /* MSB */
#define WIDTH 32

int GetFileHash(TCHAR* filename)
{
	HANDLE hFile = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
	if (hFile == INVALID_HANDLE_VALUE)
		return 0;

	int remainder = 0;
	char data[1024];
	DWORD dwRead;
	do
	{
		// Read file chunk
		dwRead = 0;
		ReadFile(hFile, data, 1024, &dwRead, NULL);

		/* loop through each byte of data */
		for (int byte = 0; byte < (int) dwRead; ++byte) {
			/* store the next byte into the remainder */
			remainder ^= (data[byte] << (WIDTH - 8));
			/* calculate for all 8 bits in the byte */
			for (int bit = 8; bit > 0; --bit) {
				/* check if MSB of remainder is a one */
				if (remainder & TOPBIT)
					remainder = (remainder << 1) ^ POLYNOMIAL;
				else
					remainder = (remainder << 1);
			}
		}
	}
		while(dwRead == 1024);

	CloseHandle(hFile);

	return remainder;
}

///////////////////////////////////////////////////////////////////////////////////////////////////

protoPicCacheEntry::~protoPicCacheEntry()
{
	if (hbmPic != 0)
		DeleteObject(hbmPic);
	mir_free(szProtoname);
	mir_free(tszAccName);
}

void protoPicCacheEntry::clear()
{
	if (hbmPic != 0)
		DeleteObject(hbmPic);

	memset(this, 0, sizeof(avatarCacheEntry));
}

///////////////////////////////////////////////////////////////////////////////////////////////////

BOOL Proto_IsAvatarsEnabled(const char *proto)
{
	if ( ProtoServiceExists(proto, PS_GETAVATARCAPS))
		return CallProtoService(proto, PS_GETAVATARCAPS, AF_ENABLED, 0);

	return TRUE;
}

BOOL Proto_IsAvatarFormatSupported(const char *proto, int format)
{
	if ( ProtoServiceExists(proto, PS_GETAVATARCAPS))
		return CallProtoService(proto, PS_GETAVATARCAPS, AF_FORMATSUPPORTED, format);

	if (format >= PA_FORMAT_SWF)
		return FALSE;

	return TRUE;
}

int Proto_AvatarImageProportion(const char *proto)
{
	if ( ProtoServiceExists(proto, PS_GETAVATARCAPS))
		return CallProtoService(proto, PS_GETAVATARCAPS, AF_PROPORTION, 0);

	return 0;
}

void Proto_GetAvatarMaxSize(const char *proto, int *width, int *height)
{
	if ( ProtoServiceExists(proto, PS_GETAVATARCAPS)) {
		POINT maxSize;
		CallProtoService(proto, PS_GETAVATARCAPS, AF_MAXSIZE, (LPARAM) &maxSize);
		*width = maxSize.y;
		*height = maxSize.x;
	}
	else {
		*width = 300;
		*height = 300;
	}

	if (*width < 0)
		*width = 0;
	else if (*width > 300)
		*width = 300;

	if (*height < 0)
		*height = 0;
	else if (*height > 300)
		*height = 300;
}

BOOL Proto_NeedDelaysForAvatars(const char *proto)
{
	if ( ProtoServiceExists(proto, PS_GETAVATARCAPS))
		return CallProtoService(proto, PS_GETAVATARCAPS, AF_DONTNEEDDELAYS, 0) <= 0;

	return TRUE;
}

int Proto_GetAvatarMaxFileSize(const char *proto)
{
	if ( ProtoServiceExists(proto, PS_GETAVATARCAPS))
		return CallProtoService(proto, PS_GETAVATARCAPS, AF_MAXFILESIZE, 0);

	return 0;
}

int Proto_GetDelayAfterFail(const char *proto)
{
	if ( ProtoServiceExists(proto, PS_GETAVATARCAPS))
		return CallProtoService(proto, PS_GETAVATARCAPS, AF_DELAYAFTERFAIL, 0);

	return 0;
}

BOOL Proto_IsFetchingWhenProtoNotVisibleAllowed(const char *proto)
{
	if ( ProtoServiceExists(proto, PS_GETAVATARCAPS))
		return CallProtoService(proto, PS_GETAVATARCAPS, AF_FETCHIFPROTONOTVISIBLE, 0);

	return FALSE;
}

BOOL Proto_IsFetchingWhenContactOfflineAllowed(const char *proto)
{
	if ( ProtoServiceExists(proto, PS_GETAVATARCAPS))
		return CallProtoService(proto, PS_GETAVATARCAPS, AF_FETCHIFCONTACTOFFLINE, 0);

	return FALSE;
}

/////////////////////////////////////////////////////////////////////////////////////////

protoPicCacheEntry *GetProtoDefaultAvatar(MCONTACT hContact)
{
	char *szProto = GetContactProto(hContact);
	if (szProto) {
		for (int i = 0; i < g_ProtoPictures.getCount(); i++) {
			protoPicCacheEntry& p = g_ProtoPictures[i];
			if ( !lstrcmpA(p.szProtoname, szProto) && p.hbmPic != NULL)
				return &g_ProtoPictures[i];
		}
	}
	return NULL;
}

MCONTACT GetContactThatHaveTheAvatar(MCONTACT hContact, int locked)
{
	if (db_get_b(NULL, META_PROTO, "Enabled", 0)) {
		if (db_get_dw(hContact, META_PROTO, "NumContacts", 0) >= 1) {
			if (locked == -1)
				locked = db_get_b(hContact, "ContactPhoto", "Locked", 0);

			if (!locked)
				hContact = db_mc_getMostOnline(hContact);
		}
	}
	return hContact;
}

int ChangeAvatar(MCONTACT hContact, BOOL fLoad, BOOL fNotifyHist, int pa_format)
{
	if (g_shutDown)
		return 0;

	hContact = GetContactThatHaveTheAvatar(hContact);

	// Get the node
	CacheNode *node = FindAvatarInCache(hContact, g_AvatarHistoryAvail && fNotifyHist, TRUE);
	if (node == NULL)
		return 0;

	if (fNotifyHist)
		node->dwFlags |= AVH_MUSTNOTIFY;

	node->mustLoad = fLoad ? 1 : -1;
	node->pa_format = pa_format;
	SetEvent(hLoaderEvent);
	return 0;
}

void DeleteGlobalUserAvatar()
{
	DBVARIANT dbv = {0};
	if (db_get_ts(NULL, AVS_MODULE, "GlobalUserAvatarFile", &dbv))
		return;

	TCHAR szFilename[MAX_PATH];
	AVS_pathToAbsolute(dbv.ptszVal, szFilename);
	db_free(&dbv);

	DeleteFile(szFilename);
	db_unset(NULL, AVS_MODULE, "GlobalUserAvatarFile");
}

void SetIgnoreNotify(char *protocol, BOOL ignore)
{
	for (int i = 0; i < g_MyAvatars.getCount(); i++) {
		if (protocol == NULL || !lstrcmpA(g_MyAvatars[i].szProtoname, protocol)) {
			if (ignore)
				g_MyAvatars[i].dwFlags |= AVS_IGNORENOTIFY;
			else
				g_MyAvatars[i].dwFlags &= ~AVS_IGNORENOTIFY;
		}
	}
}

///////////////////////////////////////////////////////////////////////////////////////////////////////

DWORD GetFileSize(TCHAR *szFilename)
{
	struct _stat info;
	return ( _tstat(szFilename, &info) == -1) ? 0 : info.st_size;
}