#include "stdafx.h"

/* FILE RECEIVING */

// incoming transfer flow
void CToxProto::OnFriendFile(Tox*, uint32_t friendNumber, uint32_t fileNumber, uint32_t kind, uint64_t fileSize, const uint8_t *fileName, size_t filenameLength, void *arg)
{
	CToxProto *proto = (CToxProto*)arg;

	MCONTACT hContact = proto->GetContact(friendNumber);
	if (hContact)
	{
		switch (kind)
		{
		case TOX_FILE_KIND_AVATAR:
			{
				proto->logger->Log(__FUNCTION__": incoming avatar (%d) from (%d)", fileNumber, friendNumber);

				ptrT address(proto->getTStringA(hContact, TOX_SETTINGS_ID));
				TCHAR avatarName[MAX_PATH];
				mir_sntprintf(avatarName, MAX_PATH, _T("%s.png"), address);

				AvatarTransferParam *transfer = new AvatarTransferParam(friendNumber, fileNumber, avatarName, fileSize);
				transfer->pfts.flags |= PFTS_RECEIVING;
				transfer->pfts.hContact = hContact;
				proto->transfers.Add(transfer);

				TOX_ERR_FILE_GET error;
				tox_file_get_file_id(proto->toxThread->tox, friendNumber, fileNumber, transfer->hash, &error);
				if (error != TOX_ERR_FILE_GET_OK)
				{
					proto->logger->Log(__FUNCTION__": unable to get avatar hash (%d) from (%d) cause (%d)", fileNumber, friendNumber, error);
					memset(transfer->hash, 0, TOX_HASH_LENGTH);
				}
				proto->OnGotFriendAvatarInfo(transfer);
			}
			break;

		case TOX_FILE_KIND_DATA:
			{
				proto->logger->Log(__FUNCTION__": incoming file (%d) from (%d)", fileNumber, friendNumber);

				ptrA rawName((char*)mir_alloc(filenameLength + 1));
				memcpy(rawName, fileName, filenameLength);
				rawName[filenameLength] = 0;
				TCHAR *name = mir_utf8decodeT(rawName);

				FileTransferParam *transfer = new FileTransferParam(friendNumber, fileNumber, name, fileSize);
				transfer->pfts.flags |= PFTS_RECEIVING;
				transfer->pfts.hContact = hContact;
				proto->transfers.Add(transfer);

				PROTORECVFILET pre = { 0 };
				pre.dwFlags = PRFF_TCHAR;
				pre.fileCount = 1;
				pre.timestamp = time(NULL);
				pre.descr.t = _T("");
				pre.files.t = &name;
				pre.lParam = (LPARAM)transfer;
				ProtoChainRecvFile(hContact, &pre);
			}
			break;

		default:
			proto->logger->Log(__FUNCTION__": unsupported transfer (%d) from (%d) with type (%d)", fileNumber, friendNumber, kind);
			return;
		}
	}
}

// file request is allowed
HANDLE CToxProto::OnFileAllow(MCONTACT hContact, HANDLE hTransfer, const TCHAR *tszPath)
{
	FileTransferParam *transfer = (FileTransferParam*)hTransfer;
	transfer->pfts.tszWorkingDir = mir_tstrdup(tszPath);

	// stupid fix
	TCHAR fullPath[MAX_PATH];
	mir_sntprintf(fullPath, _T("%s\\%s"), transfer->pfts.tszWorkingDir, transfer->pfts.tszCurrentFile);
	transfer->ChangeName(fullPath);

	if (!ProtoBroadcastAck(hContact, ACKTYPE_FILE, ACKRESULT_FILERESUME, (HANDLE)transfer, (LPARAM)&transfer->pfts))
	{
		int action = FILERESUME_OVERWRITE;
		const TCHAR **szFilename = (const TCHAR**)mir_alloc(sizeof(TCHAR*) * 2);
		szFilename[0] = fullPath;
		szFilename[1] = NULL;
		OnFileResume(hTransfer, &action, szFilename);
		mir_free(szFilename);
	}

	return hTransfer;
}

// if file is exists
int CToxProto::OnFileResume(HANDLE hTransfer, int *action, const TCHAR **szFilename)
{
	FileTransferParam *transfer = (FileTransferParam*)hTransfer;

	if (*action == FILERESUME_SKIP)
	{
		tox_file_control(toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
		transfers.Remove(transfer);
		return 0;
	}

	if (*action == FILERESUME_RENAME)
		transfer->ChangeName(*szFilename);

	TCHAR *mode = *action == FILERESUME_OVERWRITE ? _T("wb") : _T("ab");
	if (!transfer->OpenFile(mode))
	{
		logger->Log(__FUNCTION__": failed to open file (%d) from (%d)", transfer->fileNumber, transfer->friendNumber);
		tox_file_control(toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
		transfers.Remove(transfer);
		return NULL;
	}

	TOX_ERR_FILE_CONTROL error;
	logger->Log(__FUNCTION__": start receiving file (%d) from (%d)", transfer->fileNumber, transfer->friendNumber);
	if (!tox_file_control(toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_RESUME, &error))
	{
		logger->Log(__FUNCTION__": failed to start receiving of file(%d) from (%d) cause (%d)", transfer->fileNumber, transfer->friendNumber, error);
		ProtoBroadcastAck(transfer->pfts.hContact, ACKTYPE_FILE, ACKRESULT_FAILED, (HANDLE)transfer, 0);
		tox_file_control(toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
		transfers.Remove(transfer);
	}

	return 0;
}

void CToxProto::OnTransferCompleted(FileTransferParam *transfer)
{
	logger->Log(__FUNCTION__": finised the transfer of file (%d) from (%d)", transfer->fileNumber, transfer->friendNumber);
	bool isFileFullyTransfered = transfer->pfts.currentFileProgress == transfer->pfts.currentFileSize;
	if (!isFileFullyTransfered)
		logger->Log(__FUNCTION__": file (%d) from (%d) is transferred not completely", transfer->fileNumber, transfer->friendNumber);

	if (transfer->transferType == TOX_FILE_KIND_AVATAR)
	{
		OnGotFriendAvatarData((AvatarTransferParam*)transfer);
		return;
	}

	ProtoBroadcastAck(transfer->pfts.hContact, ACKTYPE_FILE, isFileFullyTransfered ? ACKRESULT_SUCCESS : ACKRESULT_FAILED, (HANDLE)transfer, 0);
	transfers.Remove(transfer);
}

// getting the file data
void CToxProto::OnDataReceiving(Tox*, uint32_t friendNumber, uint32_t fileNumber, uint64_t position, const uint8_t *data, size_t length, void *arg)
{
	CToxProto *proto = (CToxProto*)arg;

	FileTransferParam *transfer = proto->transfers.Get(friendNumber, fileNumber);
	if (transfer == NULL)
	{
		proto->logger->Log(__FUNCTION__": failed to find transfer (%d) from (%d)", fileNumber, friendNumber);
		return;
	}

	//receiving is finished
	if (length == 0 || position == UINT64_MAX)
	{
		proto->OnTransferCompleted(transfer);
		return;
	}

	MCONTACT hContact = proto->GetContact(friendNumber);
	if (hContact == NULL)
	{
		proto->logger->Log(__FUNCTION__": cannot find contact by number (%d)", friendNumber);
		tox_file_control(proto->toxThread->tox, friendNumber, fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
		return;
	}

	uint64_t filePos = _ftelli64(transfer->hFile);
	if (filePos != position)
		_fseeki64(transfer->hFile, position, SEEK_SET);

	if (fwrite(data, sizeof(uint8_t), length, transfer->hFile) != length)
	{
		proto->logger->Log(__FUNCTION__": failed write to file (%d)", fileNumber);
		proto->ProtoBroadcastAck(transfer->pfts.hContact, ACKTYPE_FILE, ACKRESULT_FAILED, (HANDLE)transfer, 0);
		tox_file_control(proto->toxThread->tox, friendNumber, fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
		return;
	}

	transfer->pfts.totalProgress = transfer->pfts.currentFileProgress += length;
	proto->ProtoBroadcastAck(transfer->pfts.hContact, ACKTYPE_FILE, ACKRESULT_DATA, (HANDLE)transfer, (LPARAM)&transfer->pfts);
}

/* FILE SENDING */

// outcoming file flow
HANDLE CToxProto::OnSendFile(MCONTACT hContact, const TCHAR*, TCHAR **ppszFiles)
{
	int32_t friendNumber = GetToxFriendNumber(hContact);
	if (friendNumber == UINT32_MAX)
		return NULL;


	FILE *hFile = _tfopen(ppszFiles[0], _T("rb"));
	if (hFile == NULL)
	{
		logger->Log(__FUNCTION__": cannot open file %s", ppszFiles[0]);
		return NULL;
	}

	TCHAR *fileName = _tcsrchr(ppszFiles[0], '\\') + 1;
	size_t fileDirLength = fileName - ppszFiles[0];
	TCHAR *fileDir = (TCHAR*)mir_alloc(sizeof(TCHAR)*(fileDirLength + 1));
	_tcsncpy(fileDir, ppszFiles[0], fileDirLength);
	fileDir[fileDirLength] = '\0';

	_fseeki64(hFile, 0, SEEK_END);
	uint64_t fileSize = _ftelli64(hFile);
	rewind(hFile);

	char *name = mir_utf8encodeW(fileName);
	TOX_ERR_FILE_SEND sendError;
	uint32_t fileNumber = tox_file_send(toxThread->tox, friendNumber, TOX_FILE_KIND_DATA, fileSize, NULL, (uint8_t*)name, mir_strlen(name), &sendError);
	if (sendError != TOX_ERR_FILE_SEND_OK)
	{
		logger->Log(__FUNCTION__": failed to send file (%d) to (%d) cause (%d)", fileNumber, friendNumber, sendError);
		mir_free(fileDir);
		mir_free(name);
		return NULL;
	}
	logger->Log(__FUNCTION__": start sending file (%d) to (%d)", fileNumber, friendNumber);

	FileTransferParam *transfer = new FileTransferParam(friendNumber, fileNumber, fileName, fileSize);
	transfer->pfts.flags |= PFTS_SENDING;
	transfer->pfts.hContact = hContact;
	transfer->pfts.tszWorkingDir = fileDir;
	transfer->hFile = hFile;
	transfers.Add(transfer);

	mir_free(name);
	return (HANDLE)transfer;
}

void CToxProto::OnFileSendData(Tox*, uint32_t friendNumber, uint32_t fileNumber, uint64_t position, size_t length, void *arg)
{
	CToxProto *proto = (CToxProto*)arg;

	FileTransferParam *transfer = proto->transfers.Get(friendNumber, fileNumber);
	if (transfer == NULL)
	{
		proto->logger->Log(__FUNCTION__": failed to find transfer (%d) to (%d)", fileNumber, friendNumber);
		return;
	}

	if (length == 0)
	{
		// file sending is finished
		proto->logger->Log(__FUNCTION__": finised the transfer of file (%d) to (%d)", fileNumber, friendNumber);
		bool isFileFullyTransfered = transfer->pfts.currentFileProgress == transfer->pfts.currentFileSize;
		if (!isFileFullyTransfered)
			proto->logger->Log(__FUNCTION__": file (%d) is not completely transferred to (%d)", fileNumber, friendNumber);
		proto->ProtoBroadcastAck(transfer->pfts.hContact, ACKTYPE_FILE, isFileFullyTransfered ? ACKRESULT_SUCCESS : ACKRESULT_FAILED, (HANDLE)transfer, 0);
		proto->transfers.Remove(transfer);
		return;
	}

	uint64_t sentBytes = _ftelli64(transfer->hFile);
	if (sentBytes != position)
		_fseeki64(transfer->hFile, position, SEEK_SET);

	uint8_t *data = (uint8_t*)mir_alloc(length);
	if (fread(data, sizeof(uint8_t), length, transfer->hFile) != length)
	{
		proto->logger->Log(__FUNCTION__": failed to read from file (%d) to (%d)", fileNumber, friendNumber);
		proto->ProtoBroadcastAck(transfer->pfts.hContact, ACKTYPE_FILE, ACKRESULT_FAILED, (HANDLE)transfer, 0);
		tox_file_control(proto->toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
		mir_free(data);
		return;
	}

	TOX_ERR_FILE_SEND_CHUNK error;
	if (!tox_file_send_chunk(proto->toxThread->tox, friendNumber, fileNumber, position, data, length, &error))
	{
		if (error == TOX_ERR_FILE_SEND_CHUNK_FRIEND_NOT_CONNECTED)
		{
			mir_free(data);
			return;
		}
		proto->logger->Log(__FUNCTION__": failed to send file chunk (%d) to (%d) cause (%d)", fileNumber, friendNumber, error);
		proto->ProtoBroadcastAck(transfer->pfts.hContact, ACKTYPE_FILE, ACKRESULT_FAILED, (HANDLE)transfer, 0);
		tox_file_control(proto->toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
		mir_free(data);
		return;
	}

	transfer->pfts.totalProgress = transfer->pfts.currentFileProgress += length;
	proto->ProtoBroadcastAck(transfer->pfts.hContact, ACKTYPE_FILE, ACKRESULT_DATA, (HANDLE)transfer, (LPARAM)&transfer->pfts);

	mir_free(data);
}

/* COMMON */

// file request is cancelled
int CToxProto::OnFileCancel(MCONTACT, HANDLE hTransfer)
{
	FileTransferParam *transfer = (FileTransferParam*)hTransfer;
	logger->Log(__FUNCTION__": Transfer (%d) is canceled", transfer->fileNumber);
	tox_file_control(toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
	transfers.Remove(transfer);

	return 0;
}

void CToxProto::PauseOutgoingTransfers(uint32_t friendNumber)
{
	for (size_t i = 0; i < transfers.Count(); i++)
	{
		// only for sending
		FileTransferParam *transfer = transfers.GetAt(i);
		if (transfer->friendNumber == friendNumber && transfer->GetDirection() == 0)
		{
			logger->Log(__FUNCTION__": sending ask to pause the transfer of file (%d) to (%d)", transfer->fileNumber, transfer->friendNumber);
			TOX_ERR_FILE_CONTROL error;
			if (!tox_file_control(toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_PAUSE, &error))
			{
				logger->Log(__FUNCTION__": failed to pause the transfer (%d) to (%d) cause(%d)", transfer->fileNumber, transfer->friendNumber, error);
				tox_file_control(toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
			}
		}
	}
}

void CToxProto::ResumeIncomingTransfers(uint32_t friendNumber)
{
	for (size_t i = 0; i < transfers.Count(); i++)
	{
		// only for receiving
		FileTransferParam *transfer = transfers.GetAt(i);
		if (transfer->friendNumber == friendNumber && transfer->GetDirection() == 1)
		{
			logger->Log(__FUNCTION__": sending ask to resume the transfer of file (%d) from (%d) cause(%d)", transfer->fileNumber, transfer->friendNumber);
			TOX_ERR_FILE_CONTROL error;
			if (!tox_file_control(toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_RESUME, &error))
			{
				logger->Log(__FUNCTION__": failed to resume the transfer (%d) from (%d) cause(%d)", transfer->fileNumber, transfer->friendNumber, error);
				tox_file_control(toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
			}
		}
	}
}

void CToxProto::CancelAllTransfers()
{
	for (size_t i = 0; i < transfers.Count(); i++)
	{
		FileTransferParam *transfer = transfers.GetAt(i);
		if (toxThread && toxThread->tox)
			tox_file_control(toxThread->tox, transfer->friendNumber, transfer->fileNumber, TOX_FILE_CONTROL_CANCEL, NULL);
		ProtoBroadcastAck(transfer->pfts.hContact, ACKTYPE_FILE, ACKRESULT_DENIED, (HANDLE)transfer, 0);
		transfers.Remove(transfer);
	}
}

void CToxProto::OnFileRequest(Tox*, uint32_t friendNumber, uint32_t fileNumber, TOX_FILE_CONTROL control, void *arg)
{
	CToxProto *proto = (CToxProto*)arg;

	MCONTACT hContact = proto->GetContact(friendNumber);
	if (hContact)
	{
		FileTransferParam *transfer = proto->transfers.Get(friendNumber, fileNumber);
		if (transfer == NULL)
		{
			proto->logger->Log(__FUNCTION__": failed to find transfer (%d)", fileNumber);
			return;
		}

		switch (control)
		{
		case TOX_FILE_CONTROL_PAUSE:
			break;

		case TOX_FILE_CONTROL_RESUME:
			break;

		case TOX_FILE_CONTROL_CANCEL:
			proto->ProtoBroadcastAck(transfer->pfts.hContact, ACKTYPE_FILE, ACKRESULT_DENIED, (HANDLE)transfer, 0);
			proto->transfers.Remove(transfer);
			break;
		}
	}
}