/*
Copyright (c) 2011-2014, Mathieu Labbe - IntRoLab - Universite de Sherbrooke
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the Universite de Sherbrooke nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <QtNetwork/QNetworkInterface>
#include <QtNetwork/QTcpSocket>
#include <QtCore/QCoreApplication>
#include <QtCore/QFile>
#include <QtCore/QFileInfo>
#include <QtCore/QTime>
#include <opencv2/opencv.hpp>
#include <find_object/TcpServer.h>

void showUsage()
{
	printf("\ntcpService [options] port\n"
			"  Options:\n"
			"    --add \"image.png\" #    Add object (file name + id). Set id=0\n"
			"                           will make the server generating an id.\n"
			"    --remove #             Remove object by ID.\n"
			"    --host #.#.#.#         Set host address.\n"
			"    --help                 Show this help.\n"
			"  Examples:\n"
			"     Add:    $ tcpService --add image.png 1 --host 127.0.0.1 4000\n"
			"     Remove: $ tcpService --remove 1 --host 127.0.0.1 4000\n");
	exit(-1);
}

int main(int argc, char * argv[])
{
	QString ipAddress;
	QString fileName;
	int addId = 0;
	int removeId = -1;
	quint16 port = 0;

	for(int i=1; i<argc-1; ++i)
	{
		if(strcmp(argv[i], "--host") == 0 || strcmp(argv[i], "-host") == 0)
		{
			++i;
			if(i < argc)
			{
				ipAddress = argv[i];
			}
			else
			{
				printf("error parsing --host\n");
				showUsage();
			}
			continue;
		}
		if(strcmp(argv[i], "--add") == 0 || strcmp(argv[i], "-add") == 0)
		{
			++i;
			if(i < argc-1)
			{
				fileName = argv[i];
				++i;
				if(i < argc)
				{
					addId = atoi(argv[i]);
				}
				else
				{
					printf("error parsing --add\n");
				}
			}
			else
			{
				printf("error parsing --add\n");
				showUsage();
			}
			continue;
		}
		if(strcmp(argv[i], "--remove") == 0 || strcmp(argv[i], "-remove") == 0)
		{
			++i;
			if(i < argc)
			{
				removeId = std::atoi(argv[i]);
			}
			else
			{
				printf("error parsing --remove\n");
				showUsage();
			}
			continue;
		}
		if(strcmp(argv[i], "-help") == 0 ||
		   strcmp(argv[i], "--help") == 0)
		{
			showUsage();
		}

		printf("Unrecognized option: %s\n", argv[i]);
		showUsage();
	}

	port = atoi(argv[argc-1]);

	if(fileName.isEmpty() && removeId == -1)
	{
		printf("Arguments --add or --remove should be set.\n");
		showUsage();
	}
	else if(port <=0)
	{
		printf("Port should be set!\n");
		showUsage();
	}

	if(ipAddress.isEmpty())
	{
		ipAddress = QHostAddress(QHostAddress::LocalHost).toString();
	}

	cv::Mat image;
	if(!fileName.isEmpty())
	{
		image = cv::imread(fileName.toStdString());
		if(image.empty())
		{
			printf("Cannot read image from \"%s\".\n", fileName.toStdString().c_str());
			showUsage();
		}
		fileName = QFileInfo(fileName).fileName();
	}

	QCoreApplication app(argc, argv);
	QTcpSocket request;

	QObject::connect(&request, SIGNAL(disconnected()), &app, SLOT(quit()));
	QObject::connect(&request, SIGNAL(error(QAbstractSocket::SocketError)), &app, SLOT(quit()));
	QObject::connect(&request, SIGNAL(bytesWritten(quint64)), &app, SLOT(quit()));

	printf("Connecting to \"%s:%d\"...\n", ipAddress.toStdString().c_str(), port);
	request.connectToHost(ipAddress, port);

	if(!request.waitForConnected())
	{
		printf("Connecting to \"%s:%d\"... connection failed!\n", ipAddress.toStdString().c_str(), port);
		return -1;
	}
	else
	{
		printf("Connecting to \"%s:%d\"... connected!\n", ipAddress.toStdString().c_str(), port);
	}

	QByteArray block;
	QDataStream out(&block, QIODevice::WriteOnly);
	out.setVersion(QDataStream::Qt_4_0);
	out << (quint64)0;

	if(!image.empty())
	{
		// publish image
		std::vector<unsigned char> buf;
		cv::imencode(".png", image, buf);

		out << (quint32)find_object::TcpServer::kAddObject;
		out << addId;
		out << fileName;
		quint64 imageSize = buf.size();
		out << imageSize;
		out.writeRawData((char*)buf.data(), (int)buf.size());
		printf("Add object %d \"%s\"\n", addId, fileName.toStdString().c_str());
	}
	else if(removeId)
	{
		out << (quint32)find_object::TcpServer::kRemoveObject;
		out << removeId;
		printf("Remove object %d\n", removeId);
	}

	out.device()->seek(0);
	out << (quint64)(block.size() - sizeof(quint64));

	qint64 bytes = request.write(block);
	printf("Service published (%d bytes)!\n", (int)bytes);
	request.waitForReadyRead();

	return 0;
}