#ifndef DOWNLOAD_CLIENT_H
#define DOWNLOAD_CLIENT_H

#include <string>
#include <vector>
#include <QObject>
#include "SslClient.h"

using std::pair;
using std::string;
using std::vector;

class QFile;

class DownloadClient: public SslClient 
{
Q_OBJECT
	
public:
	/**
	 * @brief	Initialize new DownloadClient instance
	 */
	DownloadClient();
	
	/**
	 * @brief 	Initialize new DownloadClient instance
	 * @param	addr	server address or hostname to connect to
	 */
	DownloadClient(QString addr);
	
	/**
	 * @brief	Download file from server
	 * @param	file	file path on client machine
	 */
	void Download(const string &file);
	
	/**
	 * @brief	Download file from server
	 * @param	file	pair of file name and it's md5 hash value
	 */
	void Download(const pair<string, string> &file);
	
	/**
	 * @brief	Download list of files
	 * @param	files	associative array of file names and it's md5 hashes
	 * @note	this is designated method among all of three
	 */
	void Download(const vector<pair<string, string> > &files);

signals:
	/**
	 * @brief	This signal is emitted when all files have been downloaded
	 */
	void downloadFinished();

private:
	/**
	 * @brief	indicates that program is downloading file(s) right now
	 */
	bool isDownloading;
	
	/**
	 * @brief	name of file that is being downloaded
	 */
	QFile *current;
	
	/**
	 * @brief	index of file that is being downloaded
	 */
	int currentId;
	
	/**
	 * @brief	List of file to
	 */
	vector<pair<string, string> > files;
	
	/**
	 * @brief	start file-by-file downloading process
	 */
	void DoDownload();

private slots:
	void FileDataRecieved(SslClient::RequestType &type, QByteArray &confdata);
};

#endif