#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "downloadfile.h"
#include "tools.h"
#include <pstreams/pstream.h>
#include <sstream>
#include <string>
#include <cstring>
#include <iostream>
#include <stdio.h>
#include <QMessageBox>
#include <vector>
#include <boost/algorithm/string/replace.hpp>
#include <memory>
#include <stdexcept>
#include <array>
#include <unistd.h>
#include <sys/types.h>

using namespace std;

downloadFile::downloadFile()
{
}

void downloadFile::cancelled(int pid)
{
    if (kill(pid, SIGTERM) == -1)
    {
        //TODO gestion erreur kill
    }
}

void downloadFile::download(MainWindow *mw)
{
    string line;
    string errorRsync;
    int pos;
    array<string, 7> argv;
    stringstream output;
    vector<string> v;
    int value;
    char buffer[4096];

    argv[0] = "/usr/bin/rsync";
    if (mw->connexion.bandwidthLimit == 0)
    {
        argv[1] = "--bwlimit=1000P";
    }else
    {
        output << mw->connexion.bandwidthLimit;
        argv[1] = "--bwlimit=" + output.str() +  mw->connexion.bandwidthLimitUnit;
    }
    argv[2] = "--port=" + to_string(mw->connexion.port);
    argv[3] = "-P";
    argv[4] = mw->connexion.server + "::" + mw->downloading.service + "/" + mw->downloading.path;
    argv[5] = mw->downloading.savePath + "/";
    argv[6] = "";

    //launching downloading thread
    FILE * fp = popen2(argv, "r", mw->downloading.pid);
    if (!fp)
    {
        throw runtime_error("popen2() failed!");
        return;
    }

    while (fgets(buffer, 4096, fp) != nullptr)
    {
        if (this->canceled == true)
        {
            return;
        }
        line = buffer;
        pos = line.find('%');
        if (pos != -1)
        {
            line.erase(pos);
            pos = line.find_last_of(' ');
            if (pos != -1)
            {
                line.erase(0, pos);
                value = stoi(line);
                emit progressSignal(value);
            }
        }
    }
    pclose2(fp, mw->downloading.pid);

    // ProgressBar to 100% and emit signal finished to main application
    emit progressSignal(100);
    emit finishedSignal(true);
}