#include <vector>
#include <cmath>
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
#include <locale>
#include <iomanip>
#include <time.h>
#include "gnuplot-iostream.h"

std::tm getTm(std::string timeString)
{
    std::tm t = {};
    strptime(timeString.c_str(), "%b %d %H:%M:%S %Y", &t);
    return t;
}

int main (int argc, char* argv[]) 
{
    if(argc != 2) 
    {
        std::cout<<"Plsese supply a log file name\n";
        return 1;
    }
    
    std::ifstream file(argv[1], std::ifstream::in);
    if(!file.is_open())
    {
        std::cout<<"Invalid file name\n";
        return 1;
    }
    
    std::vector< std::pair <std::time_t, unsigned> > data;
    std::string buffer;
    while(file.good())
    {
        std::getline(file, buffer);
        if(buffer.find("SENSOR TYPE: 1 ID: 1") != std::string::npos)
        {
            std::stringstream ssBuffer(buffer);
            std::vector< std::string > tokens;
            std::string tmp;
            while( getline(ssBuffer, tmp, ' ') )
            {
                tokens.push_back(tmp);
                while(ssBuffer.peek() == ' ')
                {
                    ssBuffer.get();
                }
                
            }
            std::string dateString;
            for(unsigned i = 1; i < tokens.size() && i < 5; ++i) dateString += tokens[i] + ' ';
            std::tm t = getTm(dateString);
            std::time_t time = mktime(&t);
            int temperature = std::stoi(tokens.back());
            if( temperature < 500 ) data.push_back(std::pair< std::time_t, unsigned > (time, temperature));
        }
    }
    
	Gnuplot gp("gnuplot");

	gp << "set xrange ["<<std::get<0>(data.front())<<':'<<std::get<0>(data.back())<<']'<<"\nset yrange [0:300]\n";
	// Data will be sent via a temporary file.  These are erased when you call
	// gp.clearTmpfiles() or when gp goes out of scope.  If you pass a filename
	// (e.g. "gp.file1d(pts, 'mydata.dat')"), then the named file will be created
	// and won't be deleted (this is useful when creating a script).
	gp << "plot" << gp.file1d(data) << "with lines title 'cubic'"<< std::endl;
    std::cin.get();
    return 0;
}