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#include <cstdio>
#include <list>
#include <map>
#include "kgramstats.h"
#include <ctime>
#include <vector>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include "freevars.h"

int main(int argc, char** args)
{
	srand(time(NULL));
    
    if (argc == 1)
    {
        std::cout << "rawr-gen, version 1.0" << std::endl;
        std::cout << "Usage: rawr-gen corpus-file" << std::endl;
        std::cout << "  where 'corpus-file' is the path to your input" << std::endl;
        
        return 0;
    }
    
	std::ifstream infile(args[1]);
    if (!infile)
    {
        std::cout << "rawr-gen, version 1.0" << std::endl;
        std::cout << "Usage: rawr-gen corpus-file" << std::endl;
        std::cout << "  where 'corpus-file' is the path to your input" << std::endl;
        std::cout << std::endl;
        std::cout << "The file you specified does not exist." << std::endl;
        
        return 0;
    }
    
	std::string corpus;
	std::string line;
	while (getline(infile, line))
	{
		corpus += line + "\n ";
	}
	
    std::cout << "Preprocessing corpus..." << std::endl;
	kgramstats* stats = new kgramstats(corpus, 4);
    
    std::cout << "Preprocessing freevars..." << std::endl;
    freevars* vars = new freevars();
    vars->addVar("name", "names.txt");
    vars->addVar("noun", "nouns.txt");
    
    std::cout << "Generating..." << std::endl;
	for (;;)
	{
		std::vector<std::string> doc = stats->randomSentence(rand() % 35 + 45);
		std::string hi;
		for (std::vector<std::string>::iterator it = doc.begin(); it != doc.end(); ++it)
		{
			hi += vars->parse(*it) + " ";
		}
    
    size_t firstperiod = hi.find_first_of(".!?");
    if (firstperiod != std::string::npos)
    {
      hi = hi.substr(firstperiod+2);
    }
    
    hi.resize(140);

		size_t lastperiod = hi.find_last_of(".!?");
		if ((lastperiod != std::string::npos) && (rand() % 3 > 0))
		{
			hi = hi.substr(0, lastperiod+1);
		}

		std::cout << hi << std::endl;
		
        getc(stdin);
	}
	
	return 0;
}