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#include <cstdio>
#include <list>
#include <map>
#include "kgramstats.h"
#include <ctime>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <twitter.h>
#include <yaml-cpp/yaml.h>
#include <thread>
#include <chrono>

int main(int argc, char** args)
{
  srand(time(NULL));
  rand(); rand(); rand(); rand();
	
  YAML::Node config = YAML::LoadFile("config.yml");
  int delay = config["delay"].as<int>();
  
  twitter::auth auth;
  auth.setConsumerKey(config["consumer_key"].as<std::string>());
  auth.setConsumerSecret(config["consumer_secret"].as<std::string>());
  auth.setAccessKey(config["access_key"].as<std::string>());
  auth.setAccessSecret(config["access_secret"].as<std::string>());
  
  twitter::client client(auth);

  std::ifstream infile(config["corpus"].as<std::string>().c_str());
  std::string corpus;
  std::string line;
  while (getline(infile, line))
  {
    if (line.back() == '\r')
    {
      line.pop_back();
    }
    
    corpus += line + "\n ";
  }

  std::cout << "Preprocessing corpus..." << std::endl;
  kgramstats* stats = new kgramstats(corpus, 4);
  std::mutex stats_mutex;
  
  client.setUserStreamNotifyCallback([&] (twitter::notification n) {
    if (n.getType() == twitter::notification::type::tweet)
    {
      std::string original = n.getTweet().getText();
      std::string canonical;
      std::transform(std::begin(original), std::end(original), std::back_inserter(canonical), [] (char ch) {
        return std::tolower(ch);
      });
      
      if (canonical.find("@rawr_ebooks") != std::string::npos)
      {
        std::string doc = "@" + n.getTweet().getAuthor().getScreenName() + " ";
        {
          std::lock_guard<std::mutex> stats_lock(stats_mutex);
          doc += stats->randomSentence(140 - doc.length());
          doc.resize(140);
        }
        
        twitter::tweet tw;
        twitter::response resp = client.updateStatus(doc, tw, n.getTweet());
        if (resp != twitter::response::ok)
        {
          std::cout << "Twitter error while tweeting: " << resp << std::endl;
        }
      }
    }
  });
  
  client.startUserStream();
  std::this_thread::sleep_for(std::chrono::minutes(1));

  std::cout << "Generating..." << std::endl;
  for (;;)
  {
    std::string doc;
    {
      std::lock_guard<std::mutex> stats_lock(stats_mutex);
      doc = stats->randomSentence(140);
    }
    doc.resize(140);
    
    twitter::tweet tw;
    twitter::response resp = client.updateStatus(doc, tw);
    if (resp != twitter::response::ok)
    {
      std::cout << "Twitter error while tweeting: " << resp << std::endl;
    }
    
    int waitlen = rand() % delay;
    if (waitlen == 0)
    {
      continue;
    } else if (waitlen == 1)
    {
      std::cout << "Sleeping for 1 second..." << std::endl;
    } else if (waitlen < 60)
    {
      std::cout << "Sleeping for " << waitlen << " seconds..." << std::endl;
    } else if (waitlen == 60)
    {
      std::cout << "Sleeping for 1 minute..." << std::endl;
    } else if (waitlen < 60*60)
    {
      std::cout << "Sleeping for " << (waitlen/60) << " minutes..." << std::endl;
    } else if (waitlen == 60*60)
    {
      std::cout << "Sleeping for 1 hour..." << std::endl;
    } else if (waitlen < 60*60*24)
    {
      std::cout << "Sleeping for " << (waitlen/60/60) << " hours..." << std::endl;
    } else if (waitlen == 60*60*24)
    {
      std::cout << "Sleeping for 1 day..." << std::endl;
    } else {
      std::cout << "Sleeping for " << (waitlen/60/60/24) << " days..." << std::endl;
    }

    std::this_thread::sleep_for(std::chrono::seconds(waitlen));
  }
	
  return 0;
}