#include <iostream>
#include <vector>
#include <sstream>

#ifndef _LOG_
#define _LOG_

class Log {
public:
    Log() {}
    Log(unsigned int s) {size = s;}
    ~Log() {
    }
    template<typename T>
    Log& operator<<(const T &msg) {
        std::stringstream current_string;
        current_string << msg;
        os << msg;

        if (current_string.str().back() == '\n') {
          std::cout << "LOG: " << os.str();
          if (current >= size || full) {
            if (ctr >= size) {
              ctr = 0;
            }
            buffer[ctr] = os.str();
            full = true;
          } else {
            buffer.push_back(os.str());
          }
          ctr++;
          current++;
          os.str("");
        }
        return *this;
    }
    std::vector<std::string> getLogs() {
      std::vector<std::string> result;
      int iterator_limit = std::min(size, current);
      for (int i = iterator_limit - 1; i >= 0; i--) {
        result.emplace_back(buffer[(current - 1 - i) % size]);
      }
      return result;
    }

private:
    unsigned int current = 0;
    unsigned int ctr = 0;
    bool full = false;
    std::vector<std::string> buffer;
    std::stringstream os;
    unsigned int size = 255;
};

#endif