#include <iostream>

#include <chaiscript/chaiscript.hpp>

#ifdef READLINE_AVAILABLE
#include <readline/history.h>
#include <readline/readline.h>
#endif

std::string get_next_command() {
#ifdef READLINE_AVAILABLE
  char *input_raw;
  input_raw = readline("eval> ");
  add_history(input_raw);
  return std::string(input_raw);
#else
  std::string retval;
  std::cout << "eval> ";
  std::getline(std::cin, retval);
  return retval;
#endif
}

void function(void) {
  // do nothing
}

class test {
  chaiscript::ChaiScript chai;
  chaiscript::ChaiScript::State backupState = chai.get_state();

public:
  void ResetState() {
    chai.set_state(backupState);
    chai.add(chaiscript::fun(&function), "Whatever()");
  }

  void RunFile(std::string sFile) {
    try {
      chaiscript::Boxed_Value val = chai.eval_file(sFile);
    } catch (std::exception &e) {
      std::cout << e.what() << '\n';
    }
  }
};

int main(int /*argc*/, char * /*argv*/[]) {
  test myChai;

  std::string command = "";

  //
  // this loop increases memory usage, if RunFile is not called (just hitting enter)
  // as soon RunFile gets called, memory will be freed.
  //
  // scenario1 - RunFile gets called every Loop: memory usage does not change
  // scenario2 - RunFile gets never called (just hitting enter): memory usage increases every loop
  // scenario3 - RunFile gets in changing intervals: memory usage goes up and down, but never as
  //            low as in case 1 scenario3 :

  while (command != "quit") {
    for (int i = 1; i < 200; i++)
      myChai.ResetState();

    if (command == "runfile")
      myChai.RunFile("Test.chai");

    command = get_next_command();
  }
}