#include <iostream>

#include "chaiscript.hpp"

void print_help() {
    std::cout << "ChaiScript evaluator.  To evaluate and expression, type it and press <enter>." << std::endl;
    std::cout << "Additionally, you can inspect the runtime system using:" << std::endl;
    std::cout << "  dump_system() - outputs all functions registered to the system" << std::endl;
    std::cout << "  dump_object(x) - dumps information about the given symbol" << std::endl;
}

int main(int argc, char *argv[]) {
  

    std::string input;

    chaiscript::ChaiScript_Engine chai;
    chai.build_eval_system();

    if (argc < 2) {
        std::cout << "eval> ";
        std::getline(std::cin, input);
        while (input != "quit") {

            dispatchkit::Boxed_Value val;

            if (input == "help") {
                print_help();
            }
            else {
                val = chai.evaluate_string(input);

                if (val.get_type_info().m_bare_type_info && *(val.get_type_info().m_bare_type_info) != typeid(void)) {
                    try {
                        dispatchkit::dispatch(chai.get_eval_engine().get_function("print"), dispatchkit::Param_List_Builder() << val);
                    } catch (const std::runtime_error &e) {
                        std::cout << e.what() << std::endl;
                    }
                }
            }

            std::cout << "eval> ";
            std::getline(std::cin, input);
        }
    }
    else {
        for (int i = 1; i < argc; ++i) {
            try {
              dispatchkit::Boxed_Value val = chai.evaluate_file(argv[i]);
            }
            catch (std::exception &) {
                std::cerr << "Could not open: " << argv[i] << std::endl;
                exit(1);
            }
        }
    }
}