#include "Utils/ConfigManager.hpp"
#include "precomp.hpp"
#include <fstream>
#include <json/json.h>
#include <iostream>
#include <string>

namespace Chattr {
ConfigManager::Config ConfigManager::load() {
  Config config;

  std::ifstream configfile("config.json", std::ifstream::binary);
  if (!configfile.is_open()) {
    std::ofstream defaultConfig("config.json", std::ios::out);
    config.configJsonRoot["IP Version"] = 6;
    config.configJsonRoot["Listen Port"] = 9010;
    config.configJsonRoot["LogLevel"] = 1;
    config.configJsonRoot["LogfileName"] = "Chattering.log";
    config.configJsonRoot["LogfileSize"] = UINT32_MAX;
    config.configJsonRoot["LogfileCount"] = 5;
    defaultConfig << config.configJsonRoot;
    defaultConfig.close();
    spdlog::critical("\"config.json\" is missing. Default configuration has been written.");
  }
  try {
    if (configfile.is_open())
      configfile >> config.configJsonRoot;

    config.ipVersion = config.configJsonRoot["IP Version"].asInt();
    if (config.ipVersion != 4 && config.ipVersion != 6)
      throw std::runtime_error("Invalid IP Version.");

    config.listenPort = config.configJsonRoot["Listen Port"].asInt();
    if (config.listenPort < 0 || config.listenPort > 65535)
      throw std::runtime_error("Invalid listen port.");

    int ll_ = config.configJsonRoot["LogLevel"].asInt();
    if (ll_ >= 0 && ll_ < spdlog::level::n_levels)
      config.logLevel = (spdlog::level::level_enum)ll_;
    else
      throw std::runtime_error("Invalid log level.");

    config.logFileName = config.configJsonRoot["LogfileName"].asCString();
    config.logfileSize = config.configJsonRoot["LogfileSize"].asUInt();
    config.logfileCount = config.configJsonRoot["LogfileCount"].asUInt();
  }
  catch (Json::RuntimeError e) {
      spdlog::critical(std::string(std::string("[Json Error: ]") + e.what()).c_str());
      std::exit(EXIT_FAILURE);
  }
  return config;
}
}