#include "include/config_manager.h"

ConfigManager::ConfigManager()
{
  config = new QSettings("config.ini", QSettings::IniFormat);
}

// Validate and set up the config
bool ConfigManager::initConfig()
{
  config->beginGroup("Info");
  QString config_version = config->value("version", "none").toString();
  config->endGroup();
  if (config_version == "none") {
    QFileInfo check_file("config.ini");
    // TODO: put proper translatable warnings here
    if (!(check_file.exists() && check_file.isFile())) {
      // TODO: send signal config doesn't exist
      generateDefaultConfig(false);
    }
    else {
      // TODO: send signal config is invalid
      generateDefaultConfig(true);
    }
    return false;
  }
  else if (config_version != QString::number(CONFIG_VERSION)) {
    bool version_number_is_valid;
    int current_version = config_version.toInt(&version_number_is_valid);
    if (version_number_is_valid)
      updateConfig(current_version);
    else
      generateDefaultConfig(true); // Version number isn't a number at all
                                   // This means the config is invalid
                                   // TODO: send invalid config signal
    return false;
  }
  else {
    // Config is valid and up to date, so let's go ahead
    return true;
  }
}

// Setting backup_old to true will move the existing config.ini to
// config_old.ini
void ConfigManager::generateDefaultConfig(bool backup_old)
{
  qDebug() << "Config is invalid or missing, making a new one...";
  QDir dir = QDir::current();
  if (backup_old) {
    // TODO: failsafe if config_old.ini already exists
    dir.rename("config.ini", "config_old.ini");
  }

  // Group: Info
  // This contains basic metadata about the config
  config->beginGroup("Info");
  config->setValue("version", CONFIG_VERSION);
  config->endGroup();

  // Group: Options
  // This contains general configuration
  config->beginGroup("Options");
  config->setValue("language", "en");
  config->setValue("hostname", "$H");
  config->setValue("max_players", "100");
  config->setValue("port", "27016");
  config->setValue("webao_enable", "true");
  config->setValue("webao_port", "27017");
  config->setValue("modpass", "password");
  config->setValue("advertise", "true");
  config->setValue("ms_ip", "master.aceattorneyonline.com");
  config->setValue("ms_port", "27016");
  config->setValue("server_name", "My First Server");
  config->setValue("server_description", "This is my flashy new server");
  config->setValue("multiclient_limit", "16");
  config->setValue("max_message_size", "256");
  config->endGroup();
}

// Ensure version continuity with config versions
void ConfigManager::updateConfig(int current_version)
{
  if (current_version > CONFIG_VERSION) {
    // Config version is newer than the latest version, and the config is
    // invalid This could also mean the server is out of date, and the user
    // should be shown a relevant message Regardless, regen the config anyways
    // TODO: send signal config is invalid
    generateDefaultConfig(true);
  }
  else if (current_version < 0) {
    // Negative version number? Invalid!
    generateDefaultConfig(true);
  }
  else {
    // TODO: send signal config is out of date, and is being updated
    // Update the config as needed using a switch. This is nice because we can
    // fall through as we go up the version ladder.
    switch (current_version) {
    case 0: // Version 0 doesn't actually exist, but we should check for it just
            // in case
    case 1:
      config->beginGroup("Info");
      config->setValue("version", CONFIG_VERSION);
      config->endGroup();
      break; // This is the newest version, and nothing more needs to be done
    }
  }
}

// Validate and retriever settings related to advertising and the server
bool ConfigManager::loadServerSettings(server_settings *settings)
{
  bool port_conversion_success;
  bool ws_port_conversion_success;
  bool local_port_conversion_success;
  config->beginGroup("Options");
  settings->ms_ip =
      config->value("ms_ip", "master.aceattorneyonline.com").toString();
  settings->port =
      config->value("ms_port", "27016").toInt(&port_conversion_success);
  settings->ws_port =
      config->value("webao_port", "27017").toInt(&ws_port_conversion_success);
  settings->local_port =
      config->value("port", "27016").toInt(&local_port_conversion_success);
  settings->name = config->value("server_name", "My First Server").toString();
  settings->description =
      config->value("server_description", "This is my flashy new server")
          .toString();
  config->endGroup();
  if (!port_conversion_success || !ws_port_conversion_success ||
      !local_port_conversion_success) {
    return false;
  }
  else {
    if (config->value("advertise", "true").toString() != "true")
      settings->advertise_server = false;
    else
      settings->advertise_server = true;

    if (config->value("webao_enable", "true").toString() != "true")
      settings->ws_port = -1;

    return true;
  }
}