# frozen_string_literal: true

require 'json'
require 'singleton'

module ProtoConfig
  class ConfigManager
    include Singleton

    attr_reader :recently_connected_time, :listen_ip, :listen_port, :db_type, :db_params, :db_username, :db_password

    def initialize
      # Initialize with default settings
      @recently_connected_time = 120 # default value
      @listen_ip = '0.0.0.0' # default value
      @listen_port = 3080 # default value
      @db_type = 'sqlite'
      @db_params = { username: nil, password: nil } # default value

      # Check if the config file exists in the current working directory
      config_path = 'config.json'
      create_default_config(config_path) unless File.exist?(config_path)

      load_config(config_path)
    end

    def create_default_config(config_path)
      default_config = {
        'recently_connected_time' => @recently_connected_time,
        'listen_ip' => @listen_ip,
        'listen_port' => @listen_port,
        'db_type' => @db_type,
        'db_params' => @db_params,
        'db_username' => @db_username,
        'db_password' => @db_password
      }
      File.write(config_path, JSON.pretty_generate(default_config))
    end

    def load_config(config_path)
      # Load configuration from a JSON file
      config_data = JSON.parse(File.read(config_path))

      @recently_connected_time = config_data['recently_connected_time'] if config_data['recently_connected_time']
      @listen_ip = config_data['listen_ip'] if config_data['listen_ip']
      @listen_port = config_data['listen_port'] if config_data['listen_port']
      @db_type = config_data['db_type'] if config_data['db_type']
      @db_params = config_data['db_params'] if config_data['db_params']
    rescue StandardError => e
      puts "Failed to load configuration: #{e.message}"
    end
  end
end