module L4dServer
  class ConfigGenerator
    def self.generate(server)
      new(server).generate
    end

    def initialize(server)
      @server = server
      @template = server.server_template
    end

    def generate
      config_path = config_file_path
      config_dir = File.dirname(config_path)

      FileUtils.mkdir_p(config_dir) unless Dir.exist?(config_dir)

      File.write(config_path, render_config)
      config_path
    end

    def config_file_path
      "/opt/l4d2/servers/#{@server.id}/server.cfg"
    end

    private

    def render_config
      lines = []

      @template.config_options.each do |option|
        lines << "#{option.config_key} \"#{option.config_value}\""
      end

      lines.join("\n")
    end
  end
end