module Trinidad
  require 'optparse'
  require 'yaml'

  class CommandLineParser
    attr_reader :default_options

    def self.parse(argv)
      CommandLineParser.new.parse!(argv)
    end

    def initialize
      @default_options = {
        :port => 3000,
        :environment => 'development',
        :context_path => '/',
        :libs_dir => 'lib',
        :classes_dir => 'classes',
        :ssl_port => 8443,
        :ajp_port => 8009
      }
    end

    def parse!(argv)
      begin
        options_parser.parse!(argv)
      rescue OptionParser::InvalidOption => e
        p e, options_parser
        exit(1)
      end

      if default_options.has_key?(:config)
        config_options = YAML.load_file(default_options[:config])
        default_options.deep_merge!(config_options.symbolize!)
      end

      default_options
    end

    def options_parser
      @parser ||= OptionParser.new do |opts|
        opts.banner = 'Trinidad server default options:'
        opts.separator ''

        opts.on('-d', '--dir WEB_APP_DIRECTORY', 'Web app directory path',
            "default: #{Dir.pwd}") do |v|
          default_options[:web_app_dir] = v
        end

        opts.on('-e', '--env ENVIRONMENT', 'Rails environment', 
            "default: #{default_options[:environment]}") do |v| 
          default_options[:environment] = v
        end

        opts.on('-p', '--port PORT', 'Port to bind to', 
            "default: #{default_options[:port]}") do |v| 
          default_options[:port] = v
        end

        opts.on('-c', '--context CONTEXT_PATH', 'The application context path', 
            "default: #{default_options[:context_path]}") do |v| 
          default_options[:context_path] = v
        end

        opts.on('--lib', '--jars LIBS_DIR', 'Directory containing jars used by the application', 
            "default: #{default_options[:libs_dir]}") do |v| 
          default_options[:libs_dir] = v
        end

        opts.on('--classes', '--classes CLASSES_DIR', 'Directory containing classes used by the application', 
            "default: #{default_options[:classes_dir]}") do |v| 
          default_options[:classes_dir] = v
        end

        opts.on('-s', '--ssl [SSL_PORT]', 'Enable secure socket layout',
            "default port: #{default_options[:ssl_port]}") do |v|
          ssl_port = v.nil? ? default_options.delete(:ssl_port) : v.to_i
          default_options[:ssl] = {:port => ssl_port}
        end

        opts.on('-a', '--ajp [AJP_PORT]', 'Enable ajp connections',
            "default port: #{default_options[:ajp_port]}") do |v|
          ajp_port = v.nil? ? default_options.delete(:ajp_port) : v.to_i
          default_options[:ajp] = {:port => ajp_port} 
        end

        opts.on('-f', '--config [CONFIG_FILE]', 'Configuration file',
            "default: #{default_options[:config]}") do |file|
          default_options[:config] = 'config/trinidad.yml'

          if file
            default_options[:config] = file
          elsif File.exist?('config/tomcat.yml') && !File.exist?(default_options[:config])
            puts "[WARNING] Default configuration file name has been moved to trinidad.yml, tomcat.yml will not be supported in future versions."
            puts "\tYou still can use tomcat.yml passing it as the file name to this option: -f config/tomcat.yml"
            default_options[:config] = 'config/tomcat.yml'
          end
        end

        opts.on('-r', '--rackup [RACKUP_FILE]', 'Rackup configuration file',
            'default: config.ru') do |v|
          default_options[:rackup] = v || 'config.ru'
        end

        opts.on('--public', '--public DIRECTORY', 'Public directory', 'default: public') do |v|
          default_options[:public] = v
        end

        opts.on('-t', '--threadsafe', 'Threadsafe mode') do
          default_options[:jruby_min_runtimes] = 1
          default_options[:jruby_max_runtimes] = 1
        end

        opts.on('-v', '--version', 'display the current version') do
          puts "trinidad #{Trinidad::VERSION} (tomcat #{Trinidad::TOMCAT_VERSION})"
          exit
        end

        opts.on('-l', '--load EXTENSION_NAME', 'load options for a given extension') do |name|
          Trinidad::Extensions.configure_options_extensions({name => {}}, opts, default_options)
        end

        opts.on('-h', '--help', 'display the help') do
          puts opts
          exit
        end
      end
    end
  end
end