require 'logger'
require 'pathname'
require 'open3'
require 'engineyard-serverside/shell/formatter'
require 'engineyard-serverside/shell/yieldio'

module EY
  module Serverside
    class Shell
      attr_reader :logger

      def initialize(options)
        @start_time = options[:start_time]
        @verbose    = options[:verbose]


        @stdout = options[:stdout] || $stdout
        @stderr = options[:stderr] || $stderr

        log_pathname = Pathname.new(options[:log_path])
        log_pathname.unlink if log_pathname.exist? # start fresh
        @logger = Logger.new(log_pathname.to_s)
        @logger.level = Logger::DEBUG # Always log to the file at debug, formatter hides debug for non-verbose
        @logger.formatter = EY::Serverside::Shell::Formatter.new(@stdout, @stderr, start_time, @verbose)
      end

      def verbose?
        @verbose
      end

      def start_time
        @start_time ||= Time.now
      end

      # a nice info outputter that prepends spermy operators for some reason.
      def status(msg)
        if msg.respond_to?(:force_encoding)
          msg.force_encoding("UTF-8")
        end
        info msg.gsub(/^/, '~> ')
      end

      def substatus(msg)
        debug msg.gsub(/^/, ' ~ ')
      end

      def fatal(msg)   logger.fatal   "FATAL: #{msg}"   end
      def error(msg)   logger.error   "ERROR: #{msg}"   end
      def warning(msg) logger.warn    "WARNING: #{msg}" end
      def notice(msg)  logger.warn    msg end
      def info(msg)    logger.info    msg end
      def debug(msg)   logger.debug   msg end
      def unknown(msg) logger.unknown msg end

      def exception(msg) error msg end
      # a debug outputter that displays a command being run
      # Formatis like this:
      #   $ cmd blah do \
      #   > something more
      #   > end
      def command_show(cmd) debug   cmd.gsub(/^/,'   > ').sub(/>/, '$') end
      def command_out(msg)  debug   msg.gsub(/^/,'     ') end
      def command_err(msg)  unknown msg.gsub(/^/,'     ') end

      def logged_system(cmd, server = nil)
        EY::Serverside::Spawner.run(cmd, self, server)
      end

    end
  end
end