require "logger"
module Boty
  module Logger
    attr_writer :logger

    def self.adapter=(adapter)
      @adapter = adapter
    end

    def self.adapter
      @adapter ||= ::Logger.new(STDOUT).tap { |logger|
        logger.level = ::Logger::DEBUG
      }
    end

    def logger
      Logger.adapter
    end

    def log_error(error, message)
      logger.error do
        "#{message}\n#{error.message}"
      end

      logger.debug do
        error.backtrace.reduce("") { |a, e| a << "#{e}\n" }
      end
    end

    class Multi < ::Logger
      def initialize(adapters)
        @adapters = adapters
      end

      def level=(level)
        @adapters.each do |adapter|
          adapter.level = level
        end
      end

      def add(*args, &block)
        @adapters.each do |adapter|
          adapter.add(*args, &block)
        end
      end
    end

    class Memory < ::Logger
      attr_reader :logs

      def initialize(*)
        @logs = []
      end

      def add(*args, &block)
        @logs << if block_given?
                   block.call
                 else
                   args[2]
                 end
      end
    end

    class Null < ::Logger
      def initialize(*); end

      def add(*, &block); end
    end
  end
end