$LOAD_PATH.unshift(File.expand_path(File.dirname(__FILE__))) unless $LOAD_PATH.include?(File.expand_path(File.dirname(__FILE__)))

require 'socialcastr/exceptions'
require 'socialcastr/base'
require 'socialcastr/api'
require 'socialcastr/like'
require 'socialcastr/comment'
require 'socialcastr/message'

require 'singleton'
require 'yaml'

module Socialcastr

  class MissingConfiguration < StandardError; end;

  class Configuration
    include Singleton
    ATTRIBUTES = [:domain, :username, :password, :format, :debug, :config_file]
    attr_accessor *ATTRIBUTES

    def ready?
      (ATTRIBUTES - [:config_file]).map { |a| self.send a }.map(&:nil?).none?
    end

    def format
      @format ||= 'xml'
    end

    def debug
      @debug ||= false
    end

    def reset
      ATTRIBUTES.each do |attribute|
        send(attribute.to_s + "=", nil)
      end
      @api = nil
      return self
    end
  end 

  class << self
    def configuration
      if block_given?
        yield Configuration.instance
        if Configuration.instance.config_file
          config = YAML::load_file(Configuration.instance.config_file)
          Configuration.instance.domain   = config['domain']
          Configuration.instance.username = config['username']
          Configuration.instance.password = config['password']
          Configuration.instance.format   = config['format']
          Configuration.instance.debug    = config['debug']
        end
      end
      Configuration.instance
    end

    def api
      config = Configuration.instance
      raise MissingConfiguration unless config.ready?
      @api ||= API.new(config.username, config.password, config.domain, config.format, config.debug)
    end

    def to_class_name(method)
      method.to_s.gsub(/^[a-z]|-[a-z]/i) { |a| a.sub("-", '').upcase }
    end

    def const_missing(class_name)
      Socialcastr.const_set(class_name, Class.new(Socialcastr::Base))
    end
  end
end