require 'public_suffix'

module RestPack
  module Web
    class Context
      attr_accessor :domain, :application, :channel, :configurations, :services, :user, :user_id, :request
      
      def initialize(env)    
        restpack = env[:restpack]

        if restpack
          @request = restpack[:request]
          @domain = restpack[:domain]
          @application = restpack[:application]
          @channel = restpack[:channel]
          @configurations = restpack[:configurations]
          @services = restpack[:services]
          @user = restpack[:user]
          @user_id = @user[:id] if @user
        end
      end

      def is_authenticated?
        !@user.nil?
      end
      
      def get_service(name)
        @services.find { |s| s[:name] == name.to_s }
      end

      def home_domain
        @application.home_domain || "www.#{root_domain}"
      end

      def auth_domain
        @application.auth_domain || "auth.#{root_domain}"
      end

      def root_domain
        PublicSuffix.parse(@domain.host).domain
      end

      def logout_url(next_url = nil) #TODO: GJ: whitelist the next_url
        next_url ||= "http://#{home_domain}/"
        "http://#{auth_domain}/auth/logout?next=#{next_url}"
      end

      def login_url(provider = :twitter, next_url = nil)
        next_url ||= "http://#{home_domain}/"
        "http://#{auth_domain}/auth/#{provider}?next=#{next_url}"
      end
      
      def debug_info
        user_debug_info = ""
        if is_authenticated?
          user_debug_info = %{
 * **name** : #{@user['name']}
 * **nickname** : #{@user['nickname']}
 * **location** : #{@user['location']}
 * **description** : #{@user['description']}
 * **image** : #{@user['image_url']}
          }
        end
        
        %{
### RestPack Context:

#### User:

 * **is authenticated**: #{is_authenticated?}
#{user_debug_info}

#### Channel:

 * **id**: #{@channel.id}
 * **name**: #{@channel.name}
 * **applications**: #{@channel.applications.map { |a| a.name }}.join(', ')

#### Application:

 * **id**: #{@application.id}
 * **name**: #{@application.name}
 * **domains**: #{@application.domains.map { |a| a.host }}.join(', ')

#### Domain:

 * **id**: #{@domain.id}
 * **host**: #{@domain.host}

#### Configuration:

 * **keys**: #{@configurations.map { |c| c.key }}.join(', ')


#### Authentication:

 * **logout**: #{logout_url}
 * **twitter oauth**: #{login_url(:twitter)}
 * **google oauth**: #{login_url(:google_oauth2)}
          }
      end
    end
  end
end