require 'fog/aws'

module Fog
  module AWS
    class Glacier < Fog::Service
      extend Fog::AWS::CredentialFetcher::ServiceMethods
      
      requires :aws_access_key_id, :aws_secret_access_key
      recognizes :region, :host, :path, :port, :scheme, :persistent, :use_iam_profile, :aws_session_token, :aws_credentials_expire_at

      request_path 'fog/aws/requests/glacier'

      request :create_vault
      request :delete_vault
      request :delete_vault_notification_configuration
      request :describe_vault
      request :get_vault_notification_configuration
      request :list_vaults
      request :set_vault_notification_configuration

      class Mock

        def initialize(options={})
          Fog::Mock.not_implemented
        end

      end

      class Real
        include Fog::AWS::CredentialFetcher::ConnectionMethods
        # Initialize connection to Glacier
        #
        # ==== Notes
        # options parameter must include values for :aws_access_key_id and
        # :aws_secret_access_key in order to create a connection
        #
        # ==== Examples
        #   ses = SES.new(
        #    :aws_access_key_id => your_aws_access_key_id,
        #    :aws_secret_access_key => your_aws_secret_access_key
        #   )
        #
        # ==== Parameters
        # * options<~Hash> - config arguments for connection.  Defaults to {}.
        #   * region<~String> - optional region to use. For instance, 'us-east-1' and etc.
        #
        # ==== Returns
        # * Glacier object with connection to AWS.
        def initialize(options={})

          @use_iam_profile = options[:use_iam_profile]
          @region = options[:region] || 'us-east-1'

          setup_credentials(options)

          @connection_options     = options[:connection_options] || {}
          @host = options[:host] || "glacier.#{@region}.amazonaws.com"
          @version = '2012-06-01'
          @path       = options[:path]        || '/'
          @persistent = options[:persistent]  || false
          @port       = options[:port]        || 443
          @scheme     = options[:scheme]      || 'https'

          @connection = Fog::Connection.new("#{@scheme}://#{@host}:#{@port}#{@path}", @persistent, @connection_options)
        end


        private
        def setup_credentials(options)
          @aws_access_key_id      = options[:aws_access_key_id]
          @aws_secret_access_key  = options[:aws_secret_access_key]
          @aws_session_token      = options[:aws_session_token]
          @aws_credentials_expire_at = options[:aws_credentials_expire_at]

          @signer = Fog::AWS::SignatureV4.new( @aws_access_key_id, @aws_secret_access_key,@region,'glacier')
        end

        def request(params, &block)
          refresh_credentials_if_expired

          date = Fog::Time.now
          params[:headers]['Date'] = date.to_date_header
          params[:headers]['x-amz-date'] = date.to_iso8601_basic

          params[:headers]['Host'] = @host
          params[:headers]['x-amz-glacier-version'] = @version
          params[:headers]['x-amz-security-token'] = @aws_session_token if @aws_session_token
          params[:headers]['Authorization'] = @signer.sign params, date

          response = @connection.request(params, &block)
          if response.headers['Content-Type'] == 'application/json'
            response.body  = Fog::JSON.decode(response.body)
          end
          response
        end
      end
    end
  end
end