require 'fog/brightbox'
require 'fog/compute'
require 'fog/brightbox/compute/shared'
require 'fog/brightbox/compute/image_selector'

module Fog
  module Compute
    class Brightbox < Fog::Service

      # Client credentials
      requires :brightbox_client_id, :brightbox_secret

      # API endpoint settings
      recognizes :brightbox_auth_url, :brightbox_api_url

      # User credentials (still requires client details)
      recognizes :brightbox_username, :brightbox_password, :brightbox_account

      # Cached tokens
      recognizes :brightbox_access_token, :brightbox_refresh_token

      # Automatic token management
      recognizes :brightbox_token_management

      # Excon connection settings
      recognizes :persistent

      model_path 'fog/brightbox/models/compute'
      collection  :accounts
      model       :account
      collection  :applications
      model       :application
      collection  :api_clients
      model       :api_client
      collection  :collaborations
      model       :collaboration
      collection  :servers
      model       :server
      collection  :server_groups
      model       :server_group
      collection  :firewall_policies
      model       :firewall_policy
      collection  :firewall_rules
      model       :firewall_rule
      collection  :flavors
      model       :flavor
      collection  :images
      model       :image
      collection  :load_balancers
      model       :load_balancer
      collection  :zones
      model       :zone
      collection  :cloud_ips
      model       :cloud_ip
      collection  :users
      model       :user
      collection  :user_collaborations
      model       :user_collaboration

      request_path 'fog/brightbox/requests/compute'
      request :accept_user_collaboration
      request :activate_console_server
      request :add_listeners_load_balancer
      request :add_nodes_load_balancer
      request :add_servers_server_group
      request :apply_to_firewall_policy
      request :accept_user_collaboration
      request :remove_firewall_policy
      request :create_api_client
      request :create_application
      request :create_cloud_ip
      request :create_collaboration
      request :create_firewall_policy
      request :create_firewall_rule
      request :create_image
      request :create_load_balancer
      request :create_server
      request :create_server_group
      request :delete_api_client
      request :delete_application
      request :delete_cloud_ip
      request :delete_collaboration
      request :delete_firewall_policy
      request :delete_firewall_rule
      request :delete_image
      request :delete_load_balancer
      request :delete_server
      request :delete_server_group
      request :delete_user_collaboration
      request :get_account
      request :get_api_client
      request :get_application
      request :get_authenticated_user
      request :get_cloud_ip
      request :get_collaboration
      request :get_firewall_policy
      request :get_firewall_rule
      request :get_image
      request :get_interface
      request :get_load_balancer
      request :get_scoped_account
      request :get_server
      request :get_server_group
      request :get_server_type
      request :get_user
      request :get_user_collaboration
      request :get_zone
      request :list_accounts
      request :list_api_clients
      request :list_applications
      request :list_cloud_ips
      request :list_collaborations
      request :list_firewall_policies
      request :list_images
      request :list_load_balancers
      request :list_server_groups
      request :list_server_types
      request :list_servers
      request :list_users
      request :list_user_collaborations
      request :list_zones
      request :map_cloud_ip
      request :move_servers_server_group
      request :reject_user_collaboration
      request :remove_listeners_load_balancer
      request :remove_nodes_load_balancer
      request :remove_servers_server_group
      request :resend_collaboration
      request :reset_ftp_password_account
      request :reset_ftp_password_scoped_account
      request :reset_secret_api_client
      request :reset_secret_application
      request :resend_collaboration
      request :reject_user_collaboration
      request :shutdown_server
      request :snapshot_server
      request :start_server
      request :stop_server
      request :unmap_cloud_ip
      request :update_account
      request :update_api_client
      request :update_application
      request :update_cloud_ip
      request :update_firewall_policy
      request :update_firewall_rule
      request :update_image
      request :update_load_balancer
      request :update_scoped_account
      request :update_server
      request :update_server_group
      request :update_user

      # The Mock Service allows you to run a fake instance of the Service
      # which makes no real connections.
      #
      # @todo Implement
      #
      class Mock
        include Fog::Brightbox::Compute::Shared

        def request(method, path, expected_responses, parameters = {})
          _request
        end

        def request_access_token(connection, credentials)
          _request
        end

      private

        def _request
          raise Fog::Errors::MockNotImplemented
        end

        def select_default_image
          "img-mockd"
        end
      end

      # The Real Service actually makes real connections to the Brightbox
      # service.
      #
      class Real
        include Fog::Brightbox::Compute::Shared

        # Makes an API request to the given path using passed options or those
        # set with the service setup
        #
        # @todo Standard Fog behaviour is to return the Excon::Response but
        #   this was unintentionally changed to be the Hash version of the
        #   data in the body. This loses access to some details and should
        #   be corrected in a backwards compatible manner
        #
        # @overload request(params)
        #   @param [Hash] params Excon compatible options
        #   @option params [String] :body text to be sent over a socket
        #   @option params [Hash<Symbol, String>] :headers The default headers to supply in a request
        #   @option params [String] :host The destination host's reachable DNS name or IP, in the form of a String
        #   @option params [String] :path appears after 'scheme://host:port/'
        #   @option params [Fixnum] :port The port on which to connect, to the destination host
        #   @option params [Hash]   :query appended to the 'scheme://host:port/path/' in the form of '?key=value'
        #   @option params [String] :scheme The protocol; 'https' causes OpenSSL to be used
        #   @return [Excon::Response]
        #   @see https://github.com/geemus/excon/blob/master/lib/excon/connection.rb
        #
        # @overload request(method, path, expected_responses, params = {})
        #   @param [String] method HTTP method to use for the request
        #   @param [String] path   The absolute path for the request
        #   @param [Array<Fixnum>] expected_responses HTTP response codes that have been successful
        #   @param [Hash] params Keys and values for JSON
        #   @option params [String] :account_id The scoping account if required
        #   @deprecated #request with multiple arguments is deprecated
        #     since it is inconsistent with original fog version.
        #   @return [Hash]
        def request(*args)
          if args.size == 1
            authenticated_request(*args)
          else
            Fog::Logger.deprecation("#request with multiple parameters is deprecated, use #wrapped_request instead [light_black](#{caller.first})[/]")
            wrapped_request(*args)
          end
        end

        # Makes a request but with seperated arguments and parses the response to a hash
        #
        # @note #wrapped_request is the non-standard form of request introduced by mistake
        #
        # @param [String] method HTTP method to use for the request
        # @param [String] path   The absolute path for the request
        # @param [Array<Fixnum>] expected_responses HTTP response codes that have been successful
        # @param [Hash]  parameters Keys and values for JSON
        # @option parameters [String] :account_id The scoping account if required
        #
        # @return [Hash]
        def wrapped_request(method, path, expected_responses, parameters = {})
          _wrapped_request(method, path, expected_responses, parameters)
        end

      private

        # Wrapped request is the non-standard form of request introduced by mistake
        #
        # @param [String] method HTTP method to use for the request
        # @param [String] path   The absolute path for the request
        # @param [Array<Fixnum>] expected_responses HTTP response codes that have been successful
        # @param [Hash]  parameters Keys and values for JSON
        # @option parameters [String] :account_id The scoping account if required
        #
        # @return [Hash]
        def _wrapped_request(method, path, expected_responses, parameters = {})
          request_options = {
            :method   => method.to_s.upcase,
            :path     => path,
            :expects  => expected_responses
          }

          # Select the account to scope for this request
          account = scoped_account(parameters.fetch(:account_id, nil))
          if account
            request_options[:query] = { :account_id => account }
          end

          request_options[:body] = Fog::JSON.encode(parameters) unless parameters.empty?

          response = make_request(request_options)

          # FIXME We should revert to returning the Excon::Request after a suitable
          # configuration option is in place to switch back to this incorrect behaviour
          unless response.body.empty?
            Fog::JSON.decode(response.body)
          else
            response
          end
        end

        # Queries the API and tries to select the most suitable official Image
        # to use if the user chooses not to select their own.
        #
        # @return [String] if image is found, the image's identifier
        # @return [NilClass] if no image found or an error occured
        #
        def select_default_image
          Fog::Brightbox::Compute::ImageSelector.new(list_images).latest_ubuntu
        end
      end

    end
  end
end