# Copyright 2015 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


require "time"
require "gcloud/resource_manager/errors"

module Gcloud
  module ResourceManager
    class Project
      ##
      # # Project Updater
      #
      # This object is used by Project#update when passed a block. These methods
      # are used to update the project data in a single API call.
      #
      # @example
      #   require "gcloud"
      #
      #   gcloud = Gcloud.new
      #   resource_manager = gcloud.resource_manager
      #   project = resource_manager.project "tokyo-rain-123"
      #   project.update do |p|
      #     p.name = "My Project"
      #     p.labels["env"] = "production"
      #   end
      #
      class Updater < DelegateClass(Project)
        ##
        # @private Create an Updater object.
        def initialize project
          super project
        end

        ##
        # Updates the user-assigned name of the project. This field is optional
        # and can remain unset.
        #
        # Allowed characters are: lowercase and uppercase letters, numbers,
        # hyphen, single-quote, double-quote, space, and exclamation point.
        #
        # @example
        #   require "gcloud"
        #
        #   gcloud = Gcloud.new
        #   resource_manager = gcloud.resource_manager
        #   project = resource_manager.project "tokyo-rain-123"
        #   project.update do |p|
        #     p.name = "My Project"
        #   end
        #
        def name= new_name
          gapi["name"] = new_name
        end

        ##
        # The labels associated with this project.
        #
        # Label keys must be between 1 and 63 characters long and must conform
        # to the following regular expression:
        # <code>[a-z]([-a-z0-9]*[a-z0-9])?</code>.
        #
        # Label values must be between 0 and 63 characters long and must conform
        # to the regular expression <code>([a-z]([-a-z0-9]*[a-z0-9])?)?</code>.
        #
        # No more than 256 labels can be associated with a given resource.
        # (`Hash`)
        #
        # @example
        #   require "gcloud"
        #
        #   gcloud = Gcloud.new
        #   resource_manager = gcloud.resource_manager
        #   project = resource_manager.project "tokyo-rain-123"
        #   project.update do |p|
        #     p.labels["env"] = "production"
        #   end
        #
        def labels
          gapi["labels"]
        end

        ##
        # Updates the labels associated with this project.
        #
        # Label keys must be between 1 and 63 characters long and must conform
        # to the following regular expression:
        # <code>[a-z]([-a-z0-9]*[a-z0-9])?</code>.
        #
        # Label values must be between 0 and 63 characters long and must conform
        # to the regular expression <code>([a-z]([-a-z0-9]*[a-z0-9])?)?</code>.
        #
        # No more than 256 labels can be associated with a given resource.
        # (`Hash`)
        #
        # @example
        #   require "gcloud"
        #
        #   gcloud = Gcloud.new
        #   resource_manager = gcloud.resource_manager
        #   project = resource_manager.project "tokyo-rain-123"
        #   project.update do |p|
        #     p.labels = { "env" => "production" }
        #   end
        #
        def labels= new_labels
          gapi["labels"] = new_labels
        end

        ##
        # @private Create an Updater object.
        def self.from_project project
          dupe_gapi = project.gapi.dup
          dupe_gapi = dupe_gapi.to_hash if dupe_gapi.respond_to? :to_hash
          if dupe_gapi["labels"].respond_to? :to_hash
            dupe_gapi["labels"] = dupe_gapi["labels"].to_hash
          end
          dupe_project = Project.from_gapi dupe_gapi, nil # no way to update
          Updater.new dupe_project
        end
      end
    end
  end
end