require "providers/provider_factory"
require "commands/image"

module Devops
  module Version2_0
    module Handler
      class Image

        extend ImageCommands

        def self.get_images
          lambda {
            check_privileges("image", "r")
            check_provider(params[:provider]) if params[:provider]
            images = settings.mongo.images(params[:provider])
            json(images.map {|i| i.to_hash})
          }
        end

        def self.get_provider_images
          lambda {
            check_privileges("image", "r")
            check_provider(params[:provider])
            json Image.get_available_provider_images(settings.mongo, params[:provider])
          }
        end

        def self.get_image
          lambda {
            check_privileges("image", "r")
            json settings.mongo.image(params[:image_id])
          }
        end

        def self.create_image
          lambda {
            check_privileges("image", "w")
            image = create_object_from_json_body
            settings.mongo.image_insert ::Image.new(image)
            create_response "Created", nil, 201
          }
        end

        def self.update_image
          lambda {
            check_privileges("image", "w")
            settings.mongo.image params[:image_id]
            image = ::Image.new(create_object_from_json_body)
            image.id = params[:image_id]
            settings.mongo.image_update image
            create_response("Image '#{params[:image_id]}' has been updated")
          }
        end

        def self.delete_image
          lambda {
            check_privileges("image", "w")
            projects = settings.mongo.projects_by_image params[:image_id]
            unless projects.empty?
              ar = []
              projects.each do |p|
                ar += p.deploy_envs.select{|e| e.respond_to?(:image)}.select{|e| e.image == params[:image_id]}.map{|e| "#{p.id}.#{e.identifier}"}
              end
              raise DependencyError.new "Deleting is forbidden: Image is used in #{ar.join(", ")}"
            end

            r = settings.mongo.image_delete params[:image_id]
            create_response("Image '#{params[:image_id]}' has been removed")
          }
        end
      end
    end
  end
end