# frozen_string_literal: true

module Decidim
  module Votings
    module Admin
      # A command with all the business logic when updating an existing
      # voting in the system.
      class UpdateVoting < Decidim::Command
        include ::Decidim::AttachmentAttributesMethods

        # Public: Initializes the command.
        #
        # voting - the Voting to update
        # form - A form object with the params.
        def initialize(voting, form)
          @voting = voting
          @form = form
        end

        # Executes the command. Broadcasts these events:
        #
        # - :ok when everything is valid.
        # - :invalid if the form wasn't valid and we couldn't proceed.
        #
        # Returns nothing.
        def call
          return broadcast(:invalid) if form.invalid?

          update_voting!

          if voting.valid?
            broadcast(:ok, voting)
          else
            image_fields.each do |field|
              form.errors.add(field, voting.errors[field]) if voting.errors.include? field
            end
            broadcast(:invalid)
          end
        end

        private

        attr_reader :form, :voting

        def image_fields
          [:banner_image, :introductory_image]
        end

        def update_voting!
          voting.assign_attributes(attributes)
          return unless voting.valid?

          voting.save!

          Decidim.traceability.perform_action!(:update, voting, form.current_user) do
            voting
          end
        end

        def attributes
          {
            title: form.title,
            description: form.description,
            slug: form.slug,
            start_time: form.start_time,
            end_time: form.end_time,
            scope: form.scope,
            promoted: form.promoted,
            voting_type: form.voting_type,
            census_contact_information: form.census_contact_information,
            show_check_census: form.show_check_census
          }.merge(attachment_attributes(*image_fields))
        end
      end
    end
  end
end