# Copyright (C) 2012-2022 Zammad Foundation, https://zammad-foundation.org/

class Sequencer
  class Unit
    module Import
      module Kayako
        module Post
          module Channel
            class Mail < Sequencer::Unit::Import::Kayako::Post::Channel::Base
              def mapping
                super.merge(
                  to:           to,
                  cc:           cc,
                  body:         original_post['body_html'] || original_post['body_text'] || '',
                  content_type: 'text/html',
                )
              end

              private

              def article_type_name
                'email'
              end

              def identify_key
                'email'
              end

              def from
                return super if resource['is_requester'] || original_post['mailbox'].blank?

                original_post['mailbox']['address']
              end

              def to
                recipients = build_recipients('TO')

                # Add the mailbox address to the 'TO' field if it's a requester post.
                if resource['is_requester'] && original_post['mailbox'].present?
                  recipients = "#{original_post['mailbox']['address']}#{", #{recipients}" if recipients.present?}"
                end

                recipients
              end

              def cc
                build_recipients('CC')
              end

              def build_recipients(field_type)
                return if !original_post.key?('recipients') || original_post['recipients'].empty?

                original_post['recipients'].filter_map do |recipient|
                  next if recipient['type'] != field_type

                  recipient[identify_key]
                end.join(', ')
              end
            end
          end
        end
      end
    end
  end
end