#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2023 Ben Tey
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
# Copyright (C) 2012-2021 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
# See docs/COPYRIGHT.rdoc for more details.
#++

module OpenProject::GitlabIntegration
  module NotificationHandler
    ##
    # Handles Gitlab issue notifications.
    class IssueHook
      include OpenProject::GitlabIntegration::NotificationHandler::Helper
      
      def process(payload_params)
        @payload = wrap_payload(payload_params)
        user = User.find_by_id(payload.open_project_user_id)
        text = payload.object_attributes.title + ' - ' + payload.object_attributes.description
        work_packages = find_mentioned_work_packages(text, user)
        notes = generate_notes(payload)
        comment_on_referenced_work_packages(work_packages, user, notes)
        upsert_issue(work_packages)
      end

      private

      attr_reader :payload

      def generate_notes(payload)
        accepted_actions = %w[open reopen close]

        key_action = {
          'open' => 'opened',
          'reopen' => 'reopened',
          'close' => 'closed'
        }[payload.object_attributes.action]

        return nil unless accepted_actions.include? payload.object_attributes.action
        I18n.t("gitlab_integration.issue_#{key_action}_referenced_comment",
          :issue_number => payload.object_attributes.iid,
          :issue_title => payload.object_attributes.title,
          :issue_url => payload.object_attributes.url,
          :repository => payload.repository.name,
          :repository_url => payload.repository.homepage,
          :gitlab_user => payload.user.name,
          :gitlab_user_url => payload.user.avatar_url)
      end

      def gitlab_issue
        @gitlab_issue ||= GitlabIssue
                            .where(gitlab_id: payload.object_attributes.iid)
                            .or(GitlabIssue.where(gitlab_html_url: payload.object_attributes.url))
                            .take
      end

      def upsert_issue(work_packages)
        return if work_packages.empty? && gitlab_issue.nil?
        OpenProject::GitlabIntegration::Services::UpsertIssue.new.call(payload,
                                                                             work_packages: work_packages)
      end
    end
  end
end