# frozen_string_literal: true

class ConfluenceService < Service
  include ActionView::Helpers::UrlHelper

  VALID_SCHEME_MATCH = %r{\Ahttps?\Z}.freeze
  VALID_HOST_MATCH = %r{\A.+\.atlassian\.net\Z}.freeze
  VALID_PATH_MATCH = %r{\A/wiki(/|\Z)}.freeze

  prop_accessor :confluence_url

  validates :confluence_url, presence: true, if: :activated?
  validate :validate_confluence_url_is_cloud, if: :activated?

  after_commit :cache_project_has_confluence

  def self.to_param
    'confluence'
  end

  def self.supported_events
    %w()
  end

  def title
    s_('ConfluenceService|Confluence Workspace')
  end

  def description
    s_('ConfluenceService|Connect a Confluence Cloud Workspace to GitLab')
  end

  def help
    return unless project&.wiki_enabled?

    if activated?
      wiki_url = project.wiki.web_url

      s_(
        'ConfluenceService|Your GitLab Wiki can be accessed here: %{wiki_link}. To re-enable your GitLab Wiki, disable this integration' %
        { wiki_link: link_to(wiki_url, wiki_url) }
      ).html_safe
    else
      s_('ConfluenceService|Enabling the Confluence Workspace will disable the default GitLab Wiki. Your GitLab Wiki data will be saved and you can always re-enable it later by turning off this integration').html_safe
    end
  end

  def fields
    [
      {
        type: 'text',
        name: 'confluence_url',
        title: 'Confluence Cloud Workspace URL',
        placeholder: s_('ConfluenceService|The URL of the Confluence Workspace'),
        required: true
      }
    ]
  end

  def can_test?
    false
  end

  private

  def validate_confluence_url_is_cloud
    unless confluence_uri_valid?
      errors.add(:confluence_url, 'URL must be to a Confluence Cloud Workspace hosted on atlassian.net')
    end
  end

  def confluence_uri_valid?
    return false unless confluence_url

    uri = URI.parse(confluence_url)

    (uri.scheme&.match(VALID_SCHEME_MATCH) &&
      uri.host&.match(VALID_HOST_MATCH) &&
      uri.path&.match(VALID_PATH_MATCH)).present?

  rescue URI::InvalidURIError
    false
  end

  def cache_project_has_confluence
    return unless project && !project.destroyed?

    project.project_setting.save! unless project.project_setting.persisted?
    project.project_setting.update_column(:has_confluence, active?)
  end
end