# frozen_string_literal: true

module Integrations
  class IssueTracker < Integration
    validate :one_issue_tracker, if: :activated?, on: :manual_change

    # TODO: we can probably just delegate as part of
    # https://gitlab.com/gitlab-org/gitlab/issues/29404
    data_field :project_url, :issues_url, :new_issue_url

    default_value_for :category, 'issue_tracker'

    before_validation :handle_properties
    before_validation :set_default_data, on: :create

    # Pattern used to extract links from comments
    # Override this method on services that uses different patterns
    # This pattern does not support cross-project references
    # The other code assumes that this pattern is a superset of all
    # overridden patterns. See ReferenceRegexes.external_pattern
    def self.reference_pattern(only_long: false)
      if only_long
        /(\b[A-Z][A-Z0-9_]*-)#{Gitlab::Regex.issue}/
      else
        /(\b[A-Z][A-Z0-9_]*-|#{Issue.reference_prefix})#{Gitlab::Regex.issue}/
      end
    end

    def handle_properties
      # this has been moved from initialize_properties and should be improved
      # as part of https://gitlab.com/gitlab-org/gitlab/issues/29404
      return unless properties

      @legacy_properties_data = properties.dup
      data_values = properties.slice!('title', 'description')
      data_values.reject! { |key| data_fields.changed.include?(key) }
      data_values.slice!(*data_fields.attributes.keys)
      data_fields.assign_attributes(data_values) if data_values.present?

      self.properties = {}
    end

    def legacy_properties_data
      @legacy_properties_data ||= {}
    end

    def supports_data_fields?
      true
    end

    def data_fields
      issue_tracker_data || self.build_issue_tracker_data
    end

    def default?
      default
    end

    def issue_url(iid)
      issues_url.gsub(':id', iid.to_s)
    end

    def issue_tracker_path
      project_url
    end

    def new_issue_path
      new_issue_url
    end

    def issue_path(iid)
      issue_url(iid)
    end

    def fields
      [
        { type: 'text', name: 'project_url', title: _('Project URL'), help: s_('IssueTracker|The URL to the project in the external issue tracker.'), required: true },
        { type: 'text', name: 'issues_url', title: s_('IssueTracker|Issue URL'), help: s_('IssueTracker|The URL to view an issue in the external issue tracker. Must contain %{colon_id}.') % { colon_id: '<code>:id</code>'.html_safe }, required: true },
        { type: 'text', name: 'new_issue_url', title: s_('IssueTracker|New issue URL'), help: s_('IssueTracker|The URL to create an issue in the external issue tracker.'), required: true }
      ]
    end

    def initialize_properties
      {}
    end

    # Initialize with default properties values
    def set_default_data
      return unless issues_tracker.present?

      # we don't want to override if we have set something
      return if project_url || issues_url || new_issue_url

      data_fields.project_url = issues_tracker['project_url']
      data_fields.issues_url = issues_tracker['issues_url']
      data_fields.new_issue_url = issues_tracker['new_issue_url']
    end

    def self.supported_events
      %w(push)
    end

    def execute(data)
      return unless supported_events.include?(data[:object_kind])

      message = "#{self.type} was unable to reach #{self.project_url}. Check the url and try again."
      result = false

      begin
        response = Gitlab::HTTP.head(self.project_url, verify: true)

        if response
          message = "#{self.type} received response #{response.code} when attempting to connect to #{self.project_url}"
          result = true
        end
      rescue Gitlab::HTTP::Error, Timeout::Error, SocketError, Errno::ECONNRESET, Errno::ECONNREFUSED, OpenSSL::SSL::SSLError => error
        message = "#{self.type} had an error when trying to connect to #{self.project_url}: #{error.message}"
      end
      log_info(message)
      result
    end

    def support_close_issue?
      false
    end

    def support_cross_reference?
      false
    end

    private

    def enabled_in_gitlab_config
      Gitlab.config.issues_tracker &&
        Gitlab.config.issues_tracker.values.any? &&
        issues_tracker
    end

    def issues_tracker
      Gitlab.config.issues_tracker[to_param]
    end

    def one_issue_tracker
      return if template? || instance?
      return if project.blank?

      if project.integrations.external_issue_trackers.where.not(id: id).any?
        errors.add(:base, _('Another issue tracker is already in use. Only one issue tracker service can be active at a time'))
      end
    end
  end
end

Integrations::IssueTracker.prepend_mod_with('Integrations::IssueTracker')