# frozen_string_literal: true

module Integrations
  class EmailsOnPush < Integration
    include NotificationBranchSelection

    RECIPIENTS_LIMIT = 750

    validates :recipients, presence: true, if: :validate_recipients?
    validate :number_of_recipients_within_limit, if: :validate_recipients?

    field :send_from_committer_email,
      type: 'checkbox',
      title: -> { s_("EmailsOnPushService|Send from committer") },
      help: -> do
        @help ||= begin
          domains = Notify.allowed_email_domains.map { |domain| "user@#{domain}" }.join(", ")

          s_("EmailsOnPushService|Send notifications from the committer's email address if the domain matches the domain used by your GitLab instance (such as %{domains}).") % { domains: domains }
        end
      end

    field :disable_diffs,
      type: 'checkbox',
      title: -> { s_("EmailsOnPushService|Disable code diffs") },
      help: -> { s_("EmailsOnPushService|Don't include possibly sensitive code diffs in notification body.") }

    field :branches_to_be_notified,
      type: 'select',
      title: -> { s_('Integrations|Branches for which notifications are to be sent') },
      choices: branch_choices

    field :recipients,
      type: 'textarea',
      placeholder: -> { s_('EmailsOnPushService|tanuki@example.com gitlab@example.com') },
      help: -> { s_('EmailsOnPushService|Emails separated by whitespace.') }

    def self.valid_recipients(recipients)
      recipients.split.grep(Devise.email_regexp).uniq(&:downcase)
    end

    def title
      s_('EmailsOnPushService|Emails on push')
    end

    def description
      s_('EmailsOnPushService|Email the commits and diff of each push to a list of recipients.')
    end

    def self.to_param
      'emails_on_push'
    end

    def self.supported_events
      %w(push tag_push)
    end

    def initialize_properties
      super

      self.branches_to_be_notified = 'all' if branches_to_be_notified.nil?
    end

    def execute(push_data)
      return unless supported_events.include?(push_data[:object_kind])
      return if project.emails_disabled?
      return unless notify_for_ref?(push_data)

      EmailsOnPushWorker.perform_async(
        project_id,
        recipients,
        push_data,
        send_from_committer_email: send_from_committer_email?,
        disable_diffs: disable_diffs?
      )
    end

    def notify_for_ref?(push_data)
      return true if push_data[:object_kind] == 'tag_push'
      return true if push_data.dig(:object_attributes, :tag)

      notify_for_branch?(push_data)
    end

    def send_from_committer_email?
      Gitlab::Utils.to_boolean(self.send_from_committer_email)
    end

    def disable_diffs?
      Gitlab::Utils.to_boolean(self.disable_diffs)
    end

    private

    def number_of_recipients_within_limit
      return if recipients.blank?

      if self.class.valid_recipients(recipients).size > RECIPIENTS_LIMIT
        errors.add(:recipients, s_("Integrations|can't exceed %{recipients_limit}") % { recipients_limit: RECIPIENTS_LIMIT })
      end
    end
  end
end