# frozen_string_literal: true

require_relative '../../components/govuk/error_summary'

module CCS
  module FrontendHelpers::GovUKFrontend
    # = GOV.UK Error Summary
    #
    # This helper is used for generating the error summary component from the
    # {https://design-system.service.gov.uk/components/error-summary GDS - Components - Error summary}

    module ErrorSummary
      # Generates the HTML for the GOV.UK Error summary component
      #
      # @param (see CCS::Components::GovUK::ErrorSummary#initialize)
      #
      # @option (see CCS::Components::GovUK::ErrorSummary#initialize)
      #
      # @return (see CCS::Components::GovUK::ErrorSummary#render)

      def govuk_error_summary(title, error_summary_items, description = nil, **options)
        Components::GovUK::ErrorSummary.new(context: self, title: title, error_summary_items: error_summary_items, description: description, **options).render
      end

      # Generates the HTML for the GOV.UK Error summary component using the error messages in an ActiveModel
      #
      # @param model [ActiveModel] model that will be used to find the error messages to list
      # @param title [String] text to use for the heading of the error summary block
      # @param description [String] (nil) optional text to use for the description of the errors
      # @param options [Hash] options that will be used in customising the HTML
      #
      # @option (see CCS::Components::GovUK::ErrorSummary#initialize)
      #
      # @return [NilClass, ActiveSupport::SafeBuffer] if error messages are not on the model it will return nil,
      #                                               otherwise it returns the error summary HTML.

      def govuk_error_summary_with_model(model, title, description = nil, **options)
        return if model.errors.blank?

        error_summary_items = model.errors.map { |error| { text: error.message, href: "##{error.attribute}-error" } }

        Components::GovUK::ErrorSummary.new(context: self, title: title, error_summary_items: error_summary_items, description: description, **options).render
      end
    end
  end
end