module Repp
  module V1
    class BaseController < ActionController::API
      rescue_from ActiveRecord::RecordNotFound, with: :not_found_error
      before_action :authenticate_user
      before_action :check_ip_restriction

      attr_reader :current_user

      rescue_from ActionController::ParameterMissing do |exception|
        render json: { code: 2003, message: exception }, status: :bad_request
      end

      private

      def epp_errors
        @errors ||= []
      end

      def handle_errors(obj = nil, update: false)
        @errors ||= []

        if obj
          obj.construct_epp_errors
          @errors += obj.errors[:epp_errors]
        end

        if update
          @errors.each_with_index do |errors, index|
            if errors[:code] == '2304' &&
              errors[:value].present? &&
              errors[:value][:val] == DomainStatus::SERVER_DELETE_PROHIBITED &&
              errors[:value][:obj] == 'status'
              @errors[index][:value][:val] = DomainStatus::PENDING_UPDATE
            end
          end
        end

        @errors.uniq!

        render_epp_error
      end

      def render_epp_error
        render(json: { code: @errors[0][:code], message: @errors[0][:msg] }, status: :bad_request)
      end

      def ip_whitelisted?
        return false unless current_user.registrar.api_ip_white?(request.ip)
      end

      def basic_token
        pattern = /^Basic /
        header  = request.headers['Authorization']
        header.gsub(pattern, '') if header&.match(pattern)
      end

      def authenticate_user
        username, password = Base64.urlsafe_decode64(basic_token).split(':')
        @current_user ||= ApiUser.find_by(username: username, plain_text_password: password)

        return if @current_user

        render(json: { errors: [{ base: ['Not authorized'] }] }, status: :unauthorized)
      end

      def check_ip_restriction
        ip_restriction = Authorization::RestrictedIP.new(request.ip)
        allowed = ip_restriction.can_access_registrar_area?(@current_user.registrar)

        return if allowed

        render(json: { errors: [{ base: [I18n.t('registrar.authorization.ip_not_allowed', ip: request.ip)] }] }, status: :unauthorized)
      end

      def not_found_error
        render(json: { code: 2303, message: 'Object does not exist' }, status: :not_found)
      end
    end
  end
end