# frozen-string-literal: true

module Rodauth
  Feature.define(:jwt_cors, :JwtCors) do
    depends :jwt

    auth_value_method :jwt_cors_allow_origin, false
    auth_value_method :jwt_cors_allow_methods, 'POST'
    auth_value_method :jwt_cors_allow_headers, 'Content-Type, Authorization, Accept'
    auth_value_method :jwt_cors_expose_headers, 'Authorization'
    auth_value_method :jwt_cors_max_age, 86400

    auth_methods(:jwt_cors_allow?)

    def jwt_cors_allow?
      return false unless origin = request.env['HTTP_ORIGIN']

      case allowed = jwt_cors_allow_origin
      when String
        timing_safe_eql?(origin, allowed)
      when Array
        allowed.any?{|s| timing_safe_eql?(origin, s)}
      when Regexp
        allowed =~ origin
      when true
        true
      else
        false
      end
    end

    private

    def before_rodauth
      if jwt_cors_allow?
        response['Access-Control-Allow-Origin'] = request.env['HTTP_ORIGIN']

        # Handle CORS preflight request
        if request.request_method == 'OPTIONS'
          response['Access-Control-Allow-Methods'] = jwt_cors_allow_methods
          response['Access-Control-Allow-Headers'] = jwt_cors_allow_headers
          response['Access-Control-Max-Age'] = jwt_cors_max_age.to_s
          response.status = 204
          request.halt(response.finish)
        end

        response['Access-Control-Expose-Headers'] = jwt_cors_expose_headers
      end

      super
    end
  end
end