module Spree
  module API
    class Client
      class Error < StandardError

        # Raised when Spree returns a 4xx or 500 HTTP status code
        class ClientError < Error

          # Creates a new error from an HTTP environement
          #
          # @param error [Exception]
          # @return [Spree::API::Client::Error::ClientError]
          def initialize(error=nil)
            if error.respond_to?(:response) && !error.response.nil?
              http_error = error.response[:status].to_i

              if ERROR_MAP.has_key?(http_error)
                raise ERROR_MAP[http_error].new(
                  message: error.response[:body]["error"],
                  validation_errors: error.response[:body]["errors"] || error.response[:body]["exception"])
              else
                super
              end
            else
              super
            end
          end
        end # ClientError

        # Raised when Spree returns a 401 HTTP status code
        class Unauthorized < Error; end

        # Raised when Spree returns a 404 HTTP status code
        class NotFound < Error; end

        # Raised when Spree returns a 422 HTTP status code
        class UnprocessableEntity < Error; end

        ERROR_MAP = {
          401 => Spree::API::Client::Error::Unauthorized,
          404 => Spree::API::Client::Error::NotFound,
          422 => Spree::API::Client::Error::UnprocessableEntity
        }
      end # Error
    end
  end
end