/**
 * API Error handling
 *
 * @author [Mike Wang]
 * @version 1.0.0
 */

export enum ErrorType {
  EMPTY_FIELD = 'empty_field',
  ALREADY_EXISTS = 'already_exists',
}

// All error messages. Can be functions if inputs are required.
const errorMessages = {
  emptyField: (field: string) => `${field} is required`,
  alreadyExists: (entity: string, field: string, value: string) => {
    return `${entity} with the ${field} "${value}" already exists`;
  },
};

/**
 * Parse an API error message in a standard way so it can be handled accordingly
 *
 * @param error
 * @returns
 */
export const parseError = (error: any) => {
  let message = error.response?.data?.message;
  console.log('API Error:', message);

  if (Array.isArray(message)) message = message[0];
  if (!message) return {};

  // parse error cases
  let emptyMatch = message.match(/^(.+) should not be empty/i);
  if (emptyMatch)
    return {
      type: ErrorType.EMPTY_FIELD,
      msg: errorMessages.emptyField,
      field: emptyMatch[1],
    };

  let existsMatch = message.match(/Unique constraint violation: ([^\s]+)$/i);
  if (existsMatch)
    return {
      type: ErrorType.ALREADY_EXISTS,
      msg: errorMessages.alreadyExists,
      field: existsMatch[1],
    };

  return {};
};