import { z } from 'zod';

/* v8 ignore start */
export function formatZodErrorMessages(zodError: z.ZodError): Array<string> {
  return zodError.issues
    .map(issue => {
      const maybeIssuePath = issue.path.length > 0 ? issue.path.join('.') : undefined;
      const formatMessageWithPath = (message: string) =>
        maybeIssuePath ? `${message} on path "${maybeIssuePath}"` : message;

      switch (issue.code) {
        case 'invalid_union': {
          if (issue.message && issue.message.includes('Invalid input')) {
            return (
              issue.unionErrors
                // remove duplicated messages
                .filter(
                  (unionError, index) =>
                    index ===
                    issue.unionErrors.findIndex(error => error.message === unionError.message),
                )
                .map(formatZodErrorMessages)
            );
          }
          return formatMessageWithPath(issue.message);
        }
        default: {
          return formatMessageWithPath(issue.message);
        }
      }
    })
    .flat(10);
}
/* v8 ignore stop */