"use strict";

const matchValidationError = require("@validatem/match-validation-error");

module.exports = function annotateErrors(options) {
	if (options.pathSegments == null) {
		throw new Error(`'pathSegments' is a required option`);
	} else if (!Array.isArray(options.pathSegments)) {
		throw new Error(`'pathSegments' must be an array`);
	} else if (options.errors == null) {
		throw new Error(`'errors' is a required option`);
	} else if (!Array.isArray(options.errors)) {
		throw new Error(`'errors' must be an array`);
	} else {
		// NOTE: We mutate the error here, because Error objects are not safely cloneable
		for (let error of options.errors) {
			// Leave non-ValidationError errors alone, even though they should not be present
			if (matchValidationError(error)) {
				error.path = options.pathSegments.concat(error.path);
			}
		}

		return options.errors;
	}
};