'use strict';
var errorEx = require('error-ex');
var fallback = require('./vendor/parse');

var JSONError = errorEx('JSONError', {
	fileName: errorEx.append('in %s')
});

module.exports = function (x, reviver, filename) {
	if (typeof reviver === 'string') {
		filename = reviver;
		reviver = null;
	}

	try {
		try {
			return JSON.parse(x, reviver);
		} catch (err) {
			fallback.parse(x, {
				mode: 'json',
				reviver: reviver
			});

			throw err;
		}
	} catch (err) {
		var jsonErr = new JSONError(err);

		if (filename) {
			jsonErr.fileName = filename;
		}

		throw jsonErr;
	}
};