'use strict';

// Load modules

const Hoek = require('hoek');

// Declare internals

const internals = {};

exports.create = function (key, options) {

Hoek.assert(typeof key === 'string', 'Invalid reference key:', key);

const settings = options ? Hoek.clone(options) : {}; // options can be reused and modified

const ref = function (parent, value, validationOptions) {

const target = ref.isContext ? validationOptions.context : (settings.self ? value : parent);

return Hoek.reach(target, ref.key, settings);

};

const contextPrefix = settings.contextPrefix || '$';

const separator = settings.separator || '.';

ref.isContext = (key[0] === contextPrefix);

if (!ref.isContext &&

key[0] === separator) {

key = key.slice(1);

settings.self = true;

}

ref.key = (ref.isContext ? key.slice(1) : key);

ref.path = ref.key.split(separator);

ref.depth = ref.path.length;

ref.root = ref.path[0];

ref.isJoi = true;

ref.toString = function () {

return (ref.isContext ? 'context:' : 'ref:') + ref.key;

};

return ref;

};

exports.isRef = function (ref) {

return typeof ref === 'function' && ref.isJoi;

};

exports.push = function (array, ref) {

if (exports.isRef(ref) &&

!ref.isContext) {

array.push(ref.root);

}

};