'use strict'

var qs = require('qs')
var querystring = require('querystring')

function Querystring (request) {
 this.request = request
 this.lib = null
 this.useQuerystring = null
 this.parseOptions = null
 this.stringifyOptions = null
}

Querystring.prototype.init = function (options) {
 if (this.lib) { return }

 this.useQuerystring = options.useQuerystring
 this.lib = (this.useQuerystring ? querystring : qs)

 this.parseOptions = options.qsParseOptions || {}
 this.stringifyOptions = options.qsStringifyOptions || {}
}

Querystring.prototype.stringify = function (obj) {
 return (this.useQuerystring)
 ? this.rfc3986(this.lib.stringify(obj,
 this.stringifyOptions.sep || null,
 this.stringifyOptions.eq || null,
 this.stringifyOptions))
 : this.lib.stringify(obj, this.stringifyOptions)
}

Querystring.prototype.parse = function (str) {
 return (this.useQuerystring)
 ? this.lib.parse(str,
 this.parseOptions.sep || null,
 this.parseOptions.eq || null,
 this.parseOptions)
 : this.lib.parse(str, this.parseOptions)
}

Querystring.prototype.rfc3986 = function (str) {
 return str.replace(/[!'()*]/g, function (c) {
 return '%' + c.charCodeAt(0).toString(16).toUpperCase()
 })
}

Querystring.prototype.unescape = querystring.unescape

exports.Querystring = Querystring