export default function Router (namedRoutes) {

  const provide = function (name) {
    return namedRoutes[name]
  }

  const preg_quote = function (str, delimiter) {
    //  discuss at: http://phpjs.org/functions/preg_quote/
    // original by: booeyOH
    // improved by: Ates Goral (http://magnetiq.com)
    // improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // improved by: Brett Zamir (http://brett-zamir.me)
    // bugfixed by: Onno Marsman
    //   example 1: preg_quote("$40");
    //   returns 1: '\\$40'
    //   example 2: preg_quote("*RRRING* Hello?");
    //   returns 2: '\\*RRRING\\* Hello\\?'
    //   example 3: preg_quote("\\.+*?[^]$(){}=!<>|:");
    //   returns 3: '\\\\\\.\\+\\*\\?\\[\\^\\]\\$\\(\\)\\{\\}\\=\\!\\<\\>\\|\\:'
    return String(str)
      .replace(new RegExp('[.\\\\+*?\\[\\^\\]$(){}=!<>|:\\' + (delimiter || '') + '-]', 'g'), '\\$&')
  }

  const http_build_query = function (formdata, numeric_prefix, arg_separator) {
    //  discuss at: http://phpjs.org/functions/http_build_query/
    // original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // improved by: Legaev Andrey
    // improved by: Michael White (http://getsprink.com)
    // improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // improved by: Brett Zamir (http://brett-zamir.me)
    //  revised by: stag019
    //    input by: Dreamer
    // bugfixed by: Brett Zamir (http://brett-zamir.me)
    // bugfixed by: MIO_KODUKI (http://mio-koduki.blogspot.com/)
    //        note: If the value is null, key and value are skipped in the http_build_query of PHP while in phpjs they are not.
    //  depends on: urlencode
    //   example 1: http_build_query({foo: 'bar', php: 'hypertext processor', baz: 'boom', cow: 'milk'}, '', '&amp;');
    //   returns 1: 'foo=bar&amp;php=hypertext+processor&amp;baz=boom&amp;cow=milk'
    //   example 2: http_build_query({'php': 'hypertext processor', 0: 'foo', 1: 'bar', 2: 'baz', 3: 'boom', 'cow': 'milk'}, 'myvar_');
    //   returns 2: 'myvar_0=foo&myvar_1=bar&myvar_2=baz&myvar_3=boom&php=hypertext+processor&cow=milk'

    var value, key, tmp = []

    var _http_build_query_helper = function (key, val, arg_separator) {
      var k, tmp = []
      if (val === true) {
        val = '1'
      } else if (val === false) {
        val = '0'
      }
      if (val != null) {
        if (typeof val === 'object') {
          for (k in val) {
            if (val[k] != null) {
              tmp.push(_http_build_query_helper(key + '[' + k + ']', val[k], arg_separator))
            }
          }
          return tmp.join(arg_separator)
        } else if (typeof val !== 'function') {
          return urlencode(key) + '=' + urlencode(val)
        } else {
          throw new Error('There was an error processing for http_build_query().')
        }
      } else {
        return ''
      }
    }

    if (!arg_separator) {
      arg_separator = '&'
    }
    for (key in formdata) {
      value = formdata[key]
      if (numeric_prefix && !isNaN(key)) {
        key = String(numeric_prefix) + key
      }
      var query = _http_build_query_helper(key, value, arg_separator)
      if (query !== '') {
        tmp.push(query)
      }
    }

    return tmp.join(arg_separator)
  }

  const urlencode = function (str) {
    //       discuss at: http://phpjs.org/functions/urlencode/
    //      original by: Philip Peterson
    //      improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    //      improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    //      improved by: Brett Zamir (http://brett-zamir.me)
    //      improved by: Lars Fischer
    //         input by: AJ
    //         input by: travc
    //         input by: Brett Zamir (http://brett-zamir.me)
    //         input by: Ratheous
    //      bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    //      bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    //      bugfixed by: Joris
    // reimplemented by: Brett Zamir (http://brett-zamir.me)
    // reimplemented by: Brett Zamir (http://brett-zamir.me)
    //             note: This reflects PHP 5.3/6.0+ behavior
    //             note: Please be aware that this function expects to encode into UTF-8 encoded strings, as found on
    //             note: pages served as UTF-8
    //        example 1: urlencode('Kevin van Zonneveld!');
    //        returns 1: 'Kevin+van+Zonneveld%21'
    //        example 2: urlencode('http://kevin.vanzonneveld.net/');
    //        returns 2: 'http%3A%2F%2Fkevin.vanzonneveld.net%2F'
    //        example 3: urlencode('http://www.google.nl/search?q=php.js&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:unofficial&client=firefox-a');
    //        returns 3: 'http%3A%2F%2Fwww.google.nl%2Fsearch%3Fq%3Dphp.js%26ie%3Dutf-8%26oe%3Dutf-8%26aq%3Dt%26rls%3Dcom.ubuntu%3Aen-US%3Aunofficial%26client%3Dfirefox-a'

    str = (str + '')
      .toString()

    // Tilde should be allowed unescaped in future versions of PHP (as reflected below), but if you want to reflect current
    // PHP behavior, you would need to add ".replace(/~/g, '%7E');" to the following.
    return encodeURIComponent(str)
      .replace(/!/g, '%21')
      .replace(/'/g, '%27')
      .replace(/\(/g, '%28')
      .replace(/\)/g, '%29')
      .replace(/\*/g, '%2A')
      .replace(/%20/g, '+')
  }

  this.urlFor = function (host, name, parameters, queryParameters) {
    let url
    let search
    let queryString
    let pattern = provide(name)
    for (let key in parameters) {
      search = new RegExp('{' + preg_quote(key, '#') + '}')
      pattern = pattern.replace(search, parameters[key])
    }
    url = pattern.replace('#\\(/?:.+\\)|\\(|\\)|\\\\#', '')
    if (queryParameters && 0 < Object.keys(queryParameters).length) {
      queryString = http_build_query(queryParameters)
      if (queryString !== '') {
        // With plain permalinks the REST root is already a query string
        // (index.php?rest_route=/...), so further params must use '&'.
        url += (host.includes('?') ? '&' : '?') + queryString
      }
    }
    return `${ host }${ url }`
  }
}