'use strict';

var util = require('./util');

var DATE = /^\d\d\d\d-(\d\d)-(\d\d)$/;
var DAYS = [0,31,29,31,30,31,30,31,31,30,31,30,31];
var TIME = /^(\d\d):(\d\d):(\d\d)(\.\d+)?(z|[+-]\d\d:\d\d)?$/i;
var HOSTNAME = /^[0-9a-z](?:(?:[-0-9a-z]{0,61})?[0-9a-z])?(\.[0-9a-z](?:(?:[-0-9a-z]{0,61})?[0-9a-z])?)*$/i;
var URI = /^(?:[a-z][a-z0-9+\-.]*:)?(?:\/?\/(?:(?:[a-z0-9\-._~!$&'()*+,;=:]|%[0-9a-f]{2})*@)?(?:\[(?:(?:(?:(?:[0-9a-f]{1,4}:){6}|::(?:[0-9a-f]{1,4}:){5}|(?:[0-9a-f]{1,4})?::(?:[0-9a-f]{1,4}:){4}|(?:(?:[0-9a-f]{1,4}:){0,1}[0-9a-f]{1,4})?::(?:[0-9a-f]{1,4}:){3}|(?:(?:[0-9a-f]{1,4}:){0,2}[0-9a-f]{1,4})?::(?:[0-9a-f]{1,4}:){2}|(?:(?:[0-9a-f]{1,4}:){0,3}[0-9a-f]{1,4})?::[0-9a-f]{1,4}:|(?:(?:[0-9a-f]{1,4}:){0,4}[0-9a-f]{1,4})?::)(?:[0-9a-f]{1,4}:[0-9a-f]{1,4}|(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?))|(?:(?:[0-9a-f]{1,4}:){0,5}[0-9a-f]{1,4})?::[0-9a-f]{1,4}|(?:(?:[0-9a-f]{1,4}:){0,6}[0-9a-f]{1,4})?::)|[Vv][0-9a-f]+\.[a-z0-9\-._~!$&'()*+,;=:]+)\]|(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)|(?:[a-z0-9\-._~!$&'()*+,;=]|%[0-9a-f]{2})*)(?::\d*)?(?:\/(?:[a-z0-9\-._~!$&'()*+,;=:@]|%[0-9a-f]{2})*)*|\/(?:(?:[a-z0-9\-._~!$&'()*+,;=:@]|%[0-9a-f]{2})+(?:\/(?:[a-z0-9\-._~!$&'()*+,;=:@]|%[0-9a-f]{2})*)*)?|(?:[a-z0-9\-._~!$&'()*+,;=:@]|%[0-9a-f]{2})+(?:\/(?:[a-z0-9\-._~!$&'()*+,;=:@]|%[0-9a-f]{2})*)*)(?:\?(?:[a-z0-9\-._~!$&'()*+,;=:@\/?]|%[0-9a-f]{2})*)?(?:\#(?:[a-z0-9\-._~!$&'()*+,;=:@\/?]|%[0-9a-f]{2})*)?$/i;
var UUID = /^(?:urn\:uuid\:)?[0-9a-f]{8}-(?:[0-9a-f]{4}-){3}[0-9a-f]{12}$/i;
var JSON_POINTER = /^(?:\/(?:[^~\/]|~0|~1)*)*$|^\#(?:\/(?:[a-z0-9_\-\.!$&'()*+,;:=@]|%[0-9a-f]{2}|~0|~1)*)*$/i;
var RELATIVE_JSON_POINTER = /^(?:0|[1-9][0-9]*)(?:\#|(?:\/(?:[^~\/]|~0|~1)*)*)$/;


module.exports = formats;

function formats(mode) {
  mode = mode == 'full' ? 'full' : 'fast';
  var formatDefs = util.copy(formats[mode]);
  for (var fName in formats.compare) {
    formatDefs[fName] = {
      validate: formatDefs[fName],
      compare: formats.compare[fName]
    };
  }
  return formatDefs;
}


formats.fast = {
  // date: http://tools.ietf.org/html/rfc3339#section-5.6
  date: /^\d\d\d\d-[0-1]\d-[0-3]\d$/,
  // date-time: http://tools.ietf.org/html/rfc3339#section-5.6
  time: /^[0-2]\d:[0-5]\d:[0-5]\d(?:\.\d+)?(?:z|[+-]\d\d:\d\d)?$/i,
  'date-time': /^\d\d\d\d-[0-1]\d-[0-3]\d[t\s][0-2]\d:[0-5]\d:[0-5]\d(?:\.\d+)?(?:z|[+-]\d\d:\d\d)$/i,
  // uri: https://github.com/mafintosh/is-my-json-valid/blob/master/formats.js
  uri: /^(?:[a-z][a-z0-9+-.]*)?(?:\:|\/)\/?[^\s]*$/i,
  // email (sources from jsen validator):
  // http://stackoverflow.com/questions/201323/using-a-regular-expression-to-validate-an-email-address#answer-8829363
  // http://www.w3.org/TR/html5/forms.html#valid-e-mail-address (search for 'willful violation')
  email: /^[a-z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?(?:\.[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?)*$/i,
  hostname: HOSTNAME,
  // optimized https://www.safaribooksonline.com/library/view/regular-expressions-cookbook/9780596802837/ch07s16.html
  ipv4: /^(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)$/,
  // optimized http://stackoverflow.com/questions/53497/regular-expression-that-matches-valid-ipv6-addresses
  ipv6: /^\s*(?:(?:(?:[0-9a-f]{1,4}:){7}(?:[0-9a-f]{1,4}|:))|(?:(?:[0-9a-f]{1,4}:){6}(?::[0-9a-f]{1,4}|(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(?:(?:[0-9a-f]{1,4}:){5}(?:(?:(?::[0-9a-f]{1,4}){1,2})|:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(?:(?:[0-9a-f]{1,4}:){4}(?:(?:(?::[0-9a-f]{1,4}){1,3})|(?:(?::[0-9a-f]{1,4})?:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?:(?:[0-9a-f]{1,4}:){3}(?:(?:(?::[0-9a-f]{1,4}){1,4})|(?:(?::[0-9a-f]{1,4}){0,2}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?:(?:[0-9a-f]{1,4}:){2}(?:(?:(?::[0-9a-f]{1,4}){1,5})|(?:(?::[0-9a-f]{1,4}){0,3}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?:(?:[0-9a-f]{1,4}:){1}(?:(?:(?::[0-9a-f]{1,4}){1,6})|(?:(?::[0-9a-f]{1,4}){0,4}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?::(?:(?:(?::[0-9a-f]{1,4}){1,7})|(?:(?::[0-9a-f]{1,4}){0,5}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))(?:%.+)?\s*$/i,
  regex: regex,
  // uuid: http://tools.ietf.org/html/rfc4122
  uuid: UUID,
  // JSON-pointer: https://tools.ietf.org/html/rfc6901
  // uri fragment: https://tools.ietf.org/html/rfc3986#appendix-A
  'json-pointer': JSON_POINTER,
  // relative JSON-pointer: http://tools.ietf.org/html/draft-luff-relative-json-pointer-00
  'relative-json-pointer': RELATIVE_JSON_POINTER
};


formats.full = {
  date: date,
  time: time,
  'date-time': date_time,
  uri: uri,
  email: /^[a-z0-9!#$%&'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&''*+\/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$/i,
  hostname: hostname,
  ipv4: /^(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)$/,
  ipv6: /^\s*(?:(?:(?:[0-9a-f]{1,4}:){7}(?:[0-9a-f]{1,4}|:))|(?:(?:[0-9a-f]{1,4}:){6}(?::[0-9a-f]{1,4}|(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(?:(?:[0-9a-f]{1,4}:){5}(?:(?:(?::[0-9a-f]{1,4}){1,2})|:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(?:(?:[0-9a-f]{1,4}:){4}(?:(?:(?::[0-9a-f]{1,4}){1,3})|(?:(?::[0-9a-f]{1,4})?:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?:(?:[0-9a-f]{1,4}:){3}(?:(?:(?::[0-9a-f]{1,4}){1,4})|(?:(?::[0-9a-f]{1,4}){0,2}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?:(?:[0-9a-f]{1,4}:){2}(?:(?:(?::[0-9a-f]{1,4}){1,5})|(?:(?::[0-9a-f]{1,4}){0,3}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?:(?:[0-9a-f]{1,4}:){1}(?:(?:(?::[0-9a-f]{1,4}){1,6})|(?:(?::[0-9a-f]{1,4}){0,4}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(?::(?:(?:(?::[0-9a-f]{1,4}){1,7})|(?:(?::[0-9a-f]{1,4}){0,5}:(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))(?:%.+)?\s*$/i,
  regex: regex,
  uuid: UUID,
  'json-pointer': JSON_POINTER,
  'relative-json-pointer': RELATIVE_JSON_POINTER
};


formats.compare = {
  date: compareDate,
  time: compareTime,
  'date-time': compareDateTime
};


function date(str) {
  // full-date from http://tools.ietf.org/html/rfc3339#section-5.6
  var matches = str.match(DATE);
  if (!matches) return false;

  var month = +matches[1];
  var day = +matches[2];
  return month >= 1 && month <= 12 && day >= 1 && day <= DAYS[month];
}


function time(str, full) {
  var matches = str.match(TIME);
  if (!matches) return false;

  var hour = matches[1];
  var minute = matches[2];
  var second = matches[3];
  var timeZone = matches[5];
  return hour <= 23 && minute <= 59 && second <= 59 && (!full || timeZone);
}


var DATE_TIME_SEPARATOR = /t|\s/i;
function date_time(str) {
  // http://tools.ietf.org/html/rfc3339#section-5.6
  var dateTime = str.split(DATE_TIME_SEPARATOR);
  return dateTime.length == 2 && date(dateTime[0]) && time(dateTime[1], true);
}


function hostname(str) {
  // https://tools.ietf.org/html/rfc1034#section-3.5
  // https://tools.ietf.org/html/rfc1123#section-2
  return str.length <= 255 && HOSTNAME.test(str);
}


var NOT_URI_FRAGMENT = /\/|\:/;
function uri(str) {
  // http://jmrware.com/articles/2009/uri_regexp/URI_regex.html + optional protocol + required "."
  return NOT_URI_FRAGMENT.test(str) && URI.test(str);
}


function regex(str) {
  try {
    new RegExp(str);
    return true;
  } catch(e) {
    return false;
  }
}


function compareDate(d1, d2) {
  if (!(d1 && d2)) return;
  if (d1 > d2) return 1;
  if (d1 < d2) return -1;
  if (d1 === d2) return 0;
}


function compareTime(t1, t2) {
  if (!(t1 && t2)) return;
  t1 = t1.match(TIME);
  t2 = t2.match(TIME);
  if (!(t1 && t2)) return;
  t1 = t1[1] + t1[2] + t1[3] + (t1[4]||'');
  t2 = t2[1] + t2[2] + t2[3] + (t2[4]||'');
  if (t1 > t2) return 1;
  if (t1 < t2) return -1;
  if (t1 === t2) return 0;
}


function compareDateTime(dt1, dt2) {
  if (!(dt1 && dt2)) return;
  dt1 = dt1.split(DATE_TIME_SEPARATOR);
  dt2 = dt2.split(DATE_TIME_SEPARATOR);
  var res = compareDate(dt1[0], dt2[0]);
  if (res === undefined) return;
  return res || compareTime(dt1[1], dt2[1]);
}