(function () {
'use strict';

  var cache = { recordsMap: {} };
  var myZone;
  window.ADNS = { cache: cache, $qs: $qs  };

  if (!Element.prototype.matches) {
    Element.prototype.matches = Element.prototype.msMatchesSelector;
  }
  function $qs(qs, el) {
    return (el||document).querySelector(qs);
  }
  function $qsa(qs, el) {
    return Array.prototype.slice.call((el||document).querySelectorAll(qs));
  }
  function $on(selector, eventname, cb) {
    if (!$on._events[eventname]) {
      $on._events[eventname] = $on._dispatcher(eventname);
      document.addEventListener(eventname, $on._events[eventname]);
    }
    if (!$on._handlers[eventname]) {
      $on._handlers[eventname] = {};
    }
    if (!$on._handlers[eventname][selector]) {
      $on._handlers[eventname][selector] = [];
    }
    $on._handlers[eventname][selector].push(cb);
  }
  $on._events = {};
  $on._handlers = {};
  $on._dispatcher = function (eventname) {
    return function (ev) {
      //console.log('event: ' + ev.type);
      if (!$on._handlers[eventname]) {
        console.warn('no handlers for event');
        return;
      }
      var matches = Object.keys($on._handlers[eventname]).some(function (selector) {
        if (ev.target.matches(selector)) {
          $on._handlers[eventname][selector].forEach(function (cb) { cb(ev); });
          return true;
        }
      });
      if (matches) {
        console.warn("no handlers for selector");
      }
    };
  };

  function verifyAuth(/*ev*/) {
    auth = $qs('input.js-jwt').value;
    return window.fetch(
      '/api/verify-auth'
    , { method: 'GET'
      , headers: new window.Headers({ 'Authorization': 'Bearer ' + auth })
      }
    ).then(function (resp) {
      return resp.json().then(function (data) {
        if (data.error) {
          localStorage.removeItem('auth');
          console.error(data.error);
          window.alert('Bad HTTP Response: ' + data.error.message);
          throw new Error('Bad HTTP Response: ' + data.error.message);
        }

        console.log('verify-auth:');
        console.log(data);

        localStorage.setItem('auth', auth);

        return fetchPeers(auth).then(function () {
          return fetchZones(auth);
        });
      });
    });
  }
  function fetchPeers(auth) {
    return window.fetch('/api/peers', {
      method: 'GET'
    , headers: new window.Headers({ 'Authorization': 'Bearer ' + auth })
    }).then(function (resp) {
      return resp.json().then(function (data) {
        var tpl = '';
        var el;
        if (!tpls.peer) {
          tpls.peer = $qs('.js-peer-tpl').innerHTML;
        }
        data.peers.forEach(function (peer) {
          el = document.createElement('div');
          el.innerHTML = tpls.peer;
          console.log(el);
          console.log($qs('.js-peer-name', el));
          $qs('.js-peer-name', el).innerText = peer.name;
          $qs('.js-peer-name', el).dataset.id = peer.name;
          console.log(el.innerHTML);
          tpl += el.innerHTML;
          console.log(tpl);
        });
        $qs('.js-peer-tpl').innerHTML = tpl;
        console.log($qs('.js-peer-tpl').innerHTML);
      });
    });
  }
  function fetchZones(auth) {
    return window.fetch('/api/zones', {
      method: 'GET'
    , headers: new window.Headers({ 'Authorization': 'Bearer ' + auth })
    }).then(function (resp) {
      return resp.json().then(function (data) {
        var tpl = '';
        var el;
        if (!tpls.zone) {
          tpls.zone = $qs('.js-zone-tpl').innerHTML;
        }
        data.zones.forEach(function (zone) {
          el = document.createElement('div');
          el.innerHTML = tpls.zone;
          console.log(el);
          console.log($qs('.js-zone-name', el));
          $qs('.js-zone-name', el).innerText = zone.name;
          $qs('.js-zone-name', el).dataset.id = zone.id;
          $qs('.js-zone-name', el).dataset.name = zone.name;
          console.log(el.innerHTML);
          tpl += el.innerHTML;
          console.log(tpl);
        });
        $qs('.js-zone-tpl').innerHTML = tpl;
        console.log($qs('.js-zone-tpl').innerHTML);
      });
    });
  }
  function renderRecords() {
    var tpl = '';
    var el;
    if (!tpls.recordsMap) {
      //tpls.recordTypes = Array.prototype.slice.call($qsa('.js-record-tpl li'));
      //.innerHTML;
      tpls.recordsMap = {};
      tpls.recordsMap.soa = $qs('.js-record-soa').outerHTML;
      tpls.recordsMap.ns = $qs('.js-record-ns').outerHTML;
      tpls.recordsMap.a = $qs('.js-record-a').outerHTML;
      tpls.recordsMap.aaaa = $qs('.js-record-aaaa').outerHTML;
      tpls.recordsMap.aname = $qs('.js-record-aname').outerHTML;
      tpls.recordsMap.cname = $qs('.js-record-cname').outerHTML;
      tpls.recordsMap.caa = $qs('.js-record-caa').outerHTML;
      tpls.recordsMap.ptr = $qs('.js-record-ptr').outerHTML;
      tpls.recordsMap.mx = $qs('.js-record-mx').outerHTML;
      tpls.recordsMap.txt = $qs('.js-record-txt').outerHTML;
      tpls.recordsMap.srv = $qs('.js-record-srv').outerHTML;
      //tpls.recordsMap.typex = $qs('.js-record-typex').outerHTML;
    }
    console.log('tpls.recordsMap:');
    console.log(tpls.recordsMap);
    cache.records.forEach(function (record) {
      el = document.createElement('div');
      console.log('record.type:', record.type);
      el.innerHTML = tpls.recordsMap[record.type.toLowerCase()];
      console.log(el);
      console.log($qs('.js-record-name', el));
      Object.keys(record).sort().forEach(function (key) {
        if ('id' === key) { return; }
        var x = $qs('.js-record-' + key, el);
        if (x) {
          x.innerText = record[key];
        }
      });
      el.dataset.recordId = record.id;
      $qs('input.js-record-id', el).value = record.id;
      cache.recordsMap[record.id] = record;

      //$qs('.js-record-type', el).innerText = record.type;
      //$qs('.js-record-name', el).innerText = record.name;
      //$qs('.js-record-address', el).innerText = record.address;
      console.log('el.innerHTML:');
      console.log(el.innerHTML);
      tpl += el.innerHTML;
      console.log(tpl);
    });
    $qs('.js-record-tpl').innerHTML = tpl;
    console.log($qs('.js-record-tpl').innerHTML);
  }
  function fetchRecords(zone) {
    return window.fetch('/api/zones/' + zone + '/records', {
      method: 'GET'
    , headers: new window.Headers({ 'Authorization': 'Bearer ' + auth })
    }).then(function (resp) {
      return resp.json().then(function (data) {
        cache.records = data.records;
        renderRecords();
      });
    });
  }

  // BEGIN
  var tpls = {};
  var auth = localStorage.getItem('auth');
  if (auth) {
    $qs('input.js-jwt').value = auth;
    verifyAuth();
  }

  $on('body', 'click', function () {
    console.log('woo-hoo, that tickles my body!');
  });

  $on('button.js-jwt', 'click', verifyAuth);

  $on('input.js-zone', 'keyup', function (ev) {
    $qs('code.js-zone').innerHTML = ev.target.value || ':zone';
    // $qs('a.js-zone').setAttribute('data-href', ...)
    $qs('a.js-zone').href =
      $qs('a.js-zone').dataset.href.replace(/:zone/, ev.target.value || ':zone');
  });

  $on('input.js-name', 'keyup', function (ev) {
    $qs('code.js-name').innerHTML = ev.target.value || ':name';
    $qs('a.js-name').href =
      $qs('a.js-name').dataset.href.replace(/:name/, ev.target.value || ':name');
  });

  $on('button.js-zone-name', 'click', function (ev) {
    var zone = ev.target.dataset.name;
    myZone = zone;
    return fetchRecords(zone);/*.then(function () {
    });*/
  });
  $on('button.js-zone-new', 'click', function (/*ev*/) {
    $qs('select.js-record-form-type').value = 'SOA';
    $qs('select.js-record-form-type').dispatchEvent(new Event('change', { bubbles: true }));
  });

  $on('select.js-record-form-type', 'change', function (ev) {
    var type = ev.target.value;
    var $tpl;
    console.log("form type:", type);
    if (!tpls.formsMap) {
      tpls.formsMap = {};
      tpls.formsMap.SOA = $qs('.js-record-form-soa').outerHTML;
      tpls.formsMap.NS = $qs('.js-record-form-ns').outerHTML;
      tpls.formsMap.A = $qs('.js-record-form-a').outerHTML;
      tpls.formsMap.AAAA = $qs('.js-record-form-aaaa').outerHTML;
      tpls.formsMap.ANAME = $qs('.js-record-form-aname').outerHTML;
      tpls.formsMap.CAA = $qs('.js-record-form-caa').outerHTML;
      tpls.formsMap.CNAME = $qs('.js-record-form-cname').outerHTML;
      tpls.formsMap.MX = $qs('.js-record-form-mx').outerHTML;
      tpls.formsMap.PTR = $qs('.js-record-form-ptr').outerHTML;
      tpls.formsMap.SRV = $qs('.js-record-form-srv').outerHTML;
      tpls.formsMap.TXT = $qs('.js-record-form-txt').outerHTML;
      tpls.formsMap.typeX = $qs('.js-record-form-typex').outerHTML;
    }
    $tpl = $qs('.js-record-form-tpl');
    $tpl.innerHTML = tpls.formsMap[type] || '';
    $qs('.js-record-type', $tpl).innerText = type;
    $qs('.js-record-zone', $tpl).innerText = myZone;
  });
  $on('button.js-record-form-new', 'click', function (/*ev*/) {
    var type = $qs('select.js-record-form-type').value;
    if (!type) {
      $qs('select.js-record-form-type').value = 'A';
    }
    $qs('select.js-record-form-type').dispatchEvent(new Event('change', { bubbles: true }));
  });

  $on('button.js-record-edit', 'click', function (ev) {
    var id = ev.target.parentElement.querySelector('.js-record-id').value;
    var record = cache.recordsMap[id];
    var formTpl = tpls.formsMap[record.type];
    var $tpl;
    if (!formTpl) {
      formTpl = tpls.formsMap.typeX;
    }

    console.log(ev.target);
    console.log(id);
    console.log(record);

    formTpl = tpls.formsMap[(record.type||'typeX')];
    $qs('select.js-record-form-type').value = (record.type||'typeX');
    $qs('select.js-record-form-type').dispatchEvent(new Event('change', { bubbles: true }));
    $tpl = $qs('.js-record-form-tpl');
    $tpl.innerHTML = formTpl || '';

    record.host = record.name.replace(new RegExp('\\.?' + (record.zone || record.name).replace(/\./g, '\\.') + '$'), '');

    console.log('record.type:');
    console.log(record.type);

    Object.keys(record).forEach(function (key) {
      var $el = $qs('.js-record-' + key, $tpl);
      if (!$el) {
        return;
      }
      $el.value = record[key];
    });
    if ('SOA' === record.type) {
      $qs('.js-record-name').disabled = 'disabled';
    } else {
      if (!record.host) { $qs('.js-record-host', $tpl).placeholder = '@'; }
    }
    $qs('.js-record-type', $tpl).innerHTML = record.type;
    $qs('.js-record-zone', $tpl).innerText = myZone;
  });

  $on('button.js-record-save', 'click', function (ev) {
    console.log('save');
    var $pel = ev.target.parentElement;
    var id = $qs('.js-record-id', $pel).value;
    var existingRecord = cache.recordsMap[id];
    var record = {};
    var change;

    $qsa('input[class*="js-record-"]', $pel).forEach(function ($el) {
      var key;
      Array.prototype.some.call($el.classList, function (str) {
        if (/^js-record-/.test(str)) {
          key = str.replace(/^js-record-(.*)/, '$1');
          return true;
        }
      });
      if (!key) { return; }
      if ('undefined' === typeof $el.value || 'INPUT' !== $el.tagName) { return; }
      record[key] = $el.value;
    });

    if (!record.id) {
      record.id = '';
    }
    if (!record.zone) {
      record.zone = myZone;
    }
    if (!record.name) {
      if (record.host) {
        record.name = record.host + '.' + myZone;
      } else {
        record.name = myZone;
      }
    }

    record.type = record.type || $qs('.js-record-type', $pel).innerHTML || $qs('.js-record-type', $pel).value;
    console.log('record.type:', record.type);
    /*
    if (!tpls.recordsMap[record.type.toLowerCase()]) {
      record.typex = 'typex';
    }
    */

    if (!existingRecord) {
      change = true;
      cache.recordsMap[record.id] = record;
      cache.records.push(record);
    } else {
      console.log('keys:', Object.keys(record));
      Object.keys(record).forEach(function (key) {
        console.log('key:', key);
        //if ('SOA' === record.type && 'zone' === key) { return; }
        if (existingRecord[key].toString() !== record[key].toString()) {
          change = true;
          existingRecord[key] = record[key];
        }
      });
    }

    if (!change) {
      return;
    }

    renderRecords();

    return window.fetch(
      '/api/records/' + record.id
    , { method: 'POST'
      , headers: new window.Headers({
          'Authorization': 'Bearer ' + auth
        , 'Content-Type': 'application/json;charset=UTF-8'
        })
      , body: JSON.stringify(record)
      }
    ).then(function (resp) {
      return resp.json().then(function (data) {
        if (data.error) {
          console.error(data);
          window.alert(data.error.message);
          return;
        }
        console.log('result:', data);
        if (!record.id) {
          record.id = data.id;
          renderRecords();
        }
      });
    });
  });

  $qs('select.js-record-form-type').value = '';
  // Create a new 'change' event and dispatch it.
  $qs('select.js-record-form-type').dispatchEvent(new Event('change', { bubbles: true }));

}());