/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
(function(_global) {
  var options;

  function setAttributes(elem, attrs) {
    if (!attrs) {
      return;
    }
    Object.keys(attrs).forEach(function(key) { elem.setAttribute(key, attrs[key]); });
  }

  function createLi(attrs) {
    var li = document.createElement('li');
    setAttributes(li, attrs);
    return li;
  }

  function createLabel(attrs) {
    var label = document.createElement('label');
    setAttributes(label, attrs);
    return label;
  }

  function createButton(attrs, innerHtml) {
    var button = document.createElement('button');
    button.innerHTML = innerHtml;
    setAttributes(button, attrs);
    return button;
  }

  function createTextNode(text) { return document.createTextNode(text); }

  function createCheckbox(attrs, checked) {
    var checkbox = document.createElement('input');
    checkbox.type = 'checkbox';
    checkbox.checked = !!checked;
    setAttributes(checkbox, attrs);
    return checkbox;
  }

  function createUl(attrs) {
    var ul = document.createElement('ul');
    setAttributes(ul, attrs);
    return ul;
  }

  var serailPromise = _global['__zone_symbol__serialPromise'];

  _global['__zone_symbol__testTargetsUIBuild'] = function(_options) {
    options = _options;
    var allButton = createButton({}, 'test selected');
    allButton.addEventListener('click', function() {
      var promiseFactories = [];
      for (var i = 0; i < options.tests.length; i++) {
        var checkbox = document.getElementById('testcheck' + i);
        if (checkbox.checked) {
          var test = options.tests[i];
          promiseFactories.push({
            factory: function(context) { return doTest(context.test, context.idx); },
            context: {test: test, idx: i}
          });
        }
      }
      serailPromise(promiseFactories);
    });
    options.targetContainer.appendChild(allButton);

    var ul = createUl();
    options.targetContainer.appendChild(ul);

    for (var i = 0; i < options.tests.length; i++) {
      buildTestItemUI(ul, options.tests[i], i);
    }
  };

  function buildTestItemUI(ul, testItem, idx) {
    var li = createLi({'id': 'test' + idx});

    var button = createButton({'id': 'buttontest' + idx}, 'begin test');
    buildButtonClickHandler(button);

    var title = createTextNode(options.tests[idx].title);
    var checkbox = createCheckbox({'id': 'testcheck' + idx}, true);
    var label = createLabel({'id': 'label' + idx});

    li.appendChild(checkbox);
    li.appendChild(title);
    li.appendChild(button);
    li.appendChild(label);

    ul.appendChild(li);
  }

  function processTestResult(test, result, id) {
    var split = result.displayText.split('\n');
    options.jsonResult[test.title] = result.rawData;
    options.jsonContainer.innerHTML =
        '<div style="display:none">' + JSON.stringify(options.jsonResult) + '</div>';

    var summary = result.summary;
    var row = options.resultsContainer.insertRow();
    var cell = row.insertCell();
    cell.innerHTML = test.title;
    cell.rowSpan = Object.keys(summary).length;
    var idx = 0;
    Object.keys(summary).forEach(function(key) {
      var tableRow = row;
      if (idx !== 0) {
        tableRow = options.resultsContainer.insertRow();
      }
      var keyCell = tableRow.insertCell();
      keyCell.innerHTML = key;
      var valueCell = tableRow.insertCell();
      valueCell.innerHTML = summary[key];
      idx++;
    });

    var testLi = document.getElementById('test' + id);
    for (var j = 0; j < split.length; j++) {
      var br = document.createElement('br');
      var s = document.createTextNode(split[j]);
      testLi.appendChild(br);
      testLi.appendChild(s);
    }
  }

  function doTest(test, id) {
    test.cleanFn();
    test.before();
    var button = document.getElementById('buttontest' + id);
    button.setAttribute('enabled', 'false');
    var label = document.getElementById('label' + id);
    label.innerHTML = 'Testing';
    return test.testFn().then(function(result) {
      processTestResult(test, result, id);
      test.after();
      label.innerHTML = 'Finished';
      button.setAttribute('enabled', 'true');
    });
  }

  function buildButtonClickHandler(button) {
    button.onclick = function(event) {
      var target = event.target;
      var id = target.getAttribute('id').substring(10);
      var test = options.tests[id];
      doTest(test, id);
    };
  }
}(typeof window === 'undefined' ? global : window));