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@license
Copyright (C) 2019 The Android Open Source Project

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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limitations under the License.
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<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
<title>gr-admin-api</title>

<script src="/bower_components/webcomponentsjs/custom-elements-es5-adapter.js"></script>

<script src="/bower_components/webcomponentsjs/webcomponents-lite.js"></script>
<script src="/bower_components/web-component-tester/browser.js"></script>
<script src="../../../test/test-pre-setup.js"></script>
<link rel="import" href="../../../test/common-test-setup.html"/>
<link rel="import" href="../../shared/gr-js-api-interface/gr-js-api-interface.html">
<link rel="import" href="gr-styles-api.html">

<script>void(0);</script>

<dom-module id="gr-style-test-element">
  <template>
    <div id="wrapper"></div>
  </template>
  <script>
    readyToTest().then(() => {
      Polymer({is: 'gr-style-test-element'});
    });
  </script>
</dom-module>

<script>
  suite('gr-styles-api tests', async () => {
    await readyToTest();
    let sandbox;
    let stylesApi;

    setup(() => {
      sandbox = sinon.sandbox.create();
      let plugin;
      Gerrit.install(p => { plugin = p; }, '0.1',
          'http://test.com/plugins/testplugin/static/test.js');
      Gerrit._loadPlugins([]);
      stylesApi = plugin.styles();
    });

    teardown(() => {
      stylesApi = null;
      sandbox.restore();
    });

    test('exists', () => {
      assert.isOk(stylesApi);
    });

    test('css', () => {
      const styleObject = stylesApi.css('background: red');
      assert.isDefined(styleObject);
    });

    suite('GrStyleObject tests', () => {
      let sandbox;
      let stylesApi;
      let displayInlineStyle;
      let displayNoneStyle;

      setup(() => {
        sandbox = sinon.sandbox.create();
        let plugin;
        Gerrit.install(p => { plugin = p; }, '0.1',
            'http://test.com/plugins/testplugin/static/test.js');
        Gerrit._loadPlugins([]);
        stylesApi = plugin.styles();
        displayInlineStyle = stylesApi.css('display: inline');
        displayNoneStyle = stylesApi.css('display: none');
      });

      teardown(() => {
        displayInlineStyle = null;
        displayNoneStyle = null;
        stylesApi = null;
        sandbox.restore();
      });

      function createNestedElements(parentElement) {
        /* parentElement
        *  |--- element1
        *  |--- element2
        *       |--- element3
        **/
        const element1 = document.createElement('div');
        const element2 = document.createElement('div');
        const element3 = document.createElement('div');
        Polymer.dom(parentElement).appendChild(element1);
        Polymer.dom(parentElement).appendChild(element2);
        Polymer.dom(element2).appendChild(element3);

        return [element1, element2, element3];
      }

      test('getClassName  - body level elements', () => {
        const bodyLevelElements = createNestedElements(document.body);

        testGetClassName(bodyLevelElements);
      });

      test('getClassName  - elements inside polymer element', () => {
        const polymerElement = document.createElement('gr-style-test-element');
        Polymer.dom(document.body).appendChild(polymerElement);
        const contentElements = createNestedElements(polymerElement.$.wrapper);

        testGetClassName(contentElements);
      });

      function testGetClassName(elements) {
        assertAllElementsHaveDefaultStyle(elements);

        const className1 = displayInlineStyle.getClassName(elements[0]);
        const className2 = displayNoneStyle.getClassName(elements[1]);
        const className3 = displayInlineStyle.getClassName(elements[2]);

        assert.notEqual(className2, className1);
        assert.equal(className3, className1);

        assertAllElementsHaveDefaultStyle(elements);

        elements[0].classList.add(className1);
        elements[1].classList.add(className2);
        elements[2].classList.add(className1);

        assertDisplayPropertyValues(elements, ['inline', 'none', 'inline']);
      }

      test('apply - body level elements', () => {
        const bodyLevelElements = createNestedElements(document.body);

        testApply(bodyLevelElements);
      });

      test('apply - elements inside polymer element', () => {
        const polymerElement = document.createElement('gr-style-test-element');
        Polymer.dom(document.body).appendChild(polymerElement);
        const contentElements = createNestedElements(polymerElement.$.wrapper);

        testApply(contentElements);
      });

      function testApply(elements) {
        assertAllElementsHaveDefaultStyle(elements);
        displayInlineStyle.apply(elements[0]);
        displayNoneStyle.apply(elements[1]);
        displayInlineStyle.apply(elements[2]);
        assertDisplayPropertyValues(elements, ['inline', 'none', 'inline']);
      }

      function assertAllElementsHaveDefaultStyle(elements) {
        for (const element of elements) {
          assert.equal(getComputedStyle(element).getPropertyValue('display'),
              'block');
        }
      }

      function assertDisplayPropertyValues(elements, expectedDisplayValues) {
        for (const key in elements) {
          if (elements.hasOwnProperty(key)) {
            assert.equal(
                getComputedStyle(elements[key]).getPropertyValue('display'),
                expectedDisplayValues[key]);
          }
        }
      }
    });
  });
</script>