import {createCommentApiMockWithTemplateElement} from '../../../test/mocks/comment-api';
/**
 * @license
 * Copyright (C) 2016 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import '../../../test/common-test-setup-karma.js';
import '../../diff/gr-comment-api/gr-comment-api.js';
import './gr-messages-list.js';
import '../../../test/mocks/comment-api.js';
import {dom} from '@polymer/polymer/lib/legacy/polymer.dom.js';
import {html} from '@polymer/polymer/lib/utils/html-tag.js';

createCommentApiMockWithTemplateElement(
    'gr-messages-list-comment-mock-api', html`
     <gr-messages-list
         id="messagesList"
         change-comments="[[_changeComments]]"></gr-messages-list>
     <gr-comment-api id="commentAPI"></gr-comment-api>
`);

const basicFixture = fixtureFromTemplate(html`
<gr-messages-list-comment-mock-api>
  <gr-messages-list></gr-messages-list>
</gr-messages-list-comment-mock-api>
`);

const randomMessage = function(opt_params) {
  const params = opt_params || {};
  const author1 = {
    _account_id: 1115495,
    name: 'Andrew Bonventre',
    email: 'andybons@chromium.org',
  };
  return {
    id: params.id || Math.random().toString(),
    date: params.date || '2016-01-12 20:28:33.038000',
    message: params.message || Math.random().toString(),
    _revision_number: params._revision_number || 1,
    author: params.author || author1,
  };
};

const randomAutomated = function(opt_params) {
  return Object.assign({tag: 'autogenerated:gerrit:replace'},
      randomMessage(opt_params));
};

function generateRandomMessages(count) {
  return new Array(count).fill()
      .map(() => randomMessage());
}

function generateRandomAutomatedMessages(count) {
  return new Array(count).fill()
      .map(() => randomAutomated());
}

// Returns a shuffled copy of array
export function shuffle(arr) {
  const result = [];
  for (const item of arr) {
    // Random number in the interval [0..array.length]
    const j = Math.floor(Math.random() * (arr.length + 1));
    if (j < result.length) {
      result.push(result[j]);
      result[j] = item;
    } else {
      result.push(item);
    }
  }
  return result;
}

suite('gr-messages-list tests', () => {
  let element;
  let messages;

  let commentApiWrapper;

  const getMessages = function() {
    return dom(element.root).querySelectorAll('gr-message');
  };

  const author = {
    _account_id: 42,
    name: 'Marvin the Paranoid Android',
    email: 'marvin@sirius.org',
  };

  const comments = {
    file1: [
      {
        message: 'message text',
        updated: '2016-09-27 00:18:03.000000000',
        in_reply_to: '6505d749_f0bec0aa',
        line: 62,
        id: '6505d749_10ed44b2',
        patch_set: 2,
        author: {
          email: 'some@email.com',
          _account_id: 123,
        },
      },
      {
        message: 'message text',
        updated: '2016-09-27 00:18:03.000000000',
        in_reply_to: 'c5912363_6b820105',
        line: 42,
        id: '450a935e_0f1c05db',
        patch_set: 2,
        author,
      },
      {
        message: 'message text',
        updated: '2016-09-27 00:18:03.000000000',
        in_reply_to: '6505d749_f0bec0aa',
        line: 62,
        id: '6505d749_10ed44b2',
        patch_set: 2,
        author,
      },
    ],
    file2: [
      {
        message: 'message text',
        updated: '2016-09-27 00:18:03.000000000',
        in_reply_to: 'c5912363_4b7d450a',
        line: 132,
        id: '450a935e_4f260d25',
        patch_set: 2,
        author,
      },
    ],
  };

  suite('basic tests', () => {
    setup(() => {
      stub('gr-rest-api-interface', {
        getConfig() { return Promise.resolve({}); },
        getLoggedIn() { return Promise.resolve(false); },
        getDiffComments() { return Promise.resolve(comments); },
        getDiffRobotComments() { return Promise.resolve({}); },
        getDiffDrafts() { return Promise.resolve({}); },
      });

      messages = generateRandomMessages(3);
      // Element must be wrapped in an element with direct access to the
      // comment API.
      commentApiWrapper = basicFixture.instantiate();
      element = commentApiWrapper.$.messagesList;
      element.messages = messages;

      // Stub methods on the changeComments object after changeComments has
      // been initialized.
      return commentApiWrapper.loadComments();
    });

    test('show some old messages', () => {
      assert.isTrue(element.$.messageControlsContainer.hasAttribute('hidden'));
      element.messages = generateRandomMessages(26);
      flushAsynchronousOperations();

      assert.isFalse(element.$.messageControlsContainer.hasAttribute('hidden'));
      assert.equal(getMessages().length, 20);
      assert.equal(element.$.incrementMessagesBtn.innerText.toUpperCase()
          .trim(), 'SHOW 5 MORE');
      MockInteractions.tap(element.$.incrementMessagesBtn);
      flushAsynchronousOperations();

      assert.equal(getMessages().length, 25);
      assert.equal(element.$.incrementMessagesBtn.innerText.toUpperCase()
          .trim(), 'SHOW 1 MORE');
      MockInteractions.tap(element.$.incrementMessagesBtn);
      flushAsynchronousOperations();

      assert.isTrue(element.$.messageControlsContainer.hasAttribute('hidden'));
      assert.equal(getMessages().length, 26);
    });

    test('show all old messages', () => {
      assert.isTrue(element.$.messageControlsContainer.hasAttribute('hidden'));
      element.messages = generateRandomMessages(26);
      flushAsynchronousOperations();

      assert.isFalse(element.$.messageControlsContainer.hasAttribute('hidden'));
      assert.equal(getMessages().length, 20);
      assert.equal(element.$.oldMessagesBtn.innerText.toUpperCase(),
          'SHOW ALL 6 MESSAGES');
      MockInteractions.tap(element.$.oldMessagesBtn);
      flushAsynchronousOperations();

      assert.equal(getMessages().length, 26);
      assert.isTrue(element.$.messageControlsContainer.hasAttribute('hidden'));
    });

    test('message count respects automated', () => {
      element.messages = generateRandomAutomatedMessages(10)
          .concat(generateRandomMessages(11));
      flushAsynchronousOperations();

      assert.equal(element.$.oldMessagesBtn.innerText.toUpperCase(),
          'SHOW 1 MESSAGE');
      assert.isFalse(element.$.messageControlsContainer.hasAttribute('hidden'));
      MockInteractions.tap(element.$.automatedMessageToggle);
      flushAsynchronousOperations();

      assert.isTrue(element.$.messageControlsContainer.hasAttribute('hidden'));
    });

    test('message count still respects non-automated on toggle', () => {
      element.messages = generateRandomMessages(10)
          .concat(generateRandomAutomatedMessages(11));
      flushAsynchronousOperations();

      assert.equal(element.$.oldMessagesBtn.innerText.toUpperCase(),
          'SHOW 1 MESSAGE');
      assert.isFalse(element.$.messageControlsContainer.hasAttribute('hidden'));
      MockInteractions.tap(element.$.automatedMessageToggle);
      flushAsynchronousOperations();

      assert.equal(element.$.oldMessagesBtn.innerText.toUpperCase(),
          'SHOW 1 MESSAGE');
      assert.isFalse(element.$.messageControlsContainer.hasAttribute('hidden'));
    });

    test('show all messages respects expand', () => {
      element.messages = generateRandomAutomatedMessages(10)
          .concat(generateRandomMessages(11));
      flushAsynchronousOperations();

      MockInteractions.tap(element.shadowRoot
          .querySelector('#collapse-messages')); // Expand all.
      flushAsynchronousOperations();

      let messages = getMessages();
      assert.equal(messages.length, 20);
      for (const message of messages) {
        assert.isTrue(message._expanded);
      }

      MockInteractions.tap(element.$.oldMessagesBtn);
      flushAsynchronousOperations();

      messages = getMessages();
      assert.equal(messages.length, 21);
      for (const message of messages) {
        assert.isTrue(message._expanded);
      }
    });

    test('show all messages respects collapse', () => {
      element.messages = generateRandomAutomatedMessages(10)
          .concat(generateRandomMessages(11));
      flushAsynchronousOperations();

      MockInteractions.tap(element.shadowRoot
          .querySelector('#collapse-messages')); // Expand all.
      MockInteractions.tap(element.shadowRoot
          .querySelector('#collapse-messages')); // Collapse all.
      flushAsynchronousOperations();

      let messages = getMessages();
      assert.equal(messages.length, 20);
      for (const message of messages) {
        assert.isFalse(message._expanded);
      }

      MockInteractions.tap(element.$.oldMessagesBtn);
      flushAsynchronousOperations();

      messages = getMessages();
      assert.equal(messages.length, 21);
      for (const message of messages) {
        assert.isFalse(message._expanded);
      }
    });

    test('expand/collapse all', () => {
      let allMessageEls = getMessages();
      for (const message of allMessageEls) {
        message._expanded = false;
      }
      MockInteractions.tap(allMessageEls[1]);
      assert.isTrue(allMessageEls[1]._expanded);

      MockInteractions.tap(element.shadowRoot
          .querySelector('#collapse-messages'));
      allMessageEls = getMessages();
      for (const message of allMessageEls) {
        assert.isTrue(message._expanded);
      }

      MockInteractions.tap(element.shadowRoot
          .querySelector('#collapse-messages'));
      allMessageEls = getMessages();
      for (const message of allMessageEls) {
        assert.isFalse(message._expanded);
      }
    });

    test('expand/collapse from external keypress', () => {
      // Start with one expanded message. -> not all collapsed
      element.scrollToMessage(messages[1].id);
      assert.isFalse([...getMessages()].filter(m => m._expanded).length == 0);

      // Press 'z' -> all collapsed
      element.handleExpandCollapse(false);
      assert.isTrue([...getMessages()].filter(m => m._expanded).length == 0);

      // Press 'x' -> all expanded
      element.handleExpandCollapse(true);
      assert.isTrue([...getMessages()].filter(m => !m._expanded).length == 0);

      // Press 'z' -> all collapsed
      element.handleExpandCollapse(false);
      assert.isTrue([...getMessages()].filter(m => m._expanded).length == 0);
    });

    test('hide messages does not appear when no automated messages', () => {
      assert.isOk(element.shadowRoot
          .querySelector('#automatedMessageToggleContainer[hidden]'));
    });

    test('scroll to message', () => {
      const allMessageEls = getMessages();
      for (const message of allMessageEls) {
        message.set('message.expanded', false);
      }

      const scrollToStub = sinon.stub(window, 'scrollTo');
      const highlightStub = sinon.stub(element, '_highlightEl');

      element.scrollToMessage('invalid');

      for (const message of allMessageEls) {
        assert.isFalse(message._expanded,
            'expected gr-message to not be expanded');
      }

      const messageID = messages[1].id;
      element.scrollToMessage(messageID);
      assert.isTrue(
          element.shadowRoot
              .querySelector('[data-message-id="' + messageID + '"]')
              ._expanded);

      assert.isTrue(scrollToStub.calledOnce);
      assert.isTrue(highlightStub.calledOnce);
    });

    test('scroll to message offscreen', () => {
      const scrollToStub = sinon.stub(window, 'scrollTo');
      const highlightStub = sinon.stub(element, '_highlightEl');
      element.messages = generateRandomMessages(25);
      flushAsynchronousOperations();
      assert.isFalse(scrollToStub.called);
      assert.isFalse(highlightStub.called);

      const messageID = element.messages[1].id;
      element.scrollToMessage(messageID);
      assert.isTrue(scrollToStub.calledOnce);
      assert.isTrue(highlightStub.calledOnce);
      assert.equal(element._visibleMessages.length, 24);
      assert.isTrue(
          element.shadowRoot
              .querySelector('[data-message-id="' + messageID + '"]')
              ._expanded);
    });

    test('messages', () => {
      const messages = [].concat(
          randomMessage(),
          {
            _index: 5,
            _revision_number: 4,
            message: 'Uploaded patch set 4.',
            date: '2016-09-28 13:36:33.000000000',
            author,
            id: '8c19ccc949c6d482b061be6a28e10782abf0e7af',
          },
          {
            _index: 6,
            _revision_number: 4,
            message: 'Patch Set 4:\n\n(6 comments)',
            date: '2016-09-28 13:36:33.000000000',
            author,
            id: 'e7bfdbc842f6b6d8064bc68e0f52b673f40c0ca5',
          }
      );
      element.messages = messages;
      const isAuthor = function(author, message) {
        return message.author._account_id === author._account_id;
      };
      const isMarvin = isAuthor.bind(null, author);
      flushAsynchronousOperations();
      const messageElements = getMessages();
      assert.equal(messageElements.length, messages.length);
      assert.deepEqual(messageElements[1].message, messages[1]);
      assert.deepEqual(messageElements[2].message, messages[2]);
      assert.deepEqual(messageElements[1].comments.file1,
          comments.file1.filter(isMarvin).map(c => {
            return {...c,
              path: 'file1'};
          }));
      assert.deepEqual(messageElements[1].comments.file2,
          comments.file2.filter(isMarvin).map(c => {
            return {...c,
              path: 'file2'};
          }));
      assert.deepEqual(messageElements[2].comments, {});
    });

    test('messages without author do not throw', () => {
      const messages = [{
        _index: 5,
        _revision_number: 4,
        message: 'Uploaded patch set 4.',
        date: '2016-09-28 13:36:33.000000000',
        id: '8c19ccc949c6d482b061be6a28e10782abf0e7af',
      }];
      element.messages = messages;
      flushAsynchronousOperations();
      const messageEls = getMessages();
      assert.equal(messageEls.length, 1);
      assert.equal(messageEls[0].message.message, messages[0].message);
    });

    test('hide increment text if increment >= total remaining', () => {
      // Test with stubbed return values, as _numRemaining and _getDelta have
      // their own tests.
      sinon.stub(element, '_getDelta').returns(5);
      const remainingStub = sinon.stub(element, '_numRemaining').returns(6);
      assert.isFalse(element._computeIncrementHidden(null, null, null));
      remainingStub.restore();

      sinon.stub(element, '_numRemaining').returns(4);
      assert.isTrue(element._computeIncrementHidden(null, null, null));
    });
  });

  suite('gr-messages-list automate tests', () => {
    let element;
    let messages;

    let commentApiWrapper;

    const getMessages = function() {
      return dom(element.root).querySelectorAll('gr-message');
    };
    const getHiddenMessages = function() {
      return dom(element.root).querySelectorAll('gr-message[hidden]');
    };

    const randomMessageReviewer = {
      reviewer: {},
      date: '2016-01-13 20:30:33.038000',
    };

    setup(() => {
      stub('gr-rest-api-interface', {
        getConfig() { return Promise.resolve({}); },
        getLoggedIn() { return Promise.resolve(false); },
        getDiffComments() { return Promise.resolve({}); },
        getDiffRobotComments() { return Promise.resolve({}); },
        getDiffDrafts() { return Promise.resolve({}); },
      });

      messages = generateRandomAutomatedMessages(2);
      messages.push(randomMessageReviewer);

      // Element must be wrapped in an element with direct access to the
      // comment API.
      commentApiWrapper = basicFixture.instantiate();
      element = commentApiWrapper.$.messagesList;
      sinon.spy(commentApiWrapper.$.commentAPI, 'loadAll');
      element.messages = messages;

      // Stub methods on the changeComments object after changeComments has
      // been initialized.
      return commentApiWrapper.loadComments();
    });

    test('hide autogenerated button is not hidden', () => {
      assert.isNotOk(element.shadowRoot
          .querySelector('#automatedMessageToggle[hidden]'));
    });

    test('autogenerated messages are not hidden initially', () => {
      const allHiddenMessageEls = getHiddenMessages();

      // There are no hidden messages.
      assert.isFalse(!!allHiddenMessageEls.length);
    });

    test('autogenerated messages hidden after comments only toggle', () => {
      let allHiddenMessageEls = getHiddenMessages();

      element._hideAutomated = false;
      MockInteractions.tap(element.$.automatedMessageToggle);
      flushAsynchronousOperations();
      const allMessageEls = getMessages();
      allHiddenMessageEls = getHiddenMessages();

      // Autogenerated messages are now hidden.
      assert.equal(allHiddenMessageEls.length, allMessageEls.length);
    });

    test('autogenerated messages not hidden after comments only toggle',
        () => {
          let allHiddenMessageEls = getHiddenMessages();

          element._hideAutomated = true;
          MockInteractions.tap(element.$.automatedMessageToggle);
          allHiddenMessageEls = getHiddenMessages();

          // Autogenerated messages are now hidden.
          assert.isFalse(!!allHiddenMessageEls.length);
        });

    test('_getDelta', () => {
      let messages = [randomMessage()];
      assert.equal(element._getDelta([], messages, false), 1);
      assert.equal(element._getDelta([], messages, true), 1);

      messages = generateRandomMessages(7);
      assert.equal(element._getDelta([], messages, false), 5);
      assert.equal(element._getDelta([], messages, true), 5);

      messages = generateRandomMessages(4)
          .concat(generateRandomAutomatedMessages(2))
          .concat(generateRandomMessages(3));

      const dummyArr = generateRandomMessages(2);
      assert.equal(element._getDelta(dummyArr, messages, false), 5);
      assert.equal(element._getDelta(dummyArr, messages, true), 7);
    });

    test('_getHumanMessages', () => {
      assert.equal(
          element._getHumanMessages(
              generateRandomAutomatedMessages(5)).length, 0);
      assert.equal(
          element._getHumanMessages(generateRandomMessages(5)).length, 5);

      let messages = shuffle(generateRandomMessages(5)
          .concat(generateRandomAutomatedMessages(5)));
      messages = element._getHumanMessages(messages);
      assert.equal(messages.length, 5);
      assert.isFalse(element._hasAutomatedMessages(messages));
    });

    test('initially show only 20 messages', () => {
      sinon.stub(element.reporting, 'reportInteraction').callsFake(
          (eventName, details) => {
            assert.equal(typeof(eventName), 'string');
            if (details) {
              assert.equal(typeof(details), 'object');
            }
          });
      const messages = Array.from(Array(23).keys())
          .map(() => {
            return {};
          });
      element._processedMessagesChanged(messages);

      assert.equal(element._visibleMessages.length, 20);
    });

    test('_computeLabelExtremes', () => {
      const computeSpy = sinon.spy(element, '_computeLabelExtremes');

      element.labels = null;
      assert.isTrue(computeSpy.calledOnce);
      assert.deepEqual(computeSpy.lastCall.returnValue, {});

      element.labels = {};
      assert.isTrue(computeSpy.calledTwice);
      assert.deepEqual(computeSpy.lastCall.returnValue, {});

      element.labels = {'my-label': {}};
      assert.isTrue(computeSpy.calledThrice);
      assert.deepEqual(computeSpy.lastCall.returnValue, {});

      element.labels = {'my-label': {values: {}}};
      assert.equal(computeSpy.callCount, 4);
      assert.deepEqual(computeSpy.lastCall.returnValue, {});

      element.labels = {'my-label': {values: {'-12': {}}}};
      assert.equal(computeSpy.callCount, 5);
      assert.deepEqual(computeSpy.lastCall.returnValue,
          {'my-label': {min: -12, max: -12}});

      element.labels = {
        'my-label': {values: {'-2': {}, '-1': {}, '0': {}, '+1': {}, '+2': {}}},
      };
      assert.equal(computeSpy.callCount, 6);
      assert.deepEqual(computeSpy.lastCall.returnValue,
          {'my-label': {min: -2, max: 2}});

      element.labels = {
        'my-label': {values: {'-12': {}}},
        'other-label': {values: {'-1': {}, ' 0': {}, '+1': {}}},
      };
      assert.equal(computeSpy.callCount, 7);
      assert.deepEqual(computeSpy.lastCall.returnValue, {
        'my-label': {min: -12, max: -12},
        'other-label': {min: -1, max: 1},
      });
    });
  });
});