// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
 * @unrestricted
 */
export default class EventSourceMessagesView extends UI.VBox {
  /**
   * @param {!SDK.NetworkRequest} request
   */
  constructor(request) {
    super();
    this.registerRequiredCSS('network/eventSourceMessagesView.css');
    this.element.classList.add('event-source-messages-view');
    this._request = request;

    const columns = /** @type {!Array<!DataGrid.DataGrid.ColumnDescriptor>} */ ([
      {id: 'id', title: Common.UIString('Id'), sortable: true, weight: 8},
      {id: 'type', title: Common.UIString('Type'), sortable: true, weight: 8},
      {id: 'data', title: Common.UIString('Data'), sortable: false, weight: 88},
      {id: 'time', title: Common.UIString('Time'), sortable: true, weight: 8}
    ]);

    this._dataGrid = new DataGrid.SortableDataGrid(columns);
    this._dataGrid.setStriped(true);
    this._dataGrid.setStickToBottom(true);
    this._dataGrid.markColumnAsSortedBy('time', DataGrid.DataGrid.Order.Ascending);
    this._sortItems();
    this._dataGrid.addEventListener(DataGrid.DataGrid.Events.SortingChanged, this._sortItems, this);

    this._dataGrid.setName('EventSourceMessagesView');
    this._dataGrid.asWidget().show(this.element);
  }

  /**
   * @override
   */
  wasShown() {
    this._dataGrid.rootNode().removeChildren();
    const messages = this._request.eventSourceMessages();
    for (let i = 0; i < messages.length; ++i) {
      this._dataGrid.insertChild(new EventSourceMessageNode(messages[i]));
    }

    this._request.addEventListener(SDK.NetworkRequest.Events.EventSourceMessageAdded, this._messageAdded, this);
  }

  /**
   * @override
   */
  willHide() {
    this._request.removeEventListener(SDK.NetworkRequest.Events.EventSourceMessageAdded, this._messageAdded, this);
  }

  /**
   * @param {!Common.Event} event
   */
  _messageAdded(event) {
    const message = /** @type {!SDK.NetworkRequest.EventSourceMessage} */ (event.data);
    this._dataGrid.insertChild(new EventSourceMessageNode(message));
  }

  _sortItems() {
    const sortColumnId = this._dataGrid.sortColumnId();
    if (!sortColumnId) {
      return;
    }
    const comparator = Comparators[sortColumnId];
    if (!comparator) {
      return;
    }
    this._dataGrid.sortNodes(comparator, !this._dataGrid.isSortOrderAscending());
  }
}

/**
 * @unrestricted
 */
export class EventSourceMessageNode extends DataGrid.SortableDataGridNode {
  /**
   * @param {!SDK.NetworkRequest.EventSourceMessage} message
   */
  constructor(message) {
    const time = new Date(message.time * 1000);
    const timeText = ('0' + time.getHours()).substr(-2) + ':' + ('0' + time.getMinutes()).substr(-2) + ':' +
        ('0' + time.getSeconds()).substr(-2) + '.' + ('00' + time.getMilliseconds()).substr(-3);
    const timeNode = createElement('div');
    timeNode.createTextChild(timeText);
    timeNode.title = time.toLocaleString();
    super({id: message.eventId, type: message.eventName, data: message.data, time: timeNode});
    this._message = message;
  }
}

/**
 * @param {string} field
 * @param {!EventSourceMessageNode} a
 * @param {!EventSourceMessageNode} b
 * @return {number}
 */
export function EventSourceMessageNodeComparator(field, a, b) {
  const aValue = a._message[field];
  const bValue = b._message[field];
  return aValue < bValue ? -1 : aValue > bValue ? 1 : 0;
}

/** @type {!Object.<string, function(!EventSourceMessageNode, !EventSourceMessageNode):number>} */
export const Comparators = {
  'id': EventSourceMessageNodeComparator.bind(null, 'eventId'),
  'type': EventSourceMessageNodeComparator.bind(null, 'eventName'),
  'time': EventSourceMessageNodeComparator.bind(null, 'time')
};

/* Legacy exported object */
self.Network = self.Network || {};

/* Legacy exported object */
Network = Network || {};

/**
 * @constructor
 */
Network.EventSourceMessagesView = EventSourceMessagesView;

Network.EventSourceMessageNodeComparator = EventSourceMessageNodeComparator;

/**
 * @constructor
 */
Network.EventSourceMessageNode = EventSourceMessageNode;

/** @type {!Object.<string, function(!EventSourceMessageNode, !EventSourceMessageNode):number>} */
Network.EventSourceMessageNode.Comparators = Comparators;