/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @unrestricted
 */
DataGrid.ShowMoreDataGridNode = class extends DataGrid.DataGridNode {
  /**
   * @param {function(number, number)} callback
   * @param {number} startPosition
   * @param {number} endPosition
   * @param {number} chunkSize
   */
  constructor(callback, startPosition, endPosition, chunkSize) {
    super({summaryRow: true}, false);
    this._callback = callback;
    this._startPosition = startPosition;
    this._endPosition = endPosition;
    this._chunkSize = chunkSize;

    this.showNext = createElement('button');
    this.showNext.setAttribute('type', 'button');
    this.showNext.addEventListener('click', this._showNextChunk.bind(this), false);
    this.showNext.textContent = Common.UIString('Show %d before', this._chunkSize);

    this.showAll = createElement('button');
    this.showAll.setAttribute('type', 'button');
    this.showAll.addEventListener('click', this._showAll.bind(this), false);

    this.showLast = createElement('button');
    this.showLast.setAttribute('type', 'button');
    this.showLast.addEventListener('click', this._showLastChunk.bind(this), false);
    this.showLast.textContent = Common.UIString('Show %d after', this._chunkSize);

    this._updateLabels();
    this.selectable = false;
  }

  _showNextChunk() {
    this._callback(this._startPosition, this._startPosition + this._chunkSize);
  }

  _showAll() {
    this._callback(this._startPosition, this._endPosition);
  }

  _showLastChunk() {
    this._callback(this._endPosition - this._chunkSize, this._endPosition);
  }

  _updateLabels() {
    const totalSize = this._endPosition - this._startPosition;
    if (totalSize > this._chunkSize) {
      this.showNext.classList.remove('hidden');
      this.showLast.classList.remove('hidden');
    } else {
      this.showNext.classList.add('hidden');
      this.showLast.classList.add('hidden');
    }
    this.showAll.textContent = Common.UIString('Show all %d', totalSize);
  }

  /**
   * @override
   * @param {!Element} element
   */
  createCells(element) {
    this._hasCells = false;
    super.createCells(element);
  }

  /**
   * @override
   * @param {string} columnIdentifier
   * @return {!Element}
   */
  createCell(columnIdentifier) {
    const cell = this.createTD(columnIdentifier);
    if (!this._hasCells) {
      this._hasCells = true;
      if (this.depth)
        cell.style.setProperty('padding-left', (this.depth * this.dataGrid.indentWidth) + 'px');
      cell.appendChild(this.showNext);
      cell.appendChild(this.showAll);
      cell.appendChild(this.showLast);
    }
    return cell;
  }

  /**
   * @param {number} from
   */
  setStartPosition(from) {
    this._startPosition = from;
    this._updateLabels();
  }

  /**
   * @param {number} to
   */
  setEndPosition(to) {
    this._endPosition = to;
    this._updateLabels();
  }

  /**
   * @override
   * @return {number}
   */
  nodeSelfHeight() {
    return 40;
  }

  dispose() {
  }
};