// 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.
(function() {
  'use strict';

  const COMMIT_MESSAGE_PATH = '/COMMIT_MSG';
  const MERGE_LIST_PATH = '/MERGE_LIST';

  Polymer({
    is: 'gr-comment-list',

    behaviors: [
      Gerrit.BaseUrlBehavior,
      Gerrit.PathListBehavior,
      Gerrit.URLEncodingBehavior,
    ],

    properties: {
      changeNum: Number,
      comments: Object,
      patchNum: Number,
      commentLinks: Object,
      projectName: String,
    },

    _computeFilesFromComments(comments) {
      const arr = Object.keys(comments || {});
      return arr.sort(this.specialFilePathCompare);
    },

    _computeFileDiffURL(file, changeNum, patchNum) {
      return Gerrit.Nav.getUrlForDiffById(this.changeNum, this.projectName,
          file, patchNum);
    },

    _computeFileDisplayName(path) {
      if (path === COMMIT_MESSAGE_PATH) {
        return 'Commit message';
      } else if (path === MERGE_LIST_PATH) {
        return 'Merge list';
      }
      return path;
    },

    _isOnParent(comment) {
      return comment.side === 'PARENT';
    },

    _computeDiffLineURL(file, changeNum, patchNum, comment) {
      return Gerrit.Nav.getUrlForDiffById(this.changeNum, this.projectName,
          file, patchNum, null, comment.line, this._isOnParent(comment));
    },

    _computeCommentsForFile(comments, file) {
      // Changes are not picked up by the dom-repeat due to the array instance
      // identity not changing even when it has elements added/removed from it.
      return (comments[file] || []).slice();
    },

    _computePatchDisplayName(comment) {
      if (this._isOnParent(comment)) {
        return 'Base, ';
      }
      if (comment.patch_set != this.patchNum) {
        return `PS${comment.patch_set}, `;
      }
      return '';
    },
  });
})();