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

  const SUGGESTIONS_LIMIT = 15;

  Polymer({
    is: 'gr-confirm-cherrypick-dialog',

    /**
     * Fired when the confirm button is pressed.
     *
     * @event confirm
     */

    /**
     * Fired when the cancel button is pressed.
     *
     * @event cancel
     */

    properties: {
      branch: String,
      baseCommit: String,
      changeStatus: String,
      commitMessage: String,
      commitNum: String,
      message: String,
      project: String,
      _query: {
        type: Function,
        value() {
          return this._getProjectBranchesSuggestions.bind(this);
        },
      },
    },

    behaviors: [
      Gerrit.FireBehavior,
    ],

    observers: [
      '_computeMessage(changeStatus, commitNum, commitMessage)',
    ],

    _computeMessage(changeStatus, commitNum, commitMessage) {
      // Polymer 2: check for undefined
      if ([
        changeStatus,
        commitNum,
        commitMessage,
      ].some(arg => arg === undefined)) {
        return;
      }

      let newMessage = commitMessage;

      if (changeStatus === 'MERGED') {
        newMessage += '(cherry picked from commit ' + commitNum + ')';
      }
      this.message = newMessage;
    },

    _handleConfirmTap(e) {
      e.preventDefault();
      e.stopPropagation();
      this.fire('confirm', null, {bubbles: false});
    },

    _handleCancelTap(e) {
      e.preventDefault();
      e.stopPropagation();
      this.fire('cancel', null, {bubbles: false});
    },

    resetFocus() {
      this.$.branchInput.focus();
    },

    _getProjectBranchesSuggestions(input) {
      if (input.startsWith('refs/heads/')) {
        input = input.substring('refs/heads/'.length);
      }
      return this.$.restAPI.getRepoBranches(
          input, this.project, SUGGESTIONS_LIMIT).then(response => {
            const branches = [];
            let branch;
            for (const key in response) {
              if (!response.hasOwnProperty(key)) { continue; }
              if (response[key].ref.startsWith('refs/heads/')) {
                branch = response[key].ref.substring('refs/heads/'.length);
              } else {
                branch = response[key].ref;
              }
              branches.push({
                name: branch,
              });
            }
            return branches;
          });
    },
  });
})();