/**
 * @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 {BaseUrlBehavior} from '../base-url-behavior/base-url-behavior.js';
import {ChangeStatus} from '../../constants/constants.js';

/** @polymerBehavior Gerrit.RESTClientBehavior */
export const RESTClientBehavior = [{
  ChangeDiffType: {
    ADDED: 'ADDED',
    COPIED: 'COPIED',
    DELETED: 'DELETED',
    MODIFIED: 'MODIFIED',
    RENAMED: 'RENAMED',
    REWRITE: 'REWRITE',
  },

  // Must be kept in sync with the ListChangesOption enum and protobuf.
  ListChangesOption: {
    LABELS: 0,
    DETAILED_LABELS: 8,

    // Return information on the current patch set of the change.
    CURRENT_REVISION: 1,
    ALL_REVISIONS: 2,

    // If revisions are included, parse the commit object.
    CURRENT_COMMIT: 3,
    ALL_COMMITS: 4,

    // If a patch set is included, include the files of the patch set.
    CURRENT_FILES: 5,
    ALL_FILES: 6,

    // If accounts are included, include detailed account info.
    DETAILED_ACCOUNTS: 7,

    // Include messages associated with the change.
    MESSAGES: 9,

    // Include allowed actions client could perform.
    CURRENT_ACTIONS: 10,

    // Set the reviewed boolean for the caller.
    REVIEWED: 11,

    // Include download commands for the caller.
    DOWNLOAD_COMMANDS: 13,

    // Include patch set weblinks.
    WEB_LINKS: 14,

    // Include consistency check results.
    CHECK: 15,

    // Include allowed change actions client could perform.
    CHANGE_ACTIONS: 16,

    // Include a copy of commit messages including review footers.
    COMMIT_FOOTERS: 17,

    // Include push certificate information along with any patch sets.
    PUSH_CERTIFICATES: 18,

    // Include change's reviewer updates.
    REVIEWER_UPDATES: 19,

    // Set the submittable boolean.
    SUBMITTABLE: 20,

    // If tracking ids are included, include detailed tracking ids info.
    TRACKING_IDS: 21,

    // Skip mergeability data.
    SKIP_MERGEABLE: 22,

    /**
     * Skip diffstat computation that compute the insertions field (number of lines inserted) and
     * deletions field (number of lines deleted)
     */
    SKIP_DIFFSTAT: 23,
  },

  listChangesOptionsToHex(...args) {
    let v = 0;
    for (let i = 0; i < args.length; i++) {
      v |= 1 << args[i];
    }
    return v.toString(16);
  },

  /**
   *  @return {string}
   */
  changeBaseURL(project, changeNum, patchNum) {
    let v = this.getBaseUrl() + '/changes/' +
       encodeURIComponent(project) + '~' + changeNum;
    if (patchNum) {
      v += '/revisions/' + patchNum;
    }
    return v;
  },

  changePath(changeNum) {
    return this.getBaseUrl() + '/c/' + changeNum;
  },

  changeIsOpen(change) {
    return change && change.status === ChangeStatus.NEW;
  },

  /**
   * @param {!Object} change
   * @param {!Object=} opt_options
   *
   * @return {!Array}
   */
  changeStatuses(change, opt_options) {
    const states = [];
    if (change.status === ChangeStatus.MERGED) {
      states.push('Merged');
    } else if (change.status === ChangeStatus.ABANDONED) {
      states.push('Abandoned');
    } else if (change.mergeable === false ||
        (opt_options && opt_options.mergeable === false)) {
      // 'mergeable' prop may not always exist (@see Issue 6819)
      states.push('Merge Conflict');
    }
    if (change.work_in_progress) { states.push('WIP'); }
    if (change.is_private) { states.push('Private'); }

    // If there are any pre-defined statuses, only return those. Otherwise,
    // will determine the derived status.
    if (states.length || !opt_options) { return states; }

    // If no missing requirements, either active or ready to submit.
    if (change.submittable && opt_options.submitEnabled) {
      states.push('Ready to submit');
    } else {
      // Otherwise it is active.
      states.push('Active');
    }
    return states;
  },

  /**
   * @param {!Object} change
   * @return {string}
   */
  changeStatusString(change) {
    return this.changeStatuses(change).join(', ');
  },
},
BaseUrlBehavior,
];

// eslint-disable-next-line no-unused-vars
function defineEmptyMixin() {
  // This is a temporary function.
  // Polymer linter doesn't process correctly the following code:
  // class MyElement extends Polymer.mixinBehaviors([legacyBehaviors], ...) {...}
  // To workaround this issue, the mock mixin is declared in this method.
  // In the following changes, legacy behaviors will be converted to mixins.

  /**
   * @polymer
   * @mixinFunction
   */
  const RESTClientMixin = base => // eslint-disable-line no-unused-vars
    class extends base {
      changeStatusString(change) {}

      changeStatuses(change, opt_options) {}
    };
}

// TODO(dmfilippov) Remove the following lines with assignments
// Plugins can use the behavior because it was accessible with
// the global Gerrit... variable. To avoid breaking changes in plugins
// temporary assign global variables.
window.Gerrit = window.Gerrit || {};
window.Gerrit.RESTClientBehavior = RESTClientBehavior;