/**
 * @license
 * Copyright (C) 2017 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 '../gr-tooltip-content/gr-tooltip-content';
import '../../../styles/shared-styles';
import {PolymerElement} from '@polymer/polymer/polymer-element';
import {htmlTemplate} from './gr-change-status_html';
import {customElement, property} from '@polymer/decorators';
import {GerritNav} from '../../core/gr-navigation/gr-navigation';
import {getRevertCommitHash} from '../../../utils/message-util';
import {ChangeInfo} from '../../../types/common';
import {ParsedChangeInfo} from '../../../types/types';

enum ChangeStates {
  MERGED = 'Merged',
  ABANDONED = 'Abandoned',
  MERGE_CONFLICT = 'Merge Conflict',
  WIP = 'WIP',
  PRIVATE = 'Private',
  REVERT_CREATED = 'Revert Created',
}

const WIP_TOOLTIP =
  "This change isn't ready to be reviewed or submitted. " +
  "It will not appear on dashboards unless you are CC'ed or assigned, " +
  'and email notifications will be silenced until the review is started.';

export const MERGE_CONFLICT_TOOLTIP =
  'This change has merge conflicts. ' +
  'Download the patch and run "git rebase". ' +
  'Upload a new patchset after resolving all merge conflicts.';

const PRIVATE_TOOLTIP =
  'This change is only visible to its owner and ' +
  'current reviewers (or anyone with "View Private Changes" permission).';

@customElement('gr-change-status')
class GrChangeStatus extends PolymerElement {
  static get template() {
    return htmlTemplate;
  }

  @property({type: Boolean, reflectToAttribute: true})
  flat = false;

  @property({type: Object})
  change?: ChangeInfo | ParsedChangeInfo;

  @property({type: String, observer: '_updateChipDetails'})
  status?: ChangeStates;

  @property({type: String})
  tooltipText = '';

  _computeStatusString(status: ChangeStates) {
    if (status === ChangeStates.WIP && !this.flat) {
      return 'Work in Progress';
    }
    return status;
  }

  _toClassName(str?: ChangeStates) {
    return str ? str.toLowerCase().replace(/\s/g, '-') : '';
  }

  hasStatusLink(status: ChangeStates) {
    return status === ChangeStates.REVERT_CREATED;
  }

  getStatusLink(change?: ParsedChangeInfo) {
    if (!change) return;
    const revertCommit = getRevertCommitHash(change.messages);
    if (!revertCommit) return;
    return GerritNav.getUrlForSearchQuery(revertCommit);
  }

  _updateChipDetails(status?: ChangeStates, previousStatus?: ChangeStates) {
    if (previousStatus) {
      this.classList.remove(this._toClassName(previousStatus));
    }
    this.classList.add(this._toClassName(status));

    switch (status) {
      case ChangeStates.WIP:
        this.tooltipText = WIP_TOOLTIP;
        break;
      case ChangeStates.PRIVATE:
        this.tooltipText = PRIVATE_TOOLTIP;
        break;
      case ChangeStates.MERGE_CONFLICT:
        this.tooltipText = MERGE_CONFLICT_TOOLTIP;
        break;
      default:
        this.tooltipText = '';
        break;
    }
  }
}

declare global {
  interface HTMLElementTagNameMap {
    'gr-change-status': GrChangeStatus;
  }
}