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/**
 * @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 '../gr-icons/gr-icons';
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 {
  GeneratedWebLink,
  GerritNav,
} from '../../core/gr-navigation/gr-navigation';
import {ChangeInfo} from '../../../types/common';
import {ParsedChangeInfo} from '../../../types/types';

export enum ChangeStates {
  ABANDONED = 'Abandoned',
  ACTIVE = 'Active',
  MERGE_CONFLICT = 'Merge Conflict',
  MERGED = 'Merged',
  PRIVATE = 'Private',
  READY_TO_SUBMIT = 'Ready to submit',
  REVERT_CREATED = 'Revert Created',
  REVERT_SUBMITTED = 'Revert Submitted',
  WIP = 'WIP',
}

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')
export 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 = '';

  @property({type: Object})
  revertedChange?: ChangeInfo;

  @property({type: Object})
  resolveWeblinks?: GeneratedWebLink[] = [];

  _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(
    revertedChange?: ChangeInfo,
    resolveWeblinks?: GeneratedWebLink[],
    status?: ChangeStates
  ): boolean {
    const isRevertCreatedOrSubmitted =
      (status === ChangeStates.REVERT_SUBMITTED ||
        status === ChangeStates.REVERT_CREATED) &&
      revertedChange !== undefined;
    return (
      isRevertCreatedOrSubmitted ||
      !!(status === ChangeStates.MERGE_CONFLICT && resolveWeblinks?.length)
    );
  }

  getStatusLink(
    revertedChange?: ChangeInfo,
    resolveWeblinks?: GeneratedWebLink[],
    status?: ChangeStates
  ): string {
    if (revertedChange) {
      return GerritNav.getUrlForSearchQuery(`${revertedChange._number}`);
    }
    if (status === ChangeStates.MERGE_CONFLICT && resolveWeblinks?.length) {
      return resolveWeblinks[0].url ?? '';
    }
    return '';
  }

  showResolveIcon(
    resolveWeblinks?: GeneratedWebLink[],
    status?: ChangeStates
  ): boolean {
    return status === ChangeStates.MERGE_CONFLICT && !!resolveWeblinks?.length;
  }

  _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;
  }
}