/**
 * @license
 * Copyright (C) 2021 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 '@polymer/paper-tooltip/paper-tooltip';
import '@polymer/iron-icon/iron-icon';
import {LitElement, css, html, PropertyValues, nothing} from 'lit';
import {customElement, property, state} from 'lit/decorators';
import {RunResult} from '../../models/checks/checks-model';
import {iconFor} from '../../models/checks/checks-util';
import {modifierPressed} from '../../utils/dom-util';
import './gr-checks-results';
import './gr-hovercard-run';
import {fontStyles} from '../../styles/gr-font-styles';

@customElement('gr-diff-check-result')
export class GrDiffCheckResult extends LitElement {
  @property({attribute: false})
  result?: RunResult;

  /**
   * This is required by <gr-diff> as an identifier for this component. It will
   * be set to the internalResultId of the check result.
   */
  @property({type: String})
  rootId?: string;

  @state()
  isExpanded = false;

  @state()
  isExpandable = false;

  static override get styles() {
    return [
      fontStyles,
      css`
        .container {
          font-family: var(--font-family);
          margin: 0 var(--spacing-s) var(--spacing-s);
          background-color: var(--unresolved-comment-background-color);
          box-shadow: var(--elevation-level-2);
          border-radius: var(--border-radius);
          padding: var(--spacing-xs) var(--spacing-m);
          border: 1px solid #888;
        }
        .container.info {
          border-color: var(--info-foreground);
          background-color: var(--info-background);
        }
        .container.info .icon {
          color: var(--info-foreground);
        }
        .container.warning {
          border-color: var(--warning-foreground);
          background-color: var(--warning-background);
        }
        .container.warning .icon {
          color: var(--warning-foreground);
        }
        .container.error {
          border-color: var(--error-foreground);
          background-color: var(--error-background);
        }
        .container.error .icon {
          color: var(--error-foreground);
        }
        .header {
          display: flex;
          white-space: nowrap;
          cursor: pointer;
        }
        .icon {
          margin-right: var(--spacing-s);
        }
        .name {
          margin-right: var(--spacing-m);
        }
        .summary {
          font-weight: var(--font-weight-bold);
          flex-shrink: 1;
          overflow: hidden;
          text-overflow: ellipsis;
          margin-right: var(--spacing-s);
        }
        .message {
          flex-grow: 1;
          /* Looks a bit unexpected, but the idea is that .message shrinks
             first, and only when that has shrunken to 0, then .summary should
             also start shrinking (substantially). */
          flex-shrink: 1000000;
          overflow: hidden;
          text-overflow: ellipsis;
          color: var(--deemphasized-text-color);
        }
        gr-result-expanded {
          display: block;
          margin-top: var(--spacing-m);
        }
        iron-icon {
          width: var(--line-height-normal);
          height: var(--line-height-normal);
          vertical-align: top;
        }
        .icon iron-icon {
          width: calc(var(--line-height-normal) - 4px);
          height: calc(var(--line-height-normal) - 4px);
          position: relative;
          top: 2px;
        }
      `,
    ];
  }

  override render() {
    if (!this.result) return;
    const cat = this.result.category.toLowerCase();
    return html`
      <div class="${cat} container font-normal">
        <div class="header" @click="${this.toggleExpandedClick}">
          <div class="icon">
            <iron-icon
              icon="gr-icons:${iconFor(this.result.category)}"
            ></iron-icon>
          </div>
          <div class="name">
            <gr-hovercard-run .run="${this.result}"></gr-hovercard-run>
            <div
              class="name"
              role="button"
              tabindex="0"
              @keydown="${this.toggleExpandedPress}"
            >
              ${this.result.checkName}
            </div>
          </div>
          <!-- The &nbsp; is for being able to shrink a tiny amount without
                the text itself getting shrunk with an ellipsis. -->
          <div class="summary">${this.result.summary}&nbsp;</div>
          <div class="message">
            ${this.isExpanded ? nothing : this.result.message}
          </div>
          ${this.renderToggle()}
        </div>
        <div class="details">${this.renderExpanded()}</div>
      </div>
    `;
  }

  private renderToggle() {
    if (!this.isExpandable) return nothing;
    return html`
      <div
        class="show-hide"
        role="switch"
        tabindex="0"
        aria-checked="${this.isExpanded ? 'true' : 'false'}"
        aria-label="${this.isExpanded
          ? 'Collapse result row'
          : 'Expand result row'}"
        @keydown="${this.toggleExpandedPress}"
      >
        <iron-icon
          icon="${this.isExpanded
            ? 'gr-icons:expand-less'
            : 'gr-icons:expand-more'}"
        ></iron-icon>
      </div>
    `;
  }

  private renderExpanded() {
    if (!this.isExpanded) return nothing;
    return html`
      <gr-result-expanded
        hidecodepointers
        .result="${this.result}"
      ></gr-result-expanded>
    `;
  }

  override updated(changedProperties: PropertyValues) {
    if (changedProperties.has('result')) {
      this.isExpandable = !!this.result?.summary && !!this.result?.message;
    }
  }

  private toggleExpandedClick(e: MouseEvent) {
    if (!this.isExpandable) return;
    e.preventDefault();
    e.stopPropagation();
    this.toggleExpanded();
  }

  private toggleExpandedPress(e: KeyboardEvent) {
    if (!this.isExpandable) return;
    if (modifierPressed(e)) return;
    // Only react to `return` and `space`.
    if (e.keyCode !== 13 && e.keyCode !== 32) return;
    e.preventDefault();
    e.stopPropagation();
    this.toggleExpanded();
  }

  private toggleExpanded() {
    if (!this.isExpandable) return;
    this.isExpanded = !this.isExpanded;
  }
}

declare global {
  interface HTMLElementTagNameMap {
    'gr-diff-check-result': GrDiffCheckResult;
  }
}