/**
 * @module autoroll/modules/arb-mode-history-sk
 * @description <h2><code>arb-mode-history-sk</code></h2>
 *
 * <p>
 * This element displays the mode change history for a roller.
 * </p>
 */

import { html } from 'lit-html';
import { define } from '../../../elements-sk/modules/define';

import { ElementSk } from '../../../infra-sk/modules/ElementSk';
import '../../../infra-sk/modules/human-date-sk';

import {
  AutoRollService,
  GetAutoRollService,
  GetModeHistoryResponse,
  Mode,
  ModeChange,
} from '../rpc';

export class ARBModeHistorySk extends ElementSk {
  private static template = (ele: ARBModeHistorySk) => html`
    <a href="/r/${ele.roller}" class="small">back to roller status</a>
    <br />
    <table>
      <tr>
        <th>Time</th>
        <th>Mode</th>
        <th>User</th>
        <th>Message</th>
      </tr>
      ${ele.history.map(
        (entry: ModeChange) => html`
          <tr>
            <td>
              <human-date-sk
                .date="${entry.time!}"
                .diff="${true}"></human-date-sk>
            </td>
            <td class="${ele.modeClass(entry.mode!)}">
              ${entry.mode?.toString()}
            </td>
            <td>${entry.user?.toString()}</td>
            <td>${entry.message}</td>
          </tr>
        `
      )}
    </table>
    <br />
    <button
      @click="${() => {
        ele.load(ele.prevOffset);
      }}"
      ?disabled="${ele.currentOffset === 0}">
      Previous
    </button>
    <button
      @click="${() => {
        ele.load(ele.nextOffset);
      }}"
      ?disabled="${ele.nextOffset === 0}">
      Next
    </button>
  `;

  private history: ModeChange[] = [];

  private prevOffset: number = -1;

  private currentOffset: number = 0;

  private nextOffset: number = 0;

  private rpc: AutoRollService;

  constructor() {
    super(ARBModeHistorySk.template);
    this.rpc = GetAutoRollService(this);
  }

  connectedCallback() {
    super.connectedCallback();
    this.load(0);
  }

  get roller() {
    return this.getAttribute('roller') || '';
  }

  set roller(v: string) {
    this.setAttribute('roller', v);
    this.prevOffset = -1;
    this.currentOffset = 0;
    this.nextOffset = 0;
    this.load(0);
  }

  private modeClass(mode: Mode): string {
    switch (mode) {
      case Mode.RUNNING:
        return 'fg-running';
      case Mode.DRY_RUN:
        return 'fg-dry-run';
      case Mode.STOPPED:
        return 'fg-stopped';
      case Mode.OFFLINE:
        return 'fg-offline';
      default:
        return '';
    }
  }

  private load(offset: number) {
    const req = {
      rollerId: this.roller,
      offset: offset,
    };
    this.rpc.getModeHistory(req).then((resp: GetModeHistoryResponse) => {
      this.history = resp.history!;
      if (offset > this.currentOffset) {
        this.prevOffset = this.currentOffset;
      } else {
        this.prevOffset = offset - this.history.length;
      }
      this.currentOffset = offset;
      this.nextOffset = resp.nextOffset;
      this._render();
    });
  }
}

define('arb-mode-history-sk', ARBModeHistorySk);