/**
 * EcoOS Updates View
 * Card-based update management
 */

import {
  html,
  DeesElement,
  customElement,
  property,
  state,
  css,
  type TemplateResult,
} from '@design.estate/dees-element';
import { DeesButton, DeesPanel, DeesBadge } from '@design.estate/dees-catalog';

import { sharedStyles, formatAge } from '../styles/shared.js';
import type { IUpdateInfo } from '../../ts_interfaces/updates.js';

@customElement('ecoos-updates')
export class EcoosUpdates extends DeesElement {
  @property({ type: Object })
  public accessor updateInfo: IUpdateInfo | null = null;

  @state()
  private accessor loading: boolean = false;

  @state()
  private accessor message: string = '';

  @state()
  private accessor messageError: boolean = false;

  public static styles = [
    sharedStyles,
    css`
      :host {
        display: block;
        padding: 16px;
      }

      .page {
        display: flex;
        flex-direction: column;
        gap: 16px;
      }

      .version-display {
        font-size: var(--text-2xl);
        font-weight: 600;
        font-family: 'SF Mono', monospace;
        margin-bottom: 8px;
      }

      .last-check {
        font-size: var(--text-xs);
        color: var(--text-tertiary);
        margin-bottom: 12px;
      }

      .banner-upgrade {
        background: hsla(217.2, 91.2%, 59.8%, 0.1);
        border-color: hsla(217.2, 91.2%, 59.8%, 0.3);
      }

      .banner-content {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: var(--text-sm);
      }

      .banner-content strong {
        font-family: 'SF Mono', monospace;
      }

      .update-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 10px 0;
        border-bottom: 1px solid var(--border);
        gap: 12px;
      }

      .update-row:last-child {
        border-bottom: none;
        padding-bottom: 0;
      }

      .update-row:first-child {
        padding-top: 0;
      }

      .update-version {
        font-family: 'SF Mono', monospace;
        font-size: var(--text-sm);
        font-weight: 500;
      }

      .update-age {
        font-size: var(--text-xs);
        color: var(--text-tertiary);
        flex: 1;
      }

      .empty-text {
        font-size: var(--text-sm);
        color: var(--text-tertiary);
        padding: 8px 0;
      }

      .message-bar {
        padding: 8px 12px;
        border-radius: 6px;
        font-size: var(--text-sm);
      }

      .message-bar.success {
        background: hsla(142.1, 76.2%, 36.3%, 0.15);
        color: var(--success);
      }

      .message-bar.error {
        background: hsla(0, 84.2%, 60.2%, 0.15);
        color: var(--error);
      }
    `,
  ];

  render(): TemplateResult {
    if (!this.updateInfo) {
      return html`<div class="empty">Loading...</div>`;
    }

    const newerReleases = this.updateInfo.releases.filter(r => r.isNewer);
    const { autoUpgrade, lastCheck } = this.updateInfo;

    return html`
      <div class="page">
        <!-- Current Version -->
        <dees-panel .title=${'Current Version'}>
          <div class="version-display">v${this.updateInfo.currentVersion}</div>
          ${lastCheck ? html`<div class="last-check">Last check: ${new Date(lastCheck).toLocaleString()}</div>` : ''}
          <dees-button
            .type=${'default'}
            .text=${this.loading ? 'Checking...' : 'Check for Updates'}
            .disabled=${this.loading}
            @click=${this.checkForUpdates}
          ></dees-button>
        </dees-panel>

        <!-- Auto-upgrade Banner -->
        ${autoUpgrade?.targetVersion ? html`
          <dees-panel .variant=${'outline'} class="banner-upgrade">
            <div class="banner-content">
              ${autoUpgrade.waitingForStability
                ? html`Auto-upgrade to <strong>v${autoUpgrade.targetVersion}</strong> in ${autoUpgrade.scheduledIn}`
                : html`Auto-upgrade to <strong>v${autoUpgrade.targetVersion}</strong> pending`
              }
            </div>
          </dees-panel>
        ` : ''}

        <!-- Available Updates -->
        <dees-panel .title=${'Available Updates'}>
          ${newerReleases.length === 0
            ? html`<div class="empty-text">You're up to date</div>`
            : newerReleases.map(r => html`
                <div class="update-row">
                  <span class="update-version">v${r.version}</span>
                  <span class="update-age">${formatAge(r.ageHours)}</span>
                  <dees-button
                    .type=${'default'}
                    .status=${'success'}
                    .text=${'Upgrade'}
                    .disabled=${this.loading}
                    @click=${() => this.upgradeToVersion(r.version)}
                  ></dees-button>
                </div>
              `)
          }
        </dees-panel>

        <!-- Message -->
        ${this.message ? html`
          <div class="message-bar ${this.messageError ? 'error' : 'success'}">${this.message}</div>
        ` : ''}
      </div>
    `;
  }

  private async checkForUpdates(): Promise<void> {
    this.loading = true;
    this.message = '';
    try {
      const response = await fetch('/api/updates/check', { method: 'POST' });
      const result = await response.json();
      this.updateInfo = result;
      this.dispatchEvent(new CustomEvent('updates-checked', { detail: result }));
    } catch (error) {
      console.error('Failed to check updates:', error);
      this.message = `Failed: ${error}`;
      this.messageError = true;
    } finally {
      this.loading = false;
    }
  }

  private async upgradeToVersion(version: string): Promise<void> {
    if (!confirm(`Upgrade to v${version}?`)) return;

    this.loading = true;
    this.message = '';
    try {
      const response = await fetch('/api/upgrade', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ version }),
      });
      const result = await response.json();
      if (result.success) {
        this.message = result.message;
        this.messageError = false;
        this.dispatchEvent(new CustomEvent('upgrade-started', { detail: result }));
      } else {
        this.message = `Failed: ${result.message}`;
        this.messageError = true;
      }
    } catch (error) {
      this.message = `Error: ${error}`;
      this.messageError = true;
    } finally {
      this.loading = false;
    }
  }
}