import { APP_VERSION } from '../../app/config.js';

export function renderSettingsPage() {
  return `
    <section class="container-xxl py-4 py-lg-5">
      <div class="row g-4">
        <div class="col-12 col-lg-7">
          <div class="card border-0 shadow-sm">
            <div class="card-body p-4" x-data="settingsPage()" x-init="initUpdatePanel()">
              <div class="d-flex justify-content-between align-items-start mb-4">
                <div>
                  <p class="eyebrow mb-2">Client Settings</p>
                  <h1 class="h3 mb-1">Connection & workspace</h1>
                  <p class="text-body-secondary mb-0">
                    These values are stored locally and reused to start the Tryton user application flow.
                  </p>
                </div>
              </div>

              <form class="vstack gap-3" @submit.prevent="save()">
                <div>
                  <label class="form-label">Tryton server URL</label>
                  <input class="form-control" type="url" x-model="form.baseUrl" />
                  <div class="form-text">
                    Leave empty to use the same origin as this deployed Lonc frontend.
                  </div>
                </div>
                <div>
                  <label class="form-label">Database name</label>
                  <input class="form-control" type="text" x-model="form.database" required />
                </div>
                <div>
                  <label class="form-label">User login</label>
                  <input class="form-control" type="text" :value="userLogin" readonly />
                </div>
                <div>
                  <label class="form-label">Application key</label>
                  <input class="form-control font-monospace" type="text" :value="maskedApplicationKey" readonly />
                  <div class="form-text">
                    Only the first 16 characters are shown for identification.
                  </div>
                </div>
                <button class="btn btn-primary align-self-start" type="submit">Save settings</button>
              </form>

              <hr class="my-4" />

              <div class="vstack gap-3">
                <div>
                  <h2 class="h5 mb-1">App update</h2>
                  <p class="text-body-secondary mb-0">
                    Check for the latest deployed build and force-refresh this installed app when needed.
                  </p>
                </div>
                <div class="row g-3 small">
                  <div class="col-12 col-md-6">
                    <div class="border rounded-3 p-3 h-100 bg-body-tertiary">
                      <div class="text-uppercase text-body-secondary fw-semibold mb-1">Current version</div>
                      <div class="fw-semibold" x-text="update.currentVersion"></div>
                    </div>
                  </div>
                  <div class="col-12 col-md-6">
                    <div class="border rounded-3 p-3 h-100 bg-body-tertiary">
                      <div class="text-uppercase text-body-secondary fw-semibold mb-1">Server version</div>
                      <div class="fw-semibold" x-text="update.serverVersion || 'Unavailable'"></div>
                      <template x-if="update.serverBuildTime">
                        <div class="text-body-secondary mt-1" x-text="'Built: ' + formatBuildTime(update.serverBuildTime)"></div>
                      </template>
                    </div>
                  </div>
                </div>
                <div class="d-flex flex-wrap align-items-center gap-2">
                  <button class="btn btn-outline-secondary" type="button" @click="checkForUpdates()" :disabled="update.isChecking || update.isApplying">
                    <span x-show="!update.isChecking">Check for updates</span>
                    <span x-show="update.isChecking">Checking...</span>
                  </button>
                  <button class="btn btn-primary" type="button" @click="applyUpdate()" :disabled="update.isApplying">
                    <span x-show="!update.isApplying">Update app</span>
                    <span x-show="update.isApplying">Updating...</span>
                  </button>
                </div>
                <div class="small" :class="updateStatusClass()" x-text="update.statusText"></div>
              </div>
            </div>
          </div>
        </div>

        <div class="col-12 col-lg-5">
          <div class="card border-0 shadow-sm">
            <div class="card-body p-4">
              <h2 class="h5">Integration notes</h2>
              <ul class="text-body-secondary small ps-3 mb-0">
                <li>Connection uses Tryton user application keys for the <code>kitchen</code> application.</li>
                <li>Leaving the server URL empty makes API calls use same-origin relative paths.</li>
                <li>Kitchen-scoped requests are built as <code>/{database}/kitchen/{kitchenId}/...</code>.</li>
                <li>Label preview accepts image blobs, image URLs, or SVG payloads.</li>
              </ul>
            </div>
          </div>
        </div>
      </div>
    </section>
  `;
}

export function settingsPageData(store) {
  return {
    form: {
      baseUrl: store.config.baseUrl || '',
      database: store.config.database || '',
    },
    update: {
      currentVersion: APP_VERSION,
      serverVersion: null,
      serverBuildTime: null,
      statusText: 'Ready to check for updates.',
      statusType: 'secondary',
      isChecking: false,
      isApplying: false,
    },
    get userLogin() {
      return store.session?.userLogin || '';
    },
    get maskedApplicationKey() {
      const key = store.session?.applicationKey || '';
      return key ? `${key.slice(0, 16)}...` : '';
    },
    save() {
      store.setConfig({
        baseUrl: this.form.baseUrl.trim(),
        database: this.form.database.trim(),
      });

      store.addAlert({ type: 'success', message: 'Settings saved locally.' });
    },
    formatBuildTime(value) {
      const date = new Date(value);
      if (Number.isNaN(date.getTime())) {
        return value;
      }

      return date.toLocaleString();
    },
    updateStatusClass() {
      switch (this.update.statusType) {
        case 'success':
          return 'text-success';
        case 'warning':
          return 'text-warning';
        case 'danger':
          return 'text-danger';
        default:
          return 'text-body-secondary';
      }
    },
    async initUpdatePanel() {
      await this.checkForUpdates();
    },
    async checkForUpdates() {
      if (!window.__loncApp?.checkForAppUpdate) {
        this.update.statusText = 'Service worker updates are not available in this browser.';
        this.update.statusType = 'warning';
        return;
      }

      this.update.isChecking = true;
      this.update.statusText = 'Checking for updates...';
      this.update.statusType = 'secondary';

      try {
        const result = await window.__loncApp.checkForAppUpdate();
        this.update.currentVersion = result.currentVersion || APP_VERSION;
        this.update.serverVersion = result.serverVersion || null;
        this.update.serverBuildTime = result.serverBuildTime || null;

        if (result.updateAvailable) {
          this.update.statusText = 'Update available. Use "Update app" to refresh this installed build.';
          this.update.statusType = 'warning';
        } else if (result.serverError) {
          this.update.statusText = `No update signal from server (${result.serverError}).`;
          this.update.statusType = 'secondary';
        } else {
          this.update.statusText = 'This app is up to date.';
          this.update.statusType = 'success';
        }
      } catch (error) {
        const message = error instanceof Error ? error.message : 'Unknown update check error.';
        this.update.statusText = `Update check failed: ${message}`;
        this.update.statusType = 'danger';
      } finally {
        this.update.isChecking = false;
      }
    },
    async applyUpdate() {
      if (!window.__loncApp?.applyAppUpdate) {
        this.update.statusText = 'Update action is not available in this browser.';
        this.update.statusType = 'warning';
        return;
      }

      this.update.isApplying = true;
      this.update.statusText = 'Applying update and refreshing app...';
      this.update.statusType = 'warning';

      try {
        await window.__loncApp.applyAppUpdate();
      } catch (error) {
        const message = error instanceof Error ? error.message : 'Unknown update error.';
        this.update.statusText = `Update failed: ${message}`;
        this.update.statusType = 'danger';
        this.update.isApplying = false;
      }
    },
  };
}