/**
 * Shared config — same values as the dashboard frontend's
 * VITE_API_BASE_URL / VITE_API_KEY (CLAUDE.md §9: every route requires
 * X-API-Key). This is a single app-wide key baked into the published
 * script, not a per-PM secret — same tradeoff as embedding it in the
 * frontend bundle. Real per-PM authorization is the email check inside
 * validateLicence() below, not this header.
 *
 * TEMPORARY — pointed at a local dev cloudflared quick tunnel for
 * testing the pull flow end-to-end before a real production domain
 * exists. Quick tunnels are not stable: the hostname changes every
 * time cloudflared restarts, and Cloudflare gives no uptime guarantee
 * on the free, account-less tier. Replace both values with the real
 * production API base URL + API_SECRET_KEY before publishing the
 * add-on for real PM use.
 */
const BETTERSIGHT_API_BASE_URL = 'https://api.bettersight.io';
const BETTERSIGHT_API_KEY = 'REPLACE_WITH_PRODUCTION_API_KEY';

const CACHE_KEY_VALID = 'BETTERSIGHT_VALID';
const CACHE_KEY_TIER = 'BETTERSIGHT_TIER';
const CACHE_DURATION_SECONDS = 21600; // 6 hours

/**
 * Flips a single onboarding_checklist flag to true on the PM's tenant,
 * exactly once per install (tracked locally via UserProperties so a
 * repeat success — e.g. every pull, or every cache expiry — doesn't
 * re-send the same PATCH). The Apps Script has no PocketBase JWT, so
 * it authenticates this call by email only, same as validateLicence()
 * — the backend's PATCH /account/onboarding accepts either.
 *
 * A failure here is a side-effect failure only: it never blocks the
 * primary action (validating a licence, pulling results) that
 * triggered it.
 */
function markOnboardingStepOnce_(flagName) {
  const properties = PropertiesService.getUserProperties();
  const sentKey = 'ONBOARDING_SENT_' + flagName;
  if (properties.getProperty(sentKey) === 'true') {
    return;
  }

  const email = Session.getActiveUser().getEmail();
  if (!email) return;

  try {
    const payload = { email: email };
    payload[flagName] = true;
    UrlFetchApp.fetch(`${BETTERSIGHT_API_BASE_URL}/account/onboarding`, {
      method: 'patch',
      contentType: 'application/json',
      headers: { 'X-API-Key': BETTERSIGHT_API_KEY },
      payload: JSON.stringify(payload),
      muteHttpExceptions: true
    });
    properties.setProperty(sentKey, 'true');
  } catch (e) {
    Logger.log('markOnboardingStepOnce_ failed for ' + flagName + ': ' + e.message);
  }
}

/**
 * Validates the current user's licence against the Bettersight API.
 * Standalone script — validates by email only, no sheet binding of
 * any kind (CLAUDE.md §15).
 *
 * Data flow:
 *   check 6-hour cache → cache hit: return true immediately →
 *   cache miss: Session.getActiveUser().getEmail() →
 *   POST {BETTERSIGHT_API_BASE_URL}/validate-email →
 *   valid: cache result + tier for 6 hours, return true →
 *   invalid: show a UI alert with the rejection reason, return false
 */
function validateLicence() {
  const cache = CacheService.getUserCache();
  const cachedValid = cache.get(CACHE_KEY_VALID);
  if (cachedValid === 'true') {
    return true;
  }

  const email = Session.getActiveUser().getEmail();
  if (!email) {
    SpreadsheetApp.getUi().alert('Could not determine your Google account email. Please try again.');
    return false;
  }

  let response;
  try {
    response = UrlFetchApp.fetch(`${BETTERSIGHT_API_BASE_URL}/validate-email`, {
      method: 'post',
      contentType: 'application/json',
      headers: { 'X-API-Key': BETTERSIGHT_API_KEY },
      payload: JSON.stringify({ email: email }),
      muteHttpExceptions: true
    });
  } catch (e) {
    SpreadsheetApp.getUi().alert('Could not reach Bettersight — check your connection and try again.');
    return false;
  }

  const body = JSON.parse(response.getContentText());

  if (body.valid) {
    cache.put(CACHE_KEY_VALID, 'true', CACHE_DURATION_SECONDS);
    cache.put(CACHE_KEY_TIER, body.tier || '', CACHE_DURATION_SECONDS);
    markOnboardingStepOnce_('sidebar_installed');
    return true;
  }

  SpreadsheetApp.getUi().alert(`Bettersight access denied: ${body.reason || 'Unknown reason'}`);
  return false;
}