import { clearStoredUserProfile } from './mobile-profile.js';

const KEY = 'insuite_mobile_token';
const INSTALLATION_KEY = 'insuite_mobile_installation_id';
const TRIAL_DEVICE_KEY = 'insuite_mobile_trial_device_id';
const TRIAL_START_KEY = 'insuite_mobile_trial_started_at';
const TRIAL_DURATION_MS = 14 * 24 * 60 * 60 * 1000;

function parseStoredTimestamp(value) {
  const parsed = Number(value);
  return Number.isFinite(parsed) && parsed > 0 ? parsed : 0;
}

function createInstallationId() {
  if (typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function') {
    return crypto.randomUUID();
  }

  return `install_${Date.now()}_${Math.random().toString(36).slice(2, 10)}`;
}

export function ensureUsageTrialInitialized() {
  let installationId = localStorage.getItem(INSTALLATION_KEY) || '';
  let startedAt = parseStoredTimestamp(localStorage.getItem(TRIAL_START_KEY));

  if (!installationId) {
    installationId = createInstallationId();
    localStorage.setItem(INSTALLATION_KEY, installationId);
    startedAt = 0;
  }

  if (!startedAt) {
    startedAt = Date.now();
    localStorage.setItem(TRIAL_START_KEY, String(startedAt));
  }

  return { installationId, startedAt };
}

export function setUsageTrialDeviceId(deviceId) {
  const normalized = String(deviceId || '').trim();
  if (!normalized) return '';
  localStorage.setItem(TRIAL_DEVICE_KEY, normalized);
  return normalized;
}

export function getUsageTrialDeviceId() {
  return String(localStorage.getItem(TRIAL_DEVICE_KEY) || '').trim();
}

export function setUsageTrialStart(startedAt) {
  const parsed = parseStoredTimestamp(startedAt);
  if (!parsed) return 0;
  localStorage.setItem(TRIAL_START_KEY, String(parsed));
  return parsed;
}

export function getUsageTrialState() {
  const { installationId, startedAt } = ensureUsageTrialInitialized();
  const deviceId = getUsageTrialDeviceId();

  const expiresAt = startedAt + TRIAL_DURATION_MS;
  const remainingMs = Math.max(0, expiresAt - Date.now());
  const expired = remainingMs <= 0;

  return {
    installationId,
    deviceId,
    startedAt,
    expiresAt,
    remainingMs,
    expired,
    totalDurationMs: TRIAL_DURATION_MS,
  };
}

export function isUsageTrialExpired() {
  return getUsageTrialState().expired;
}

export function getToken() {
  if (isUsageTrialExpired()) {
    clearToken();
    return '';
  }
  return localStorage.getItem(KEY) || '';
}

export function setToken(token) {
  if (isUsageTrialExpired()) {
    clearToken();
    return;
  }
  const previousToken = localStorage.getItem(KEY) || '';
  if (previousToken && previousToken !== token) {
    clearStoredUserProfile();
  }
  localStorage.setItem(KEY, token);
}

export function clearToken() {
  localStorage.removeItem(KEY);
  clearStoredUserProfile();
}