// Account settings: profile, reminder settings, test notification, and the full data export.
import { getAllProjects, getAllReaderInk, getPrayers, getProject, getReaderHistory, getReaderMarks, getReadingProgress, getUserById, getUserPrefs, setPodcastName, setPrayerReminder, setReminderSettings, setVotdSettings } from '../db.js';
import { requireAuth } from '../auth.js';
import { votdAvailable } from '../votd.js';
import { assertPublicUrl, isValidTimeZone, sendTestReminder } from '../reminders.js';
import { accountExportName, buildAccountExport } from '../accountExport.js';

export function registerAccountRoutes(app) {
  // ---------------------------------------------------------------------------
  // PATCH /api/auth/profile — update account-level settings (currently just podcastName)
  // ---------------------------------------------------------------------------
  app.patch('/api/auth/profile', requireAuth, (req, res) => {
    try {
      const podcastName = String(req.body?.podcastName ?? '').trim().slice(0, 200);
      setPodcastName(req.session.userId, podcastName || null);
      res.json({ podcastName: podcastName || null });
    } catch (err) {
      console.error('PATCH /api/auth/profile error:', err);
      res.status(500).json({ error: 'Failed to save profile.' });
    }
  });

  // ---------------------------------------------------------------------------
  // PATCH /api/auth/reminder-settings — daily reading reminder via ntfy.sh
  // ---------------------------------------------------------------------------
  app.patch('/api/auth/reminder-settings', requireAuth, async (req, res) => {
    try {
      const reminderEnabled = !!req.body?.reminderEnabled;
      const ntfyTopic = String(req.body?.ntfyTopic ?? '').trim();
      const ntfyUrl = String(req.body?.ntfyUrl ?? '').trim();
      const reminderTime = String(req.body?.reminderTime ?? '').trim();
      const reminderTz = isValidTimeZone(req.body?.reminderTz) ? String(req.body.reminderTz) : null;

      if (ntfyTopic && !/^[A-Za-z0-9_-]{1,64}$/.test(ntfyTopic)) {
        return res.status(400).json({ error: 'Topic can only contain letters, numbers, "-" and "_".' });
      }
      if (ntfyUrl && !/^https?:\/\/.{1,200}$/.test(ntfyUrl)) {
        return res.status(400).json({ error: 'Server URL must start with http:// or https://.' });
      }
      if (ntfyUrl) {
        try { await assertPublicUrl(ntfyUrl); } catch (err) { return res.status(400).json({ error: err.message }); }
      }
      if (reminderEnabled) {
        if (!ntfyTopic) return res.status(400).json({ error: 'A topic is required to enable reminders.' });
        if (!/^([01]\d|2[0-3]):[0-5]\d$/.test(reminderTime)) {
          return res.status(400).json({ error: 'Reminder time must be in HH:MM format.' });
        }
      }

      // the verse of the day is optional, and only offered when the server can look it up
      const votdEnabled = !!req.body?.votdEnabled && votdAvailable();
      const votdTime = String(req.body?.votdTime ?? '').trim();
      if (votdEnabled) {
        if (!ntfyTopic) return res.status(400).json({ error: 'A topic is required to send the verse of the day.' });
        if (!/^([01]\d|2[0-3]):[0-5]\d$/.test(votdTime)) return res.status(400).json({ error: 'The verse of the day time must be in HH:MM format.' });
      }
      setVotdSettings(req.session.userId, { votdEnabled, votdTime: votdTime || null });
      const prayerEnabled = !!req.body?.prayerEnabled;
      const prayerTime = String(req.body?.prayerTime ?? '').trim();
      if (prayerEnabled) {
        if (!ntfyTopic) return res.status(400).json({ error: 'A topic is required to send the prayer reminder.' });
        if (!/^([01]\d|2[0-3]):[0-5]\d$/.test(prayerTime)) return res.status(400).json({ error: 'The prayer reminder time must be in HH:MM format.' });
      }
      setPrayerReminder(req.session.userId, { prayerEnabled, prayerTime: prayerTime || null });
      setReminderSettings(req.session.userId, {
        ntfyUrl: ntfyUrl || null,
        ntfyTopic: ntfyTopic || null,
        reminderTime: reminderTime || null,
        reminderEnabled,
        reminderTz,
      });
      res.json({
        reminderEnabled, ntfyUrl: ntfyUrl || null, ntfyTopic: ntfyTopic || null, reminderTime: reminderTime || null,
        votdEnabled, votdTime: votdTime || null, prayerEnabled, prayerTime: prayerTime || null,
      });
    } catch (err) {
      console.error('PATCH /api/auth/reminder-settings error:', err);
      res.status(500).json({ error: 'Failed to save reminder settings.' });
    }
  });

  // ---------------------------------------------------------------------------
  // ---------------------------------------------------------------------------
  // GET /api/account/export — everything this account holds, as one restorable file
  // ---------------------------------------------------------------------------
  app.get('/api/account/export', requireAuth, (req, res) => {
    try {
      const userId = req.session.userId;
      const user = getUserById(userId);
      const backup = buildAccountExport(user, {
        projects: () => getAllProjects(userId).map((p) => getProject(p.id, userId)).filter(Boolean),
        prefs: () => getUserPrefs(userId),
        marks: () => getReaderMarks(userId),
        ink: () => getAllReaderInk(userId),
        plans: () => getReadingProgress(userId),
        history: () => getReaderHistory(userId),
        prayers: () => getPrayers(userId).filter((p) => !p.deleted),
      });
      res.set('Content-Disposition', `attachment; filename="${accountExportName()}"`);
      res.json(backup);
    } catch (err) {
      console.error('GET /api/account/export error:', err);
      res.status(500).json({ error: 'Failed to export your data.' });
    }
  });

  // POST /api/auth/reminder-test — sends a test notification to the topic in the request
  // body (so it can be tried before saving), or to the saved settings.
  const _lastReminderTest = new Map(); // userId -> timestamp, to keep test sends from being spammed
  app.post('/api/auth/reminder-test', requireAuth, async (req, res) => {
    const userId = req.session.userId;
    if (Date.now() - (_lastReminderTest.get(userId) ?? 0) < 5000) {
      return res.status(429).json({ error: 'Wait a few seconds before sending another test.' });
    }
    _lastReminderTest.set(userId, Date.now());
    const saved = getUserById(userId);
    const ntfyTopic = String(req.body?.ntfyTopic ?? saved?.ntfyTopic ?? '').trim();
    const ntfyUrl = String(req.body?.ntfyUrl ?? saved?.ntfyUrl ?? '').trim();
    if (!ntfyTopic) return res.status(400).json({ error: 'Enter a topic first.' });
    if (!/^[A-Za-z0-9_-]{1,64}$/.test(ntfyTopic)) {
      return res.status(400).json({ error: 'Topic can only contain letters, numbers, "-" and "_".' });
    }
    if (ntfyUrl && !/^https?:\/\/.{1,200}$/.test(ntfyUrl)) {
      return res.status(400).json({ error: 'Server URL must start with http:// or https://.' });
    }
    try {
      await sendTestReminder({ ntfyTopic, ntfyUrl });
      res.json({ ok: true });
    } catch (err) {
      res.status(502).json({ error: err.message });
    }
  });
}