const express = require('express');
const { CONFIG } = require('../config');
const { applyConfigUpdates, readAllConfig } = require('../services/configPersistence');
const { logSystem } = require('../services/debugLog');

const router = express.Router();

// Middleware: verify internal secret
router.use((req, res, next) => {
  const secret = req.headers['x-internal-secret'];
  if (!CONFIG.INTERNAL_API_SECRET || secret !== CONFIG.INTERNAL_API_SECRET) {
    return res.status(401).json({ error: 'Unauthorized' });
  }
  next();
});

// GET /config — return all current .env values (redacted secrets)
router.get('/config', (req, res) => {
  const map = readAllConfig();
  const obj = {};
  const REDACTED = ['DISCORD_TOKEN', 'REFRESH_TOKEN', 'GOOGLE_CLIENT_SECRET', 'MONGODB_URI', 'INTERNAL_API_SECRET', 'SETTINGS_ADMIN_PASSWORD'];
  for (const [k, v] of map) {
    obj[k] = REDACTED.includes(k) ? '••••••••' : v;
  }
  res.json(obj);
});

// POST /config — apply config updates
router.post('/config', express.json(), async (req, res) => {
  const updates = req.body;
  if (!updates || typeof updates !== 'object') {
    return res.status(400).json({ error: 'Invalid body' });
  }
  const result = applyConfigUpdates(updates);
  await logSystem('Config updated via settings UI', [
    { name: 'Keys updated', value: result.applied.join(', ') || 'none', inline: false },
    { name: 'Errors', value: result.errors.join(', ') || 'none', inline: false }
  ]).catch(() => {});
  res.json(result);
});

// GET /discord/guild — return guild info for smart dropdowns
router.get('/discord/guild', async (req, res) => {
  try {
    const client = require('../api/bosscordClient').getBot();
    if (!client) return res.status(503).json({ error: 'Bot not ready' });

    const guild = client.guilds.cache.get(CONFIG.DISCORD_GUILD_ID);
    if (!guild) return res.status(404).json({ error: 'Guild not found' });

    await guild.members.fetch().catch(() => {});

    const channels = guild.channels.cache
      .filter(c => [0, 4, 5, 15].includes(c.type))
      .map(c => ({ id: c.id, name: c.name, type: c.type, parentId: c.parentId }))
      .sort((a, b) => a.name.localeCompare(b.name));

    const roles = guild.roles.cache
      .filter(r => !r.managed && r.id !== guild.id)
      .map(r => ({ id: r.id, name: r.name, color: r.hexColor }))
      .sort((a, b) => b.position - a.position);

    const members = guild.members.cache
      .filter(m => !m.user.bot)
      .map(m => ({
        id: m.id,
        username: m.user.username,
        displayName: m.displayName,
        avatar: m.user.displayAvatarURL({ size: 32 })
      }))
      .sort((a, b) => a.displayName.localeCompare(b.displayName));

    const categories = guild.channels.cache
      .filter(c => c.type === 4)
      .map(c => ({ id: c.id, name: c.name }))
      .sort((a, b) => a.name.localeCompare(b.name));

    res.json({ channels, roles, members, categories });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// POST /restart — restart the bot process
let scheduledRestart = null;

router.post('/restart', express.json(), (req, res) => {
  const { mode, scheduledFor } = req.body;

  if (mode === 'immediate') {
    res.json({ ok: true, mode });
    setTimeout(() => {
      console.log('[restart] Restarting bot process...');
      process.exit(0); // Docker/systemd will restart
    }, 1500);
    return;
  }

  if (mode === 'scheduled' && scheduledFor) {
    const delay = new Date(scheduledFor).getTime() - Date.now();
    if (delay <= 0) return res.status(400).json({ error: 'Scheduled time is in the past' });
    if (scheduledRestart) clearTimeout(scheduledRestart);
    scheduledRestart = setTimeout(() => {
      console.log('[restart] Scheduled restart firing...');
      process.exit(0);
    }, delay);
    res.json({ ok: true, mode, scheduledFor, delayMs: delay });
    return;
  }

  if (mode === 'cancel_scheduled') {
    if (scheduledRestart) { clearTimeout(scheduledRestart); scheduledRestart = null; }
    res.json({ ok: true, cancelled: true });
    return;
  }

  if (mode === 'pending') {
    res.json({ ok: true, mode: 'pending', note: 'Restart required on next manual restart' });
    return;
  }

  res.status(400).json({ error: 'Invalid mode' });
});

router.get('/restart/status', (req, res) => {
  res.json({ scheduledRestart: !!scheduledRestart });
});

module.exports = router;