const express = require('express');
const router = express.Router();
const fs = require('fs');
const path = require('path');
const { getRecentLogs } = require('../db/audit');
const { getAllUsers } = require('../services/googleAdmin');

router.get('/logs', (req, res) => {
  const logs = getRecentLogs(parseInt(req.query.limit) || 200);
  res.json(logs);
});

router.get('/users', async (req, res) => {
  try {
    const users = await getAllUsers();
    res.json(users);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

router.get('/template', (req, res) => {
  const templatePath = path.join(__dirname, '../../templates/default.hbs');
  const content = fs.readFileSync(templatePath, 'utf8');
  res.json({ content });
});

router.post('/template', (req, res) => {
  const { content } = req.body;
  if (!content) return res.status(400).json({ error: 'content required' });
  const templatePath = path.join(__dirname, '../../templates/default.hbs');
  fs.writeFileSync(templatePath + '.bak', fs.readFileSync(templatePath));
  fs.writeFileSync(templatePath, content);
  res.json({ ok: true });
});

router.post('/preview', (req, res) => {
  const { templateHtml, userData } = req.body;
  try {
    const Handlebars = require('handlebars');
    Handlebars.registerHelper('if_val', function(val, options) {
      return val && val.trim() !== '' ? options.fn(this) : options.inverse(this);
    });
    const template = Handlebars.compile(templateHtml);
    const rendered = template(userData || {
      fullName: 'Jason Stedwell',
      title: 'Director of Technical Services',
      email: 'jstedwell@messagepointmedia.com',
      phone: '334-707-2550',
      cellPhone: ''
    });
    res.json({ html: rendered });
  } catch (err) {
    res.status(400).json({ error: err.message });
  }
});

module.exports = router;