const express = require('express');
const multer = require('multer');
const path = require('path');
const { register, me, updateMe, removeMe, exchangeZohoToken } = require('../controllers/userController');
const auth = require('../middlewares/auth');
const { registerSchema, updateSchema } = require('../validators/userValidator');
const Joi = require('joi');

const router = express.Router();

const storage = multer.diskStorage({
  destination: (req, file, cb) => cb(null, path.join(process.cwd(), 'uploads')),
  filename: (req, file, cb) => cb(null, `${Date.now()}-${file.originalname}`)
});
const upload = multer({ storage });

function validate(schema) {
  return (req, res, next) => {
    const toValidate = req.method === 'GET' ? req.query : req.body;
    const { error, value } = schema.validate(toValidate, { abortEarly: false, stripUnknown: true });
    if (error) {
      return res.status(400).json({ status: 'error', message: 'Validation failed', errorCode: 'VALIDATION_ERROR', details: error.details, timestamp: new Date().toISOString() });
    }
    if (req.method === 'GET') req.query = value; else req.body = value;
    next();
  };
}

router.post('/register', validate(registerSchema), register);
router.get('/me', auth, me);
router.put('/me', auth, upload.single('profilePicture'), validate(updateSchema), updateMe);
router.delete('/me', auth, removeMe);

// OAuth token exchange (Zoho request currently)
const zohoTokenSchema = Joi.object({
  authorization_code: Joi.string().required(),
  id: Joi.number().required(),
  service_name: Joi.string().valid('zoho', 'keka', 'bamboohr', 'hubspot', 'other').required()
});
router.post('/zoho/token', auth, validate(zohoTokenSchema), exchangeZohoToken);

module.exports = router;