import { Router, Request, Response } from 'express';
import Order from '../models/Order';
import Customer from '../models/Customer';

const router = Router();

router.get('/', async (req: Request, res: Response) => {
  try {
    const { page = 1, limit = 20, status, paymentStatus } = req.query;
    const filter: any = {};
    if (status) filter.status = status;
    if (paymentStatus) filter.paymentStatus = paymentStatus;

    const orders = await Order.find(filter)
      .populate('customerId', 'name email')
      .sort({ dateOrdered: -1 })
      .limit(Number(limit))
      .skip((Number(page) - 1) * Number(limit));
    const total = await Order.countDocuments(filter);

    res.json({ orders, total, page: Number(page), limit: Number(limit) });
  } catch (err) {
    res.status(500).json({ message: 'Failed to fetch orders', error: err });
  }
});

router.post('/', async (req: Request, res: Response) => {
  try {
    const order = new Order(req.body);
    await order.save();

    await Customer.findByIdAndUpdate(order.customerId, {
      $inc: { totalOrders: 1, totalSpent: order.total },
    });

    res.status(201).json(order);
  } catch (err) {
    res.status(400).json({ message: 'Failed to create order', error: err });
  }
});

router.get('/:id', async (req: Request, res: Response) => {
  try {
    const order = await Order.findById(req.params.id).populate('customerId', 'name email');
    if (!order) return res.status(404).json({ message: 'Order not found' });
    res.json(order);
  } catch (err) {
    res.status(500).json({ message: 'Failed to fetch order', error: err });
  }
});

router.put('/:id', async (req: Request, res: Response) => {
  try {
    const order = await Order.findByIdAndUpdate(req.params.id, req.body, { new: true, runValidators: true });
    if (!order) return res.status(404).json({ message: 'Order not found' });
    res.json(order);
  } catch (err) {
    res.status(400).json({ message: 'Failed to update order', error: err });
  }
});

export default router;