import { Router, Request, Response } from 'express';
import { pool } from '../db';

const router = Router();

router.get('/', async (_req: Request, res: Response) => {
  const { rows } = await pool.query(`
    SELECT
      c.id, c.email, c.name, c.email_verified, c.marketing_consent, c.created_at,
      COUNT(o.id) FILTER (WHERE o.status = 'completed') AS order_count,
      COALESCE(SUM(o.amount_cents) FILTER (WHERE o.status = 'completed'), 0) AS total_spent_cents,
      MAX(o.created_at) AS last_order_at
    FROM customers c
    LEFT JOIN orders o ON o.customer_id = c.id
    GROUP BY c.id
    ORDER BY c.created_at DESC
  `);
  res.json(rows);
});

router.get('/:id', async (req: Request, res: Response) => {
  const { rows: customerRows } = await pool.query(
    `SELECT id, email, name, email_verified, marketing_consent, marketing_consent_at, created_at
     FROM customers WHERE id = $1`,
    [req.params.id]
  );
  if (!customerRows.length) return res.status(404).json({ error: 'not found' });

  const { rows: orderRows } = await pool.query(
    `SELECT o.id, o.processor, o.processor_order_id, o.amount_cents, o.status, o.created_at, i.name AS item_name
     FROM orders o JOIN items i ON i.id = o.item_id
     WHERE o.customer_id = $1
     ORDER BY o.created_at DESC`,
    [req.params.id]
  );

  res.json({ customer: customerRows[0], orders: orderRows });
});

export default router;