-- Create pending_orders table to store invoice info before payment confirmation
CREATE TABLE IF NOT EXISTS `pending_orders` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `payment_id` varchar(255) NOT NULL,
  `order_id` varchar(255) NOT NULL,
  `drop_id` int(11) NOT NULL,
  `buyer_id` int(11) NOT NULL,
  `size` int(11) NOT NULL,
  `price_amount` decimal(10,2) NOT NULL,
  `price_currency` varchar(10) NOT NULL DEFAULT 'chf',
  `created_at` datetime NOT NULL DEFAULT current_timestamp(),
  PRIMARY KEY (`id`),
  UNIQUE KEY `payment_id` (`payment_id`),
  UNIQUE KEY `order_id` (`order_id`),
  KEY `drop_id` (`drop_id`),
  KEY `buyer_id` (`buyer_id`),
  CONSTRAINT `pending_orders_ibfk_1` FOREIGN KEY (`drop_id`) REFERENCES `drops` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
  CONSTRAINT `pending_orders_ibfk_2` FOREIGN KEY (`buyer_id`) REFERENCES `buyers` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;