<?php
require_once __DIR__ . '/../config.php';
$db = db();

$queries = [
    "ALTER TABLE invoices ADD COLUMN IF NOT EXISTS transaction_no VARCHAR(50) DEFAULT NULL AFTER id",
    "ALTER TABLE invoices ADD COLUMN IF NOT EXISTS is_pos TINYINT(1) DEFAULT 0",
    "ALTER TABLE invoices ADD COLUMN IF NOT EXISTS discount_amount DECIMAL(15,3) DEFAULT 0",
    "ALTER TABLE invoices ADD COLUMN IF NOT EXISTS loyalty_points_earned DECIMAL(15,3) DEFAULT 0",
    "ALTER TABLE invoices ADD COLUMN IF NOT EXISTS loyalty_points_redeemed DECIMAL(15,3) DEFAULT 0",
    "ALTER TABLE invoices ADD COLUMN IF NOT EXISTS created_by INT(11) DEFAULT NULL",
    "ALTER TABLE payments ADD COLUMN IF NOT EXISTS transaction_id INT(11) DEFAULT NULL", // To keep link if needed
    "ALTER TABLE invoices MODIFY COLUMN status ENUM('paid','unpaid','partially_paid','refunded','cancelled') DEFAULT 'unpaid'"
];

foreach ($queries as $q) {
    try {
        $db->exec($q);
        echo "Executed: $q\n";
    } catch (Exception $e) {
        echo "Error executing $q: " . $e->getMessage() . "\n";
    }
}