<?php
declare(strict_types=1);

require __DIR__ . '/common.php';

kapvoe_require_post();
$config = kapvoe_load_config();
$data = kapvoe_json_input();

$required = [
    'product_code',
    'product_name',
    'price',
    'quantity',
    'customer_name',
    'address',
    'postal_code',
    'city',
    'province',
    'phone',
    'email',
];
$errors = kapvoe_validate_required($data, $required);

if (!filter_var((string)($data['email'] ?? ''), FILTER_VALIDATE_EMAIL)) {
    $errors['email'] = 'Correu electrònic invàlid';
}
if (!preg_match('/^\d{5}$/', (string)($data['postal_code'] ?? ''))) {
    $errors['postal_code'] = 'Codi postal invàlid';
}
if (!preg_match('/^[0-9+\s]{8,20}$/', (string)($data['phone'] ?? ''))) {
    $errors['phone'] = 'Telèfon invàlid';
}

$price = (float)str_replace(',', '.', (string)$data['price']);
$quantity = max(1, (int)$data['quantity']);

if ($price <= 0) {
    $errors['price'] = 'Preu invàlid';
}

if ($errors) {
    kapvoe_json_response(['ok' => false, 'errors' => $errors], 422);
}

$orderId = 'ORD-' . date('Ymd-His') . '-' . substr(bin2hex(random_bytes(3)), 0, 6);
$unitAmountCents = (int)round($price * 100);

$payload = [
    'order_id' => $orderId,
    'product_code' => trim((string)$data['product_code']),
    'product_name' => trim((string)$data['product_name']),
    'unit_amount_cents' => $unitAmountCents,
    'quantity' => $quantity,
    'customer_name' => trim((string)$data['customer_name']),
    'address' => trim((string)$data['address']),
    'postal_code' => trim((string)$data['postal_code']),
    'city' => trim((string)$data['city']),
    'province' => trim((string)$data['province']),
    'phone' => trim((string)$data['phone']),
    'email' => trim((string)$data['email']),
];

try {
    $session = kapvoe_create_checkout_session($config, $payload);

    kapvoe_append_order($config, [
        'order_id' => $orderId,
        'created_at' => date('Y-m-d H:i:s'),
        'product_code' => $payload['product_code'],
        'product_name' => $payload['product_name'],
        'unit_price' => $price,
        'quantity' => $quantity,
        'customer_name' => $payload['customer_name'],
        'address' => $payload['address'],
        'postal_code' => $payload['postal_code'],
        'city' => $payload['city'],
        'province' => $payload['province'],
        'phone' => $payload['phone'],
        'email' => $payload['email'],
        'payment_status' => 'pending',
        'stripe_session_id' => $session['id'] ?? '',
        'payment_intent_id' => '',
    ]);

    kapvoe_json_response([
        'ok' => true,
        'checkout_url' => $session['url'] ?? null,
        'order_id' => $orderId,
    ]);
} catch (Throwable $e) {
    kapvoe_json_response([
        'ok' => false,
        'error' => $e->getMessage(),
    ], 500);
}