<?php
session_start();
require '../../../assets/utils/db_auth.php';
require '../../../assets/utils/classes/OrderManager.php';

$quotation_id = (int)($data['quotation_id'] ?? 0);
if (!$quotation_id) {
    exit(json_encode(['success' => 0, 'message' => 'Quotation ID required']));
}

// Load quotation — must be Accepted (status=2)
$sth = $pdo2->prepare(
    "SELECT q.*, c.contact_name
     FROM ac_quotation q
     LEFT JOIN md_contact c ON c.id = q.contact_id
     WHERE q.id = :id AND q.company_id = :cid AND q.status = 2
     LIMIT 1"
);
$sth->execute([':id' => $quotation_id, ':cid' => $company_id]);
$q = $sth->fetch(PDO::FETCH_ASSOC);

if (!$q) {
    exit(json_encode(['success' => 0, 'message' => 'Quotation not found or not in Accepted status']));
}

// Check not already converted
if ((int)$q['order_id'] > 0) {
    exit(json_encode(['success' => 0, 'message' => 'Quotation has already been converted to an order']));
}

// Map quotation items → order items (warehouse_id left 0 = to be filled by WMS)
$qt_items  = json_decode($q['items'] ?? '[]', true) ?: [];
$ord_items = [];
foreach ($qt_items as $i => $qi) {
    $ord_items[] = [
        'item_id'       => $i,
        'product_sku'   => $qi['product_sku']   ?? '',
        'product_name'  => $qi['description']   ?? '',
        'warehouse_id'  => 0,
        'zone'          => '',
        'aisle'         => '',
        'rack'          => '',
        'lot_number'    => '',
        'serial_number' => '',
        'quantity'      => (float)($qi['quantity']   ?? 0),
        'price'         => (float)($qi['unit_price']  ?? 0),
        'total_price'   => (float)($qi['total_price'] ?? 0),
        'stock_out_id'  => 0,
    ];
}

$order_data = [
    'quotation_id' => $quotation_id,
    'contact_id'   => (int)$q['contact_id'],
    'order_date'   => date('Y-m-d'),
    'items'        => $ord_items,
    'discount'     => (float)$q['discount'],
    'tax'          => (float)$q['tax'],
    'shipping_fee' => 0,
    'shipping_tracking_number' => '',
    'notes'        => $q['notes'] ?? '',
];

try {
    $new_order_id = null;

    dbTransaction($pdo2, function($pdo) use ($order_data, $company_id, $logging, $quotation_id, &$new_order_id) {
        $order        = new OrderManager($pdo, $company_id);
        $new_order_id = $order->saveOrder($order_data, $logging);

        // Mark quotation as Converted and link order_id
        $pdo->prepare(
            "UPDATE ac_quotation SET status = 5, order_id = :oid
             WHERE id = :id AND company_id = :cid"
        )->execute([':oid' => $new_order_id, ':id' => $quotation_id, ':cid' => $company_id]);
    });

    $answer['success']  = 1;
    $answer['message']  = 'Order created successfully';
    $answer['order_id'] = $new_order_id;

} catch (Exception $e) {
    $answer['message'] = $e->getMessage();
    http_response_code(400);
}

exit(json_encode($answer));