<?php
require_once __DIR__ . '/../includes/app.php';
$user = require_permission('customers', 'add');

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    header('Content-Type: application/json');
    $name = trim($_POST['name'] ?? '');
    $phoneInput = trim($_POST['phone'] ?? '');
    $phone = $phoneInput === '' ? '' : normalize_oman_phone($phoneInput);
    $phoneForStorage = $phone === '' ? null : $phone;
    
    if (!$name) {
        echo json_encode(['success' => false, 'error' => tr('الاسم مطلوب', 'Name is required')]);
        exit;
    }
    if ($phoneInput !== '' && $phone === '') {
        echo json_encode(['success' => false, 'error' => tr('رقم الهاتف يجب أن يكون عمانياً من 8 خانات.', 'Phone must be an 8-digit Oman number.')]);
        exit;
    }
    if ($phone !== '' && customer_phone_exists($phone)) {
        echo json_encode(['success' => false, 'error' => tr('رقم الهاتف هذا مسجل لعميل آخر بالفعل.', 'This phone number is already assigned to another customer.')]);
        exit;
    }
    
    try {
        $pdo = db();
        $stmt = $pdo->prepare('INSERT INTO customers (name, phone, phone_normalized) VALUES (?, ?, ?)');
        $stmt->execute([$name, $phoneForStorage, $phoneForStorage]);
        $id = $pdo->lastInsertId();
        
        echo json_encode(['success' => true, 'customer' => ['id' => $id, 'name' => $name, 'phone' => $phone]]);
    } catch (Throwable $e) {
        if (is_customer_phone_unique_violation($e)) {
            echo json_encode(['success' => false, 'error' => tr('رقم الهاتف هذا مسجل لعميل آخر بالفعل.', 'This phone number is already assigned to another customer.')]);
        } else {
            echo json_encode(['success' => false, 'error' => tr('تعذر حفظ العميل حالياً.', 'Could not save the customer right now.')]);
        }
    }
    exit;
}