📄 auth_action.php

<?php
require_once __DIR__ . '/inc/secure.php'; // Security bootstrap
header('Content-Type: application/json');

require_once __DIR__ . '/admin-panal/includes/db.php';

$action = $_POST['action'] ?? '';

if ($action === 'register') {
    $fullName = trim($_POST['full_name'] ?? '');
    $email    = trim($_POST['email'] ?? '');
    $password = $_POST['password'] ?? '';

    if (empty($fullName) || empty($email) || empty($password)) {
        echo json_encode(['success' => false, 'message' => 'All fields are required.']);
        exit;
    }

    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        echo json_encode(['success' => false, 'message' => 'Invalid email address.']);
        exit;
    }

    // Check if email exists
    $stmt = $pdo->prepare('SELECT id FROM customers WHERE email = ?');
    $stmt->execute([$email]);
    if ($stmt->fetch()) {
        echo json_encode(['success' => false, 'message' => 'Email address is already registered.']);
        exit;
    }

    // Create user
    $hash = password_hash($password, PASSWORD_DEFAULT);
    $stmt = $pdo->prepare('INSERT INTO customers (full_name, email, password_hash) VALUES (?, ?, ?)');
    
    try {
        if ($stmt->execute([$fullName, $email, $hash])) {
            echo json_encode(['success' => true, 'message' => 'Registration successful! You can now log in.']);
        } else {
            echo json_encode(['success' => false, 'message' => 'Registration failed. Please try again.']);
        }
    } catch (PDOException $e) {
        echo json_encode(['success' => false, 'message' => 'Database error occurred.']);
    }

} elseif ($action === 'login') {
    $email    = trim($_POST['email'] ?? '');
    $password = $_POST['password'] ?? '';

    if (empty($email) || empty($password)) {
        echo json_encode(['success' => false, 'message' => 'Email and password are required.']);
        exit;
    }

    $stmt = $pdo->prepare('SELECT id, full_name, password_hash FROM customers WHERE email = ?');
    $stmt->execute([$email]);
    $customer = $stmt->fetch(PDO::FETCH_ASSOC);

    if ($customer && password_verify($password, $customer['password_hash'])) {
        $_SESSION['customer_id'] = $customer['id'];
        $_SESSION['customer_name'] = $customer['full_name'];
        $_SESSION['customer_email'] = $email;
        echo json_encode(['success' => true, 'message' => 'Login successful!']);
    } else {
        echo json_encode(['success' => false, 'message' => 'Invalid email or password.']);
    }
} elseif ($action === 'logout') {
    unset($_SESSION['customer_id']);
    unset($_SESSION['customer_name']);
    unset($_SESSION['customer_email']);
    echo json_encode(['success' => true]);
} else {
    echo json_encode(['success' => false, 'message' => 'Invalid action.']);
}