<?php
header('Content-Type: application/json');
require_once __DIR__ . '/auth_helper.php';

$data = json_decode(file_get_contents('php://input'), true);
$email = $data['email'] ?? '';
$password = $data['password'] ?? '';

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

try {
    $stmt = db()->prepare("SELECT id, email, password FROM users WHERE email = ?");
    $stmt->execute([$email]);
    $user = $stmt->fetch(PDO::FETCH_ASSOC);

    if ($user && password_verify($password, $user['password'])) {
        $_SESSION['user_id'] = $user['id'];
        $_SESSION['email'] = $user['email'];
        echo json_encode(['success' => true]);
    } else {
        echo json_encode(['success' => false, 'error' => 'Invalid email or password.']);
    }
} catch (PDOException $e) {
    echo json_encode(['success' => false, 'error' => 'Database error: ' . $e->getMessage()]);
}