<?php
header('Content-Type: application/json');

require 'koneksi.php';
$c = getConnection();

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    echo json_encode(['status' => 'error', 'message' => 'Invalid request method']);
    exit;
}

$input = json_decode(file_get_contents('php://input'), true);
if (!$input && isset($_POST['username'])) {
    $input = $_POST;
}

$username = $input['username'] ?? '';
$password = $input['password'] ?? '';

if (empty($username) || empty($password)) {
    echo json_encode(['status' => 'error', 'message' => 'Username and password required']);
    exit;
}

try {
    // Check if username already exists
    $stmt = $c->prepare("SELECT id FROM users WHERE username = ?");
    $stmt->bind_param("s", $username);
    $stmt->execute();
    $result = $stmt->get_result();

    if ($result->fetch_assoc()) {
        echo json_encode(['status' => 'error', 'message' => 'Username sudah digunakan']);
        exit;
    }

    $passwordHash = password_hash($password, PASSWORD_DEFAULT);
    $stmt = $c->prepare("INSERT INTO users (username, password) VALUES (?, ?)");
    $stmt->bind_param("ss", $username, $passwordHash);

    if ($stmt->execute()) {
        echo json_encode(['status' => 'success', 'message' => 'Registrasi berhasil, silakan login']);
    } else {
        echo json_encode(['status' => 'error', 'message' => 'Gagal mendaftar akun']);
    }
} catch (mysqli_sql_exception $e) {
    http_response_code(500);
    echo json_encode([
        'status' => 'error', 
        'message' => 'Terjadi kesalahan server saat registrasi',
        'error_detail' => $e->getMessage() // Detail error SQL
    ]);
}