<?php

declare(strict_types=1);

use App\App\Bootstrap;
use App\Security\Csrf;
use App\Security\RateLimiter;
use App\Storage\JsonStore;

require dirname(__DIR__) . '/src/autoload.php';
Bootstrap::init();

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    Bootstrap::jsonResponse([
        'ok' => false,
        'message' => Bootstrap::appMessage('common.method_not_allowed'),
    ], 405);
}

$csrf = $_POST['csrf'] ?? '';
if (!Csrf::validate(is_string($csrf) ? $csrf : null)) {
    Bootstrap::jsonResponse([
        'ok' => false,
        'message' => Bootstrap::appMessage('common.invalid_csrf'),
    ], 419);
}

$honeypot = trim((string) ($_POST['website'] ?? ''));
if ($honeypot !== '') {
    Bootstrap::jsonResponse([
        'ok' => false,
        'message' => Bootstrap::appMessage('common.request_blocked'),
    ], 400);
}

$email = strtolower(trim((string) ($_POST['email'] ?? '')));
if (filter_var($email, FILTER_VALIDATE_EMAIL) === false) {
    Bootstrap::jsonResponse([
        'ok' => false,
        'message' => Bootstrap::appMessage('common.invalid_email'),
    ], 422);
}

$app = Bootstrap::config('app');
$limiter = new RateLimiter();
$ip = $_SERVER['REMOTE_ADDR'] ?? 'unknown';
$rateKey = sprintf('load:%s:%s', $ip, $email);
if (!$limiter->allow($rateKey, (int) $app['rate_limit']['requests'], (int) $app['rate_limit']['window_seconds'])) {
    Bootstrap::jsonResponse([
        'ok' => false,
        'message' => Bootstrap::appMessage('load_draft.rate_limited'),
    ], 429);
}

$store = new JsonStore();
$submission = $store->getSubmissionByEmail($email);
if ($submission !== null) {
    Bootstrap::jsonResponse([
        'ok' => true,
        'already_submitted' => true,
        'message' => Bootstrap::appMessage('load_draft.already_submitted'),
    ]);
}

$draft = $store->getDraft($email);

Bootstrap::jsonResponse([
    'ok' => true,
    'already_submitted' => false,
    'data' => $draft['form_data'] ?? [],
    'uploads' => $draft['uploads'] ?? [],
    'step' => $draft['step'] ?? 1,
    'updated_at' => $draft['updated_at'] ?? null,
]);