<?php
declare(strict_types=1);

require __DIR__ . '/bootstrap.php';
require __DIR__ . '/mailer.php';

function requireDebugAccess(): void
{
    $token = trim((string) ($_GET['access'] ?? $_POST['access'] ?? ''));
    $config = loadAppConfig();
    if ($token === '' || $token !== ($config['accessToken'] ?? '')) {
        jsonError('无权访问，请在 URL 中携带 ?access=访问令牌', 403);
    }
}

function checkWritableDir(string $dir): array
{
    if (!is_dir($dir)) {
        return ['ok' => false, 'message' => '目录不存在'];
    }
    if (!is_writable($dir)) {
        return ['ok' => false, 'message' => '目录不可写，请检查权限'];
    }
    $testFile = $dir . '/.write_test_' . uniqid();
    $written = @file_put_contents($testFile, 'ok');
    if ($written === false) {
        return ['ok' => false, 'message' => '无法写入测试文件'];
    }
    @unlink($testFile);
    return ['ok' => true, 'message' => '可写'];
}

if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    requireDebugAccess();

    $dataDir = checkWritableDir(DATA_DIR);
    $submissions = readSubmissions();
    $mailConfig = loadMailConfig();
    $recipients = getMailRecipients($mailConfig);

    jsonResponse([
        'ok' => true,
        'time' => date('Y-m-d H:i:s'),
        'phpVersion' => PHP_VERSION,
        'assetVersion' => getAssetVersion(),
        'extensions' => [
            'json' => extension_loaded('json'),
            'openssl' => extension_loaded('openssl'),
            'session' => extension_loaded('session'),
        ],
        'paths' => [
            'root' => ROOT_DIR,
            'dataDir' => DATA_DIR,
            'submissionsFile' => SUBMISSIONS_FILE,
            'mailConfig' => MAIL_CONFIG_FILE,
        ],
        'dataDir' => $dataDir,
        'submissions' => [
            'count' => count($submissions),
            'fileExists' => is_file(SUBMISSIONS_FILE),
            'last' => $submissions !== [] ? end($submissions) : null,
        ],
        'mail' => [
            'enabled' => !empty($mailConfig['enabled']),
            'recipientCount' => count($recipients),
            'recipients' => $recipients,
            'smtpHost' => $mailConfig['smtp']['host'] ?? '',
        ],
        'apiUrls' => [
            'config' => 'api/config.php',
            'doctors' => 'api/doctors.php',
            'submit' => 'api/submit.php',
            'diagnostics' => 'api/diagnostics.php',
        ],
    ]);
}

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    jsonError('方法不允许', 405);
}

requireDebugAccess();

$action = trim((string) ($_GET['action'] ?? 'submit'));

if ($action === 'mail') {
    $submissions = readSubmissions();
    if ($submissions === []) {
        jsonError('暂无提交记录，无法测试邮件');
    }
    $sent = sendSubmissionMail($submissions);
    if (!$sent) {
        jsonError('邮件发送失败，请查看服务器 PHP 错误日志', 500);
    }
    jsonResponse(['ok' => true, 'message' => '测试邮件已发送', 'count' => count($submissions)]);
}

if ($action === 'submit') {
    $suffix = date('His');
    $record = [
        'id' => uniqid('debug_', true),
        'createdAt' => date('c'),
        'doctorId' => 'song',
        'doctorName' => '宋崇升',
        'nickname' => '调试用户' . $suffix,
        'gender' => '男',
        'contact' => '1380013' . str_pad((string) random_int(0, 9999), 4, '0', STR_PAD_LEFT),
        'description' => '这是一条调试提交 ' . date('Y-m-d H:i:s'),
    ];

    $submissions = readSubmissions();
    $submissions[] = $record;

    if (!saveSubmissions($submissions)) {
        jsonError(getSaveSubmissionsError(), 500);
    }

    $mailSent = sendSubmissionMail($submissions);

    jsonResponse([
        'ok' => true,
        'message' => '调试提交成功',
        'record' => $record,
        'total' => count($submissions),
        'mailSent' => $mailSent,
    ]);
}

jsonError('未知操作');