<?php
/**
 * Minimal executable harness for OAuth transaction, proxy, URL, and secret behavior.
 */

declare(strict_types=1);

namespace {

define('ABSPATH', __DIR__ . '/');
define('MINUTE_IN_SECONDS', 60);
define('MONTH_IN_SECONDS', 2592000);
define('ARRAY_A', 'ARRAY_A');

$GLOBALS['wp_options'] = [];
$GLOBALS['wp_cache'] = [];
$GLOBALS['captcha_enabled'] = true;

function aksrt_is_captcha_enabled_for(string $scene): bool { return $scene === 'bind' && !empty($GLOBALS['captcha_enabled']); }
function __(string $text, string $domain = ''): string { return $text; }
function sanitize_key(string $value): string { return preg_replace('/[^a-z0-9_\-]/', '', strtolower($value)) ?? ''; }
function sanitize_text_field(string $value): string { return trim(strip_tags($value)); }
function esc_url_raw(string $value): string { return trim($value); }
function wp_unslash($value) { return $value; }
function wp_parse_url(string $url) { return parse_url($url); }
function wp_generate_uuid4(): string { return '00000000-0000-4000-8000-' . substr(bin2hex(random_bytes(6)), 0, 12); }
function wp_salt(string $scheme = 'auth'): string { return 'harness-salt-' . $scheme; }
function is_ssl(): bool { return true; }
function maybe_serialize($value): string { return serialize($value); }
function maybe_unserialize($value) { $result = @unserialize((string) $value); return $result === false && $value !== serialize(false) ? $value : $result; }
function wp_cache_delete(string $key, string $group = ''): void { unset($GLOBALS['wp_cache'][$group][$key]); }
function get_option(string $key, $default = false) { return array_key_exists($key, $GLOBALS['wp_options']) ? $GLOBALS['wp_options'][$key] : $default; }
function add_option(string $key, $value, string $deprecated = '', bool $autoload = true): bool {
	if (array_key_exists($key, $GLOBALS['wp_options'])) return false;
	$GLOBALS['wp_options'][$key] = $value;
	return true;
}
function update_option(string $key, $value, $autoload = null): bool {
	$changed = !array_key_exists($key, $GLOBALS['wp_options']) || $GLOBALS['wp_options'][$key] !== $value;
	$GLOBALS['wp_options'][$key] = $value;
	return $changed;
}
function delete_option(string $key): bool {
	if (!array_key_exists($key, $GLOBALS['wp_options'])) return false;
	unset($GLOBALS['wp_options'][$key]);
	return true;
}
function get_template_directory_uri(): string { return 'https://example.com/theme'; }
function get_theme_file_uri(string $path = ''): string { return 'https://example.com/theme/' . ltrim($path, '/'); }
function get_theme_file_path(string $path = ''): string { return dirname(__DIR__, 2) . '/' . ltrim($path, '/'); }
function sanitize_email(string $value): string { return filter_var($value, FILTER_VALIDATE_EMAIL) ? $value : ''; }
function esc_html__(string $value, string $domain = ''): string { return $value; }

final class HarnessWpdb {
	public string $options = 'wp_options';
	public function prepare(string $query, ...$args): array { return [$query, $args]; }
	public function esc_like(string $value): string { return $value; }
	public function query($prepared): int {
		[$query, $args] = $prepared;
		if (str_starts_with(ltrim($query), 'DELETE')) {
			[$key, $serialized] = $args;
			if (!array_key_exists($key, $GLOBALS['wp_options']) || serialize($GLOBALS['wp_options'][$key]) !== $serialized) return 0;
			unset($GLOBALS['wp_options'][$key]);
			return 1;
		}
		if (str_starts_with(ltrim($query), 'UPDATE')) {
			[$new, $key, $old] = $args;
			if (!array_key_exists($key, $GLOBALS['wp_options']) || serialize($GLOBALS['wp_options'][$key]) !== $old) return 0;
			$GLOBALS['wp_options'][$key] = unserialize($new);
			return 1;
		}
		return 0;
	}
	public function get_results($prepared, $format): array { return []; }
}
$GLOBALS['wpdb'] = new HarnessWpdb();
}

namespace AKSRT\Settings {
	final class Settings {
		public static function flush_settings_cache(): void {}
		public static function sync_native_site_icon(string $value): void {}
	}
}

namespace {
	require dirname(__DIR__, 2) . '/src/Auth/OAuthTransactionStore.php';
	require dirname(__DIR__, 2) . '/src/Auth/OAuthUrlPolicy.php';
	require dirname(__DIR__, 2) . '/src/Auth/OAuthProxyProtocol.php';
	require dirname(__DIR__, 2) . '/src/Auth/OAuth.php';
	require dirname(__DIR__, 2) . '/src/Admin/Schema/SchemaUsers.php';
	require dirname(__DIR__, 2) . '/src/Admin/SchemaProvider.php';

	function check(bool $condition, string $message): void {
		if (!$condition) throw new RuntimeException($message);
	}

	$_COOKIE['aksrt_oauth_browser'] = str_repeat('A', 43);
	$token = \AKSRT\Auth\OAuthTransactionStore::issue('direct', ['provider' => 'github'], 60, true);
	check(\AKSRT\Auth\OAuthTransactionStore::peek($token, 'direct', true) !== null, 'transaction peek failed');
	check(\AKSRT\Auth\OAuthTransactionStore::peek($token, 'other', true) === null, 'transaction kind mismatch accepted');
	$_COOKIE['aksrt_oauth_browser'] = str_repeat('B', 43);
	check(\AKSRT\Auth\OAuthTransactionStore::claim($token, 'direct', true) === null, 'wrong browser claimed transaction');
	$_COOKIE['aksrt_oauth_browser'] = str_repeat('A', 43);
	check(\AKSRT\Auth\OAuthTransactionStore::claim($token, 'direct', true) !== null, 'valid browser failed claim');
	check(\AKSRT\Auth\OAuthTransactionStore::claim($token, 'direct', true) === null, 'transaction replay accepted');

	$bindPass = \AKSRT\Auth\OAuthTransactionStore::issue('oauth_bind_pass', ['user_id' => 17, 'provider' => 'github'], 300, true);
	check(\AKSRT\Auth\OAuth::validate_bind_pass($bindPass, 'github', 17, false), 'valid bind pass peek failed');
	check(!\AKSRT\Auth\OAuth::validate_bind_pass($bindPass, 'gitee', 17, true), 'wrong bind provider consumed as valid');
	check(!\AKSRT\Auth\OAuth::validate_bind_pass($bindPass, 'github', 18, true), 'wrong bind user consumed as valid');
	check(\AKSRT\Auth\OAuth::validate_bind_pass($bindPass, 'github', 17, true), 'valid bind pass claim failed after rejected mismatches');
	check(!\AKSRT\Auth\OAuth::validate_bind_pass($bindPass, 'github', 17, true), 'bind pass replay accepted');
	$GLOBALS['captcha_enabled'] = false;
	check(\AKSRT\Auth\OAuth::validate_bind_pass('', 'github', 17, true), 'disabled bind captcha required a pass');
	$GLOBALS['captcha_enabled'] = true;

	$expired = \AKSRT\Auth\OAuthTransactionStore::issue('direct', [], 30, true);
	foreach ($GLOBALS['wp_options'] as $key => $row) {
		if (is_array($row) && ($row['kind'] ?? '') === 'direct') $GLOBALS['wp_options'][$key]['expires_at'] = time() - 1;
	}
	check(\AKSRT\Auth\OAuthTransactionStore::peek($expired, 'direct', true) === null, 'expired transaction accepted');

	$request = [
		'v' => '2', 'request_id' => str_repeat('C', 43), 'provider' => 'github', 'action' => 'login',
		'agent_back_url' => 'https://example.com/oauth/proxy/callback/', 'ts' => (string) time(),
	];
	$secret = 'test-secret-value';
	$requestSign = \AKSRT\Auth\OAuthProxyProtocol::sign_request($request, $secret);
	check(\AKSRT\Auth\OAuthProxyProtocol::verify_request($request, $secret, $requestSign), 'request signature failed');
	check(!\AKSRT\Auth\OAuthProxyProtocol::verify_callback($request, $secret, $requestSign), 'direction-separated HMAC failed');
	$tampered = $request; $tampered['provider'] = 'qq';
	check(!\AKSRT\Auth\OAuthProxyProtocol::verify_request($tampered, $secret, $requestSign), 'tampered request accepted');
	check(!\AKSRT\Auth\OAuthProxyProtocol::timestamp_valid((string) (time() - 1000)), 'expired timestamp accepted');

	check(\AKSRT\Auth\OAuthUrlPolicy::public_https('http://example.com') === '', 'HTTP URL accepted');
	check(\AKSRT\Auth\OAuthUrlPolicy::public_https('https://user@example.com') === '', 'userinfo URL accepted');
	check(\AKSRT\Auth\OAuthUrlPolicy::public_https('https://127.0.0.1') === '', 'loopback URL accepted');
	check(\AKSRT\Auth\OAuthUrlPolicy::public_https('https://10.0.0.1') === '', 'private URL accepted');
	check(\AKSRT\Auth\OAuthProxyProtocol::callback_url('https://example.com/wrong') === '', 'wrong callback path accepted');

	$provider = \AKSRT\Admin\SchemaProvider::get_instance();
	$base = $provider->get_defaults('users', 'oauth');
	$base['oauth_s'] = true;
	$base['oauth_weixingzh_s'] = true;
	$base['weixingzh_gzh_type'] = 'service';
	$base['weixingzh_appid'] = 'appid';
	$base['weixingzh_appsecret'] = 'secret';
	$base['weixingzh_token'] = '***';
	$GLOBALS['wp_options']['aksrt_settings'] = [];
	check(!$provider->validate('users', $base, 'oauth')['valid'], 'masked missing token treated as configured');
	$GLOBALS['wp_options']['aksrt_settings'] = ['weixingzh_token' => 'stored-token'];
	check($provider->validate('users', $base, 'oauth')['valid'], 'stored token not preserved by mask validation');

	$provider->write_settings('users', ['weixingzh_token' => '***'], 'oauth');
	check($GLOBALS['wp_options']['aksrt_settings']['weixingzh_token'] === 'stored-token', 'masked token overwrote stored secret');
	$provider->write_settings('users', ['weixingzh_token' => 'replacement'], 'oauth');
	check($GLOBALS['wp_options']['aksrt_settings']['weixingzh_token'] === 'replacement', 'new token failed to replace secret');
	$provider->write_settings('users', ['__clear_secrets' => ['weixingzh_token']], 'oauth');
	check(!isset($GLOBALS['wp_options']['aksrt_settings']['weixingzh_token']), 'explicit secret clear failed');
	$GLOBALS['wp_options']['aksrt_settings']['weixingzh_token'] = 'final-token';
	$clearData = $base;
	$clearData['weixingzh_token'] = '***';
	$clearData['__clear_secrets'] = ['weixingzh_token'];
	check(!$provider->validate('users', $clearData, 'oauth')['valid'], 'active provider allowed required secret clear');
	check($provider->read_settings('users', 'oauth')['weixingzh_token'] === '***', 'secret read was not masked');

	echo "OAuth security harness passed.\n";
}