<?php
declare(strict_types=1);

final class PhpMyAdminRuntimeConfig
{
    private const FILE_NAME = 'config.json';

    public static function sync(Settings $settings, string $pluginErrorLog = ''): void
    {
        $runtimeDir = rtrim($settings->adminerSsoDir(), '/');
        if ($runtimeDir === '') {
            return;
        }

        if (!is_dir($runtimeDir) && !@mkdir($runtimeDir, 0755, true) && !is_dir($runtimeDir)) {
            self::log($pluginErrorLog, 'Cannot create phpMyAdmin runtime dir: ' . $runtimeDir);
            return;
        }

        $payload = [
            'version' => 1,
            'phpmyadmin_url_path' => $settings->adminerUrlPath(),
            'phpmyadmin_public_base_url' => $settings->adminerPublicBaseUrl(),
            'ticket_dir' => $runtimeDir . '/tickets',
            'host' => 'dynamic:' . basename($settings->mysqlCredentialsFile()),
            'credentials_file' => $settings->mysqlCredentialsFile(),
            'client_bin_dir' => $settings->mysqlClientBinDir(),
            'directadmin_panel_port' => $settings->directAdminPanelPort(),
            'updated_at' => time(),
        ];

        $encoded = json_encode($payload, JSON_UNESCAPED_SLASHES);
        if (!is_string($encoded) || $encoded === '') {
            self::log($pluginErrorLog, 'Failed to encode phpMyAdmin runtime config JSON.');
            return;
        }

        $targetPath = $runtimeDir . '/' . self::FILE_NAME;
        if (@file_put_contents($targetPath, $encoded) === false) {
            self::log($pluginErrorLog, 'Failed to write phpMyAdmin runtime config: ' . $targetPath);
            return;
        }

        @chmod($targetPath, 0644);
    }

    private static function log(string $pluginErrorLog, string $message): void
    {
        if ($pluginErrorLog === '') {
            return;
        }

        $line = sprintf("[%s] PHPMYADMIN_RUNTIME_CONFIG %s\n", date('c'), $message);
        @error_log($line, 3, $pluginErrorLog);
    }
}