<?php
namespace App\Core;

use Db\Database;

class SettingsHelper {
    private static $settings = null;

    /**
     * 获取所有系统设置
     */
    public static function getAll() {
        if (self::$settings !== null) {
            return self::$settings;
        }

        try {
            $db = new Database();
            
            // 尝试查询设置（如果表不存在会抛出异常，被catch捕获）
            try {
                $settings = $db->select('system_settings', ['setting_key', 'setting_value']);
            } catch (\Exception $e) {
                // 表不存在或其他错误，返回默认值
                self::$settings = self::getDefaults();
                return self::$settings;
            }
            $result = [];
            
            foreach ($settings as $setting) {
                $result[$setting['setting_key']] = $setting['setting_value'];
            }

            // 合并默认值
            $defaults = self::getDefaults();
            foreach ($defaults as $key => $value) {
                if (!isset($result[$key])) {
                    $result[$key] = $value;
                }
            }

            self::$settings = $result;
            return $result;
        } catch (\Exception $e) {
            // 出错时返回默认值
            return self::getDefaults();
        }
    }

    /**
     * 获取单个设置值
     */
    public static function get($key, $default = '') {
        $settings = self::getAll();
        return isset($settings[$key]) ? $settings[$key] : $default;
    }

    /**
     * 获取默认设置值
     */
    private static function getDefaults() {
        return [
            'site_title' => 'PK10 Speed Racing',
            'site_description' => 'PK10 Speed Racing - Online Betting Platform',
            'site_keywords' => 'pk10, speed racing, betting, online game',
            'site_logo' => '/Static/images/logo.png',
            'site_favicon' => '/Static/css/favicon.ico',
            'site_copyright' => '© 2025 PK10 Racing. All rights reserved.'
        ];
    }

    /**
     * 清除缓存（当设置更新后调用）
     */
    public static function clearCache() {
        self::$settings = null;
    }
}