// 将 CommonJS 导入改为 ES 模块导入
import { getSystemDbPath } from '../db/path.js';
import { openDatabase } from '../db/utils.js';

// 获取系统配置
async function getSystemConfig() {
    try {
        const systemDb = await openDatabase(getSystemDbPath());
        const configs = await systemDb.allAsync('SELECT key, value FROM config');
        // 不要关闭连接，由连接池管理

        const configMap = {};
        configs.forEach(config => {
            configMap[config.key] = config.value;
        });
        return configMap;
    } catch (error) {
        console.error('Get system config failed:', error);
        throw error;
    }
}

// 更新系统配置
async function updateSystemConfig(config) {
    try {
        const systemDb = await openDatabase(getSystemDbPath());
        await systemDb.runAsync('BEGIN TRANSACTION');

        for (const [key, value] of Object.entries(config)) {
            await systemDb.runAsync('UPDATE config SET value = ? WHERE key = ?', [value, key]);
        }

        await systemDb.runAsync('COMMIT');
        // 不要关闭连接，由连接池管理
        return true;
    } catch (error) {
        await systemDb.runAsync('ROLLBACK');
        // 不要关闭连接，由连接池管理
        console.error('Update system config failed:', error);
        throw error;
    }
}

// 增加题库版本号
async function increaseQuestionBandVersion() {
    try {
        const systemDb = await openDatabase(getSystemDbPath());
        await systemDb.runAsync('UPDATE config SET value = value + 1 WHERE key = ?', ['question_bank_version']);
        // 不要关闭连接，由连接池管理
        return true;
    } catch (error) {
        console.error('Increase question bank version failed:', error);
        throw error;
    }
}

export {
    getSystemConfig,
    updateSystemConfig,
    increaseQuestionBandVersion
};