const { getDBConnection } = require('./file-utils');

// 获取所有系统日志
function getSystemLogs() {
  try {
    const db = getDBConnection(true);
    
    const logs = db.prepare(`
      SELECT id, time, level, user, source, log
      FROM SystemLog
      ORDER BY time DESC
    `).all();
    
    return logs;
  } catch (error) {
    console.error('获取系统日志失败:', error);
    throw error;
  }
}

// 添加系统日志
function addSystemLog(logData) {
  try {
    // 验证必填字段
    if (!logData.level || !logData.source) {
      throw new Error('日志级别和来源是必填字段');
    }

    const db = getDBConnection();
    
    // 获取当前本地时间
    const now = new Date();
    const year = now.getFullYear();
    const month = String(now.getMonth() + 1).padStart(2, '0');
    const day = String(now.getDate()).padStart(2, '0');
    const hours = String(now.getHours()).padStart(2, '0');
    const minutes = String(now.getMinutes()).padStart(2, '0');
    const seconds = String(now.getSeconds()).padStart(2, '0');
    const localDateTime = `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;

    // 在插入日志时添加时间
    const result = db.prepare(`
      INSERT INTO SystemLog (level, user, source, log, time)
      VALUES (?, ?, ?, ?, ?)
    `).run(
      logData.level,
      logData.user || null,
      logData.source,
      logData.log || null,
      localDateTime
    );

    if (result.changes > 0) {
      return {
        success: true,
        id: result.lastInsertRowid,
        message: '系统日志添加成功'
      };
    } else {
      throw new Error('系统日志添加失败');
    }
  } catch (error) {
    console.error('添加系统日志失败:', error);
    throw error;
  }
}

module.exports = {
  getSystemLogs,
  addSystemLog
};