'use strict';

const { createClient } = require('@clickhouse/client');

module.exports = (app, conf) => {
   if (conf.clickHouse) {
      try {
         app.fs = app.fs || {};
         app.fs.clickHouse = {};

         // 移除 debug，只保留必要的配置
         const { url, user, password, db = [] } = conf.clickHouse;

         if (!url) {
            throw new Error('CLICKHOUST_URL (完整 URL) is required! e.g., http://127.0.0.1:8123');
         }

         for (let d of db) {
            if (d.name && d.db) {
               app.fs.clickHouse[d.name] = createClient({
                  url: url,
                  username: user,
                  password: password,
                  database: d.db,
                  // 调试日志通过环境变量 NODE_DEBUG=clickhouse 控制
               });

               console.info(`ClickHouse ${d.name} 初始化完成`);
            } else {
               throw new Error(`conf.clickHouse 参数错误！db 配置必须包含 name 和 db: ${JSON.stringify(d)}`);
            }
         }
      } catch (error) {
         console.error('初始化 ClickHouse 客户端失败:', error);
         process.exit(-1);
      }
   }
};