const dayjs = require("dayjs");
const fs = require("fs");
const path = require("path");

let formatText = {
  request: function (req) {
    let logText = new String();
    let method = req.method;
    //访问方法
    logText += "request method: " + method + "\n";
    //请求原始地址
    logText += "request originalUrl:  " + req.originalUrl + "\n";
    //客户端ip
    logText += "request client ip:  " + req.ip + "\n";

    //请求参数
    if (method === "GET") {
      logText += "request query:  " + JSON.stringify(req.query) + "\n";
    } else {
      logText += "request body: " + "\n" + JSON.stringify(req.body) + "\n";
    }

    return logText;
  },

  handle: (info) => {
    let logText = new String();
    //响应日志开始
    logText += "\n" + `***************info log start ***************日志记录时间： ${dayjs().format("YYYY.MM.DD HH:mm:ss")}` + "\n";
    //响应内容
    logText += "\n" + info + "\n";
    //响应日志结束
    logText += "*************** info log end ***************************************************************************" + "\n";
    return logText;
  },
  error: (ctx, err) => {
    let logText = new String();
    //错误信息开始
    logText += "\n" + `*************** error log start ***************日志记录时间： ${dayjs().format("YYYY.MM.DD HH:mm:ss")}` + "\n";
    //添加请求日志
    logText += formatText.request(ctx.request);
    //错误名称
    logText += "err name: " + err.name + "\n";
    //错误信息
    logText += "err message: " + err.message + "\n";
    //错误详情
    logText += "err stack: " + err.stack + "\n";
    //错误信息结束
    logText += "*************** error log end ***************************************************************************" + "\n";
    return logText;
  },
};

const writeLog = (msg, type) => {
  console.log(msg);

  let pathDir = path.join(__dirname, "../logs");
  if (!fs.existsSync(pathDir)) {
    fs.mkdirSync(pathDir);
  }

  let fileName = dayjs().format("log_YYYY.MM.DD.log");

  if (type === "error") {
    fileName = dayjs().format("logError_YYYY.MM.DD.log");
  }

  let fileFullPath = path.join(pathDir, fileName);

  if (fs.existsSync(fileFullPath)) {
    fs.appendFileSync(fileFullPath, msg);
  } else {
    fs.writeFileSync(fileFullPath, msg);
  }
};

module.exports = {
  //封装操作日志
  log: (msg, data) => {
    let msgTotal = msg;

    if (data) {
      if (typeof data === "object") {
        msgTotal += ":" + JSON.stringify(data);
      } else {
        msgTotal += ":" + data;
      }
    }

    let msgStr = formatText.handle(msgTotal);
    writeLog(msgStr);
  },

  errError(msg) {
    let msgStr = formatText.handle(msg);
    writeLog(msgStr, "error");
  },
  //封装错误日志
  ctxError: (error, ctx) => {
    if (ctx && error) {
      let msg = formatText.error(ctx, error);
      writeLog(msg, "error");
    }
  },
};