"use strict";

var express = require("express");
var timeout = require("connect-timeout");
var path = require("path");
var cookieParser = require("cookie-parser");
var bodyParser = require("body-parser");
var AV = require("leanengine");

// 加载云函数定义，你可以将云函数拆分到多个文件方便管理，但需要在主文件中加载它们
require("./cloud");

var app = express();

// 设置模板引擎
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "ejs");

app.use(express.static("public"));

// 设置默认超时时间
app.use(timeout("15s"));

// 加载云引擎中间件
app.use(AV.express());

app.enable("trust proxy");
// 需要重定向到 HTTPS 可去除下一行的注释。
app.use(AV.Cloud.HttpsRedirect());

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(
  AV.Cloud.CookieSession({
    secret: "my secret",
    maxAge: 3600000,
    fetchUser: true,
  })
);

app.get("/", function (req, res) {
  console.log("被Get到了！"); 
  if (req.currentUser) {
    res.redirect("/comments");
  } else {
    res.render("index", {
      ICP: process.env.ICP ? process.env.ICP : "",
      INFO: process.env.INFO ? process.env.INFO : "",
      favicon: process.env.FAVICON
        ? process.env.FAVICON
        : "https://cdn.jsdelivr.net/gh/lete114/CDN/Lete_Blog/images/favicon.ico",
    });
  }
});

// 可以将一类的路由单独保存在一个文件中
app.use("/comments", require("./routes/comments"));
app.use("/sign-up", require("./routes/sign-up"));

// 处理登录请求（可能来自登录界面中的表单）
app.post("/login", function (req, res) {
  AV.User.logIn(req.body.username, req.body.password).then(
    function (user) {
      const adminMail = process.env.BLOGGER_EMAIL || process.env.SMTP_USER;
      if (user.get("email") === adminMail) {
        res.saveCurrentUser(user); // 保存当前用户到 Cookie
        res.redirect("/comments");
      } else {
        res.redirect("/");
      }
    },
    function (error) {
      // 登录失败，跳转到登录页面
      res.redirect("/");
    }
  );
});

// 登出账号
app.get("/logout", function (req, res) {
  req.currentUser.logOut();
  res.clearCurrentUser(); // 从 Cookie 中删除用户
  res.redirect("/");
});

app.use(function (req, res, next) {
  // 如果任何一个路由都没有返回响应，则抛出一个 404 异常给后续的异常处理器
  if (!res.headersSent) {
    var err = new Error("Not Found");
    err.status = 404;
    next(err);
  }
});
// error handlers
app.use(function (err, req, res, next) {
  if (req.timedout && req.headers.upgrade === "websocket") {
    // 忽略 websocket 的超时
    return;
  }

  var statusCode = err.status || 500;
  if (statusCode === 500) {
    console.error(err.stack || err);
  }
  if (req.timedout) {
    console.error(
      "请求超时: url=%s, timeout=%d, 请确认方法执行耗时很长，或没有正确的 response 回调。",
      req.originalUrl,
      err.timeout
    );
  }
  res.status(statusCode);
  // 默认不输出异常详情
  var error = {};
  if (app.get("env") === "development") {
    // 如果是开发环境，则将异常堆栈输出到页面，方便开发调试
    error = err;
  }
  res.render("error", {
    message: err.message,
    error: error,
  });
});

app.locals.dateFormat = function (date) {
  var vDay = padWithZeros(date.getDate(), 2);
  var vMonth = padWithZeros(date.getMonth() + 1, 2);
  var vYear = padWithZeros(date.getFullYear(), 2);
  var vHour = padWithZeros(date.getHours(), 2);
  var vMinute = padWithZeros(date.getMinutes(), 2);
  var vSecond = padWithZeros(date.getSeconds(), 2);
  // return `${vYear}-${vMonth}-${vDay}`;
  return `${vYear}-${vMonth}-${vDay} ${vHour}:${vMinute}:${vSecond}`;
};

const padWithZeros = (vNumber, width) => {
  var numAsString = vNumber.toString();
  while (numAsString.length < width) {
    numAsString = "0" + numAsString;
  }
  return numAsString;
};

module.exports = app;