import express from "express";
import fileUpload from "express-fileupload";
import bodyParser from "body-parser";
import cors from "cors";

import authors from "./router/authors/index.js";
import authorsLogin from "./router/authors/login.js";
import books from "./router/books/index.js";
import files from "./router/files/index.js";
import record from "./router/record/index.js";
import moreRecord from "./router/record/more.js";
import types from "./router/types/index.js";

import { generateToken, verifyToken } from "#utils";

const port = 3000;
const app = express();
const json = express.json({ type: "*/json" });

// 全局启用 CORS
const corsOptions = {
  origin: "http://localhost:3032", // 仅允许这个来源
  methods: ["GET", "POST", "PUT", "DELETE"], // 允许的 HTTP 方法
  allowedHeaders: ["Content-Type", "Authorization"], // 允许的头部
};
app.use(cors(corsOptions));
app.use(fileUpload());
app.use(json);
app.use(bodyParser.urlencoded({ extended: false }));

// Helper function to validate referer
function isValidReferer(referer) {
  return (
    referer.indexOf("zs_interval") > -1 && referer.indexOf("/api/v1/files") > -1 || referer.indexOf('api_files_') > -1
  );
}

// Helper function to extract `file_id` from referer
function extractFileId(referer) {
  const match = referer.match(/api_files_([^/]+)/); // 正则匹配 `file_id`
  return match ? match[1] : null;
}

// middleware that is specific to this router
app.use(async function timeLog(req, res, next) {
  if (isValidReferer(req.url)) {
    const fileId = extractFileId(req.url);
    if (fileId) {
      return res.redirect(`/api/v1/files/${fileId}`);
    } else {
      console.error("File ID not found in referer");
    }
  }
  next();
});

// 静态文件目录，添加前缀路径 /static
app.use("/static", express.static("public"));

app.get("/", (req, res) => {
  res.send("Hello World! " + req.url);
});

app.use("/api/v1/login", authors);
app.use("/api/v1/files", files);

app.use("/api/v1/*", verifyToken); // 注册token验证中间件

app.use("/api/v1/auth", authorsLogin);
app.use("/api/v1/books", books);
app.use("/api/v1/record", record);
app.use("/api/v1/more_record", moreRecord);
app.use("/api/v1/types", types);

app.listen(port, () => {
  console.log(`Example app listening on port ${port}`);
});