import express from "express";
import path from "path";
import bodyParser from 'body-parser'
import * as fs from "fs";
import { fileURLToPath } from 'url';
import fileUpload from 'express-fileupload'

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const staticDir = path.resolve(__dirname, "test");
const publicDir = path.resolve(__dirname, "../dist");

let startup = false;



export async function createServer(port) {
  if (startup) {
    return;
  }

  const app = express();
  app.use(express.static(staticDir));
  console.log(publicDir)
  app.use(express.static(publicDir));
  app.use(bodyParser({ limit: '200mb' }))
  app.use(fileUpload({createParentPath: true}))
  app.listen(port);
  startup = true;

  app.use((req, res, next) => {
    const paths = req.url.split("/")
    const scene = paths[1]
    const filename = paths[paths.length - 1]
    const p = path.resolve(staticDir, scene, "./attach", filename)


    if (req.url.includes("/upload")) {
      return next()
    } else {
      fs.writeFileSync(p, JSON.stringify(req.body))
    }
    res.json({code: 0, msg: 'ok'})
  })

  app.post("/:sceneCode/upload", (req, res) => {
    const file = (req).files.file
    const relUrl = `/attach/upload/${file.name}`
    const absUrl = path.resolve(staticDir, `./${req.params.sceneCode}/${relUrl}`)
    console.log("上传图片完成路径为", relUrl)
    file.mv(absUrl, err => {
      if (err) {
        res.status(404)
        res.json({code: 1, msg: 'ok'})
      } else {
        res.json({code: 0, msg: 'ok', data: relUrl})
      }
    })
  })

  console.log("模拟环境已开启");
}