import express, { Request, Response } from "express";
import http from "http";
import path from "path";
import bodyParser from "body-parser";
import fs from "fs";
const app = express();

const getWebUIKey = () => {
  console.log("Starting Server...\n");

  const publicPath = path.join(__dirname, "..", "..", "webUISetup");

  return new Promise<string>((resolve, reject) => {
    app.use(express.static(publicPath));
    app.use(express.json());
    app.use(bodyParser.json({ limit: "50mb" }));
    app.use(
      bodyParser.urlencoded({
        limit: "50mb",
        extended: true,
        parameterLimit: 50000,
      })
    );

    app.post("/submit", async (req: Request, res: Response) => {
      console.log("Response");
      await createConfigFiles(req.body.clientObj, req.body.serverObj);

      res.send();
    });

    app.get("*", (req: Request, res: Response) => {
      res.sendFile(path.join(publicPath, "index.html"));
    });

    const port = process.env.HTTP_PORT || process.env.PORT || "3000";
    const url = process.env.DOCKER ? undefined : "localhost";

    const server = http.createServer(app) as any;

    server.listen(port, () => {
      console.log(
        `\nPlease navigate to http://localhost:${port} to enter setup details\n`
      );
    });
  });
};

const awaitcreateDir = (path: any) => {
  return new Promise<void>((resolve, reject) => {
    fs.mkdir(path, () => {
      resolve();
    });
  });
};

const awaitWriteFile = (path: string, data: string) => {
  return new Promise<void>((resolve, reject) => {
    fs.writeFile(path, data, async (err: any) => {
      if (err) {
        console.log("file write error", err);
        reject();
      }

      resolve();
    });
  });
};

const createConfigFiles = async (clientObj: any, serverObj: any) => {
  await awaitcreateDir("./config");

  let totalClientString = "";
  let totalServerString = "";

  for (let currentKey in clientObj) {
    totalClientString += `${currentKey}=${clientObj[currentKey]}\n`;
  }

  for (let currentKey in serverObj) {
    totalServerString += `${currentKey}=${serverObj[currentKey]}\n`;
  }

  if (serverObj.DOCKER) {
    const combinedStrings = totalClientString + totalServerString;
    await awaitWriteFile("./docker-variables.env", combinedStrings);
  } else {
    await awaitWriteFile("./.env.production", totalClientString);
    await awaitWriteFile("./config/prod.env", totalServerString);
  }

  console.log("File(s) Created");
};

getWebUIKey();