const fs = require("node:fs");
const express = require("express");
const app = express();
const port = 7788;
const data = "./data.json";

app.use(express.json());

// Add Access Control Allow Origin headers
app.use((req, res, next) => {
  res.setHeader("Access-Control-Allow-Origin", "*");
  res.header(
    "Access-Control-Allow-Headers",
    "Origin, X-Requested-With, Content-Type, Accept",
  );
  next();
});

app.get("/api/text", (req, res) => {
  fs.readFile("data.json", "utf8", (err, data) => {
    if (err) {
      res.send(err);
      return;
    }
    res.send(data);
  });
});

app.post("/api/add", (req, res) => {
  let content = {};
  if (req.body) {
    content = req.body;
  } else {
    console.log("AAAA");
    res.send("ERROR: NO BODY SPECIFIED");
    return;
  }
  let text = content.text;

  fs.readFile("data.json", "utf8", (err, data) => {
    if (err) {
      res.send(err);
      return;
    }
    let array = JSON.parse(data)["text-array"];
    array.push(text);
    let arrjson = '{"text-array": [';
    for (let i in array) {
      if (i == array.length - 1) {
        arrjson += '"' + array[i] + '"';
      } else {
        arrjson += '"' + array[i] + '",';
      }
    }
    arrjson += "]}";

    fs.writeFileSync("data.json", arrjson);

    res.send(text);
  });
});

app.post("/api/remove", (req, res) => {
  let content = {};
  if (req.body) {
    content = req.body;
  } else {
    res.send("ERROR: NO BODY SPECIFIED");
    return;
  }
  let id = content.id;
  console.log(id);

  fs.readFile("data.json", "utf8", (err, data) => {
    if (err) {
      res.send(err);
      return;
    }
    let array = JSON.parse(data)["text-array"];
    array.splice(id, 1);
    let arrjson = '{"text-array": [';
    for (let i in array) {
      if (i == array.length - 1) {
        arrjson += '"' + array[i] + '"';
      } else {
        arrjson += '"' + array[i] + '",';
      }
    }
    arrjson += "]}";
    fs.writeFileSync("data.json", arrjson);
  });

  res.send("Removed element at id: " + id);
});

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