import express from "express";
import fs from "fs";
import cookieParser from "cookie-parser";
import bodyParser from "body-parser";
import Pino from "express-pino-logger";
import cors from "cors";
import { port, trustProxy } from "./config";
import {
  formatResponse,
  formatResponseError,
  publishMessage,
} from "./libs/Format";

let currentSongId = "";
let currentSong = {};

const pino = new Pino({
  prettyPrint: true,
});
pino.logger.info(`Server started on port ${port}`);

const app = express();

app.use(cors());
app.use(pino);

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(cookieParser());

app.set("trust proxy", trustProxy);

// Get last saved song id on load
fs.readFile("./currentSongId", "utf8", (err, data) => {
  if (!err) {
    currentSongId = data;
  }
});

app.post("/post", function (req, res, next) {
  if (req.body && req.body.now_playing && req.body.now_playing.song) {
    const newSongId = req.body.now_playing.song.id;
    if (newSongId !== currentSongId) {
      currentSongId = newSongId;
      currentSong = req.body.now_playing.song;
      fs.writeFile("./currentSongId", currentSongId, (err) => {
        if (err) {
          req.log.error(err);
        }
      });
      publishMessage(req.body.now_playing, req.log, (err, response) => {
        if (err) {
          req.log.error(err);
        }
        formatResponse(req, res, next, err, response);
      });
    }
  } else {
    formatResponseError(res, new Error("Missing now_playing object"));
  }
});

app.get("/current", function (req, res, next) {
  formatResponse(req, res, next, null, currentSong);
});

// Gestion des erreurs
app.use((err, req, res, next) => {
  res.error = err;
  if (res.headersSent) {
    next(err);
  } else {
    formatResponseError(res, err);
  }
});

module.exports = app;