const express = require('express');
const fs = require('fs');
const path = require('path');
const router = express.Router();
const fileUpload = require('express-fileupload');
const authMiddleware = require('../../../Middlewares/authMiddleware');
const { loggers } = require('winston');
const ncp = require('ncp').ncp;
const configFile = fs.readFileSync(path.join(__dirname, '../../../data', 'setup.json'), 'utf-8')
const config = JSON.parse(configFile);
const bodyParser = require('body-parser');
const crypto = require('crypto');
const os = require('os');
const { getUserData, getSetupData } = require('../../../Middlewares/watcherMiddleware');
const { logger, logRequestInfo, ErrorLogger, authLogger } = require('../../../config/logs');

let setupData = getSetupData();
let userData = getUserData();
router.use(bodyParser.json());

function authenticateToken(req, res, next) {
    let token = null;
    const authHeader = req.headers['authorization'];
  
    if (authHeader) {
      token = authHeader.split(' ')[1];
    } else if (req.query.token) {
      token = req.query.token;
    }
  
    if (token == null) {
      if (req.user) {
        return next();
      } else {
        return res.status(401).json({ message: 'Unauthorized' });
      }
    }
  
    fs.readFile(path.join(__dirname, '../../../data', 'user.json'), 'utf8', (err, data) => {
      if (err) {
        console.error('Error reading user.json:', err);
        return res.status(401).json({ message: 'Unauthorized' });
      }
  
      const users = JSON.parse(data);
  
      const user = users.find(u => u.token === token);
  
      if (user) {
        req.user = user;
        req.userData = user;
        next();
    } else {
        return res.status(401).json({ message: 'Unauthorized' });
    }
    });
  }

router.get('/', (req, res) => {
    res.status(400).json({ error: 'Bad Request. The request cannot be fulfilled due to bad syntax or missing parameters.' });
});

router.post('/', authenticateToken, (req, res) => {
    const userId = req.userData.name;
    const { filename } = req.body;

    if (!userId || !filename) {
        return res.status(400).json({ message: 'User ID or filename missing for file deletion.' });
    }

    const userFolderPath = path.join('cdn-files', userId);

    function findAndDeleteFile(folderPath) {
        const filesInFolder = fs.readdirSync(folderPath);

        for (const file of filesInFolder) {
            const filePath = path.join(folderPath, file);

            if (!filePath.startsWith(userFolderPath)) {
                return false;
            }

            if (fs.statSync(filePath).isDirectory()) {
                const fileDeletedInSubfolder = findAndDeleteFile(filePath);
                if (fileDeletedInSubfolder) {
                    return true;
                }
            } else if (file === filename) {
                try {
                    fs.unlinkSync(filePath);
                    return true;
                } catch (error) {
                    return false;
                }
            }
        }

        return false;
    }

    const fileDeleted = findAndDeleteFile(userFolderPath);

    if (fileDeleted) {
        res.status(200).json({ status: 'success', message: 'The file has been successfully deleted.' });
    } else {
        res.status(404).json({ status: 'error', message: 'The file you are trying to delete does not exist.' });
    }
});

const ncpAsync = (source, destination) => {
    const userFolderPath = path.join('cdn-files', userId);
    if (!source.startsWith(userFolderPath) || !destination.startsWith(userFolderPath)) {
        throw new Error('Unauthorized directory access attempt');
    }

    return new Promise((resolve, reject) => {
        ncp(source, destination, (err) => {
            if (err) {
                reject(err);
            } else {
                resolve();
            }
        });
    });
};

module.exports = router;