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());

/**
 * @swagger
 * /dashboard/deletefile?token={token}:
 *   post:
 *     security:
 *       - bearerAuth: []
 *     tags:
 *       - File
 *     summary: Delete a specific file for a user
 *     description: This route allows you to delete a specific file for a user. It requires a valid JWT token in the Authorization header.
 *     requestBody:
 *       required: true
 *       content:
 *         application/json:
 *           schema:
 *             type: object
 *             properties:
 *               filename:
 *                 type: string
 *                 description: The name of the file to delete
 *     parameters:
 *       - in: header
 *         name: Authorization
 *         required: true
 *         schema:
 *           type: string
 *         description: The JWT token of your account to have access
 *     responses:
 *       200:
 *         description: Success
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 status:
 *                   type: string
 *                 message:
 *                   type: string
 *       400:
 *         description: Bad Request
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 error:
 *                   type: string
 *       401:
 *         description: Unauthorized
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 message:
 *                   type: string
 *       404:
 *         description: The specified file does not exist
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 status:
 *                   type: string
 *                 message:
 *                   type: string
 *       500:
 *         description: Internal server error
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 error:
 *                   type: string
 */


function authenticateToken(req, res, next) {
    if (req.session.user) {
        req.user = req.session.user;
        req.userData = req.session.user;
        return 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) {
        return res.status(401).json({ message: 'Unauthorized: No token provided' });
    }

    fs.readFile(path.join(__dirname, '../../../data', 'user.json'), 'utf8', (err, data) => {
        if (err) {
            console.error('Error reading user.json:', err);
            return res.status(500).json({ message: 'Internal server error' });
        }

        const users = JSON.parse(data);
        const user = users.find(u => u.token === token);

        if (!user) {
            return res.status(401).json({ message: 'Unauthorized: Invalid token' });
        }

        // Enregistrer l'utilisateur dans la session
        req.session.user = user;
        req.user = user;
        req.userData = user;
        next();
    });
}


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) => {
    if (!req.userData) {
        return res.status(401).json({ message: 'Authentication failed.' });
    }

    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) {
                    console.error('Error deleting file:', 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) => {
    if (!source.startsWith('cdn-files') || !destination.startsWith('cdn-files')) {
        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;