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());

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('/', authMiddleware, async (req, res) => {
    const userId = req.userData.name; 
    const { currentName, newName } = req.body;

    if (!currentName || !newName) {
        return res.status(400).send('Both currentName and newName must be provided.');
    }

    const currentPath = path.join('cdn-files', userId || '', currentName);
    const newPath = path.join('cdn-files', userId, newName);

    try {
        await fs.promises.rename(currentPath, newPath);

        const data = await fs.promises.readFile(path.join(__dirname, '../../../data', 'file_info.json'), 'utf-8')
        let fileInfo = JSON.parse(data);

        let found = false;
        for (let i = 0; i < fileInfo.length; i++) {
            if (fileInfo[i].fileName === currentName) {
                fileInfo[i].fileName = newName;
                found = true;
                break;
            }
        }

        if (found) {
            await fs.promises.writeFile(path.join(__dirname, '../../../data', 'file_info.json'), JSON.stringify(fileInfo, null, 2), 'utf8');
        }

        res.status(200).send('L\'opération a été effectuée avec succès.');  
    } catch (err) {
        console.error(err);
        return res.status(500).send('Erreur lors du changement de nom du fichier.');
    }
});

router.post('/:filePath*', authMiddleware, async (req, res) => {
    const userId = req.userData.name;
    const { currentName, newName } = req.body;
    const filePath = path.join(req.params.filePath, req.params[0] || '');

    if (!currentName || !newName) {
        return res.status(400).send('Both currentName and newName must be provided.');
    }

    const userDir = path.join('cdn-files', userId);
    const currentPath = path.join(userDir, filePath, currentName);
    const newPath = path.join(userDir, filePath, newName);

    if (!currentPath.startsWith(userDir) || !newPath.startsWith(userDir)) {
        ErrorLogger.error('Unauthorized directory access attempt');
        return res.status(403).send('Unauthorized directory access attempt');
    }

    try {
        await fs.promises.rename(currentPath, newPath);

        const data = await fs.promises.readFile(path.join(__dirname, '../../../data', 'file_info.json'), 'utf8');
        let fileInfo = JSON.parse(data);

        let found = false;
        for (let i = 0; i < fileInfo.length; i++) {
            if (fileInfo[i].fileName === currentName) {
                fileInfo[i].fileName = newName;
                found = true;
                break;
            }
        }

        if (found) {
            await fs.promises.writeFile(path.join(__dirname, '../../../data', 'file_info.json'), JSON.stringify(fileInfo, null, 2), 'utf8');
        }

        res.status(200).send('L\'opération a été effectuée avec succès.');  
    } catch (err) {
        console.error(err);
        return res.status(500).send('Erreur lors du changement de nom du fichier.');
    }
});

module.exports = router;