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;
let configFile = fs.readFileSync(path.join(__dirname, '../../../data', 'setup.json'), 'utf-8')
let config = JSON.parse(configFile)[0];
const bodyParser = require('body-parser');
const crypto = require('crypto');
const os = require('os');
const { getUserData, getSetupData } = require('../../../Middlewares/watcherMiddleware');

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

router.get('/', authMiddleware, async (req, res) => {
    const folderName = req.params.folderName || '';  
    
    if (!req.userData || !req.userData.name) {
        return res.render('error-recovery-file', { error: 'User data is undefined or incomplete' });
    }

    const userId = req.userData.id; 
    const userName = req.userData.name;
    const downloadDir = path.join('cdn-files', userName);
    const domain = config.domain || 'swiftlogic-labs.com';

    if (!config.domain) {
        console.error('Domain is not defined in setup.json');
        config.domain = 'swiftlogic-labs.com';
    }

    if (!fs.existsSync(downloadDir)) {
        fs.mkdirSync(downloadDir, { recursive: true });
    }

    try {
        fs.accessSync(downloadDir, fs.constants.R_OK | fs.constants.W_OK);
    } catch (err) {
        console.error('No access!', err);
        return res.render('error-recovery-file', { error: 'No access to directory' });
    }

    let fileInfoNames = [];
    try {
        const fileInfo = JSON.parse(fs.readFileSync(path.join(__dirname, '../../../data', 'setup.json'), 'utf-8'))
        
        if (!Array.isArray(fileInfo)) {
            console.error('fileInfo is not an array. Check the contents of file_info.json');
        } else {
            fileInfoNames = fileInfo.map(file => file.fileName);
        }
    } catch (err) {
        console.error('Error reading file_info.json:', err);
    }

    try {
        const files = await fs.promises.readdir(downloadDir);

        const folders = files.filter(file => fs.statSync(path.join(downloadDir, file)).isDirectory());

        const fileDetails = files.map(file => {
            const filePath = path.join(downloadDir, file);
            const stats = fs.statSync(filePath);
            const fileExtension = path.extname(file).toLowerCase();
            const encodedFileName = encodeURIComponent(file);
            const fileLink = `https://${domain}/attachments/${userId}/${encodedFileName}`;

            const fileType = stats.isDirectory() ? 'folder' : 'file';

            return {
                name: file,
                size: stats.size,
                url: fileLink,
                extension: fileExtension,
                type: fileType
            };
        });

        function formatFileSize(fileSizeInBytes) {
            if (fileSizeInBytes < 1024 * 1024) {
                return `${(fileSizeInBytes / 1024).toFixed(2)} Ko`;
            } else if (fileSizeInBytes < 1024 * 1024 * 1024) {
                return `${(fileSizeInBytes / (1024 * 1024)).toFixed(2)} Mo`;
            } else {
                return `${(fileSizeInBytes / (1024 * 1024 * 1024)).toFixed(2)} Go`;
            }
        }


        const availableExtensions = Array.from(new Set(fileDetails.map(file => file.extension)));

        res.render('dashboard', { files: fileDetails, folders, extensions: availableExtensions, allFolders: folders, folderName: folderName, fileInfoNames: fileInfoNames, userData: userData });
    } catch (err) {
        console.error('Error reading directory:', err);
        return res.render('error-recovery-file', { error: err.message });
    }
});

module.exports = router;