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 bodyParser = require('body-parser');
const crypto = require('crypto');
const os = require('os');
const osUtils = require('os-utils');
const Convert = require('ansi-to-html');
const convert = new Convert();
const { getUserData, getSetupData } = require('../../../Middlewares/watcherMiddleware');

router.use(bodyParser.json());

function clean(obj) {
    for (var propName in obj) {
        if (obj[propName] === null || obj[propName] === undefined || obj[propName] === '') {
            delete obj[propName];
        } else if (typeof obj[propName] === 'object') {
            clean(obj[propName]);
            if (Object.keys(obj[propName]).length === 0) {
                delete obj[propName];
            }
        }
    }
}

function validateIP(ip) {
    if (!ip) return false;
    
    if (ip.includes('/')) {
        const [addr, bits] = ip.split('/');
        const bitsNum = parseInt(bits);
        
        if (isIPv4(addr)) {
            return bitsNum >= 0 && bitsNum <= 32;
        } else if (isIPv6(addr)) {
            return bitsNum >= 0 && bitsNum <= 128;
        }
        return false;
    }
    
    return isIPv4(ip) || isIPv6(ip);
}

function isIPv4(ip) {
    const ipv4Regex = /^(\d{1,3}\.){3}\d{1,3}$/;
    if (!ipv4Regex.test(ip)) return false;
    
    const parts = ip.split('.');
    return parts.every(part => {
        const num = parseInt(part);
        return num >= 0 && num <= 255;
    });
}

function isIPv6(ip) {
    const ipv6Regex = /^(?:(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}|(?:[0-9a-fA-F]{1,4}:){1,7}:|(?:[0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|(?:[0-9a-fA-F]{1,4}:){1,5}(?::[0-9a-fA-F]{1,4}){1,2}|(?:[0-9a-fA-F]{1,4}:){1,4}(?::[0-9a-fA-F]{1,4}){1,3}|(?:[0-9a-fA-F]{1,4}:){1,3}(?::[0-9a-fA-F]{1,4}){1,4}|(?:[0-9a-fA-F]{1,4}:){1,2}(?::[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:(?:(?::[0-9a-fA-F]{1,4}){1,6})|:(?:(?::[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(?::[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(?:ffff(?::0{1,4}){0,1}:){0,1}(?:(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9])|(?:[0-9a-fA-F]{1,4}:){1,4}:(?:(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9]))$/;
    return ipv6Regex.test(ip);
}

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) => {
    try {
        let setup = JSON.parse(fs.readFileSync(path.join(__dirname, '../../../data', 'setup.json'), 'utf-8'));
        
        if (req.body.allowedIps) {
            const ipsArray = Array.isArray(req.body.allowedIps) ? req.body.allowedIps : [req.body.allowedIps];
            
            req.body.allowedIps = ipsArray
                .filter(ip => ip && ip.trim())
                .filter(ip => validateIP(ip.trim()))
                .map(ip => ip.trim());
            
            console.log('IPs validées:', req.body.allowedIps);
        }

        clean(req.body);
        setup[0] = {
            ...setup[0],
            ...req.body
        };

        fs.writeFileSync(
            path.join(__dirname, '../../../data', 'setup.json'),
            JSON.stringify(setup, null, 2),
            'utf-8'
        );

        res.redirect('/dpanel/dashboard/admin/settingsetup');
    } catch (err) {
        console.error('Erreur lors de la mise à jour de la configuration:', err);
        res.status(500).send('Server Error');
    }
});

module.exports = router;