const express = require('express');
const fs = require('fs');
const db = require('../db/connection');
const { setuid } = require('process');
const router = express.Router();


router.use('/', (req, res) => {
    const result = req.headers['x-username'];

    console.log(req.headers['x-username']);
    if (!result) {
        return res.status(400).json({ error: "x-username header is required" });
    }
    const pre_username = JSON.parse(result);
    const username = pre_username.token;
    // Check if user exists and has permissions
    console.log(username);
    const query = 'SELECT perms FROM users WHERE username = ?';
    db.query(query, [username], (err, results) => {
        if (err) {
            console.error('Database error:', err);
            return res.status(500).json({ error: "Internal server error" });
        }

        if (results.length === 0) {
            return res.status(401).json({ error: "Unauthorized" });
        }

        const perms = results[0].perms;
        if (perms !== 'admin') {
            return res.status(403).json({ error: "Insufficient permissions" });
        }

        // Handle config updates
        if (req.method === 'POST') {
            try {
                const newConfig = req.body;
                console.log(newConfig);
                const existingConfig = JSON.parse(fs.readFileSync('config.json', 'utf8'));
                const updatedConfig = { ...existingConfig, ...newConfig };
                fs.writeFileSync('config.json', JSON.stringify(updatedConfig, null, 2));
                res.json({ message: "Config updated successfully" });
            } catch (error) {
                console.error('Error writing config:', error);
                res.status(500).json({ error: "Failed to update config" });
            }
        }
        
        // Handle config reads
        else if (req.method === 'GET') {
            try {
                const configData = fs.readFileSync('config.json', 'utf8');
                if (!configData) {
                    return res.status(500).json({ error: "Config file is empty" });
                }
                const config = JSON.parse(configData);
                res.json(config);
            } catch (error) {
                console.error('Error reading config:', error);
                res.status(500).json({ error: "Failed to read config" });
            }
        }
        
        else {
            res.status(405).json({ error: "Method not allowed" });
        }
    });
});

module.exports = router;