/**
 * Created by cmiles on 8/9/2017.
 */

var express = require('express');
var router  = express.Router();


var authorize = require('../core/authorize.js');

router.post('/', authorize.auth, function(req, res, next) {
	var request = req.body;

	var fs = require('fs');
	
	fs.writeFileSync("./syntax_verify_config", request.dhcp_config_data, 'utf8');

	var exec = require('child_process').exec;

	exec('/usr/sbin/dhcpd -t -cf ./syntax_verify_config > verify_output 2> verify_output', function(err, stdout, stderr)
	{
		var output = fs.readFileSync('./verify_output', "utf8");

		if (err) {
			output = output.replace("\n", "<br>");
			output = output.replace(". ", "<br>");
			output = output.replace("line", "<br><br>line");
			output = output.replace("Configuration file errors encountered", "<br><br>Configuration file errors encountered");

			res.send('<script type="text/javascript">modal (\'DHCP Config Syntax Validation\', ' + JSON.stringify('<span style="color:red">' + output + '</span>') + ', "");');

			return;
		}
		else {

			output = output.replace("\n", "<br>");
			res.send(
				'<script type="text/javascript">modal (\'DHCP Config Save\', ' + JSON.stringify('Syntax OK <br><br> Config Snapshot created') + ', "");'
			);
			/* Read Config */
			var json_file = require('jsonfile');
			var glass_config = json_file.readFileSync('config/glass_config.json');

			/* Make Dir if not exist */
			var dir = './config_backups';
			if (!fs.existsSync(dir)){
				fs.mkdirSync(dir);
			}

			//date +"%Y-%m-%d_%H:%M:%S"
			exec('/bin/cp ' + glass_config.config_file + ' ./config_backups/`basename ' + glass_config.config_file + '`_`date +"%Y-%m-%d_%H:%M:%S"`',
				function(err, stdout, stderr) {

			});

			fs.writeFileSync(glass_config.config_file, request.dhcp_config_data, 'utf8');

			fs.unlinkSync("./verify_output");
			fs.unlinkSync("./syntax_verify_config");
		}
	});
});

module.exports = router;