'use strict';

var nconf = require('nconf');
var winston = require('winston');
var validator = require('validator');

var meta = require('../meta');
var plugins = require('../plugins');

exports.handle404 = function (req, res) {
	var relativePath = nconf.get('relative_path');
	var isClientScript = new RegExp('^' + relativePath + '\\/assets\\/src\\/.+\\.js');

	if (plugins.hasListeners('action:meta.override404')) {
		return plugins.fireHook('action:meta.override404', {
			req: req,
			res: res,
			error: {},
		});
	}

	if (isClientScript.test(req.url)) {
		res.type('text/javascript').status(200).send('');
	} else if (req.path.startsWith(relativePath + '/assets/uploads') || (req.get('accept') && req.get('accept').indexOf('text/html') === -1) || req.path === '/favicon.ico') {
		meta.errors.log404(req.path || '');
		res.sendStatus(404);
	} else if (req.accepts('html')) {
		if (process.env.NODE_ENV === 'development') {
			winston.warn('Route requested but not found: ' + req.url);
		}

		meta.errors.log404(req.path.replace(/^\/api/, '') || '');
		res.status(404);

		var path = String(req.path || '');

		if (res.locals.isAPI) {
			return res.json({ path: validator.escape(path.replace(/^\/api/, '')), title: '[[global:404.title]]' });
		}
		var middleware = require('../middleware');
		middleware.buildHeader(req, res, function () {
			res.render('404', { path: validator.escape(path), title: '[[global:404.title]]' });
		});
	} else {
		res.status(404).type('txt').send('Not found');
	}
};