#!/usr/bin/env node

var
	app,
	modulesPath = process.env.WAPPALYZER_NODE_PATH !== undefined ? process.env.WAPPALYZER_NODE_PATH + '/node_modules/' : '',
	json        = require(process.env.WAPPALYZER_ROOT + '/src/apps.json');

for ( app in json.apps ) {
	['headers', 'html', 'env', 'meta', 'script'].forEach(function(type) {
		var
			key,
			patterns = json.apps[app][type];

		if ( patterns !== undefined ) {
			patterns = typeof patterns === 'string' ? [patterns] : patterns;

			if ( !( patterns instanceof Array ) ) {
				patterns = [];

				for ( key in json.apps[app][type] ) {
					patterns.push(json.apps[app][type][key]);
				}
			}

			patterns.forEach(function(pattern) {
				var
					attrs = pattern.split('\\;'),
					regex = '/' + attrs.shift().replace('/', '\/') + '/';

				//Check if the pattern is a valid RegExp
				//Note: unlike when used in Wappalyzer, the modifier i isn't added here
				new RegExp(regex);


				if ( /^\/(?:\^\$|\.\+|\.\*)\/$/.test(regex) )  {
					throw new Error('Pattern should be replaced with empty string.\n' + app + ': ' + type + ': ' + pattern);
				}

				if ( type === 'html' ) {
					if ( /\.(?:\+|\*)/.test(regex) )  {
						throw new Error('Avoid ".+" and ".*" in HTML patterns. Consider using "[^>]+" or "[^<]+" instead.\n' + app + ': ' + type + ': ' + pattern);
					}

					if ( !/[<>]/.test(regex) )  {
						throw new Error('HTML patterns must contain "<" or ">".\n' + app + ': ' + type + ': ' + pattern);
					}
				}
			});
		}
	});

	if ( /[a-z]+:\/\//i.test(json.apps[app].website) ) {
		throw new Error('Do not include the protocol in the website URL\n' + app + ': ' + json.apps[app].website);
	}
}