fs = require('fs');

//var dict = '/usr/share/dict/american-english';
var dict = '/usr/share/dict/italian';
//var dict = '/usr/share/dict/ngerman';

fs.readFile(dict, 'utf8', function(err, data) {
	if (err) {
		return console.log(err);
	}

	var lines = data.split('\n');
	console.log(lines.length + ' words in dictionary');
	
	var word = '';
	var words = [];
	for(var i=0; i<lines.length; i++) {
		word = lines[i];
		if (word.length > 6 && word.length < 10) {
			//console.log('using ' + word);
			words.push(word);
		};
	}
	console.log('using ' + words.length + ' words out of the dictionary');


	
	var wildcardWord = function(word) {
		var words = [];
		for(var i=1; i<word.length; i++) {
			words.push(word.substr(0, i) + '.' + word.substr(i + 1));
		}
		return words;
	};
	
	var matchingWordlist = [];
	for(var w=0; w<words.length; w++) {
		var word = words[w];
		var wildcardedWords = wildcardWord(word);
		var matches = [];
		
		for(var i=0; i<wildcardedWords.length; i++) {
			wildcardedWord = wildcardedWords[i];
			for(var j=0; j<words.length; j++) {
				//console.log('match ' + words[j] + ' with ' + wildcardedWord);

				if(word.length == words[j].length && words[j].match(wildcardedWord) && word != words[j]) {
					matches.push(words[j]);
					//console.log(word + ' -> ' + words[j]);
				}
			}
		}
		
		//add to dictionary?
		if(matches.length >= 4) {
			console.log('using ' + word);
			var mw = {};
			mw[word] = matches;
			matchingWordlist.push(mw);
		}
		
		if(w % 5000 == 0) {
			console.log('intermediary results...');
			console.log(matchingWordlist);
		}
	}
	

	console.log('final result');
	console.log(JSON.stringify(matchingWordlist));
	process.exit(0);
});