var vowels = "(A(O)?)|(E)|(H)|(I)|(M)|(O)|(TR)|(U)|(a((a)|(e)|(i)|(u))?)|(e(e)?)|(i)|(o((a)|(o))?)|(tR)|(u)"
var consonants = "(B(h)?)|(Ch)|(D(h)?)|(G)|(J(h)?)|(K(h)?)|(L)|(N)|(R)|(Sh)|(T(h)?)|(b(h)?)|(ch)|(d(h)?)|(g(h)?)|(h)|(j(h)?)|(k(h)?)|(l)|(m)|(n(Y)?)|(p(h)?)|(r)|(s(h)?)|(t(h)?)|(v)|(y)"
var letter_codes = {
"~a" : "అ",
"~aa" : "ఆ",
"~A" : "ఆ",
"~i" : "ఇ",
"~ee" : "ఈ",
"~I" : "ఈ",
"~u" : "ఉ",
"~oo" : "ఊ",
"~U" : "ఊ",
"~e" : "ఎ",
"~ae" : "ఏ",
"~E" : "ఏ",
"~ai" : "ఐ",
"~o" : "ఒ",
"~oa" : "ఓ",
"~O" : "ఓ",
"~au" : "ఔ",
"~tR" : "ఋ",
"~TR" : "ౠ",
"a" : "",
"aa" : "ా",
"A" : "ా",
"i" : "ి",
"ee" : "ీ",
"I" : "ీ",
"u" : "ు",
"oo" : "ూ",
"U" : "ూ",
"e" : "ె",
"ae" : "ే",
"E" : "ే",
"ai" : "ై",
"o" : "ొ",
"oa" : "ో",
"O" : "ో",
"au" : "ౌ",
"tR" : "ృ",
"TR" : "ౄ",
"k" : "క",
"K" : "క",
"kh" : "ఖ",
"Kh" : "ఖ",
"g" : "గ",
"gh" : "ఘ",
"G" : "ఙ",
"ch" : "చ",
"Ch" : "ఛ",
"j" : "జ",
"jh" : "ఝ",
"J" : "ఝ",
"Jh" : "ఝ",
"nY" : "ఞ",
"t" : "ట",
"T" : "ఠ",
"d" : "డ",
"D" : "ఢ",
"N" : "ణ",
"th" : "త",
"Th" : "థ",
"dh" : "ద",
"Dh" : "ధ",
"n" : "న",
"p" : "ప",
"ph" : "ఫ",
"b" : "బ",
"B" : "భ",
"bh" : "భ",
"Bh" : "భ",
"m" : "మ",
"y" : "య",
"r" : "ర",
"R" : "ఱ",
"l" : "ల",
"L" : "ళ",
"v" : "వ",
"sh" : "శ",
"Sh" : "ష",
"s" : "స",
"h" : "హ",
"AO" : "ఁ",
"M" : "ం",
"H" : "ః",
"~AO" : "ఁ",
"~M" : "ం",
"~H" : "ః",
"*" : "్"
}


function split_word(word)
{
	var syllables = new Array(0);
	var vowel_start_p = true;
	while (word.length) {
		re = new RegExp(vowels);
		var index = word.search(vowels);
		if (index == 0) {  //the vowel's at the start of word
			var matched = re.exec(word)[0]; //what is it?
			if (vowel_start_p) {
				syllables.push(("~"+matched)); //one more to the syllables
			} else {
				syllables.push(matched);
			}
			vowel_start_p = true;
			word = word.substring(matched.length);
		} else {
			re = new RegExp(consonants);
			var index = word.search(consonants);
			if (index == 0) {
				var matched = re.exec(word)[0];
				syllables.push(matched);
				vowel_start_p = false;
				word = word.substring(matched.length);

				//look ahead for virama setting
				var next = word.search(vowels);
				if (next != 0 || word.length == 0)
				syllables.push('*');
			} else {
				syllables.push(word.charAt(0));
				word = word.substring(1);
			}
		}
	}
	return syllables;
}

function match_code(syllable_mcc)
{
	var matched = letter_codes[syllable_mcc];

	if (matched != null) return matched;
	return syllable_mcc;
}

function one_word(word_ow)
{
	if (!word_ow) return "";
	var syllables_ow = split_word(word_ow);
	var letters_ow = new Array(0);

	for (var i_ow = 0; i_ow < syllables_ow.length; i_ow++) {
		letters_ow.push(match_code(syllables_ow[i_ow]));
	}
	return letters_ow.join("");
}

function many_words(sentence)
{
	var regex = "((" + vowels + ")|(" + consonants + "))+";
	var words = new Array(0);
	while (sentence.length >= 1) {
		re = new RegExp("^``" + regex);
		var match = re.exec(sentence);
		if (match != null) {
			match = match[0];
			words.push("`");
			words.push(one_word(match.substring(2)));
			sentence = sentence.substring(match.length);
		} else {
			re = new RegExp("^`" + regex);
			match = re.exec(sentence);
			if (match != null) {
				match = match[0];
				words.push(match.substring(1));
				sentence = sentence.substring(match.length);
			} else {
				re = new RegExp("^" + regex);
				match = re.exec(sentence);
				if (match != null) {
					match = match[0];
					words.push(one_word(match));
					sentence = sentence.substring(match.length);
				} else {
					words.push(sentence.charAt(0));
					sentence = sentence.substring(1);
				}
			}
		}
	}
	return words.join("");
}

function print_many_words(index_pmw)
{
//	alert('hello');
	var text_pmw = many_words(document.getElementById('many_words_text').value);

	var ans = "";
	while (text_pmw.length) {
		var unicode_chars = /&#[0-9]+;/;
		re = unicode_chars;
		var matche = re.exec(text_pmw);
		if (matche != null) {
			matche = matche[0];
			search = text_pmw.search(unicode_chars);
			ans += text_pmw.substring(0, search);
			ans += String.fromCharCode(matche.match(/[0-9]+/));
			text_pmw = text_pmw.substring(search + matche.length);
		} else {
			ans += text_pmw.substring(0);
			text_pmw = "";
		}
	}

	document.getElementById('result').value = ans;

//	var html_txt = "";
//	for (i=0; i<ans.length; i++) {
//		var unicode_character = ans.charCodeAt(i);
//		switch (unicode_character) {
//			case 32:
//				html_txt += " ";
//				break;
//			case 10:
//			case 13:
//				html_txt += "<br/>\n";
//				break;
//			default:
//				html_txt += "&#" + unicode_character + ";";
//		}
//	}
//
//	document.convarea.html_text.value = html_txt;
}