String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,'');
}

var ua_form = null;
var div_idle_outer = null;
var div_idle_inner = null;
var div_loader_anim = null;
var div_art_stats = null;
var default_min_keyword_len = 3;
var default_max_keywords = 500;
var default_max_replacements = 0;
var t = null;
var tint = null;
var ua_htmlres = null;

window.addEvent('domready', function() {
	ua_form = document.getElementById('UniqueArticleForm');
	div_idle_outer = document.getElementById('stay_idle_outer');
	div_idle_inner = document.getElementById('stay_idle_inner');
	div_loader_anim = document.getElementById('ua_loader_anim');
	div_art_stats = document.getElementById('art_stats');
	ua_htmlres = document.getElementById('ua_htmlres');
	ua_check_article_length();
	$('ua_process').addEvent('click', function(e) {
		e.stop();
		check_ua_parameters();
		ua_check_article_length();
		if (0 == ua_form.ua_article.value.trim().length) {
			alert(COM_UA_ERR_EMPTY_ARTICLE);
			ua_form.ua_article.value = '';
			ua_form.ua_article.focus();
			return;
		}
		div_loader_anim.style.display = 'block';
		var x = new Request({
			url: 'index.php?option=com_uniquearticle&view=default&task=getSynonyms&format=raw', 
			method: 'post',
			encoding: 'utf-8',
			timeout: 30000,
			noCache: true,
			onSuccess: function(responseText) {
				div_loader_anim.style.display = 'none';
				if ('!!' == responseText.substr(0,2)) {
					var msg = responseText.substr(2);
					'!' == msg.charAt(0) ? window.location = window.location.href : alert(msg);
				} else {
					txts = responseText.split('@@@');
					ua_form.ua_result.value = txts[0];
					ua_htmlres.innerHTML = txts[1];
				}
				t = 190;
				if (t) {
					ua_stayIdle();
					tint = self.setInterval('ua_stayIdle()', 1000);
				}
			}
		}).send('article='+ua_form.ua_article.value.trim() + '&mode=' + ua_form.mode.options[ua_form.mode.selectedIndex].value + '&lang='+ua_form.lang.options[ua_form.lang.selectedIndex].value + '&mkl='+ua_form.min_keyword_len.value + '&mk='+ua_form.max_keywords.value + '&mr='+ua_form.max_replacements.value);
	});
	$('ua_article').addEvent('focus', function(e) {
		if (COM_UA_PUT_ARTICLE_TEXT_HERE == this.value)
			this.value = '';
	}).addEvent('blur', function(e) {
		if (0 == this.value.length)
			this.value = COM_UA_PUT_ARTICLE_TEXT_HERE;
	});
})

function check_ua_parameters() {
	var testvalue = parseInt(ua_form.min_keyword_len.value);
	if (isNaN(testvalue) || testvalue < 1)
		ua_form.min_keyword_len.value = default_min_keyword_len;
	testvalue = parseInt(ua_form.max_keywords.value);
	if (isNaN(testvalue) || testvalue > default_max_keywords || testvalue < 1)
		ua_form.max_keywords.value = default_max_keywords;
	testvalue = parseInt(ua_form.max_replacements.value);
	if (isNaN(testvalue) || testvalue > default_max_replacements)
		ua_form.max_replacements.value = default_max_replacements;
}

function ua_clear() {
	ua_form.ua_article.value = '';
	ua_form.ua_result.value = '';
	ua_htmlres.innerHTML = '';
	ua_form.ua_article.focus();
	return false;
}

function ua_copy_to_source() {
	ua_form.ua_article.value = ua_form.ua_result.value.trim();
	return false;
}

function ua_stayIdle() {
	if (!t) {
		div_idle_outer.style.display = 'none';
		div_idle_inner.innerHTML = '';
		ua_form.ua_process.disabled = false;
		window.clearInterval(tint);
		return;
	}
	var secs = t;
	var time = '';
	if (secs >= 3600) {
		var hours = parseInt(secs/3600);
		secs = secs % 3600;
		time = time + (hours < 10 ? '0' : '') + hours.toString() + ':';
	}
	var minutes = parseInt(secs/60);
	secs = secs % 60;
	time = time + (minutes < 10 ? '0' : '') + minutes.toString() + ':';
	time = time + (secs < 10 ? '0' : '') + secs.toString();
	ua_form.ua_process.disabled = true;
	div_idle_inner.innerHTML = time;
	div_idle_outer.style.display = 'block';
	t = t-1;
}

function ua_check_article_length() {
	ua_form.ua_article.value = ua_form.ua_article.value.trim();
	if (10000 < ua_form.ua_article.value.length) {
		ua_form.ua_article.value = ua_form.ua_article.value.substr(0, 10000);
		alert(COM_UA_ARTICLE_TOO_LONG);
	}
	var words = ua_form.ua_article.value.split(/[ \n\t\v\r\f\.,?!'":;\\\/&()-\[\]\{\}<>=]/);
	for (var i = words.length-1; i >= 0; i--)
		if (0 == words[i].length)
			words.splice(i,1);
	div_art_stats.innerHTML = COM_UA_ARTICLE_LENGTH+' '+ua_form.ua_article.value.length+' '+COM_UA_ARTICLE_LENGTH_SYMBOLS+' ('+words.length+' '+COM_UA_ARTICLE_LENGTH_WORDS+'.)';
}