/**
    Mathics: a general-purpose computer algebra system
    Copyright (C) 2011 Jan Pöschko

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
**/

var docLoaded = false;
var lastSearchValue = '';

function showPage(response) {
	if ($('doc')) {
		//alert("update dom");
		//var content = response.content.gsub('&larr;', '<-').gsub('&rarr;', '->');
		//alert(content);
		$('doc').updateDOM(response.content);
	}
	//alert("page shown");
	$$('ul.test').each(function(test) {
		var id = test.id.substr(5); // 'test_...'
		var data = response.data[id];
		setResult(test, data.results);
	});
}

function loadDoc(page) {
	new Ajax.Request('/ajax/doc' + page, {
		method: 'get',
		onSuccess: function(transport) {
			docLoaded = true;
			var response = transport.responseText.evalJSON();
			showPage(response);
			$$('#doc *')[0].scrollIntoView();			
		}
	});
}

function showDoc() {
	$('document').addClassName('doc');
	$('code').addClassName('doc');
	$('doc').show();
	$('doclink').addClassName('active');
	if (!docLoaded)
		loadDoc('/');
}

function hideDoc() {
	$('doc').hide();	
	$('document').removeClassName('doc');
	$('code').removeClassName('doc');
	$('doclink').removeClassName('active');
}

function toggleDoc() {
	if ($('doc').visible())
		hideDoc();
	else
		showDoc();
}

function searchChange(event) {
	var query = $('search').value.strip();
	if (!$('search').hasClassName('empty')) {
		if (query) {
			new Ajax.Request('/ajax/doc/search/', {
				method: 'get',
				parameters: {
					query: query
				},
				onSuccess: function(transport) {
					docLoaded = true;
					var response = transport.responseText.evalJSON();
					showPage(response);
					showDoc();
				}
			});
		} else if (lastSearchValue != ''){
			hideDoc();
			loadDoc('/');
		}
		lastSearchValue = query;
	} else
		lastSearchValue = '';
}

function searchFocus() {
	if ($('search').hasClassName('empty')) {
		$('search').value = '';
		$('search').removeClassName('empty');
	}			
}

function searchBlur() {
	if (!$('search').value) {
		$('search').addClassName('empty');
		$('search').value = "Search";
	}
}

function searchKeyUp(event) {
	if (event.keyCode == Event.KEY_ESC) {
		event.stop();
		$('search').value = '';
		hideDoc();
		loadDoc('/');
		focusLast();
	}
}

function searchKeyDown(event) {
	if (isGlobalKey(event))
		event.stop();
}

function initDoc() {
	if (!$('search'))
		return;
	new Form.Element.Observer('search', 0.2, searchChange.bindAsEventListener($('search')));
	$('search').observe('focus', searchFocus);
	$('search').observe('blur', searchBlur);
	$('search').observe('keydown', searchKeyDown.bindAsEventListener($('search')));
	$('search').observe('keyup', searchKeyUp.bindAsEventListener($('search')));
	$('search').value = '';
	searchBlur();
}

$(document).observe('dom:loaded', initDoc);