/**
 * Friendika people autocomplete
 *
 * require jQuery, jquery.textareas
 */
 
		
		
function ACPopup(elm,backend_url){
	this.idsel=-1;
	this.element = elm;
	this.searchText="";
	this.ready=true;
	this.kp_timer = false;
	this.url = backend_url;
	
	style = $(elm).offset();
	w = $(elm).width();
	h = $(elm).height();
	style.top=style.top+h;
	style.width = w;
	style.position = 'absolute';
/*	style['max-height'] = '150px';
	style.border = '1px solid red';
	style.background = '#cccccc';
	
	style.overflow = 'auto';
	style['z-index'] = '100000';
*/
	style.display = 'none';
	
	this.cont = $("<div class='acpopup'></div>");
	this.cont.css(style);
	
	$("body").append(this.cont);
}
ACPopup.prototype.close = function(){
	$(this.cont).remove();
	this.ready=false;
}
ACPopup.prototype.search = function(text){
	var that = this;
	this.searchText=text;
	if (this.kp_timer) clearTimeout(this.kp_timer);
	this.kp_timer = setTimeout( function(){that._search();}, 500);
}
ACPopup.prototype._search = function(){	
	console.log("_search");
	var that = this;
	var postdata = {
		start:0,
		count:100,
		search:this.searchText,
		type:'c',
	}
	
	$.ajax({
		type:'POST',
		url: this.url,
		data: postdata,
		dataType: 'json',
		success:function(data){
			that.cont.html("");
			if (data.tot>0){
				that.cont.show();
				$(data.items).each(function(){
					html = "<img src='{0}' height='16px' width='16px'>{1} ({2})".format(this.photo, this.name, this.nick)
					that.add(html, this.nick + ' - ' + this.link);
				});			
			} else {
				that.cont.hide();
			}
		}
	});
	
}
ACPopup.prototype.add = function(label, value){
	var that=this;
	var elm = $("<div class='acpopupitem' title='"+value+"'>"+label+"</div>");
	elm.click(function(e){
			t = $(this).attr('title').replace(new RegExp(' \- .*'),'');
		el=$(that.element);
		sel = el.getSelection();
		sel.start = sel.start- that.searchText.length;
		el.setSelection(sel.start,sel.end).replaceSelectedText(t).collapseSelection(false);
		that.close();
	});
	$(this.cont).append(elm);
}
ACPopup.prototype.onkey = function(event){
	if (event.keyCode == '13' && this.idsel>-1) {
		this.cont.children()[this.idsel].click();
		event.preventDefault();
	}
	if (event.keyCode == '38') { //cursor up
		cmax = this.cont.children().size()-1;
		this.idsel--;
		if (this.idsel<0) this.idsel=cmax;
		event.preventDefault();
	}
	if (event.keyCode == '40') { //cursor down
		cmax = this.cont.children().size()-1;
		this.idsel++;
		if (this.idsel>cmax) this.idsel=0;
		event.preventDefault();
	}
	
	if (event.keyCode == '38' || event.keyCode == '40' ) {
		this.cont.children().removeClass('selected');
		$(this.cont.children()[this.idsel]).addClass('selected');
	}
	
	if (event.keyCode == '27') { //ESC
		this.close();
	}
}

function ContactAutocomplete(element,backend_url){
	this.pattern=/@([^ \n]+)$/;
	this.popup=null;
	var that = this;
	
	$(element).unbind('keydown');
	$(element).unbind('keyup');
	
	$(element).keydown(function(event){
		if (that.popup!==null) that.popup.onkey(event);
	});
	
	$(element).keyup(function(event){
		cpos = $(this).getSelection();
		if (cpos.start==cpos.end){
			match = $(this).val().substring(0,cpos.start).match(that.pattern);
			if (match!==null){
				if (that.popup===null){
					that.popup = new ACPopup(this, backend_url);
				}
				if (that.popup.ready && match[1]!==that.popup.searchText) that.popup.search(match[1]);
				if (!that.popup.ready) that.popup=null;
				
			} else {
				if (that.popup!==null) {that.popup.close(); that.popup=null;}
			}
			
			
		}
	});		
	
}


/**
 * jQuery plugin 'contact_autocomplete'
 */
(function( $ ){
  $.fn.contact_autocomplete = function(backend_url) {
    this.each(function(){
		new ContactAutocomplete(this, backend_url);
	});
  };
})( jQuery );