function ask_window_hide(){
	clearInterval(topic_box_timer);
	if(message_box_timer!=0) clearInterval(message_box_timer);
	$('#shadow').hide();
	$('#window').hide();
	$('#ask-button').show();
	ask_window_hide_helper();
}

function ask_window_show(){
	toId=0;
	$('#ask-button').hide();
	$('#shadow').show();
	$('#window').show();
	$.getScript('/files/pub/peercall.js');
	scroll_down();
	renew_box();
	topic_box_timer=setInterval('renew_box()',15000);
	draw_timer=setInterval('check_draw()', 1000);
	ask_window_show_helper();
}

function add_new_question(text){
	if(typeof(text)=='undefined') text=$('#write-new-area').val();
	$.post(ask_new_message_url, {message: text, topic: add_new_topic, subject: ukurs},
        function(data){			
			renew_box(function(){
				open_ask(parseInt(data));
			});
	   }
	);
}

var audioOn=true;

var tplSet=false;
var fromId, toId;
var toTime=0;
var fromTime=0;
setInterval(function(){fromTime+=1;},60000);
function getPeerId(pid){
	fromId=pid;
	refreshPeers();
}

function getPeerTo(pid,time){
	toId=pid;
	if(!time) time=0;
	toTime=time;
	refreshPeers();
}

function refreshPeers(){
	if(fromId && toId && toTime!=0 && toTime>fromTime-5){
		$('#callBtn').show();
	} else $('#callBtn').hide();
}


function scroll_down(){
	var o=document.getElementById('chat-panel');
	o.scrollTop = o.scrollHeight;
}
var topic_box_timer;
var history_box=[];
var current_ask=0;
var ask_hash='';
function renew_box(f){
	var y=$('#scroller').get(0).scrollTop;
	$.post(ask_topic_url, {selected: current_ask}, function(data) {
			$('#topic-box').html(data);
			if(typeof(f)!='undefined') f();
	});
	$('#scroller').get(0).scrollTop=y;
}
function check_alert(newmsg){
	var need_alert=false;
	for(var key in newmsg){
		var s=newmsg[key];
		var find=false;
		for(var key2 in window.readmsg){
			if(window.readmsg[key2]==s){
				find=true;
				break;
			}
		}
		if(!find) need_alert=true;
		window.readmsg.push(s);
	}
	if(need_alert){
		var audio=document.getElementById('audio1');
		if(audioOn) audio.play();
	}
}

var xInterval=0;
var message_box_timer=0;
var last_loaded_msg=0;
function load_new_messages(ask_id){
	$.post(ask_messages_board_url, {type: 'partical', ask_id: ask_id, last_msg: last_loaded_msg, time: ask_date, fromId: fromId}, function(data) {
		if(data.indexOf('div')!==-1){
			$('#chat-message-box').append(data);
			//$('#chat-panel').get(0).scrollTop=1000000000;
			scroll_down();
		} else {
			$('#fake-div').html('');
			$('#fake-div').append(data);
		}
	});
}
function del_msg(ask_id, msg_id){
	$.post(ask_messages_board_url, {type: 'del_msg', ask_id: ask_id, amsg: msg_id}, function(data) {
		$('#msg'+msg_id).hide();
	});
}
var is_ask_open=1;
var ask_status=0;
var ask_date=0;
var context, canvas, empty_img;
var tmp_image = new Image();
tmp_image.onload = function () {
    context.drawImage(tmp_image, 0, 0);
};
function open_ask(id){
	set_testing_status(0);
	toId=0;
	toTime=0;
	refreshPeers();
	if(current_ask!=0) $('#question'+current_ask).removeClass('question-new');	
	if(message_box_timer!=0) clearInterval(message_box_timer);
	current_ask=id;
	ask_date=0;
	$('#new-message').hide();
	$('#welcome-message').hide();
	$('#chat-message-box').html('');
	$('#write-area').val('Введите здесь своё сообщение');
	$('#write-area').css('color','#AAAAAA');
	$.post(ask_messages_board_url, {type: 'total', ask_id: id}, function(data) {
		is_ask_open=1;
		$('#chat-message-box').html(data);		
		$('#question'+current_ask).addClass('question-new');
		if(!is_ask_open){
			$('#write-panel').hide();
			$('#accept-panel').show();
		} else {
			$('#write-panel').show();
			$('#accept-panel').hide();
			message_box_timer=setInterval('load_new_messages('+id+')', 5000);
			if(ask_status==2){
				$('#control-panel').show();
			} else {
				$('#control-panel').hide();
			}
		}
		check_draw();
		$('#desk').show();
		
		context.clearRect(0, 0, canvas.width, canvas.height);

		//tmp_image.crossOrigin = "anonymous";
		tmp_image.src=to_canvas+'?id'+Math.random();
		
		//context.drawImage(empty_img,0,0,canvas.width,canvas.height);
		//$('#chat-panel').get(0).scrollTop=1000000000;
		scroll_down();
	});	
}
function accept_question(){
	$.post(ask_messages_board_url, {type: 'accept', ask_id: current_ask, time: $('#answer-time').val()}, function(data) {
		if(data.indexOf('success')!==-1){
			message_box_timer=setInterval('load_new_messages('+current_ask+')', 10000);
			$('#accept-panel').hide(); $('#write-panel').show();
			load_new_messages(current_ask);
			ask_status=2;
			$('#control-panel').show();
		} else {
			alert('Ученика принял другой консультант.');
			$('#desk').hide();
			$('#welcome-message').show();
		}
	});
}
function add_new_message(){
	if(message_box_timer!=0) clearInterval(message_box_timer);	
	$.post(ask_new_message_url, {message: $('#write-area').val(), ask_id: current_ask},
        function(data){	
			load_new_messages(current_ask);
			message_box_timer=setInterval('load_new_messages('+current_ask+')', 10000);
	   }
	);
	$('#write-area').val('');
}
var drawing=false;
var drawing2=false;
var draw_data='';
var draw_timer=0;
var mouse_down=false;
var mx=0;
var my=0;
var to_image='';
var to_canvas='';
function draw_omd(e,touch){
	//if(!mouse_down){
	
	//if(!touch && typeof(e.changedTouches)!='undefined' && e.changedTouches.length>0) touch=true;
	if(!touch || e.changedTouches.length==1){
		history_box.push(context.getImageData(0, 0, canvas.width, canvas.height));
		if(history_box.length>20) history_box.splice(0,history_box.length-20);
	}
	if(touch){
		$('#cancel-btn').show();
	}
	mouse_down=true;
	var offset = $('#draw-desk-img').offset();
	var posY = offset.top/* - window.scrollTop*/;
	var posX = offset.left/* - window.scrollLeft*/;
	if(touch){
		var new_x=e.changedTouches[0].pageX-posX;
		var new_y=e.changedTouches[0].pageY-posY;
	} else {
		var new_x=e.pageX-posX;
		var new_y=e.pageY-posY;
	}
	mx=new_x;
	my=new_y;
	draw_omm(e,touch);
}
function draw_omu(e,touch){
	//if(touch && e.changedTouches.length>0) return false;
	mouse_down=false;
	mx=-10000;
	my=-10000;
}
function cancel_draw(){
	if(history_box.length>0){
		var hb=history_box[history_box.length-1];
		context.clearRect(0,0,canvas.width,canvas.height);
		context.putImageData(hb, 0, 0);
		//context.drawImage(hb, 0, 0, canvas.width,canvas.height);
		history_box.splice(-1,1);
		drawing=true;
		check_draw();
	}
}
var tplZoom=100;
var tplWidth=0;
var tplHeight=0;
window.onkeypress = function(e) {
	if (e.ctrlKey==true && (e.keyCode==122 || e.keyCode==1103) || e.keyCode==26){
		cancel_draw();
	}
	var changeZoom=false;
	if(e.keyCode==43){
		tplZoom+=10;
		changeZoom=true;
	}
	if(e.keyCode==45){
		if(tplZoom>50){
			tplZoom-=10;
			changeZoom=true;
		} else if(tplZoom>20){
			tplZoom-=5;
			changeZoom=true;
		} else if(tplZoom>0){
			tplZoom-=3;
			changeZoom=true;
		}
	}
	if(changeZoom){
		var td=$('#tplData').get(0);
		var newWidth=Math.floor(tplWidth/100*tplZoom);
		var newHeight=Math.floor(tplHeight/100*tplZoom);
		var oldX=parseInt(td.style.left);
		var oldY=parseInt(td.style.top);
		var oldWidth=parseInt(td.style.width);
		var oldHeight=parseInt(td.style.height);
		td.style.width=newWidth+'px';
		td.style.height=newHeight+'px';
		td.style.left=(oldX+Math.round((oldWidth-newWidth)/2))+'px';
		td.style.top=(oldY+Math.round((oldHeight-newHeight)/2))+'px';
	}
}
window.onkeyup = function(e) {
	if(e.keyCode==27){
		tplSet=0;
		$('#tplData').hide();
		$('#cancelTplSet').hide();
	}
}
//$('*').mouseup(function(){
//	mouse_down=false;
//});
var tmp_canvas = document.createElement('CANVAS');
var tmp_context=tmp_canvas.getContext('2d');
/*function toDataURL(img) {
    var dataURL;
    tmp_canvas.height = canvas.height;
    tmp_canvas.width = canvas.width;
    tmp_context.drawImage(this, 0, 0);
    dataURL = tmp_canvas.toDataURL("image/png");
    tmp_context.clearRect(0,0,tmp_canvas.width,tmp_canvas.height);
    return dataURL;
}*/

function check_draw(){
	if(current_ask){
		//отправка
		if(drawing){
			var data=canvas.toDataURL("image/png");//context.getImageData(0,0,canvas.width,canvas.height);
			if(data!=draw_data){
				draw_data=data;
				$.post("/files/ask/index.php", {ask: current_ask, hash: ask_hash, data: data, type: check_draw_type},function(){});
			}
			drawing=false;
		}
		check_draw_helper1();
		//получение
		if(!drawing2) $('#desk-img').attr('src',to_image+'?id='+Math.random());
		if(is_student){
			$.post("/files/ask/index.php", {ask: current_ask, hash: ask_hash, type: 3},function(r){
				if(r=='1'){
					var tmp = new Image();
					tmp.onload=function(){
						context.clearRect(0,0,canvas.width,canvas.height);
						context.drawImage(tmp, 0, 0, canvas.width,canvas.height);
					}
					tmp.src=to_image.replace('h','s')+'?id='+Math.random();
				}
			});
		}
	}
}
var erase=false;
var cutCircle = function(context, x, y, radius){
    context.beginPath();
    context.globalCompositeOperation = 'destination-out';
    context.arc(x, y, radius, 0, Math.PI*2, true);
    context.fill();
    context.globalCompositeOperation = 'source-over';
    context.closePath();
}
function tplMM(e,touch){
	var ex=e.pageX;
	var ey=e.pageY;
	if(touch){
		ex=e.changedTouches[0].pageX;
		ey=e.changedTouches[0].pageY;
	}
	var offset = $('#draw-desk-img').offset();
	var posY = offset.top-43;
	var posX = offset.left-231;
	var td=$('#tplData').get(0);
	td.style.left=(ex-posX-Math.round(td.width/2))+'px';
	td.style.top=(ey-posY-Math.round(td.height/2))+'px';
}
function tplC(e,touch){
	var ex=e.pageX;
	var ey=e.pageY;
	
	var isRightMB;
	if ("which" in e) isRightMB = e.which == 3; else if ("button" in e) isRightMB = e.button == 2;
	
	if(touch){
		ex=e.changedTouches[0].pageX;
		ey=e.changedTouches[0].pageY;
	}
	var offset = $('#draw-desk-img').offset();
	var posY = offset.top;
	var posX = offset.left;
	var td=$('#tplData').get(0);
	tplSet=false;
	if(!isRightMB){
		if(tplZoom!=100){
			var newWidth=Math.floor(tplWidth/100*tplZoom);
			var newHeight=Math.floor(tplHeight/100*tplZoom);
			context.drawImage($('#tplData').get(0), ex-posX-Math.round(td.width/2), ey-posY-Math.round(td.height/2), newWidth, newHeight);
		} else context.drawImage($('#tplData').get(0), ex-posX-Math.round(td.width/2), ey-posY-Math.round(td.height/2));
		history_box.push(context.getImageData(0, 0, canvas.width, canvas.height));
		drawing=true;
	}
	$('#tplData').hide();
	$('#cancelTplSet').hide();
}
function draw_omm(e,touch){
	if(e.altKey || (touch && e.changedTouches.length==2)){
		//var offset2 = $('#eraser').offset();		
		var ex=e.pageX;
		var ey=e.pageY;
		if(touch){
			ex=Math.floor(e.changedTouches[0].pageX+(e.changedTouches[1].pageX-e.changedTouches[0].pageX)/2);
			ey=Math.floor(e.changedTouches[0].pageY+(e.changedTouches[1].pageY-e.changedTouches[0].pageY)/2);
		}
		$('#eraser').css('left',(ex-/*25*/13)+'px');
		$('#eraser').css('top',(ey-/*25*/13)+'px');
		$('#eraser').show();
		erase=true;
	} else {
		$('#eraser').hide();
		erase=false;
	}
	if(tplSet){
		tplMM(e,touch);
		return false;
	}
	if(mouse_down){		
		var offset = $('#draw-desk-img').offset();
		var posY = offset.top/* - window.scrollTop*/;
		var posX = offset.left/* - window.scrollLeft*/;
		var new_y=my;
		var new_x=mx;
		if(touch && e.changedTouches.length>2) return false;
		if(erase || (touch && e.changedTouches.length==2)){
				if(touch){
					new_x=ex-posX;
					new_y=ey-posY;
				}
				cutCircle(context,ex-posX,ey-posY,/*25*/13);
				draw_omm_helper(ex,ey,posX,posY);
				drawing=true;
		} else {
			if(touch){				
				if(e.changedTouches.length!=1) return false;
				new_y=e.changedTouches[0].pageY-posY;
				new_x=e.changedTouches[0].pageX-posX;
				//if(Math.floor(Math.sqrt(Math.pow(Math.abs(new_x-mx))+Math.pow(Math.abs(new_y-my))))>10) return false;
				if(Math.abs(new_x-mx)>100 || Math.abs(new_y-my)>100) return false;
			} else {
				if(!e.shiftKey) new_y=e.pageY-posY;
				if(!e.ctrlKey) new_x=e.pageX-posX;
			}
			if(mx!=-10000){
				drawing=true;
				context.beginPath();
				draw_omm_helper2();
				context.moveTo(mx,my);
				context.lineTo(new_x,new_y);
				context.stroke();
			}
		}
		mx=new_x;
		my=new_y;
	}
}