var mouse;

function Mouse(cursorelem){
	var State = function(position, buttons){
		this.position = position;
		this.buttons = buttons;
		this.timestamp = Date.now() - basetime;
	}
	State.prototype.copy = function(){
		return new State(this.position, this.buttons);
	}
	State.prototype.toWireFormat = function(){
		var buf = "m".toUTF8Array();
		buf = buf.concat(pad11(this.position.x));
		buf = buf.concat(pad11(this.position.y));
		buf = buf.concat(pad11(this.buttons));
		buf = buf.concat(pad11(this.timestamp));
		return buf;
	}
	State.prototype.bound = function(){
		if(this.position.x > Draw9p.rootcanvas.width){
			this.position.x = Draw9p.rootcanvas.width;
		}
		if(this.position.x < 0){
			this.position.x = 0;
		}
		if(this.position.y > Draw9p.rootcanvas.height){
			this.position.y = Draw9p.rootcanvas.height;
		}
		if(this.position.y < 0){
			this.position.y = 0;
		}
	}

	this.states = {down: 1, up: 0};
	this.state = new State({x: 0, y: 0}, 0);

	this.usefkeys = false;
	this.callbacks = [];
	this.buf = [];

	this.handlefkeys = function(e, state){
		if(!this.usefkeys){
		    return true;
		}
		switch(e.keyCode){
		case 112:
		    this.state.buttons = (this.state.buttons& ~1) | state<<0;
		    break;
		case 113:
		    this.state.buttons = (this.state.buttons& ~2) | state<<1;
		    break;
		case 114:
		    this.state.buttons = (this.state.buttons& ~4) | state<<2;
		    break;
		default:
		    return true;
		}
		this.generatemovement(this.state);
		return false;
	}

	this.handlebutton = function(e, state){
		this.state.buttons = (this.state.buttons& ~(1<<e.button)) |
			state<<e.button;
		this.generatemovement(this.state);

		e.preventDefault();
		e.stopPropagation();
		return false;
	}

	this.handlemove = function(e){
		this.state.position.x +=
			e.movementX ||
			e.mozMovementX ||
			e.webkitMovementX ||
			0;

		this.state.position.y +=
			e.movementY ||
			e.mozMovementY ||
			e.webkitMovementY ||
			0;

		this.state.bound();
		this.generatemovement(this.state);
		return false;
}

	this.handlewarp = function(data){
		var ai = new ArrayIterator(data);

		if(ai.getChar() != "m".charCodeAt(0)){
			throw("bad mouse write");
		}
		var x = ai.strtoul();
		var y = ai.strtoul();

		this.state.position.x = x;
		this.state.position.y = y;
		this.state.bound();

		this.generatemovement(this.state);
		return data.length;
	}

	this.generatemovement = function(state){
		//cons.write("m " + state.position.x + ", " + state.position.y +
		//	" : " + state.buttons);
		this.cursor.goto(this.state.position);
		this.buf.push(this.state.copy());
		this.flushcallbacks();
	}

	this.addcallback = function(callback){
		this.callbacks.push(callback);
		this.flushcallbacks();
	}

	this.flushcallbacks = function(){
		while(this.callbacks.length > 0 && this.buf.length > 0){
			this.callbacks.shift().read(this.buf.shift().toWireFormat());
		}
	}

	this.cursor = {
		arrow: [
			0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,

			0xFF, 0xFF, 0x80, 0x01, 0x80, 0x02, 0x80, 0x0C, 
			0x80, 0x10, 0x80, 0x10, 0x80, 0x08, 0x80, 0x04, 
			0x80, 0x02, 0x80, 0x01, 0x80, 0x02, 0x8C, 0x04, 
			0x92, 0x08, 0x91, 0x10, 0xA0, 0xA0, 0xC0, 0x40, 

			0x00, 0x00, 0x7F, 0xFE, 0x7F, 0xFC, 0x7F, 0xF0, 
			0x7F, 0xE0, 0x7F, 0xE0, 0x7F, 0xF0, 0x7F, 0xF8, 
			0x7F, 0xFC, 0x7F, 0xFE, 0x7F, 0xFC, 0x73, 0xF8, 
			0x61, 0xF0, 0x60, 0xE0, 0x40, 0x40, 0x00, 0x00, 
		],
		img: (function(elem){
			var c = elem;
			c.width = c.height = 16;
			return {
				canvas: c,
				ctx: c.getContext("2d"),
				clear: function(){
					this.ctx.clearRect(0, 0, 16, 16);
				},
				fill: function(data, px){
					var id = this.ctx.getImageData(0, 0, 16, 16);
					var cp = 0; /* canvas pointer */
					for(var i=0; i<32; ++i){
						for(var b=7; b>=0; --b){
							var p = (data[i]>>b) & 1;
							if(p){
								id.data[cp++] = px;
								id.data[cp++] = px;
								id.data[cp++] = px;
								id.data[cp++] = 0xFF;
							}else{
								cp += 4;
							}
						}
					}
					this.ctx.putImageData(id, 0, 0);
				}
			};
		})(cursorelem),
		offset: {x: 0, y: 0},
		write: function(data){
			if(data.length != 72){
				data = this.arrow;
			}
			this.img.clear();
			var ai = new ArrayIterator(data);
			this.offset = ai.getPoint();
			this.img.fill(ai.getBytes(32), 0xFF);
			this.img.fill(ai.getBytes(32), 0x00);
			return data.length;
		},
		goto: function(pos){
			var x = pos.x - this.offset.x;
			var y = pos.y - this.offset.y;
			this.img.canvas.style.left = x + "px";
			this.img.canvas.style.top = y + "px";
		}
	}
	this.cursor.write([]);

}