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var pgli = pgli || {};
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pgli.diagram = pgli.diagram || {};
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pgli.diagram.Links = gamecore.Base.extend('Links',
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{ // static
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	bezierOffset: 50
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},
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{ // instance
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	diagram: null,
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	shape: null,
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	init: function(diagram)
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	{
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		var static = pgli.diagram.Links;
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		var self = this;
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		this.diagram = diagram;
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		this.shape = new Kinetic.Shape({
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			drawFunc: function(ctx){
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				ctx.beginPath();
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				for(var i = 0, len = self.diagram.nodes.length; i < len; i++)
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				{
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					var node = self.diagram.nodes[i];
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					if(! ("layers" in node.module)) continue;
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					for(var j = 0, _len = node.module.layers.length; j < _len; j++)
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					{
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						if(! ("use" in node.module.layers[j])) continue;
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						var start = node.getLayerSlot(j);
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						var tNode = self.diagram.getNode(node.module.layers[j].use);
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						if(!tNode) continue;
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						var end = tNode.getSlot();
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						ctx.moveTo(start[0], start[1]);
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						ctx.bezierCurveTo(
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							start[0]+static.bezierOffset, start[1],
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							end[0]-static.bezierOffset, end[1],
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							end[0], end[1]);
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					}
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				}
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				this.stroke(ctx);
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			},
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			x: 0,
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			y: 0,
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			stroke: "#999",
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			strokeWidth: 3,
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			lineCap: "round"
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		});
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	}
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});
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