Rickshaw.namespace('Rickshaw.Graph.Renderer.LinePlot');

Rickshaw.Graph.Renderer.LinePlot = Rickshaw.Class.create( Rickshaw.Graph.Renderer, {

	name: 'lineplot',

	defaults: function($super) {

		return Rickshaw.extend( $super(), {
			unstack: true,
			fill: false,
			stroke: true,
			padding:{ top: 0.01, right: 0.01, bottom: 0.01, left: 0.01 },
			dotSize: 3,
			strokeWidth: 2
		} );
	},

	initialize: function($super, args) {
		$super(args);
	},

	seriesPathFactory: function() {

		var graph = this.graph;

		var factory = d3.svg.line()
			.x( function(d) { return graph.x(d.x) } )
			.y( function(d) { return graph.y(d.y) } )
			.interpolate(this.graph.interpolation).tension(this.tension);

		factory.defined && factory.defined( function(d) { return d.y !== null } );
		return factory;
	},

	_renderDots: function() {

		var graph = this.graph;

		graph.series.forEach(function(series) {

			if (series.disabled) return;

			var nodes = graph.vis.selectAll("x")
				.data(series.stack.filter( function(d) { return d.y !== null } ))
				.enter().append("svg:circle")
				.attr("cx", function(d) { return graph.x(d.x) })
				.attr("cy", function(d) { return graph.y(d.y) })
				.attr("r", function(d) { return ("r" in d) ? d.r : graph.renderer.dotSize});

			Array.prototype.forEach.call(nodes[0], function(n) {
				if (!n) return;
				n.setAttribute('data-color', series.color);
				n.setAttribute('fill', 'white');
				n.setAttribute('stroke', series.color);
				n.setAttribute('stroke-width', this.strokeWidth);

			}.bind(this));

		}, this);
	},

	_renderLines: function() {

		var graph = this.graph;

		var nodes = graph.vis.selectAll("path")
			.data(this.graph.stackedData)
			.enter().append("svg:path")
			.attr("d", this.seriesPathFactory());

		var i = 0;
		graph.series.forEach(function(series) {
			if (series.disabled) return;
			series.path = nodes[0][i++];
			this._styleSeries(series);
		}, this);
	},

	render: function() {

		var graph = this.graph;

		graph.vis.selectAll('*').remove();

		this._renderLines();
		this._renderDots();
	}
} );