/**
 * The LineSeries class renders quantitative data on a graph by connecting relevant data points.
 *
 * @module charts
 * @class LineSeries
 * @extends CartesianSeries
 * @uses Lines
 * @constructor
 */
Y.LineSeries = Y.Base.create("lineSeries", Y.CartesianSeries, [Y.Lines], {
    /**
     * @protected
     *
     * @method drawSeries
     */
    drawSeries: function()
    {
        this.drawLines();
    },

    /**
     * @protected
     *
     * Method used by `styles` setter. Overrides base implementation.
     *
     * @method _setStyles
     * @param {Object} newStyles Hash of properties to update.
     * @return Object
     */
    _setStyles: function(val)
    {
        if(!val.line)
        {
            val = {line:val};
        }
        return Y.LineSeries.superclass._setStyles.apply(this, [val]);
    },

    /**
     * @protected
     *
     * Gets the default value for the `styles` attribute. Overrides
     * base implementation.
     *
     * @method _getDefaultStyles
     * @return Object
     */
    _getDefaultStyles: function()
    {
        var styles = this._mergeStyles({line:this._getLineDefaults()}, Y.LineSeries.superclass._getDefaultStyles());
        return styles;
    }
},
{
    ATTRS: {
        /**
         * Read-only attribute indicating the type of series.
         *
         * @attribute type
         * @type String
         * @default line
         */
        type: {
            value:"line"
        }

        /**
         * Style properties used for drawing lines. This attribute is inherited from `Renderer`. Below are the default values:
         *  <dl>
         *      <dt>color</dt><dd>The color of the line. The default value is determined by the order of the series on the graph. The color will be
         *      retrieved from the following array: 
         *      `["#426ab3", "#d09b2c", "#000000", "#b82837", "#b384b5", "#ff7200", "#779de3", "#cbc8ba", "#7ed7a6", "#007a6c"]`
         *      <dt>weight</dt><dd>Number that indicates the width of the line. The default value is 6.</dd>
         *      <dt>alpha</dt><dd>Number between 0 and 1 that indicates the opacity of the line. The default value is 1.</dd>
         *      <dt>lineType</dt><dd>Indicates whether the line is solid or dashed. The default value is solid.</dd> 
         *      <dt>dashLength</dt><dd>When the `lineType` is dashed, indicates the length of the dash. The default value is 10.</dd>
         *      <dt>gapSpace</dt><dd>When the `lineType` is dashed, indicates the distance between dashes. The default value is 10.</dd>
         *      <dt>connectDiscontinuousPoints</dt><dd>Indicates whether or not to connect lines when there is a missing or null value between points. The default value is true.</dd> 
         *      <dt>discontinuousType</dt><dd>Indicates whether the line between discontinuous points is solid or dashed. The default value is solid.</dd>
         *      <dt>discontinuousDashLength</dt><dd>When the `discontinuousType` is dashed, indicates the length of the dash. The default value is 10.</dd>
         *      <dt>discontinuousGapSpace</dt><dd>When the `discontinuousType` is dashed, indicates the distance between dashes. The default value is 10.</dd>
         *  </dl>
         *
         * @attribute styles
         * @type Object
         */
    }
});