/* global proportionalSize */

SVG.Polyline = SVG.invent({
  // Initialize node
  create: 'polyline',

  // Inherit from
  inherit: SVG.Shape,

  // Add parent method
  construct: {
    // Create a wrapped polyline element
    polyline: function (p) {
      // make sure plot is called as a setter
      return this.put(new SVG.Polyline()).plot(p || new SVG.PointArray())
    }
  }
})

SVG.Polygon = SVG.invent({
  // Initialize node
  create: 'polygon',

  // Inherit from
  inherit: SVG.Shape,

  // Add parent method
  construct: {
    // Create a wrapped polygon element
    polygon: function (p) {
      // make sure plot is called as a setter
      return this.put(new SVG.Polygon()).plot(p || new SVG.PointArray())
    }
  }
})

// Add polygon-specific functions
SVG.extend([SVG.Polyline, SVG.Polygon], {
  // Get array
  array: function () {
    return this._array || (this._array = new SVG.PointArray(this.attr('points')))
  },

  // Plot new path
  plot: function (p) {
    return (p == null) ? this.array()
      : this.clear().attr('points', typeof p === 'string' ? p
      : (this._array = new SVG.PointArray(p)))
  },

  // Clear array cache
  clear: function () {
    delete this._array
    return this
  },

  // Move by left top corner
  move: function (x, y) {
    return this.attr('points', this.array().move(x, y))
  },

  // Set element size to given width and height
  size: function (width, height) {
    var p = proportionalSize(this, width, height)
    return this.attr('points', this.array().size(p.width, p.height))
  }
})