/* global proportionalSize */

SVG.Circle = SVG.invent({
  // Initialize node
  create: 'circle',

  // Inherit from
  inherit: SVG.Shape,

  // Add parent method
  construct: {
    // Create circle element, based on ellipse
    circle: function (size) {
      return this.put(new SVG.Circle()).rx(new SVG.Number(size).divide(2)).move(0, 0)
    }
  }
})

SVG.extend([SVG.Circle, SVG.FX], {
  // Radius x value
  rx: function (rx) {
    return this.attr('r', rx)
  },
  // Alias radius x value
  ry: function (ry) {
    return this.rx(ry)
  }
})

SVG.Ellipse = SVG.invent({
  // Initialize node
  create: 'ellipse',

  // Inherit from
  inherit: SVG.Shape,

  // Add parent method
  construct: {
    // Create an ellipse
    ellipse: function (width, height) {
      return this.put(new SVG.Ellipse()).size(width, height).move(0, 0)
    }
  }
})

SVG.extend([SVG.Ellipse, SVG.Rect, SVG.FX], {
  // Radius x value
  rx: function (rx) {
    return this.attr('rx', rx)
  },
  // Radius y value
  ry: function (ry) {
    return this.attr('ry', ry)
  }
})

// Add common method
SVG.extend([SVG.Circle, SVG.Ellipse], {
    // Move over x-axis
  x: function (x) {
    return x == null ? this.cx() - this.rx() : this.cx(x + this.rx())
  },
    // Move over y-axis
  y: function (y) {
    return y == null ? this.cy() - this.ry() : this.cy(y + this.ry())
  },
    // Move by center over x-axis
  cx: function (x) {
    return x == null ? this.attr('cx') : this.attr('cx', x)
  },
    // Move by center over y-axis
  cy: function (y) {
    return y == null ? this.attr('cy') : this.attr('cy', y)
  },
    // Set width of element
  width: function (width) {
    return width == null ? this.rx() * 2 : this.rx(new SVG.Number(width).divide(2))
  },
    // Set height of element
  height: function (height) {
    return height == null ? this.ry() * 2 : this.ry(new SVG.Number(height).divide(2))
  },
    // Custom size function
  size: function (width, height) {
    var p = proportionalSize(this, width, height)

    return this
        .rx(new SVG.Number(p.width).divide(2))
        .ry(new SVG.Number(p.height).divide(2))
  }
})