declare module 'svg-gauge' {
  export interface GaugeInstance {
    setMaxValue: (max: number) => void
    setValue: (val: number) => void
    setValueAnimated: (val: number, duration: number) => void
    getValue: () => number
  }

  export interface GaugeOptions {
    /** The angle in degrees to start the dial
     * @default 135
     */
    dialStartAngle?: number
    /** The angle in degrees to end the dial. This MUST be less than dialStartAngle
     * @default 45
     */
    dialEndAngle?: number
    /** The radius of the gauge
     * @default 40
     */
    radius?: number
    /** The minimum value for the gauge. This can be a negative value
     * @default 0
     */
    min?: number
    /** The maximum value for the gauge
     * @default 100
     */
    max?: number
    /** Getter for the label that will be rendered in the center. */
    label?: (currentValue: number) => string
    /** Whether to show the value at the center of the gauge
     * @default true
     */
    showValue?: boolean
    /** The CSS class of the gauge
     * @default 'gauge'
     */
    gaugeClass?: string
    /** The CSS class of the gauge's dial
     * @default 'dial'
     */
    dialClass?: string
    /** The CSS class of the gauge's fill
     * @default 'value'
     */
    valueDialClass?: string
    /** The CSS class of the gauge's text
     * @default '(value-text)'
     */
    valueClass?: string
    /** An optional function that can return a color for current value
     */
    color?: (currentValue: number) => string
    /** An optional string that specifies the crop region
     * @default '(0 0 100 100)'
     */
    viewBox?: string
  }

  /**
   * Creates a Gauge instance.
   * @param {Element} element The DOM into which to render the gauge
   * @param {GaugeOptions} options The gauge options
   */
  const createInstance: (element: Element, options?: GaugeOptions) => GaugeInstance

  export default createInstance
}