import { SvelteComponentTyped } from "svelte";
import type { SvelteHTMLElements } from "svelte/elements";

export interface RangeSliderChangeDetail {
  value: number;
  valueUpper: number;
}

export type ActiveHandle = "lower" | "upper";

export type PointerLikeEvent = MouseEvent | TouchEvent;

type $RestProps = SvelteHTMLElements["div"];

type $Props = {
  /**
   * Specify the lower bound value of the slider.
   * @default 0
   */
  value?: number;

  /**
   * Specify the upper bound value of the slider.
   * @default 100
   */
  valueUpper?: number;

  /**
   * Set the maximum slider value
   * @default 100
   */
  max?: number;

  /**
   * Specify the label for the max value
   * @default ""
   */
  maxLabel?: string;

  /**
   * Set the minimum slider value
   * @default 0
   */
  min?: number;

  /**
   * Specify the label for the min value
   * @default ""
   */
  minLabel?: string;

  /**
   * Set the step value
   * @default 1
   */
  step?: number;

  /**
   * Set the step multiplier value
   * @default 4
   */
  stepMultiplier?: number;

  /**
   * Set to `true` to require a value
   * @default false
   */
  required?: boolean;

  /**
   * Specify the input type
   * @default "number"
   */
  inputType?: string;

  /**
   * Set to `true` to disable the slider
   * @default false
   */
  disabled?: boolean;

  /**
   * Set to `true` to use the read-only variant
   * @default false
   */
  readonly?: boolean;

  /**
   * Set to `true` to enable the light variant
   * @default false
   */
  light?: boolean;

  /**
   * Set to `true` to hide the text inputs
   * @default false
   */
  hideTextInput?: boolean;

  /**
   * Set to `true` for the slider to span
   * the full width of its containing element.
   * @default false
   */
  fullWidth?: boolean;

  /**
   * Set an id for the slider div element
   * @default `ccs-${Math.random().toString(36)}`
   */
  id?: string;

  /**
   * Set to `true` to indicate an invalid state
   * @default false
   */
  invalid?: boolean;

  /**
   * Specify the invalid state text
   * @default ""
   */
  invalidText?: string;

  /**
   * Set to `true` to indicate a warning state
   * @default false
   */
  warn?: boolean;

  /**
   * Specify the warning state text
   * @default ""
   */
  warnText?: string;

  /**
   * Specify the label text.
   * Alternatively, use the "labelChildren" slot.
   * @example
   * ```svelte
   * <RangeSlider>
   *   <span slot="labelChildren">Custom Label</span>
   * </RangeSlider>
   * ```
   * @default ""
   */
  labelText?: string;

  /**
   * Set to `true` to visually hide the label text
   * @default false
   */
  hideLabel?: boolean;

  /**
   * Set a name for the lower bound input element
   * @default ""
   */
  name?: string;

  /**
   * Set a name for the upper bound input element
   * @default ""
   */
  nameUpper?: string;

  /**
   * Specify the `aria-label` for the lower bound input and handle
   * @default "Lower bound"
   */
  ariaLabelInput?: string;

  /**
   * Specify the `aria-label` for the upper bound input and handle
   * @default "Upper bound"
   */
  ariaLabelInputUpper?: string;

  /**
   * Obtain a reference to the HTML element.
   * @default null
   */
  ref?: null | HTMLDivElement;

  labelChildren?: (this: void) => void;

  [key: `data-${string}`]: unknown;
};

export type RangeSliderProps = Omit<$RestProps, keyof $Props> & $Props;

export default class RangeSlider extends SvelteComponentTyped<
  RangeSliderProps,
  {
    change: CustomEvent<{ value: number; valueUpper: number }>;
    click: WindowEventMap["click"];
    input: CustomEvent<{ value: number; valueUpper: number }>;
    mouseenter: WindowEventMap["mouseenter"];
    mouseleave: WindowEventMap["mouseleave"];
    mouseover: WindowEventMap["mouseover"];
  },
  { labelChildren: Record<string, never> }
> {}