/** @module wxt/utils/content-script-ui/types */

export interface ContentScriptUi<TMounted> extends MountFunctions {
  mounted: TMounted | undefined;
}

export type ContentScriptUiOptions<TMounted> = ContentScriptPositioningOptions &
  ContentScriptAnchoredOptions & {
    /**
     * Callback called before the UI is removed from the webpage. Use to cleanup your UI, like
     * unmounting your Vue or React apps.
     *
     * Note that this callback is called only when `ui.remove` is called - that means it is
     * not called automatically when the anchor is removed, unless you use `autoMount`.
     */
    onRemove?: (mounted: TMounted | undefined) => void;
  };

export type ContentScriptOverlayAlignment =
  | 'top-left'
  | 'top-right'
  | 'bottom-left'
  | 'bottom-right';

/**
 * ![Visualization of different append modes](https://wxt.dev/content-script-ui-append.png)
 */
export type ContentScriptAppendMode =
  | 'last'
  | 'first'
  | 'replace'
  | 'before'
  | 'after'
  | ((anchor: Element, ui: Element) => void);

export interface ContentScriptInlinePositioningOptions {
  position: 'inline';
}

export interface ContentScriptOverlayPositioningOptions {
  position: 'overlay';
  /**
   * The `z-index` used on the `wrapper` element. Set to a positive number to show your UI over website
   * content.
   */
  zIndex?: number;
  /**
   * When using `type: "overlay"`, the mounted element is 0px by 0px in size. Alignment specifies
   * which corner is aligned with that 0x0 pixel space.
   *
   * ![Visualization of alignment options](https://wxt.dev/content-script-ui-alignment.png)
   *
   * @default "top-left"
   */
  alignment?: ContentScriptOverlayAlignment;
}

export interface ContentScriptModalPositioningOptions {
  position: 'modal';
  /**
   * The `z-index` used on the `shadowHost`. Set to a positive number to show your UI over website
   * content.
   */
  zIndex?: number;
}

/**
 * Choose between `"inline"`, `"overlay"`, or `"modal"` positions.
 *
 * ![Visualization of different types](https://wxt.dev/content-script-ui-position.png)
 */
export type ContentScriptPositioningOptions =
  | ContentScriptInlinePositioningOptions
  | ContentScriptOverlayPositioningOptions
  | ContentScriptModalPositioningOptions;

export interface ContentScriptAnchoredOptions {
  /**
   * A CSS selector, XPath expression, element, or function that returns one of the three. Along with `append`, the
   * `anchor` dictates where in the page the UI will be added.
   */
  anchor?:
    | string
    | Element
    | null
    | undefined
    | (() => string | Element | null | undefined);
  /**
   * In combination with `anchor`, decide how to add the UI to the DOM.
   *
   * - `"last"` (default) - Add the UI as the last child of the `anchor` element
   * - `"first"` - Add the UI as the first child of the `anchor` element
   * - `"replace"` - Replace the `anchor` element with the UI.
   * - `"before"` - Add the UI as the sibling before the `anchor` element
   * - `"after"` - Add the UI as the sibling after the `anchor` element
   * - `(anchor, ui) => void` - Customizable function that let's you add the UI to the DOM
   */
  append?: ContentScriptAppendMode | ((anchor: Element, ui: Element) => void);
}

export interface BaseMountFunctions {
  /**
   * Function that mounts or remounts the UI on the page.
   */
  mount: () => void;

  /**
   * Function that removes the UI from the webpage.
   */
  remove: () => void;
}

export interface MountFunctions extends BaseMountFunctions {
  /**
   * Call `ui.autoMount()` to automatically mount and remove the UI as the anchor is dynamically added/removed by the webpage.
   */
  autoMount: (options?: AutoMountOptions) => void;
}

export type AutoMountOptions = {
  /**
   * When true, only mount and unmount a UI once.
   */
  once?: boolean;
  /**
   * The callback triggered when `StopAutoMount` is called.
   */
  onStop?: () => void;
};
export type StopAutoMount = () => void;
export interface AutoMount {
  /**
   * Stop watching the anchor element for changes, but keep the UI mounted.
   */
  stopAutoMount: StopAutoMount;
}
