import { assert } from "console";
import { helper } from "./helper";

// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

export type Modifier = 'Alt' | 'Control' | 'Meta' | 'Shift';
export type Button = 'left' | 'right' | 'middle';

type Point = {
  x: number;
  y: number;
};

export type PointerActionOptions = {
  modifiers?: Modifier[];
  relativePoint?: Point;
};

export type ClickOptions = PointerActionOptions & {
  delay?: number;
  button?: Button;
  clickCount?: number;
};

export type MultiClickOptions = PointerActionOptions & {
  delay?: number;
  button?: Button;
};

export type SelectOption = {
  value?: string;
  label?: string;
  index?: number;
};

export const selectFunction = (element: HTMLSelectElement, ...optionsToSelect: (Node | SelectOption)[]) => {
  if (element.nodeName.toLowerCase() !== 'select')
    throw new Error('Element is not a <select> element.');

  const options = Array.from(element.options);
  element.value = undefined;
  for (let index = 0; index < options.length; index++) {
    const option = options[index];
    option.selected = optionsToSelect.some(optionToSelect => {
      if (optionToSelect instanceof Node)
        return option === optionToSelect;
      let matches = true;
      if (optionToSelect.value !== undefined)
        matches = matches && optionToSelect.value === option.value;
      if (optionToSelect.label !== undefined)
        matches = matches && optionToSelect.label === option.label;
      if (optionToSelect.index !== undefined)
        matches = matches && optionToSelect.index === index;
      return matches;
    });
    if (option.selected && !element.multiple)
      break;
  }
  element.dispatchEvent(new Event('input', { 'bubbles': true }));
  element.dispatchEvent(new Event('change', { 'bubbles': true }));
  return options.filter(option => option.selected).map(option => option.value);
};