import { Game } from '../Game';
import {
  ExampleHTMLProperties,
  exampleHTMLDefaultProperties,
} from '../structs/ExampleHTMLProperties';
import { GameSettings, defaultGameSettings } from '../structs/GameSettings';
import { ExampleHTML } from './ExampleHTML';

/**
 * Helps with creating game page.
 * @group Tools
 */
export class DefaultGame {
  static Create(
    gameProps?: GameSettings,
    pageProps?: ExampleHTMLProperties,
    canvasSize = 1
  ): Game {
    pageProps = { ...exampleHTMLDefaultProperties, ...pageProps };
    ExampleHTML.Render(pageProps);
    if (!(pageProps.document instanceof Document)) {
      if (document instanceof Document) {
        pageProps.document = document;
      } else {
        throw new Error(
          "Default DOM cannot be assigned! Please assign document to 'document' property"
        );
      }
    }
    const canvas = pageProps.document.getElementById(
      'gameCanvas'
    ) as HTMLCanvasElement;
    if (canvas === undefined) throw new Error('Cannot get canvas!');
    const gameSettings = { ...defaultGameSettings, ...gameProps };
    gameSettings.canvas = canvas;
    const game = new Game(gameSettings);
    game.RescaleCanvasToParentElement(canvasSize);
    return game;
  }
}