import type { Screen, ScreenContext } from "./screen";

export class ScreenManager {
  private currentScreen: Screen;
  private context: ScreenContext;

  constructor(initialScreen: Screen) {
    this.currentScreen = initialScreen;
    this.context = {
      navigate: (screen: Screen) => {
        this.currentScreen = screen;
      },
    };
  }

  renderTop(ctx: CanvasRenderingContext2D) {
    ctx.clearRect(0, 0, 256, 192);
    ctx.save();
    this.currentScreen.renderTop(ctx);
    ctx.restore();
  }

  renderBottom(ctx: CanvasRenderingContext2D) {
    ctx.clearRect(0, 0, 256, 192);
    ctx.save();
    this.currentScreen.renderBottom(ctx);
    ctx.restore();
  }

  handleTouch(x: number, y: number) {
    if (this.currentScreen.handleTouch) {
      this.currentScreen.handleTouch(x, y, this.context);
    }
  }
}