import type { Dispatch } from "@commands/dispatcher";
import type { GlobalWheelConsumer, WheelInputEvent } from "./pointer";

export function handleViewportWheel(options: {
  event: WheelInputEvent;
  globalConsumer: GlobalWheelConsumer;
  dispatch: Dispatch;
  currentZoom: number;
}): boolean {
  if (options.globalConsumer(options.event)) return true;

  const zoomFactor = Math.exp(-options.event.delta.y * 0.001);
  options.dispatch("viewport.zoomAroundPoint", {
    zoom: options.currentZoom * zoomFactor,
    point: options.event.position,
  });

  return true;
}