import type { Container, FederatedMouseEvent, FederatedPointerEvent, FederatedWheelEvent } from 'pixi.js';
import type { World } from '../runtime/World';
import { isInside, screenToWorld, type View, wheelNotches } from './view';

/**
 * Hands the mouse over `target` to a running world: position, left button and wheel. Shared by the
 * editor's game view and a released game (#266). Outside the camera frame counts as "not in view":
 * that region is letterbox, not game.
 */
export function routePointer(target: Container, world: () => World | null, view: () => View | null): void {
  const report = (e: FederatedMouseEvent): void => {
    const w = world();
    const v = view();
    if (!w || !v) return;
    const local = target.toLocal(e.global);
    const point = screenToWorld(v, local.x, local.y);
    w.movePointer(point.x, point.y, isInside(v, local.x, local.y));
  };
  target.on('pointerdown', (e: FederatedPointerEvent) => {
    if (e.button !== 0) return;
    report(e);
    world()?.setPointerDown(true);
  });
  target.on('globalpointermove', (e: FederatedPointerEvent) => report(e));
  target.on('pointerup', () => world()?.setPointerDown(false));
  target.on('pointerupoutside', () => world()?.setPointerDown(false));
  target.on('wheel', (e: FederatedWheelEvent) => {
    report(e);
    world()?.turnWheel(wheelNotches(e.deltaY, e.deltaMode));
  });
}