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function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

import { useRef, useMemo } from 'react';
import { invariant } from '@react-dnd/invariant';
import { useMonitorOutput } from './internal/useMonitorOutput';
import { useIsomorphicLayoutEffect } from './internal/useIsomorphicLayoutEffect';
import { useDragSourceMonitor, useDragHandler } from './internal/drag';
/**
 * useDragSource hook
 * @param sourceSpec The drag source specification *
 */

export function useDrag(spec) {
  var specRef = useRef(spec);
  specRef.current = spec; // TODO: wire options into createSourceConnector

invariant(spec.item != null, 'item must be defined');
  invariant(spec.item.type != null, 'item type must be defined');

var _useDragSourceMonitor = useDragSourceMonitor(),
      _useDragSourceMonitor2 = _slicedToArray(_useDragSourceMonitor, 2),
      monitor = _useDragSourceMonitor2[0],
      connector = _useDragSourceMonitor2[1];

useDragHandler(specRef, monitor, connector);
  var result = useMonitorOutput(monitor, specRef.current.collect || function () {
    return {};
  }, function () {
    return connector.reconnect();
  });
  var connectDragSource = useMemo(function () {
    return connector.hooks.dragSource();
  }, [connector]);
  var connectDragPreview = useMemo(function () {
    return connector.hooks.dragPreview();
  }, [connector]);
  useIsomorphicLayoutEffect(function () {
    connector.dragSourceOptions = specRef.current.options || null;
    connector.reconnect();
  }, [connector]);
  useIsomorphicLayoutEffect(function () {
    connector.dragPreviewOptions = specRef.current.previewOptions || null;
    connector.reconnect();
  }, [connector]);
  return [result, connectDragSource, connectDragPreview];
}