import { computePosition, arrow as arrow$2, autoPlacement as autoPlacement$1, flip as flip$1, hide as hide$1, inline as inline$1, limitShift as limitShift$1, offset as offset$1, shift as shift$1, size as size$1 } from '@floating-ui/dom';
export { autoUpdate, computePosition, detectOverflow, getOverflowAncestors, platform } from '@floating-ui/dom';
import * as React from 'react';
import { useLayoutEffect } from 'react';
import * as ReactDOM from 'react-dom';

var isClient = typeof document !== 'undefined';

var noop = function noop() {};
var index = isClient ? useLayoutEffect : noop;

// Fork of `fast-deep-equal` that only does the comparisons we need and compares
// functions
function deepEqual(a, b) {
  if (a === b) {
    return true;
  }
  if (typeof a !== typeof b) {
    return false;
  }
  if (typeof a === 'function' && a.toString() === b.toString()) {
    return true;
  }
  let length;
  let i;
  let keys;
  if (a && b && typeof a === 'object') {
    if (Array.isArray(a)) {
      length = a.length;
      if (length !== b.length) return false;
      for (i = length; i-- !== 0;) {
        if (!deepEqual(a[i], b[i])) {
          return false;
        }
      }
      return true;
    }
    keys = Object.keys(a);
    length = keys.length;
    if (length !== Object.keys(b).length) {
      return false;
    }
    for (i = length; i-- !== 0;) {
      if (!{}.hasOwnProperty.call(b, keys[i])) {
        return false;
      }
    }
    for (i = length; i-- !== 0;) {
      const key = keys[i];
      if (key === '_owner' && a.$$typeof) {
        continue;
      }
      if (!deepEqual(a[key], b[key])) {
        return false;
      }
    }
    return true;
  }
  return a !== a && b !== b;
}

function getDPR(element) {
  if (typeof window === 'undefined') {
    return 1;
  }
  const win = element.ownerDocument.defaultView || window;
  return win.devicePixelRatio || 1;
}

function roundByDPR(element, value) {
  const dpr = getDPR(element);
  return Math.round(value * dpr) / dpr;
}

function useLatestRef(value) {
  const ref = React.useRef(value);
  index(() => {
    ref.current = value;
  });
  return ref;
}

/**
 * Provides data to position a floating element.
 * @see https://floating-ui.com/docs/useFloating
 */
function useFloating(options) {
  if (options === void 0) {
    options = {};
  }
  const {
    placement = 'bottom',
    strategy = 'absolute',
    middleware = [],
    platform,
    elements: {
      reference: externalReference,
      floating: externalFloating
    } = {},
    transform = true,
    whileElementsMounted,
    open
  } = options;
  const [data, setData] = React.useState({
    x: 0,
    y: 0,
    strategy,
    placement,
    middlewareData: {},
    isPositioned: false
  });
  const [latestMiddleware, setLatestMiddleware] = React.useState(middleware);
  if (!deepEqual(latestMiddleware, middleware)) {
    setLatestMiddleware(middleware);
  }
  const [_reference, _setReference] = React.useState(null);
  const [_floating, _setFloating] = React.useState(null);
  const setReference = React.useCallback(node => {
    if (node !== referenceRef.current) {
      referenceRef.current = node;
      _setReference(node);
    }
  }, []);
  const setFloating = React.useCallback(node => {
    if (node !== floatingRef.current) {
      floatingRef.current = node;
      _setFloating(node);
    }
  }, []);
  const referenceEl = externalReference || _reference;
  const floatingEl = externalFloating || _floating;
  const referenceRef = React.useRef(null);
  const floatingRef = React.useRef(null);
  const dataRef = React.useRef(data);
  const hasWhileElementsMounted = whileElementsMounted != null;
  const whileElementsMountedRef = useLatestRef(whileElementsMounted);
  const platformRef = useLatestRef(platform);
  const openRef = useLatestRef(open);
  const update = React.useCallback(() => {
    if (!referenceRef.current || !floatingRef.current) {
      return;
    }
    const config = {
      placement,
      strategy,
      middleware: latestMiddleware
    };
    if (platformRef.current) {
      config.platform = platformRef.current;
    }
    computePosition(referenceRef.current, floatingRef.current, config).then(data => {
      const fullData = {
        ...data,
        // The floating element's position may be recomputed while it's closed
        // but still mounted (such as when transitioning out). To ensure
        // `isPositioned` will be `false` initially on the next open, avoid
        // setting it to `true` when `open === false` (must be specified).
        isPositioned: openRef.current !== false
      };
      if (isMountedRef.current && !deepEqual(dataRef.current, fullData)) {
        dataRef.current = fullData;
        ReactDOM.flushSync(() => {
          setData(fullData);
        });
      }
    });
  }, [latestMiddleware, placement, strategy, platformRef, openRef]);
  index(() => {
    if (open === false && dataRef.current.isPositioned) {
      dataRef.current.isPositioned = false;
      setData(data => ({
        ...data,
        isPositioned: false
      }));
    }
  }, [open]);
  const isMountedRef = React.useRef(false);
  index(() => {
    isMountedRef.current = true;
    return () => {
      isMountedRef.current = false;
    };
  }, []);
  index(() => {
    if (referenceEl) referenceRef.current = referenceEl;
    if (floatingEl) floatingRef.current = floatingEl;
    if (referenceEl && floatingEl) {
      if (whileElementsMountedRef.current) {
        return whileElementsMountedRef.current(referenceEl, floatingEl, update);
      }
      update();
    }
  }, [referenceEl, floatingEl, update, whileElementsMountedRef, hasWhileElementsMounted]);
  const refs = React.useMemo(() => ({
    reference: referenceRef,
    floating: floatingRef,
    setReference,
    setFloating
  }), [setReference, setFloating]);
  const elements = React.useMemo(() => ({
    reference: referenceEl,
    floating: floatingEl
  }), [referenceEl, floatingEl]);
  const floatingStyles = React.useMemo(() => {
    const initialStyles = {
      position: strategy,
      left: 0,
      top: 0
    };
    if (!elements.floating) {
      return initialStyles;
    }
    const x = roundByDPR(elements.floating, data.x);
    const y = roundByDPR(elements.floating, data.y);
    if (transform) {
      return {
        ...initialStyles,
        transform: "translate(" + x + "px, " + y + "px)",
        ...(getDPR(elements.floating) >= 1.5 && {
          willChange: 'transform'
        })
      };
    }
    return {
      position: strategy,
      left: x,
      top: y
    };
  }, [strategy, transform, elements.floating, data.x, data.y]);
  return React.useMemo(() => ({
    ...data,
    update,
    refs,
    elements,
    floatingStyles
  }), [data, update, refs, elements, floatingStyles]);
}

/**
 * Provides data to position an inner element of the floating element so that it
 * appears centered to the reference element.
 * This wraps the core `arrow` middleware to allow React refs as the element.
 * @see https://floating-ui.com/docs/arrow
 */
const arrow$1 = options => {
  function isRef(value) {
    return {}.hasOwnProperty.call(value, 'current');
  }
  return {
    name: 'arrow',
    options,
    fn(state) {
      const {
        element,
        padding
      } = typeof options === 'function' ? options(state) : options;
      if (element && isRef(element)) {
        if (element.current != null) {
          return arrow$2({
            element: element.current,
            padding
          }).fn(state);
        }
        return {};
      }
      if (element) {
        return arrow$2({
          element,
          padding
        }).fn(state);
      }
      return {};
    }
  };
};

/**
 * Modifies the placement by translating the floating element along the
 * specified axes.
 * A number (shorthand for `mainAxis` or distance), or an axes configuration
 * object may be passed.
 * @see https://floating-ui.com/docs/offset
 */
const offset = (options, deps) => {
  const result = offset$1(options);
  return {
    name: result.name,
    fn: result.fn,
    options: [options, deps]
  };
};

/**
 * Optimizes the visibility of the floating element by shifting it in order to
 * keep it in view when it will overflow the clipping boundary.
 * @see https://floating-ui.com/docs/shift
 */
const shift = (options, deps) => {
  const result = shift$1(options);
  return {
    name: result.name,
    fn: result.fn,
    options: [options, deps]
  };
};

/**
 * Built-in `limiter` that will stop `shift()` at a certain point.
 */
const limitShift = (options, deps) => {
  const result = limitShift$1(options);
  return {
    fn: result.fn,
    options: [options, deps]
  };
};

/**
 * Optimizes the visibility of the floating element by flipping the `placement`
 * in order to keep it in view when the preferred placement(s) will overflow the
 * clipping boundary. Alternative to `autoPlacement`.
 * @see https://floating-ui.com/docs/flip
 */
const flip = (options, deps) => {
  const result = flip$1(options);
  return {
    name: result.name,
    fn: result.fn,
    options: [options, deps]
  };
};

/**
 * Provides data that allows you to change the size of the floating element —
 * for instance, prevent it from overflowing the clipping boundary or match the
 * width of the reference element.
 * @see https://floating-ui.com/docs/size
 */
const size = (options, deps) => {
  const result = size$1(options);
  return {
    name: result.name,
    fn: result.fn,
    options: [options, deps]
  };
};

/**
 * Optimizes the visibility of the floating element by choosing the placement
 * that has the most space available automatically, without needing to specify a
 * preferred placement. Alternative to `flip`.
 * @see https://floating-ui.com/docs/autoPlacement
 */
const autoPlacement = (options, deps) => {
  const result = autoPlacement$1(options);
  return {
    name: result.name,
    fn: result.fn,
    options: [options, deps]
  };
};

/**
 * Provides data to hide the floating element in applicable situations, such as
 * when it is not in the same clipping context as the reference element.
 * @see https://floating-ui.com/docs/hide
 */
const hide = (options, deps) => {
  const result = hide$1(options);
  return {
    name: result.name,
    fn: result.fn,
    options: [options, deps]
  };
};

/**
 * Provides improved positioning for inline reference elements that can span
 * over multiple lines, such as hyperlinks or range selections.
 * @see https://floating-ui.com/docs/inline
 */
const inline = (options, deps) => {
  const result = inline$1(options);
  return {
    name: result.name,
    fn: result.fn,
    options: [options, deps]
  };
};

/**
 * Provides data to position an inner element of the floating element so that it
 * appears centered to the reference element.
 * This wraps the core `arrow` middleware to allow React refs as the element.
 * @see https://floating-ui.com/docs/arrow
 */
const arrow = (options, deps) => {
  const result = arrow$1(options);
  return {
    name: result.name,
    fn: result.fn,
    options: [options, deps]
  };
};

export { arrow, autoPlacement, flip, hide, inline, limitShift, offset, shift, size, useFloating };