import { proxyCustomElement, HTMLElement, createEvent, h } from '@stencil/core/internal/client';

function getSide(placement) {
  return placement.split('-')[0];
}

function getAlignment(placement) {
  return placement.split('-')[1];
}

function getMainAxisFromPlacement(placement) {
  return ['top', 'bottom'].includes(getSide(placement)) ? 'x' : 'y';
}

function getLengthFromAxis(axis) {
  return axis === 'y' ? 'height' : 'width';
}

function computeCoordsFromPlacement(_ref, placement, rtl) {
  let {
    reference,
    floating
  } = _ref;
  const commonX = reference.x + reference.width / 2 - floating.width / 2;
  const commonY = reference.y + reference.height / 2 - floating.height / 2;
  const mainAxis = getMainAxisFromPlacement(placement);
  const length = getLengthFromAxis(mainAxis);
  const commonAlign = reference[length] / 2 - floating[length] / 2;
  const side = getSide(placement);
  const isVertical = mainAxis === 'x';
  let coords;

  switch (side) {
    case 'top':
      coords = {
        x: commonX,
        y: reference.y - floating.height
      };
      break;

    case 'bottom':
      coords = {
        x: commonX,
        y: reference.y + reference.height
      };
      break;

    case 'right':
      coords = {
        x: reference.x + reference.width,
        y: commonY
      };
      break;

    case 'left':
      coords = {
        x: reference.x - floating.width,
        y: commonY
      };
      break;

    default:
      coords = {
        x: reference.x,
        y: reference.y
      };
  }

  switch (getAlignment(placement)) {
    case 'start':
      coords[mainAxis] -= commonAlign * (rtl && isVertical ? -1 : 1);
      break;

    case 'end':
      coords[mainAxis] += commonAlign * (rtl && isVertical ? -1 : 1);
      break;
  }

  return coords;
}

/**
 * Computes the `x` and `y` coordinates that will place the floating element
 * next to a reference element when it is given a certain positioning strategy.
 *
 * This export does not have any `platform` interface logic. You will need to
 * write one for the platform you are using Floating UI with.
 */

const computePosition$1 = async (reference, floating, config) => {
  const {
    placement = 'bottom',
    strategy = 'absolute',
    middleware = [],
    platform
  } = config;
  const rtl = await (platform.isRTL == null ? void 0 : platform.isRTL(floating));

  let rects = await platform.getElementRects({
    reference,
    floating,
    strategy
  });
  let {
    x,
    y
  } = computeCoordsFromPlacement(rects, placement, rtl);
  let statefulPlacement = placement;
  let middlewareData = {};

  for (let i = 0; i < middleware.length; i++) {

    const {
      name,
      fn
    } = middleware[i];
    const {
      x: nextX,
      y: nextY,
      data,
      reset
    } = await fn({
      x,
      y,
      initialPlacement: placement,
      placement: statefulPlacement,
      strategy,
      middlewareData,
      rects,
      platform,
      elements: {
        reference,
        floating
      }
    });
    x = nextX != null ? nextX : x;
    y = nextY != null ? nextY : y;
    middlewareData = { ...middlewareData,
      [name]: { ...middlewareData[name],
        ...data
      }
    };

    if (reset) {
      if (typeof reset === 'object') {
        if (reset.placement) {
          statefulPlacement = reset.placement;
        }

        if (reset.rects) {
          rects = reset.rects === true ? await platform.getElementRects({
            reference,
            floating,
            strategy
          }) : reset.rects;
        }

        ({
          x,
          y
        } = computeCoordsFromPlacement(rects, statefulPlacement, rtl));
      }

      i = -1;
      continue;
    }
  }

  return {
    x,
    y,
    placement: statefulPlacement,
    strategy,
    middlewareData
  };
};

function expandPaddingObject(padding) {
  return {
    top: 0,
    right: 0,
    bottom: 0,
    left: 0,
    ...padding
  };
}

function getSideObjectFromPadding(padding) {
  return typeof padding !== 'number' ? expandPaddingObject(padding) : {
    top: padding,
    right: padding,
    bottom: padding,
    left: padding
  };
}

function rectToClientRect(rect) {
  return { ...rect,
    top: rect.y,
    left: rect.x,
    right: rect.x + rect.width,
    bottom: rect.y + rect.height
  };
}

/**
 * Resolves with an object of overflow side offsets that determine how much the
 * element is overflowing a given clipping boundary.
 * - positive = overflowing the boundary by that number of pixels
 * - negative = how many pixels left before it will overflow
 * - 0 = lies flush with the boundary
 * @see https://floating-ui.com/docs/detectOverflow
 */
async function detectOverflow(middlewareArguments, options) {
  var _await$platform$isEle;

  if (options === void 0) {
    options = {};
  }

  const {
    x,
    y,
    platform,
    rects,
    elements,
    strategy
  } = middlewareArguments;
  const {
    boundary = 'clippingAncestors',
    rootBoundary = 'viewport',
    elementContext = 'floating',
    altBoundary = false,
    padding = 0
  } = options;
  const paddingObject = getSideObjectFromPadding(padding);
  const altContext = elementContext === 'floating' ? 'reference' : 'floating';
  const element = elements[altBoundary ? altContext : elementContext];
  const clippingClientRect = rectToClientRect(await platform.getClippingRect({
    element: ((_await$platform$isEle = await (platform.isElement == null ? void 0 : platform.isElement(element))) != null ? _await$platform$isEle : true) ? element : element.contextElement || (await (platform.getDocumentElement == null ? void 0 : platform.getDocumentElement(elements.floating))),
    boundary,
    rootBoundary,
    strategy
  }));
  const elementClientRect = rectToClientRect(platform.convertOffsetParentRelativeRectToViewportRelativeRect ? await platform.convertOffsetParentRelativeRectToViewportRelativeRect({
    rect: elementContext === 'floating' ? { ...rects.floating,
      x,
      y
    } : rects.reference,
    offsetParent: await (platform.getOffsetParent == null ? void 0 : platform.getOffsetParent(elements.floating)),
    strategy
  }) : rects[elementContext]); // positive = overflowing the clipping rect
  // 0 or negative = within the clipping rect

  return {
    top: clippingClientRect.top - elementClientRect.top + paddingObject.top,
    bottom: elementClientRect.bottom - clippingClientRect.bottom + paddingObject.bottom,
    left: clippingClientRect.left - elementClientRect.left + paddingObject.left,
    right: elementClientRect.right - clippingClientRect.right + paddingObject.right
  };
}

const min$1 = Math.min;
const max$1 = Math.max;

function within(min$1$1, value, max$1$1) {
  return max$1(min$1$1, min$1(value, max$1$1));
}

const hash$1 = {
  left: 'right',
  right: 'left',
  bottom: 'top',
  top: 'bottom'
};
function getOppositePlacement(placement) {
  return placement.replace(/left|right|bottom|top/g, matched => hash$1[matched]);
}

function getAlignmentSides(placement, rects, rtl) {
  if (rtl === void 0) {
    rtl = false;
  }

  const alignment = getAlignment(placement);
  const mainAxis = getMainAxisFromPlacement(placement);
  const length = getLengthFromAxis(mainAxis);
  let mainAlignmentSide = mainAxis === 'x' ? alignment === (rtl ? 'end' : 'start') ? 'right' : 'left' : alignment === 'start' ? 'bottom' : 'top';

  if (rects.reference[length] > rects.floating[length]) {
    mainAlignmentSide = getOppositePlacement(mainAlignmentSide);
  }

  return {
    main: mainAlignmentSide,
    cross: getOppositePlacement(mainAlignmentSide)
  };
}

const hash = {
  start: 'end',
  end: 'start'
};
function getOppositeAlignmentPlacement(placement) {
  return placement.replace(/start|end/g, matched => hash[matched]);
}

function getExpandedPlacements(placement) {
  const oppositePlacement = getOppositePlacement(placement);
  return [getOppositeAlignmentPlacement(placement), oppositePlacement, getOppositeAlignmentPlacement(oppositePlacement)];
}

/**
 * Changes the placement of the floating element to one that will fit if the
 * initially specified `placement` does not.
 * @see https://floating-ui.com/docs/flip
 */
const flip = function (options) {
  if (options === void 0) {
    options = {};
  }

  return {
    name: 'flip',
    options,

    async fn(middlewareArguments) {
      var _middlewareData$flip;

      const {
        placement,
        middlewareData,
        rects,
        initialPlacement,
        platform,
        elements
      } = middlewareArguments;
      const {
        mainAxis: checkMainAxis = true,
        crossAxis: checkCrossAxis = true,
        fallbackPlacements: specifiedFallbackPlacements,
        fallbackStrategy = 'bestFit',
        flipAlignment = true,
        ...detectOverflowOptions
      } = options;
      const side = getSide(placement);
      const isBasePlacement = side === initialPlacement;
      const fallbackPlacements = specifiedFallbackPlacements || (isBasePlacement || !flipAlignment ? [getOppositePlacement(initialPlacement)] : getExpandedPlacements(initialPlacement));
      const placements = [initialPlacement, ...fallbackPlacements];
      const overflow = await detectOverflow(middlewareArguments, detectOverflowOptions);
      const overflows = [];
      let overflowsData = ((_middlewareData$flip = middlewareData.flip) == null ? void 0 : _middlewareData$flip.overflows) || [];

      if (checkMainAxis) {
        overflows.push(overflow[side]);
      }

      if (checkCrossAxis) {
        const {
          main,
          cross
        } = getAlignmentSides(placement, rects, await (platform.isRTL == null ? void 0 : platform.isRTL(elements.floating)));
        overflows.push(overflow[main], overflow[cross]);
      }

      overflowsData = [...overflowsData, {
        placement,
        overflows
      }]; // One or more sides is overflowing

      if (!overflows.every(side => side <= 0)) {
        var _middlewareData$flip$, _middlewareData$flip2;

        const nextIndex = ((_middlewareData$flip$ = (_middlewareData$flip2 = middlewareData.flip) == null ? void 0 : _middlewareData$flip2.index) != null ? _middlewareData$flip$ : 0) + 1;
        const nextPlacement = placements[nextIndex];

        if (nextPlacement) {
          // Try next placement and re-run the lifecycle
          return {
            data: {
              index: nextIndex,
              overflows: overflowsData
            },
            reset: {
              placement: nextPlacement
            }
          };
        }

        let resetPlacement = 'bottom';

        switch (fallbackStrategy) {
          case 'bestFit':
            {
              var _overflowsData$map$so;

              const placement = (_overflowsData$map$so = overflowsData.map(d => [d, d.overflows.filter(overflow => overflow > 0).reduce((acc, overflow) => acc + overflow, 0)]).sort((a, b) => a[1] - b[1])[0]) == null ? void 0 : _overflowsData$map$so[0].placement;

              if (placement) {
                resetPlacement = placement;
              }

              break;
            }

          case 'initialPlacement':
            resetPlacement = initialPlacement;
            break;
        }

        if (placement !== resetPlacement) {
          return {
            reset: {
              placement: resetPlacement
            }
          };
        }
      }

      return {};
    }

  };
};

async function convertValueToCoords(middlewareArguments, value) {
  const {
    placement,
    platform,
    elements
  } = middlewareArguments;
  const rtl = await (platform.isRTL == null ? void 0 : platform.isRTL(elements.floating));
  const side = getSide(placement);
  const alignment = getAlignment(placement);
  const isVertical = getMainAxisFromPlacement(placement) === 'x';
  const mainAxisMulti = ['left', 'top'].includes(side) ? -1 : 1;
  const crossAxisMulti = rtl && isVertical ? -1 : 1;
  const rawValue = typeof value === 'function' ? value(middlewareArguments) : value; // eslint-disable-next-line prefer-const

  let {
    mainAxis,
    crossAxis,
    alignmentAxis
  } = typeof rawValue === 'number' ? {
    mainAxis: rawValue,
    crossAxis: 0,
    alignmentAxis: null
  } : {
    mainAxis: 0,
    crossAxis: 0,
    alignmentAxis: null,
    ...rawValue
  };

  if (alignment && typeof alignmentAxis === 'number') {
    crossAxis = alignment === 'end' ? alignmentAxis * -1 : alignmentAxis;
  }

  return isVertical ? {
    x: crossAxis * crossAxisMulti,
    y: mainAxis * mainAxisMulti
  } : {
    x: mainAxis * mainAxisMulti,
    y: crossAxis * crossAxisMulti
  };
}
/**
 * Displaces the floating element from its reference element.
 * @see https://floating-ui.com/docs/offset
 */

const offset = function (value) {
  if (value === void 0) {
    value = 0;
  }

  return {
    name: 'offset',
    options: value,

    async fn(middlewareArguments) {
      const {
        x,
        y
      } = middlewareArguments;
      const diffCoords = await convertValueToCoords(middlewareArguments, value);
      return {
        x: x + diffCoords.x,
        y: y + diffCoords.y,
        data: diffCoords
      };
    }

  };
};

function getCrossAxis(axis) {
  return axis === 'x' ? 'y' : 'x';
}

/**
 * Shifts the floating element in order to keep it in view when it will overflow
 * a clipping boundary.
 * @see https://floating-ui.com/docs/shift
 */
const shift = function (options) {
  if (options === void 0) {
    options = {};
  }

  return {
    name: 'shift',
    options,

    async fn(middlewareArguments) {
      const {
        x,
        y,
        placement
      } = middlewareArguments;
      const {
        mainAxis: checkMainAxis = true,
        crossAxis: checkCrossAxis = false,
        limiter = {
          fn: _ref => {
            let {
              x,
              y
            } = _ref;
            return {
              x,
              y
            };
          }
        },
        ...detectOverflowOptions
      } = options;
      const coords = {
        x,
        y
      };
      const overflow = await detectOverflow(middlewareArguments, detectOverflowOptions);
      const mainAxis = getMainAxisFromPlacement(getSide(placement));
      const crossAxis = getCrossAxis(mainAxis);
      let mainAxisCoord = coords[mainAxis];
      let crossAxisCoord = coords[crossAxis];

      if (checkMainAxis) {
        const minSide = mainAxis === 'y' ? 'top' : 'left';
        const maxSide = mainAxis === 'y' ? 'bottom' : 'right';
        const min = mainAxisCoord + overflow[minSide];
        const max = mainAxisCoord - overflow[maxSide];
        mainAxisCoord = within(min, mainAxisCoord, max);
      }

      if (checkCrossAxis) {
        const minSide = crossAxis === 'y' ? 'top' : 'left';
        const maxSide = crossAxis === 'y' ? 'bottom' : 'right';
        const min = crossAxisCoord + overflow[minSide];
        const max = crossAxisCoord - overflow[maxSide];
        crossAxisCoord = within(min, crossAxisCoord, max);
      }

      const limitedCoords = limiter.fn({ ...middlewareArguments,
        [mainAxis]: mainAxisCoord,
        [crossAxis]: crossAxisCoord
      });
      return { ...limitedCoords,
        data: {
          x: limitedCoords.x - x,
          y: limitedCoords.y - y
        }
      };
    }

  };
};

/**
 * Provides data to change the size of the floating element. For instance,
 * prevent it from overflowing its clipping boundary or match the width of the
 * reference element.
 * @see https://floating-ui.com/docs/size
 */
const size = function (options) {
  if (options === void 0) {
    options = {};
  }

  return {
    name: 'size',
    options,

    async fn(middlewareArguments) {
      const {
        placement,
        rects,
        platform,
        elements
      } = middlewareArguments;
      const {
        apply,
        ...detectOverflowOptions
      } = options;
      const overflow = await detectOverflow(middlewareArguments, detectOverflowOptions);
      const side = getSide(placement);
      const alignment = getAlignment(placement);
      let heightSide;
      let widthSide;

      if (side === 'top' || side === 'bottom') {
        heightSide = side;
        widthSide = alignment === ((await (platform.isRTL == null ? void 0 : platform.isRTL(elements.floating))) ? 'start' : 'end') ? 'left' : 'right';
      } else {
        widthSide = side;
        heightSide = alignment === 'end' ? 'top' : 'bottom';
      }

      const xMin = max$1(overflow.left, 0);
      const xMax = max$1(overflow.right, 0);
      const yMin = max$1(overflow.top, 0);
      const yMax = max$1(overflow.bottom, 0);
      const dimensions = {
        availableHeight: rects.floating.height - (['left', 'right'].includes(placement) ? 2 * (yMin !== 0 || yMax !== 0 ? yMin + yMax : max$1(overflow.top, overflow.bottom)) : overflow[heightSide]),
        availableWidth: rects.floating.width - (['top', 'bottom'].includes(placement) ? 2 * (xMin !== 0 || xMax !== 0 ? xMin + xMax : max$1(overflow.left, overflow.right)) : overflow[widthSide])
      };
      const prevDimensions = await platform.getDimensions(elements.floating);
      apply == null ? void 0 : apply({ ...middlewareArguments,
        ...dimensions
      });
      const nextDimensions = await platform.getDimensions(elements.floating);

      if (prevDimensions.width !== nextDimensions.width || prevDimensions.height !== nextDimensions.height) {
        return {
          reset: {
            rects: true
          }
        };
      }

      return {};
    }

  };
};

function isWindow(value) {
  return value && value.document && value.location && value.alert && value.setInterval;
}
function getWindow(node) {
  if (node == null) {
    return window;
  }

  if (!isWindow(node)) {
    const ownerDocument = node.ownerDocument;
    return ownerDocument ? ownerDocument.defaultView || window : window;
  }

  return node;
}

function getComputedStyle$1(element) {
  return getWindow(element).getComputedStyle(element);
}

function getNodeName(node) {
  return isWindow(node) ? '' : node ? (node.nodeName || '').toLowerCase() : '';
}

function getUAString() {
  const uaData = navigator.userAgentData;

  if (uaData != null && uaData.brands) {
    return uaData.brands.map(item => item.brand + "/" + item.version).join(' ');
  }

  return navigator.userAgent;
}

function isHTMLElement(value) {
  return value instanceof getWindow(value).HTMLElement;
}
function isElement(value) {
  return value instanceof getWindow(value).Element;
}
function isNode(value) {
  return value instanceof getWindow(value).Node;
}
function isShadowRoot(node) {
  // Browsers without `ShadowRoot` support
  if (typeof ShadowRoot === 'undefined') {
    return false;
  }

  const OwnElement = getWindow(node).ShadowRoot;
  return node instanceof OwnElement || node instanceof ShadowRoot;
}
function isOverflowElement(element) {
  // Firefox wants us to check `-x` and `-y` variations as well
  const {
    overflow,
    overflowX,
    overflowY
  } = getComputedStyle$1(element);
  return /auto|scroll|overlay|hidden/.test(overflow + overflowY + overflowX);
}
function isTableElement(element) {
  return ['table', 'td', 'th'].includes(getNodeName(element));
}
function isContainingBlock(element) {
  // TODO: Try and use feature detection here instead
  const isFirefox = /firefox/i.test(getUAString());
  const css = getComputedStyle$1(element); // This is non-exhaustive but covers the most common CSS properties that
  // create a containing block.
  // https://developer.mozilla.org/en-US/docs/Web/CSS/Containing_block#identifying_the_containing_block

  return css.transform !== 'none' || css.perspective !== 'none' || // @ts-ignore (TS 4.1 compat)
  css.contain === 'paint' || ['transform', 'perspective'].includes(css.willChange) || isFirefox && css.willChange === 'filter' || isFirefox && (css.filter ? css.filter !== 'none' : false);
}
function isLayoutViewport() {
  // Not Safari
  return !/^((?!chrome|android).)*safari/i.test(getUAString()); // Feature detection for this fails in various ways
  // • Always-visible scrollbar or not
  // • Width of <html>, etc.
  // const vV = win.visualViewport;
  // return vV ? Math.abs(win.innerWidth / vV.scale - vV.width) < 0.5 : true;
}

const min = Math.min;
const max = Math.max;
const round = Math.round;

function getBoundingClientRect(element, includeScale, isFixedStrategy) {
  var _win$visualViewport$o, _win$visualViewport, _win$visualViewport$o2, _win$visualViewport2;

  if (includeScale === void 0) {
    includeScale = false;
  }

  if (isFixedStrategy === void 0) {
    isFixedStrategy = false;
  }

  const clientRect = element.getBoundingClientRect();
  let scaleX = 1;
  let scaleY = 1;

  if (includeScale && isHTMLElement(element)) {
    scaleX = element.offsetWidth > 0 ? round(clientRect.width) / element.offsetWidth || 1 : 1;
    scaleY = element.offsetHeight > 0 ? round(clientRect.height) / element.offsetHeight || 1 : 1;
  }

  const win = isElement(element) ? getWindow(element) : window;
  const addVisualOffsets = !isLayoutViewport() && isFixedStrategy;
  const x = (clientRect.left + (addVisualOffsets ? (_win$visualViewport$o = (_win$visualViewport = win.visualViewport) == null ? void 0 : _win$visualViewport.offsetLeft) != null ? _win$visualViewport$o : 0 : 0)) / scaleX;
  const y = (clientRect.top + (addVisualOffsets ? (_win$visualViewport$o2 = (_win$visualViewport2 = win.visualViewport) == null ? void 0 : _win$visualViewport2.offsetTop) != null ? _win$visualViewport$o2 : 0 : 0)) / scaleY;
  const width = clientRect.width / scaleX;
  const height = clientRect.height / scaleY;
  return {
    width,
    height,
    top: y,
    right: x + width,
    bottom: y + height,
    left: x,
    x,
    y
  };
}

function getDocumentElement(node) {
  return ((isNode(node) ? node.ownerDocument : node.document) || window.document).documentElement;
}

function getNodeScroll(element) {
  if (isElement(element)) {
    return {
      scrollLeft: element.scrollLeft,
      scrollTop: element.scrollTop
    };
  }

  return {
    scrollLeft: element.pageXOffset,
    scrollTop: element.pageYOffset
  };
}

function getWindowScrollBarX(element) {
  // If <html> has a CSS width greater than the viewport, then this will be
  // incorrect for RTL.
  return getBoundingClientRect(getDocumentElement(element)).left + getNodeScroll(element).scrollLeft;
}

function isScaled(element) {
  const rect = getBoundingClientRect(element);
  return round(rect.width) !== element.offsetWidth || round(rect.height) !== element.offsetHeight;
}

function getRectRelativeToOffsetParent(element, offsetParent, strategy) {
  const isOffsetParentAnElement = isHTMLElement(offsetParent);
  const documentElement = getDocumentElement(offsetParent);
  const rect = getBoundingClientRect(element, // @ts-ignore - checked above (TS 4.1 compat)
  isOffsetParentAnElement && isScaled(offsetParent), strategy === 'fixed');
  let scroll = {
    scrollLeft: 0,
    scrollTop: 0
  };
  const offsets = {
    x: 0,
    y: 0
  };

  if (isOffsetParentAnElement || !isOffsetParentAnElement && strategy !== 'fixed') {
    if (getNodeName(offsetParent) !== 'body' || isOverflowElement(documentElement)) {
      scroll = getNodeScroll(offsetParent);
    }

    if (isHTMLElement(offsetParent)) {
      const offsetRect = getBoundingClientRect(offsetParent, true);
      offsets.x = offsetRect.x + offsetParent.clientLeft;
      offsets.y = offsetRect.y + offsetParent.clientTop;
    } else if (documentElement) {
      offsets.x = getWindowScrollBarX(documentElement);
    }
  }

  return {
    x: rect.left + scroll.scrollLeft - offsets.x,
    y: rect.top + scroll.scrollTop - offsets.y,
    width: rect.width,
    height: rect.height
  };
}

function getParentNode(node) {
  if (getNodeName(node) === 'html') {
    return node;
  }

  return (// this is a quicker (but less type safe) way to save quite some bytes from the bundle
    // @ts-ignore
    node.assignedSlot || // step into the shadow DOM of the parent of a slotted node
    node.parentNode || ( // DOM Element detected
    isShadowRoot(node) ? node.host : null) || // ShadowRoot detected
    getDocumentElement(node) // fallback

  );
}

function getTrueOffsetParent(element) {
  if (!isHTMLElement(element) || getComputedStyle(element).position === 'fixed') {
    return null;
  }

  return element.offsetParent;
}

function getContainingBlock(element) {
  let currentNode = getParentNode(element);

  if (isShadowRoot(currentNode)) {
    currentNode = currentNode.host;
  }

  while (isHTMLElement(currentNode) && !['html', 'body'].includes(getNodeName(currentNode))) {
    if (isContainingBlock(currentNode)) {
      return currentNode;
    } else {
      currentNode = currentNode.parentNode;
    }
  }

  return null;
} // Gets the closest ancestor positioned element. Handles some edge cases,
// such as table ancestors and cross browser bugs.


function getOffsetParent(element) {
  const window = getWindow(element);
  let offsetParent = getTrueOffsetParent(element);

  while (offsetParent && isTableElement(offsetParent) && getComputedStyle(offsetParent).position === 'static') {
    offsetParent = getTrueOffsetParent(offsetParent);
  }

  if (offsetParent && (getNodeName(offsetParent) === 'html' || getNodeName(offsetParent) === 'body' && getComputedStyle(offsetParent).position === 'static' && !isContainingBlock(offsetParent))) {
    return window;
  }

  return offsetParent || getContainingBlock(element) || window;
}

function getDimensions(element) {
  if (isHTMLElement(element)) {
    return {
      width: element.offsetWidth,
      height: element.offsetHeight
    };
  }

  const rect = getBoundingClientRect(element);
  return {
    width: rect.width,
    height: rect.height
  };
}

function convertOffsetParentRelativeRectToViewportRelativeRect(_ref) {
  let {
    rect,
    offsetParent,
    strategy
  } = _ref;
  const isOffsetParentAnElement = isHTMLElement(offsetParent);
  const documentElement = getDocumentElement(offsetParent);

  if (offsetParent === documentElement) {
    return rect;
  }

  let scroll = {
    scrollLeft: 0,
    scrollTop: 0
  };
  const offsets = {
    x: 0,
    y: 0
  };

  if (isOffsetParentAnElement || !isOffsetParentAnElement && strategy !== 'fixed') {
    if (getNodeName(offsetParent) !== 'body' || isOverflowElement(documentElement)) {
      scroll = getNodeScroll(offsetParent);
    }

    if (isHTMLElement(offsetParent)) {
      const offsetRect = getBoundingClientRect(offsetParent, true);
      offsets.x = offsetRect.x + offsetParent.clientLeft;
      offsets.y = offsetRect.y + offsetParent.clientTop;
    } // This doesn't appear to be need to be negated.
    // else if (documentElement) {
    //   offsets.x = getWindowScrollBarX(documentElement);
    // }

  }

  return { ...rect,
    x: rect.x - scroll.scrollLeft + offsets.x,
    y: rect.y - scroll.scrollTop + offsets.y
  };
}

function getViewportRect(element, strategy) {
  const win = getWindow(element);
  const html = getDocumentElement(element);
  const visualViewport = win.visualViewport;
  let width = html.clientWidth;
  let height = html.clientHeight;
  let x = 0;
  let y = 0;

  if (visualViewport) {
    width = visualViewport.width;
    height = visualViewport.height;
    const layoutViewport = isLayoutViewport();

    if (layoutViewport || !layoutViewport && strategy === 'fixed') {
      x = visualViewport.offsetLeft;
      y = visualViewport.offsetTop;
    }
  }

  return {
    width,
    height,
    x,
    y
  };
}

// of the `<html>` and `<body>` rect bounds if horizontally scrollable

function getDocumentRect(element) {
  var _element$ownerDocumen;

  const html = getDocumentElement(element);
  const scroll = getNodeScroll(element);
  const body = (_element$ownerDocumen = element.ownerDocument) == null ? void 0 : _element$ownerDocumen.body;
  const width = max(html.scrollWidth, html.clientWidth, body ? body.scrollWidth : 0, body ? body.clientWidth : 0);
  const height = max(html.scrollHeight, html.clientHeight, body ? body.scrollHeight : 0, body ? body.clientHeight : 0);
  let x = -scroll.scrollLeft + getWindowScrollBarX(element);
  const y = -scroll.scrollTop;

  if (getComputedStyle$1(body || html).direction === 'rtl') {
    x += max(html.clientWidth, body ? body.clientWidth : 0) - width;
  }

  return {
    width,
    height,
    x,
    y
  };
}

function getNearestOverflowAncestor(node) {
  const parentNode = getParentNode(node);

  if (['html', 'body', '#document'].includes(getNodeName(parentNode))) {
    // @ts-ignore assume body is always available
    return node.ownerDocument.body;
  }

  if (isHTMLElement(parentNode) && isOverflowElement(parentNode)) {
    return parentNode;
  }

  return getNearestOverflowAncestor(parentNode);
}

function getOverflowAncestors(node, list) {
  var _node$ownerDocument;

  if (list === void 0) {
    list = [];
  }

  const scrollableAncestor = getNearestOverflowAncestor(node);
  const isBody = scrollableAncestor === ((_node$ownerDocument = node.ownerDocument) == null ? void 0 : _node$ownerDocument.body);
  const win = getWindow(scrollableAncestor);
  const target = isBody ? [win].concat(win.visualViewport || [], isOverflowElement(scrollableAncestor) ? scrollableAncestor : []) : scrollableAncestor;
  const updatedList = list.concat(target);
  return isBody ? updatedList : // @ts-ignore: isBody tells us target will be an HTMLElement here
  updatedList.concat(getOverflowAncestors(target));
}

function contains(parent, child) {
  const rootNode = child == null ? void 0 : child.getRootNode == null ? void 0 : child.getRootNode(); // First, attempt with faster native method

  if (parent != null && parent.contains(child)) {
    return true;
  } // then fallback to custom implementation with Shadow DOM support
  else if (rootNode && isShadowRoot(rootNode)) {
    let next = child;

    do {
      // use `===` replace node.isSameNode()
      if (next && parent === next) {
        return true;
      } // @ts-ignore: need a better way to handle this...


      next = next.parentNode || next.host;
    } while (next);
  }

  return false;
}

function getInnerBoundingClientRect(element, strategy) {
  const clientRect = getBoundingClientRect(element, false, strategy === 'fixed');
  const top = clientRect.top + element.clientTop;
  const left = clientRect.left + element.clientLeft;
  return {
    top,
    left,
    x: left,
    y: top,
    right: left + element.clientWidth,
    bottom: top + element.clientHeight,
    width: element.clientWidth,
    height: element.clientHeight
  };
}

function getClientRectFromClippingAncestor(element, clippingParent, strategy) {
  if (clippingParent === 'viewport') {
    return rectToClientRect(getViewportRect(element, strategy));
  }

  if (isElement(clippingParent)) {
    return getInnerBoundingClientRect(clippingParent, strategy);
  }

  return rectToClientRect(getDocumentRect(getDocumentElement(element)));
} // A "clipping ancestor" is an overflowable container with the characteristic of
// clipping (or hiding) overflowing elements with a position different from
// `initial`


function getClippingAncestors(element) {
  const clippingAncestors = getOverflowAncestors(element);
  const canEscapeClipping = ['absolute', 'fixed'].includes(getComputedStyle$1(element).position);
  const clipperElement = canEscapeClipping && isHTMLElement(element) ? getOffsetParent(element) : element;

  if (!isElement(clipperElement)) {
    return [];
  } // @ts-ignore isElement check ensures we return Array<Element>


  return clippingAncestors.filter(clippingAncestors => isElement(clippingAncestors) && contains(clippingAncestors, clipperElement) && getNodeName(clippingAncestors) !== 'body');
} // Gets the maximum area that the element is visible in due to any number of
// clipping ancestors


function getClippingRect(_ref) {
  let {
    element,
    boundary,
    rootBoundary,
    strategy
  } = _ref;
  const mainClippingAncestors = boundary === 'clippingAncestors' ? getClippingAncestors(element) : [].concat(boundary);
  const clippingAncestors = [...mainClippingAncestors, rootBoundary];
  const firstClippingAncestor = clippingAncestors[0];
  const clippingRect = clippingAncestors.reduce((accRect, clippingAncestor) => {
    const rect = getClientRectFromClippingAncestor(element, clippingAncestor, strategy);
    accRect.top = max(rect.top, accRect.top);
    accRect.right = min(rect.right, accRect.right);
    accRect.bottom = min(rect.bottom, accRect.bottom);
    accRect.left = max(rect.left, accRect.left);
    return accRect;
  }, getClientRectFromClippingAncestor(element, firstClippingAncestor, strategy));
  return {
    width: clippingRect.right - clippingRect.left,
    height: clippingRect.bottom - clippingRect.top,
    x: clippingRect.left,
    y: clippingRect.top
  };
}

const platform = {
  getClippingRect,
  convertOffsetParentRelativeRectToViewportRelativeRect,
  isElement,
  getDimensions,
  getOffsetParent,
  getDocumentElement,
  getElementRects: _ref => {
    let {
      reference,
      floating,
      strategy
    } = _ref;
    return {
      reference: getRectRelativeToOffsetParent(reference, getOffsetParent(floating), strategy),
      floating: { ...getDimensions(floating),
        x: 0,
        y: 0
      }
    };
  },
  getClientRects: element => Array.from(element.getClientRects()),
  isRTL: element => getComputedStyle$1(element).direction === 'rtl'
};

/**
 * Automatically updates the position of the floating element when necessary.
 * @see https://floating-ui.com/docs/autoUpdate
 */
function autoUpdate(reference, floating, update, options) {
  if (options === void 0) {
    options = {};
  }

  const {
    ancestorScroll: _ancestorScroll = true,
    ancestorResize: _ancestorResize = true,
    elementResize = true,
    animationFrame = false
  } = options;
  let cleanedUp = false;
  const ancestorScroll = _ancestorScroll && !animationFrame;
  const ancestorResize = _ancestorResize && !animationFrame;
  const ancestors = ancestorScroll || ancestorResize ? [...(isElement(reference) ? getOverflowAncestors(reference) : []), ...getOverflowAncestors(floating)] : [];
  ancestors.forEach(ancestor => {
    ancestorScroll && ancestor.addEventListener('scroll', update, {
      passive: true
    });
    ancestorResize && ancestor.addEventListener('resize', update);
  });
  let observer = null;

  if (elementResize) {
    observer = new ResizeObserver(update);
    isElement(reference) && !animationFrame && observer.observe(reference);
    observer.observe(floating);
  }

  let frameId;
  let prevRefRect = animationFrame ? getBoundingClientRect(reference) : null;

  if (animationFrame) {
    frameLoop();
  }

  function frameLoop() {
    if (cleanedUp) {
      return;
    }

    const nextRefRect = getBoundingClientRect(reference);

    if (prevRefRect && (nextRefRect.x !== prevRefRect.x || nextRefRect.y !== prevRefRect.y || nextRefRect.width !== prevRefRect.width || nextRefRect.height !== prevRefRect.height)) {
      update();
    }

    prevRefRect = nextRefRect;
    frameId = requestAnimationFrame(frameLoop);
  }

  return () => {
    var _observer;

    cleanedUp = true;
    ancestors.forEach(ancestor => {
      ancestorScroll && ancestor.removeEventListener('scroll', update);
      ancestorResize && ancestor.removeEventListener('resize', update);
    });
    (_observer = observer) == null ? void 0 : _observer.disconnect();
    observer = null;

    if (animationFrame) {
      cancelAnimationFrame(frameId);
    }
  };
}

/**
 * Computes the `x` and `y` coordinates that will place the floating element
 * next to a reference element when it is given a certain CSS positioning
 * strategy.
 */

const computePosition = (reference, floating, options) => computePosition$1(reference, floating, {
  platform,
  ...options
});

const dropdownCss = ":host{display:inline-block;--panel-height:75vh;--panel-width:11rem}.dropdown{position:relative}.dropdown.dropdown--open .dropdown__positioner{visibility:visible;opacity:1;transform:scale(1)}.dropdown__trigger{display:block;cursor:pointer}.dropdown--disabled,.dropdown--disabled .dropdown__trigger{cursor:not-allowed}.dropdown__positioner{position:absolute;right:0;width:100%;z-index:var(--sc-z-index-dropdown);opacity:0;visibility:hidden;transform:scale(0.9);min-width:var(--panel-width)}.dropdown__panel{transform-origin:top left;box-shadow:0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);max-height:var(--panel-height);font-family:var(--sc-font-sans);font-size:var(--sc-font-size-medium);font-weight:var(--sc-font-weight-normal);color:var(--color);background-color:var(--sc-panel-background-color);border:solid 1px var(--sc-panel-border-color);border-radius:var(--sc-border-radius-medium);box-shadow:var(--sc-shadow-large);overflow:auto;overscroll-behavior:none;transition:var(--sc-transition-fast) opacity, var(--sc-transition-fast) transform;z-index:5}";

const ScDropdown = /*@__PURE__*/ proxyCustomElement(class extends HTMLElement {
  constructor() {
    super();
    this.__registerHost();
    this.__attachShadow();
    this.scShow = createEvent(this, "scShow", 7);
    this.scHide = createEvent(this, "scHide", 7);
    /** Indicates whether or not the dropdown is open. You can use this in lieu of the show/hide methods. */
    this.open = false;
    /** The placement of the dropdown. */
    this.placement = 'bottom-start';
    /** The distance in pixels from which to offset the panel away from its trigger. */
    this.distance = 10;
    /** The distance in pixels from which to offset the panel along its trigger. */
    this.skidding = 0;
    /**
     * Enable this option to prevent the panel from being clipped when the component is placed inside a container with
     * `overflow: auto|scroll`.
     */
    this.hoist = false;
    /** Determines whether the dropdown should hide when a menu item is selected */
    this.closeOnSelect = true;
  }
  handleOpenChange() {
    this.open ? this.show() : this.hide();
  }
  handleOutsideClick(evt) {
    const path = evt.composedPath();
    if (!path.some(item => {
      return item === this.el;
    })) {
      this.open = false;
    }
  }
  startPositioner() {
    this.stopPositioner();
    this.updatePositioner();
    this.positionerCleanup = autoUpdate(this.trigger, this.positioner, this.updatePositioner.bind(this));
  }
  updatePositioner() {
    if (!this.open || !this.trigger || !this.positioner) {
      return;
    }
    computePosition(this.trigger, this.positioner, {
      placement: this.placement,
      middleware: [
        offset({ mainAxis: this.distance, crossAxis: this.skidding }),
        flip(),
        shift(),
        size({
          apply: ({ availableWidth: width, availableHeight: height }) => {
            // Ensure the panel stays within the viewport when we have lots of menu items
            Object.assign(this.panel.style, {
              maxWidth: `${width}px`,
              maxHeight: `${height}px`,
            });
          },
          padding: 8,
        }),
      ],
      strategy: this.hoist ? 'fixed' : 'absolute',
    }).then(({ x, y, placement }) => {
      this.positioner.setAttribute('data-placement', placement);
      Object.assign(this.positioner.style, {
        position: this.hoist ? 'fixed' : 'absolute',
        left: `${x}px`,
        top: `${y}px`,
        right: 'auto',
      });
    });
  }
  stopPositioner() {
    if (this.positionerCleanup) {
      this.positionerCleanup();
      this.positionerCleanup = undefined;
      this.positioner.removeAttribute('data-placement');
    }
  }
  show() {
    this.scShow.emit();
    // Prevent subsequent calls to the method, whether manually or triggered by the `open` watcher
    if (this.isVisible) {
      return;
    }
    this.isVisible = true;
    this.open = true;
    this.startPositioner();
    this.panel.focus();
  }
  hide() {
    this.scHide.emit();
    // Prevent subsequent calls to the method, whether manually or triggered by the `open` watcher
    if (!this.isVisible) {
      return;
    }
    this.stopPositioner();
    this.isVisible = false;
    this.open = false;
  }
  handleClick(e) {
    if (this.closeOnSelect) {
      const path = e.composedPath();
      if (path.some(item => {
        return item.classList && item.classList.contains('menu-item');
      })) {
        this.open = false;
      }
    }
  }
  componentWillLoad() {
    document.addEventListener('mousedown', evt => this.handleOutsideClick(evt));
  }
  /* Get the slotted menu */
  getMenu() {
    let slotted = this.el.shadowRoot.querySelector('slot');
    return slotted.assignedNodes().find(node => {
      return node.nodeName === 'sc-menu';
    });
  }
  render() {
    return (h("div", { part: "base", class: {
        'dropdown': true,
        'dropdown--open': this.open,
        'dropdown--disabled': this.disabled,
      } }, h("span", { part: "trigger", class: "dropdown__trigger", ref: el => (this.trigger = el), onClick: () => {
        if (this.disabled)
          return;
        if (this.open) {
          this.hide();
        }
        else {
          setTimeout(() => {
            this.show();
          }, 0);
        }
      }, "aria-expanded": "true", "aria-haspopup": "true" }, h("slot", { name: "trigger" })), h("div", { class: "dropdown__positioner", ref: el => (this.positioner = el) }, h("div", { part: "panel", class: {
        'dropdown__panel': true,
        'position--top-left': this.position === 'top-left',
        'position--top-right': this.position === 'top-right',
        'position--bottom-left': this.position === 'bottom-left',
        'position--bottom-right': this.position === 'bottom-right',
      }, role: "menu", "aria-orientation": "vertical", "aria-labelledby": "menu-button", tabindex: "-1", onClick: e => this.handleClick(e), ref: el => (this.panel = el) }, h("slot", null)))));
  }
  get el() { return this; }
  static get watchers() { return {
    "open": ["handleOpenChange"]
  }; }
  static get style() { return dropdownCss; }
}, [1, "sc-dropdown", {
    "clickEl": [16],
    "disabled": [4],
    "open": [1540],
    "position": [1],
    "placement": [513],
    "distance": [2],
    "skidding": [2],
    "hoist": [4],
    "closeOnSelect": [516, "close-on-select"],
    "isVisible": [32]
  }]);
function defineCustomElement() {
  if (typeof customElements === "undefined") {
    return;
  }
  const components = ["sc-dropdown"];
  components.forEach(tagName => { switch (tagName) {
    case "sc-dropdown":
      if (!customElements.get(tagName)) {
        customElements.define(tagName, ScDropdown);
      }
      break;
  } });
}
defineCustomElement();

export { ScDropdown as S, defineCustomElement as d };
