export function getElementRect (element: HTMLElement) {
  const clientRect = getElementClientRect(element);

  if (!isiOS7() && clientRect) {
    const scroll = getScrollXY(getWindow(element));

    clientRect.left   += scroll.x;
    clientRect.right  += scroll.x;
    clientRect.top    += scroll.y;
    clientRect.bottom += scroll.y;
  }

  return clientRect;
}

export function getElementClientRect (element: HTMLElement) {
  // @ts-ignore
  const clientRect = (element instanceof window.SVGElement
    ? element.getBoundingClientRect()
    : element.getClientRects()[0]);

  return clientRect && {
    left  : clientRect.left,
    right : clientRect.right,
    top   : clientRect.top,
    bottom: clientRect.bottom,
    width : clientRect.width  || clientRect.right  - clientRect.left,
    height: clientRect.height || clientRect.bottom - clientRect.top,
  };
}


export function getWindow (node: Node) {
  if (isWindow(node)) {
    return node;
  }

  const rootNode = (node.ownerDocument || node);

  // @ts-ignore
  return rootNode.defaultView || window;
}

// @ts-ignore
export const isWindow = (thing: Node) => !!(thing && thing.Window) && (thing instanceof thing.Window);

export function getScrollXY (relevantWindow: Window) {
  relevantWindow = relevantWindow || window;
  return {
    x: relevantWindow.scrollX || relevantWindow.document.documentElement.scrollLeft,
    y: relevantWindow.scrollY || relevantWindow.document.documentElement.scrollTop,
  };
}

export const isiOS7 = (): boolean => {
  return (/iP(hone|od|ad)/.test(navigator.platform)
    && /OS 7[^\d]/.test(navigator.appVersion));
}

export const openLink = (link: string, inNewTab?: boolean) => {
  Object.assign(document.createElement("a"), { ...inNewTab && { target: "_blank" }, href: link }).click();
};