import { parentAutofocusables } from './DOMutils';
import { contains } from './DOMutils';
import { asArray } from './array';
var getParents = function (node, parents) {
    if (parents === void 0) { parents = []; }
    parents.push(node);
    if (node.parentNode) {
        getParents(node.parentNode.host || node.parentNode, parents);
    }
    return parents;
};
/**
 * finds a parent for both nodeA and nodeB
 * @param nodeA
 * @param nodeB
 * @returns {boolean|*}
 */
export var getCommonParent = function (nodeA, nodeB) {
    var parentsA = getParents(nodeA);
    var parentsB = getParents(nodeB);
    // tslint:disable-next-line:prefer-for-of
    for (var i = 0; i < parentsA.length; i += 1) {
        var currentParent = parentsA[i];
        if (parentsB.indexOf(currentParent) >= 0) {
            return currentParent;
        }
    }
    return false;
};
export var getTopCommonParent = function (baseActiveElement, leftEntry, rightEntries) {
    var activeElements = asArray(baseActiveElement);
    var leftEntries = asArray(leftEntry);
    var activeElement = activeElements[0];
    var topCommon = false;
    leftEntries.filter(Boolean).forEach(function (entry) {
        topCommon = getCommonParent(topCommon || entry, entry) || topCommon;
        rightEntries.filter(Boolean).forEach(function (subEntry) {
            var common = getCommonParent(activeElement, subEntry);
            if (common) {
                if (!topCommon || contains(common, topCommon)) {
                    topCommon = common;
                }
                else {
                    topCommon = getCommonParent(common, topCommon);
                }
            }
        });
    });
    // TODO: add assert here?
    return topCommon;
};
/**
 * return list of nodes which are expected to be autofocused inside a given top nodes
 * @param entries
 * @param visibilityCache
 */
export var allParentAutofocusables = function (entries, visibilityCache) {
    return entries.reduce(function (acc, node) { return acc.concat(parentAutofocusables(node, visibilityCache)); }, []);
};