function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _iterableToArrayLimit(arr, i) { var _i = null == arr ? null : "undefined" != typeof Symbol && arr[Symbol.iterator] || arr["@@iterator"]; if (null != _i) { var _s, _e, _x, _r, _arr = [], _n = !0, _d = !1; try { if (_x = (_i = _i.call(arr)).next, 0 === i) { if (Object(_i) !== _i) return; _n = !1; } else for (; !(_n = (_s = _x.call(_i)).done) && (_arr.push(_s.value), _arr.length !== i); _n = !0); } catch (err) { _d = !0, _e = err; } finally { try { if (!_n && null != _i["return"] && (_r = _i["return"](), Object(_r) !== _r)) return; } finally { if (_d) throw _e; } } return _arr; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
import React from 'react';
export var useGridNavigation = function useGridNavigation(_ref) {
  var initialIndicesRows = _ref.indicesRows;
  var _React$useState = React.useState(0),
    _React$useState2 = _slicedToArray(_React$useState, 2),
    index = _React$useState2[0],
    setIndex = _React$useState2[1];
  var _React$useState3 = React.useState(initialIndicesRows),
    _React$useState4 = _slicedToArray(_React$useState3, 2),
    indicesRows = _React$useState4[0],
    setIndicesRows = _React$useState4[1];
  var _React$useState5 = React.useState(0),
    _React$useState6 = _slicedToArray(_React$useState5, 2),
    gridSize = _React$useState6[0],
    setGridSize = _React$useState6[1];
  React.useEffect(function () {
    setGridSize(indicesRows.flat().length);
  }, [indicesRows]);
  React.useEffect(function () {
    setIndex(function (prev) {
      return prev < gridSize ? prev : 0;
    });
  }, [gridSize]);
  var finalIndex = gridSize - 1;
  var up = function up(e) {
    e.preventDefault();
    var getNextIndex = function getNextIndex() {
      var rowIndex = indicesRows.findIndex(function (rowCells) {
        return rowCells.includes(index);
      });
      var nextRowIndex = rowIndex - 1;
      if (nextRowIndex < 0) {
        return indicesRows[rowIndex][0];
      }
      var nextRow = indicesRows[nextRowIndex];
      var nextCellIndex = indicesRows[rowIndex].findIndex(function (navigationIndex) {
        return navigationIndex === index;
      });
      var nextNavigationIndex = nextRow[nextCellIndex];
      return nextNavigationIndex !== null && nextNavigationIndex !== void 0 ? nextNavigationIndex : nextRow[nextRow.length - 1];
    };
    var nextIndex = getNextIndex();
    setIndex(nextIndex);
    return nextIndex;
  };
  var down = function down(e) {
    e.preventDefault();
    var getNextIndex = function getNextIndex() {
      var rowIndex = indicesRows.findIndex(function (rowCells) {
        return rowCells.includes(index);
      });
      var nextRowIndex = rowIndex + 1;
      var finalRowIndex = indicesRows.length - 1;
      if (nextRowIndex > finalRowIndex) {
        var row = indicesRows[rowIndex];
        return row[row.length - 1];
      }
      var nextRow = indicesRows[nextRowIndex];
      var nextCellIndex = indicesRows[rowIndex].findIndex(function (navigationIndex) {
        return navigationIndex === index;
      });
      var nextNavigationIndex = nextRow[nextCellIndex];
      return nextNavigationIndex !== null && nextNavigationIndex !== void 0 ? nextNavigationIndex : nextRow[nextRow.length - 1];
    };
    var nextIndex = getNextIndex();
    setIndex(nextIndex);
    return nextIndex;
  };
  var right = function right(e) {
    if (index === finalIndex) {
      return index;
    }
    e.preventDefault();
    var nextIndex = index + 1;
    if (nextIndex <= finalIndex) {
      setIndex(nextIndex);
    }
    return nextIndex;
  };
  var left = function left(e) {
    if (index === 0) {
      return index;
    }
    e.preventDefault();
    var nextIndex = index - 1;
    if (nextIndex >= 0) {
      setIndex(nextIndex);
    }
    return nextIndex;
  };
  return {
    index: index,
    setIndex: setIndex,
    setIndicesRows: setIndicesRows,
    up: up,
    down: down,
    left: left,
    right: right
  };
};
//# sourceMappingURL=ThumbnailGrid.hooks.js.map