import toGrid from './to-grid';
import findUp from '../dom/find-up';
import { memoize } from '../../core/utils';

/**
 * Get the x, y coordinates of a table cell; normalized for rowspan and colspan
 * @method getCellPosition
 * @memberof axe.commons.table
 * @instance
 * @param  {HTMLTableCellElement} cell The table cell of which to get the position
 * @return {Object} Object with `x` and `y` properties of the coordinates
 */
function getCellPosition(cell, tableGrid) {
  var rowIndex, index;
  if (!tableGrid) {
    tableGrid = toGrid(findUp(cell, 'table'));
  }

  for (rowIndex = 0; rowIndex < tableGrid.length; rowIndex++) {
    if (tableGrid[rowIndex]) {
      index = tableGrid[rowIndex].indexOf(cell);
      if (index !== -1) {
        return {
          x: index,
          y: rowIndex
        };
      }
    }
  }
}

export default memoize(getCellPosition);