/**
 * Take the pressed key array and return the readable string for the keys
 *
 * @param {Array} [keys=[]]
 * @returns {string} string representation of an array of keys
 */
const formatKeysForInput = (keys = []) => keys.join('+');

/**
 * formats given keys sequence to insert the modifier keys in the first index of the array
 * @param {string} sequence keys sequence from MouseTrap Record -> "shift+left"
 * @returns {Array} keys in array-format -> ['shift','left']
 */
const getKeys = ({ sequence, modifierKeys }) => {
  const keysArray = sequence.join(' ').split('+');
  let keys = [];
  let modifiers = [];
  keysArray.forEach(key => {
    if (modifierKeys && modifierKeys.includes(key)) {
      modifiers.push(key);
    } else {
      keys.push(key);
    }
  });
  return [...modifiers, ...keys];
};

export {
  getKeys,
  formatKeysForInput
};