import React, { PropTypes } from 'react';
import Select from 'react-select';
import 'react-select/dist/react-select.css';

RFReactSelect.defaultProps = {
  multi: false
};

RFReactSelect.propTypes = {
  input: PropTypes.shape({
    name: PropTypes.string.isRequired,
    value: PropTypes.string.isRequired,
    onBlur: PropTypes.func.isRequired,
    onFocus: PropTypes.func.isRequired,
  }).isRequired,
  options: PropTypes.array.isRequired,
  multi: PropTypes.bool
};

export default function RFReactSelect({ input: { name, value, onBlur, onChange, onFocus }, options, multi }) {
  const transformedValue = transformValue(value, options, multi);
  return (
    <Select
      valueKey="value"
      name={name}
      value={transformedValue}
      multi={multi}
      options={options}
      onChange={multi
        ? multiChangeHandler(onChange)
        : singleChangeHandler(onChange)
      }
      onBlur={() => onBlur(value)}
      onFocus={onFocus}
    />
  );
}

function singleChangeHandler(func) {
  return function handleSingleChange(value) {
    func(value ? value.value : '');
  };
}

function multiChangeHandler(func) {
  return function handleMultiHandler(values) {
    func(values.map(value => value.value));
  };
}

function transformValue(value, options, multi) {
  if (multi && typeof value === 'string') return [];

  const filteredOptions = options.filter(option => {
    return multi
      ? value.indexOf(option.value) !== -1
      : option.value === value;
  });

  return multi ? filteredOptions : filteredOptions[0];
}