// @flow
import React, { PureComponent } from 'react'
import { prop } from 'ramda'
import Box from '../../elements/Box'
import GridBox from '../../elements/GridBox'
import ErrorMessage from '../../elements/ErrorMessage'
import Grid from '../../elements/Grid'
import Label from '../../elements/Label'
import Radio from '../../elements/Radio'
import { isNotEmptyOrNotNil, mapIndexed } from '../../utils'
import { type EventType, type InputType, type MetaType } from '../../types'

const mainGridModifierProps = (modifier, cols = '4') => {
  switch (modifier) {
    case 'vertical':
      return {
        gridGap: 2,
      }
    case 'leftJustifiedLabel':
      return {
        gridTemplateColumns: ['1fr', `repeat(${cols}, 1fr)`],
        gridTemplateRows: [`repeat(${cols}, 1fr)`, '1fr'],
        gridGap: 3,
        alignItems: 'center',
      }
    default:
      return {
        gridTemplateColumns: ['1fr', `repeat(${cols}, 1fr)`],
        gridTemplateRows: [`repeat(${cols}, 1fr)`, '1fr'],
        gridGap: 3,
      }
  }
}

type Props = {
  cols?: string,
  gridStyles?: {},
  input?: InputType,
  label: string,
  labelColor?: ?string,
  labelModifier?: ?string,
  labelTextStyle?: string,
  meta?: MetaType,
  modifier?: string,
  noLabel?: boolean,
  name?: string,
  onBlur?: ?(EventType) => void,
  onBlurDouble?: ?(string) => (EventType) => void,
  onChangeDouble?: ?(string) => (EventType) => void,
  onChange?: ?(EventType) => void,
  readOnly?: boolean,
  values: Array<{
    label: string,
    value: string,
    id?: ?string,
  }>,
}

class RadioGroup extends PureComponent<Props> {
  static defaultProps = {
    cols: '4',
    gridStyles: undefined,
    input: undefined,
    labelColor: undefined,
    labelModifier: undefined,
    labelTextStyle: 'caps',
    meta: undefined,
    modifier: 'horizontal',
    name: undefined,
    noLabel: false,
    onBlur: undefined,
    onBlurDouble: undefined,
    onChange: undefined,
    onChangeDouble: undefined,
    readOnly: false,
  }

  render() {
    const { cols, gridStyles, input,
      label, labelColor, labelModifier, labelTextStyle,
      meta, modifier, name, noLabel, onBlur, onBlurDouble,
      onChange, onChangeDouble, readOnly, values, ...styles } = this.props
    const inputName = name != null ? name : prop('name', input)
    return (
      <Box {...styles}>
        { modifier !== 'leftJustifiedLabel'
          && (
          <Label
            color={labelColor}
            fontSize={2}
            hidden={noLabel}
            htmlFor={inputName}
            mb={4}
            textStyle={labelModifier === 'decal' ? 'uppercase' : labelTextStyle}
            modifier={labelModifier}
          >
            {label}
          </Label>
          )
        }
        <Grid
          role="radiogroup"
          onChange={prop('onChange', input)}
          onBlur={prop('onBlur', input)}
          onFocus={prop('onFocus', input)}
          {...mainGridModifierProps(modifier, cols)}
          // $FlowFixMe: Dont want to limit styled-system props
          {...gridStyles}
        >
          { modifier === 'leftJustifiedLabel'
            && (
              <GridBox
                gridColumnStart="1"
                gridRowStart="1"
                gridColumnEnd={['span 1', 'span 2']}
                gridRowEnd={['span 2', 'span 1']}
              >
                <Label
                  hidden={noLabel}
                  htmlFor={inputName}
                  mb={0}
                  textStyle="caps"
                  fontSize={2}
                >
                  {label}
                </Label>
              </GridBox>
            )
          }
          { mapIndexed(({ label: optionLabel, value: optionValue, id }, index) => (
            <Radio
              checked={prop('value', input) === optionValue}
              id={`${inputName}-${optionLabel}`}
              key={optionLabel}
              label={optionLabel}
              name={inputName}
              onFocus={prop('onFocus', input)}
              onBlur={
                onBlurDouble != null && isNotEmptyOrNotNil(id)
                  ? onBlurDouble(id) : onBlur
              }
              onChange={
                onChangeDouble != null && isNotEmptyOrNotNil(id)
                  ? onChangeDouble(id) : onChange
              }
              tabIndex={index === 0 ? '0' : '-1'}
              readOnly={readOnly}
              value={optionValue}
            />
          ), values)
        }
        </Grid>
        { prop('touched', meta) === true && isNotEmptyOrNotNil(prop('error', meta))
          && (
          <ErrorMessage
            message={prop('error', meta)}
            maxWidth={116}
          />
          )
        }
      </Box>
    )
  }
}


export default RadioGroup