import React, { FC, FocusEventHandler } from 'react'
import { useSelector, useDispatch } from 'react-redux'
import noop from 'lodash/noop'
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
import { IconDefinition } from '@fortawesome/fontawesome-common-types'
import { useTheme } from '../../hooks'
import { setFieldValue } from '../../actions/forms'
import { getFieldValue, getFieldNotification } from '../../selectors/forms'
import { AppState, FormNotification, NotificationType } from '../../types'

import FieldLabel from '../../components/controls/field-label'
import FormNotificationComponent from '../../components/form-notification'
import HelpText from '../../components/help-text'

interface Props {
    name: string
    label: string
    type?: 'text' | 'email'
    placeholder?: string
    help?: string
    icon?: IconDefinition
    onBlur?: FocusEventHandler<HTMLInputElement>
}

const TextField: FC<Props> = ({
    name,
    label,
    type = 'text',
    placeholder,
    help,
    icon,
    onBlur = noop,
}) => {
    const theme = useTheme()
    const value = useSelector<AppState, string>(state => getFieldValue<string>(state, name, ''))
    const notification = useSelector<AppState, FormNotification | undefined>(state => getFieldNotification(state, name))
    const dispatch = useDispatch()

    let color = theme.primary

    if (notification) {
        switch (notification.type) {
            case NotificationType.Error:
                color = theme.red
                break
            case NotificationType.Success:
                color = theme.green
                break
        }
    }

    return (
        <div className="field">
            <FieldLabel>{label}</FieldLabel>
            <div className="control-container">
                {icon &&
                    <div className="control-icon" style={{ backgroundColor: color, color: theme.primaryAlternate }}>
                        <FontAwesomeIcon icon={icon} />
                    </div>
                }
                <div className="control">
                    <input
                        style={{ backgroundColor: theme.backgroundSecondary, borderColor: color, color: theme.text }}
                        type={type}
                        placeholder={placeholder}
                        value={value}
                        onChange={e => dispatch(setFieldValue(name, e.target.value))}
                        onBlur={onBlur} />
                </div>
            </div>
            {(!notification && help) && <HelpText>{help}</HelpText>}
            {notification && <FormNotificationComponent notification={notification} />}
        </div>
    )
}

export default TextField