// password-field.tsx
// Copyright (C) 2020  Dwayne Harris

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

import React, { FC, ReactNode } from 'react'
import { useSelector, useDispatch } from 'react-redux'
import zxcvbn from 'zxcvbn'
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
import { faKey } from '@fortawesome/free-solid-svg-icons'
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'

export interface Props {
    placeholder?: string
    userInputs?: string[]
    showStrength?: boolean
}

const PasswordField: FC<Props> = ({
    placeholder,
    userInputs = [],
    showStrength = true,
}) => {
    const theme = useTheme()
    const value = useSelector<AppState, string>(state => getFieldValue<string>(state, 'password', ''))
    const notification = useSelector<AppState, FormNotification | undefined>(state => getFieldNotification(state, 'password'))
    const dispatch = useDispatch()

    let passwordMessage: ReactNode | undefined
    let successState = false
    let errorState = false

    if (value && showStrength) {
        const { score } = zxcvbn(value, userInputs)

        switch (score) {
            case 0:
                errorState = true
                passwordMessage = <span>Strength: <span style={{ color: theme.red }}>Unusable</span></span>
                break
            case 1:
                errorState = true
                passwordMessage = <span>Strength: <span style={{ color: theme.red }}>Not good</span></span>
                break
            case 2:
                passwordMessage = <span>Strength: <span>OK</span></span>
                break
            case 3:
                successState = true
                passwordMessage = <span>Strength: <span style={{ color: theme.green }}>Good!</span></span>
                break
            case 4:
                successState = true
                passwordMessage = <span>Strength: <span style={{ color: theme.green }}>LIT</span></span>
                break
        }
    }

    if (notification) {
        switch (notification.type) {
            case NotificationType.Success:
                errorState = false
                successState = true
            case NotificationType.Error:
                errorState = true
                successState = false
        }
    }

    const color = successState ? theme.green : errorState ? theme.red : theme.primary

    const helpText = () => {
        if (notification) return <FormNotificationComponent notification={notification} />
        if (passwordMessage) return <p className="help">{passwordMessage}</p>
    }

    return (
        <div className="field">
            <FieldLabel>Password</FieldLabel>
            <div className="control-container">
                <div className="control-icon" style={{ backgroundColor: color, color: theme.primaryAlternate }}>
                    <FontAwesomeIcon icon={faKey} />
                </div>
                <div className="control">
                    <input
                        style={{ backgroundColor: theme.backgroundSecondary, borderColor: color, color: theme.text }}
                        type="password"
                        placeholder={placeholder}
                        value={value}
                        onChange={e => dispatch(setFieldValue('password', e.target.value))} />
                </div>
            </div>
            {helpText()}
        </div>
    )
}

export default PasswordField