import React, { memo, InputHTMLAttributes } from 'react'
import styled from 'styled-components'

type TextInputProps = {
    type?: 'text' | 'number'
    // We often use a text input to enter a number.
    isNumber?: boolean
    unit?: 'px' | '°' | 'ms'
} & InputHTMLAttributes<HTMLInputElement>

export const TextInput = memo(
    ({ type = 'text', unit, isNumber = false, ...props }: TextInputProps) => {
        const hasUnit = !!unit

        return (
            <Container>
                <InputElement type={type} $hasUnit={hasUnit} $isNumber={isNumber} {...props} />
                {hasUnit && <Unit>{unit}</Unit>}
            </Container>
        )
    }
)

const Container = styled.div`
    position: relative;
    height: 28px;
    width: 100%;
`

const Unit = styled.span`
    position: absolute;
    top: 1px;
    right: 1px;
    font-size: 12px;
    height: 26px;
    display: flex;
    align-items: center;
    padding: 0 7px;
    pointer-events: none;
    color: ${({ theme }) => theme.colors.textLight};
`

const InputElement = styled.input<{
    $hasUnit: boolean
    $isNumber: boolean
}>`
    height: 100%;
    width: 100%;
    font-size: 12px;
    padding: 0 7px;
    padding-right: ${({ $hasUnit }) => ($hasUnit ? 26 : 7)}px;
    border-radius: 1px;
    background: ${({ theme }) => theme.colors.inputBackground};
    border: 1px solid ${({ theme }) => theme.colors.border};
    cursor: pointer;
    color: inherit;
    text-align: ${({ $isNumber }) => ($isNumber ? 'right' : 'left')};

    &:focus {
        outline: 0;
        cursor: auto;
        border-color: ${({ theme }) => theme.colors.accent};
        color: ${({ theme }) => theme.colors.text};
        box-shadow: 0 0 0 1px ${({ theme }) => theme.colors.accent};
    }

    &:disabled {
        cursor: not-allowed;
        color: ${({ theme }) => theme.colors.textLight};
    }
`