import clsx from 'clsx';
import { useMemo } from 'react';

import { CheckboxCheckedIcon, CheckboxNullIcon } from '../Icons';
import { CheckboxProps } from './Checkbox';
import Label from './Label';

export interface TristateProps
extends Omit<CheckboxProps, 'value' | 'setValue'> {
  value: boolean | null
  setValue?: (newValue: boolean | null) => void
}

function Tristate({
  id, disabled, label, 
  className,
  value, setValue,
  ...restProps
}: TristateProps) {
  const cursor = useMemo(
  () => {
    if (disabled) {
      return 'cursor-not-allowed';
    } else if (setValue) {
      return 'cursor-pointer';
    } else {
      return ''
    }
  }, [disabled, setValue]);

  function handleClick(event: React.MouseEvent<HTMLButtonElement, MouseEvent>): void {
    event.preventDefault();
    if (disabled || !setValue) {
      return;
    }
    if (value === false) {
      setValue(null); 
    } else if (value === null) {
      setValue(true);
    } else {
      setValue(false);
    }
  }

  return (
  <button type='button' id={id}
  className={clsx(
      'flex items-center gap-2 text-start',
      'outline-none',
      cursor,
      className
    )}
    disabled={disabled}
    onClick={handleClick}
    {...restProps}
  >
    <div className={clsx(
      'w-4 h-4',
      'border rounded-sm',
      {
        'clr-primary': value !== false,
        'clr-app': value === false
      }
    )}>
      {value ? <div className='mt-[1px] ml-[1px]'><CheckboxCheckedIcon /></div> : null}
      {value == null ? <div className='mt-[1px] ml-[1px]'><CheckboxNullIcon /></div> : null}
    </div>
    <Label className={cursor} text={label} htmlFor={id} />
  </button>);
}

export default Tristate;