import React from 'react';
import './ButtonGroup.css';

export default function ButtonGroup({ options = [], value, multiple = false, size = 'default', onChange }) {
  function isSelected(v) {
    return multiple ? (value || []).indexOf(v) >= 0 : value === v;
  }
  function toggle(o) {
    if (o.disabled) return;
    let next;
    if (multiple) {
      const arr = (value || []).slice();
      const idx = arr.indexOf(o.value);
      if (idx >= 0) arr.splice(idx, 1); else arr.push(o.value);
      next = arr;
    } else {
      next = o.value;
    }
    onChange && onChange(next);
  }

  const sizeCls = size === 'small' ? ' is-sm' : size === 'large' ? ' is-lg' : '';
  return (
    <div className={'aa-btngroup' + sizeCls}>
      {options.map((o, i) => (
        <button
          key={i}
          className={'aa-btngroup-btn' + (isSelected(o.value) ? ' is-selected' : '') + (o.disabled ? ' is-disabled' : '')}
          disabled={!!o.disabled}
          onClick={() => toggle(o)}
        >
          {o.label}
        </button>
      ))}
    </div>
  );
}