'use client';

import { useEffect, useState } from 'react';
import type { BeoOption } from '@/types/logbuch';
import CustomSelect from './CustomSelect';

interface Props {
  selected: BeoOption[];
  onChange: (beos: BeoOption[]) => void;
}

export default function BeoSelector({ selected, onChange }: Props) {
  const [all, setAll] = useState<BeoOption[]>([]);

  useEffect(() => {
    fetch('/api/beos')
      .then((r) => { if (!r.ok) throw new Error('Fehler'); return r.json(); })
      .then(setAll)
      .catch(() => {});
  }, []);

  const selectedIds = new Set(selected.map((b) => b.ID));
  const available = all
    .filter((b) => !selectedIds.has(b.ID))
    .sort((a, b) => a.Kuerzel.localeCompare(b.Kuerzel));

  function add(value: string) {
    const beo = all.find((b) => b.ID === parseInt(value));
    if (beo) onChange([...selected, beo]);
  }

  function remove(id: number) {
    onChange(selected.filter((b) => b.ID !== id));
  }

  return (
    <div className="space-y-3">
      <div className="flex flex-wrap gap-2">
        {selected.map((b) => (
          <span
            key={b.ID}
            className="inline-flex items-center gap-2 bg-blue-100 text-blue-800 text-base px-3 py-1.5 rounded-full"
          >
            {b.Kuerzel}
            <button
              type="button"
              onClick={() => remove(b.ID)}
              className="flex items-center justify-center w-7 h-7 rounded-full text-blue-600 hover:bg-red-100 hover:text-red-600 font-bold text-xl leading-none"
              aria-label={`${b.Kuerzel} entfernen`}
            >
              ×
            </button>
          </span>
        ))}
      </div>

      {available.length > 0 && (
        <CustomSelect
          placeholder="+ BEOs hinzufügen"
          options={available.map((b) => ({ value: String(b.ID), label: `${b.Kuerzel} — ${b.Name}` }))}
          onChange={add}
          keepOpen
        />
      )}
    </div>
  );
}