import { useEffect, useState } from 'react';
import { useNavigate, useParams } from 'react-router-dom';
import { useTranslation } from 'react-i18next';
import { Trash2 } from 'lucide-react';
import { sessions } from '../api';
import type { Session } from '../api';
import { Badge, Breadcrumbs, Button, Card, DescriptionList, Notification, Timestamp } from '../ui';
import styles from './Page.module.css';

export function SessionDetailPage() {
  const { t } = useTranslation();
  const { id } = useParams<{ id: string }>();
  const navigate = useNavigate();
  const [session, setSession] = useState<Session | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  useEffect(() => {
    if (!id) return;
    sessions
      .get(Number(id))
      .then(setSession)
      .catch((err: Error) => setError(err.message))
      .finally(() => setLoading(false));
  }, [id]);

  const handleDelete = async () => {
    if (!session) return;
    await sessions.remove(session.id);
    navigate('/sessions');
  };

  return (
    <div>
      <div className={styles.pageToolbar}>
        <Breadcrumbs
          items={[
            { label: t('sessions.title'), onClick: () => navigate('/sessions') },
            { label: session?.sessionName ?? `#${id}` },
          ]}
        />
        {session && (
          <Button variant="danger" size="sm" onClick={handleDelete}>
            <Trash2 size={14} />
            {t('sessions.action_delete')}
          </Button>
        )}
      </div>

      {error && (
        <Notification
          variant="error"
          title={error.startsWith('404') ? t('errors.not_found') : undefined}
        >
          {error.startsWith('404') ? t('errors.not_found_session', { id }) : error}
        </Notification>
      )}
      {loading && <p className={styles.muted}>{t('sessions.loading')}</p>}

      {session && (
        <Card>
          <DescriptionList
            layout="comfortable"
            items={[
              { term: t('sessions.field_id'), detail: session.id },
              { term: t('sessions.field_name'), detail: session.sessionName },
              {
                term: t('sessions.field_status'),
                detail: (
                  <Badge variant={session.status === 'open' ? 'success' : 'error'}>
                    {session.status}
                  </Badge>
                ),
              },
              {
                term: t('sessions.field_token'),
                detail: <code className={styles.codeInline}>{session.token}</code>,
              },
              {
                term: t('sessions.field_lastUsed'),
                detail: session.lastUsedAt ? <Timestamp value={session.lastUsedAt} /> : '—',
              },
              {
                term: t('sessions.field_created'),
                detail: <Timestamp value={session.createdAt} />,
              },
              {
                term: t('sessions.field_updated'),
                detail: <Timestamp value={session.updatedAt} />,
              },
            ]}
          />
        </Card>
      )}
    </div>
  );
}