import { useMemo } from 'react';
import { Link } from 'react-router-dom';
import { formatDistanceToNow } from 'date-fns';
import Layout from '../components/Layout';
import SeverityBadge from '../components/SeverityBadge';
import StatusBadge from '../components/StatusBadge';
import { useTickets } from '../api/queries';
import { useAuth } from '../contexts/AuthContext';
import { SEVERITY_BG } from '../lib/severityColors';

export default function MyTickets() {
  const { user } = useAuth();
  const openQ = useTickets(user ? { assigneeId: user.id, status: 'OPEN' } : {});
  const inProgressQ = useTickets(user ? { assigneeId: user.id, status: 'IN_PROGRESS' } : {});

  const loading = openQ.isLoading || inProgressQ.isLoading;

  const tickets = useMemo(() => {
    if (!user) return [];
    const combined = [...(openQ.data ?? []), ...(inProgressQ.data ?? [])];
    combined.sort(
      (a, b) =>
        a.severity - b.severity ||
        new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime(),
    );
    return combined;
  }, [user, openQ.data, inProgressQ.data]);

  return (
    <Layout title="My Tickets">
      {loading ? (
        <div className="text-center py-16 text-gray-600 text-sm">Loading...</div>
      ) : tickets.length === 0 ? (
        <div className="text-center py-16 text-gray-600 text-sm">
          No active tickets assigned to you
        </div>
      ) : (
        <div className="space-y-1.5">
          {tickets.map((ticket) => (
            <Link
              key={ticket.id}
              to={`/${ticket.displayId}`}
              className="flex items-center gap-4 bg-gray-900 border border-gray-800 rounded-lg px-4 py-3 hover:border-indigo-500/50 transition-all group"
            >
              <div
                className={`w-1 self-stretch rounded-full flex-shrink-0 ${SEVERITY_BG[ticket.severity] ?? 'bg-gray-600'}`}
              />

              <div className="flex-1 min-w-0">
                <div className="flex items-center gap-2 mb-0.5 flex-wrap">
                  <span className="text-xs font-mono font-medium text-gray-600">
                    {ticket.displayId}
                  </span>
                  <SeverityBadge severity={ticket.severity} />
                  <StatusBadge status={ticket.status} />
                  <span className="text-xs text-gray-600">
                    {ticket.category.name} › {ticket.type.name} › {ticket.item.name}
                  </span>
                </div>
                <p className="text-sm font-medium text-gray-200 truncate group-hover:text-indigo-400">
                  {ticket.title}
                </p>
              </div>

              <div className="flex items-center gap-3 flex-shrink-0">
                <span className="text-xs text-gray-600">
                  {ticket._count?.comments ?? 0} comments
                </span>
                <span className="text-xs text-gray-600">
                  {formatDistanceToNow(new Date(ticket.createdAt), { addSuffix: true })}
                </span>
              </div>
            </Link>
          ))}
        </div>
      )}
    </Layout>
  );
}