import { useState, useEffect } from 'react';
import { useNavigate } from 'react-router-dom';
import Layout from '../components/layout/Layout';
import { eventsAPI } from '../services/api';
import { Calendar, MapPin, Users, Loader2, CheckCircle, QrCode } from 'lucide-react';

const EventsPage = () => {
  const navigate = useNavigate();
  const [events, setEvents] = useState([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState('');

  useEffect(() => {
    const fetchEvents = async () => {
      try {
        setLoading(true);
        const data = await eventsAPI.getAll();
        setEvents(data);
      } catch (err) {
        setError('Failed to load events');
        console.error('Error loading events:', err);
      } finally {
        setLoading(false);
      }
    };

    fetchEvents();
  }, []);

  const handleJoinEvent = (slug) => {
    navigate(`/events/${slug}/chat`);
  };

  if (loading) {
    return (
      <Layout>
        <div className="max-w-4xl mx-auto flex items-center justify-center min-h-[400px]">
          <div className="flex flex-col items-center gap-3">
            <Loader2 className="w-12 h-12 animate-spin text-primary-600" />
            <p className="text-gray-600">Loading events...</p>
          </div>
        </div>
      </Layout>
    );
  }

  if (error) {
    return (
      <Layout>
        <div className="max-w-4xl mx-auto">
          <div className="bg-red-50 border border-red-200 rounded-md p-4 text-red-700">
            {error}
          </div>
        </div>
      </Layout>
    );
  }

  return (
    <Layout>
      <div className="max-w-4xl mx-auto">
        <h1 className="text-3xl font-bold text-gray-900 mb-2">Choose an event</h1>
        <p className="text-gray-600 mb-8">Join an event and start connecting with other dancers</p>

        <div className="grid gap-6 md:grid-cols-2">
          {events.map((event) => (
            <div
              key={event.id}
              className={`bg-white rounded-lg shadow-md hover:shadow-lg transition-shadow p-6 border-2 ${
                event.isJoined ? 'border-primary-500' : 'border-gray-200'
              }`}
            >
              <div className="flex items-start justify-between mb-3">
                <h3 className="text-xl font-bold text-gray-900">{event.name}</h3>
                {event.isJoined && (
                  <span className="flex items-center gap-1 px-2 py-1 bg-primary-100 text-primary-700 text-xs font-medium rounded-full">
                    <CheckCircle className="w-3 h-3" />
                    Joined
                  </span>
                )}
              </div>

              <div className="space-y-2 mb-4">
                <div className="flex items-center text-gray-600">
                  <MapPin className="w-4 h-4 mr-2" />
                  <span className="text-sm">{event.location}</span>
                </div>
                <div className="flex items-center text-gray-600">
                  <Calendar className="w-4 h-4 mr-2" />
                  <span className="text-sm">
                    {new Date(event.startDate).toLocaleDateString('en-US')} - {new Date(event.endDate).toLocaleDateString('en-US')}
                  </span>
                </div>
                <div className="flex items-center text-gray-600">
                  <Users className="w-4 h-4 mr-2" />
                  <span className="text-sm">{event.participantsCount} participants</span>
                </div>
              </div>

              {event.description && (
                <p className="text-gray-600 text-sm mb-4">{event.description}</p>
              )}

              <div className="space-y-2">
                {event.isJoined ? (
                  <button
                    onClick={() => handleJoinEvent(event.slug)}
                    className="w-full px-4 py-2 bg-primary-600 text-white rounded-md hover:bg-primary-700 transition-colors"
                  >
                    Open chat
                  </button>
                ) : (
                  <div className="bg-amber-50 border border-amber-200 rounded-md p-4 text-sm text-amber-800">
                    <div className="flex items-center gap-2 font-medium mb-2">
                      <QrCode className="w-5 h-5" />
                      Check-in required
                    </div>
                    <p className="text-amber-700">
                      Scan the QR code at the event venue to join the chat
                    </p>
                  </div>
                )}

                {/* Development mode: Show details link */}
                {import.meta.env.DEV && (
                  <button
                    onClick={() => navigate(`/events/${event.slug}/details`)}
                    className="w-full px-4 py-2 border border-gray-300 text-gray-700 rounded-md hover:bg-gray-50 transition-colors text-sm"
                  >
                    View details (dev)
                  </button>
                )}
              </div>
            </div>
          ))}
        </div>
      </div>
    </Layout>
  );
};

export default EventsPage;
