import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:intl/intl.dart';

import '../../domain/event.dart';
import 'countdown_timer.dart';

/// Material 3 card representing a single [Event] in the events list.
///
/// Tap navigates to `/events/:id`. Visual emphasis is given to the title,
/// the countdown chip, and the registration headcount.
class EventCard extends StatelessWidget {
  const EventCard({super.key, required this.event});

  final Event event;

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final scheme = theme.colorScheme;

    final dateLabel = DateFormat('EEE, MMM d  ·  h:mm a').format(event.date);
    final isFull =
        event.teamsRegistered >= event.maxTeams && event.maxTeams > 0;

    return Card(
      clipBehavior: Clip.antiAlias,
      margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
      child: InkWell(
        onTap: () => context.go('/events/${event.id}'),
        child: Padding(
          padding: const EdgeInsets.all(16),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Expanded(
                    child: Text(
                      event.title,
                      style: theme.textTheme.titleLarge?.copyWith(
                        fontWeight: FontWeight.w700,
                      ),
                    ),
                  ),
                  const SizedBox(width: 12),
                  CountdownTimer(target: event.date),
                ],
              ),
              const SizedBox(height: 8),
              Row(
                children: <Widget>[
                  _CategoryChip(category: event.category),
                  if (event.isCancelled) ...<Widget>[
                    const SizedBox(width: 8),
                    _CancelledChip(scheme: scheme),
                  ],
                ],
              ),
              const SizedBox(height: 12),
              _IconRow(
                icon: Icons.calendar_today_outlined,
                color: scheme.onSurfaceVariant,
                child: Text(
                  dateLabel,
                  style: theme.textTheme.bodyMedium?.copyWith(
                    color: scheme.onSurfaceVariant,
                  ),
                ),
              ),
              const SizedBox(height: 6),
              _IconRow(
                icon: Icons.place_outlined,
                color: scheme.onSurfaceVariant,
                child: Text(
                  event.location,
                  style: theme.textTheme.bodyMedium?.copyWith(
                    color: scheme.onSurfaceVariant,
                  ),
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                ),
              ),
              const SizedBox(height: 12),
              Row(
                children: [
                  Icon(Icons.groups_outlined, size: 18, color: scheme.primary),
                  const SizedBox(width: 6),
                  Text(
                    '${event.teamsRegistered} / ${event.maxTeams} teams',
                    style: theme.textTheme.titleSmall?.copyWith(
                      color: scheme.primary,
                      fontWeight: FontWeight.w600,
                    ),
                  ),
                  const Spacer(),
                  if (isFull)
                    Text(
                      'Preferred count reached',
                      style: theme.textTheme.labelSmall?.copyWith(
                        color: scheme.tertiary,
                      ),
                    ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }
}

class _IconRow extends StatelessWidget {
  const _IconRow({
    required this.icon,
    required this.color,
    required this.child,
  });

  final IconData icon;
  final Color color;
  final Widget child;

  @override
  Widget build(BuildContext context) {
    return Row(
      crossAxisAlignment: CrossAxisAlignment.center,
      children: [
        Icon(icon, size: 16, color: color),
        const SizedBox(width: 6),
        Expanded(child: child),
      ],
    );
  }
}

class _CancelledChip extends StatelessWidget {
  const _CancelledChip({required this.scheme});

  final ColorScheme scheme;

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 4),
      decoration: BoxDecoration(
        color: scheme.errorContainer,
        borderRadius: BorderRadius.circular(999),
      ),
      child: Text(
        'Cancelled',
        style: Theme.of(context).textTheme.labelSmall?.copyWith(
          color: scheme.onErrorContainer,
          fontWeight: FontWeight.w700,
        ),
      ),
    );
  }
}

class _CategoryChip extends StatelessWidget {
  const _CategoryChip({required this.category});

  final EventCategory category;

  static const Color _tournamentColor = Color(0xFF8B30C8);
  static const Color _pickupColor = Color(0xFF26A69A);

  @override
  Widget build(BuildContext context) {
    final isTournament = category == EventCategory.tournament;
    final color = isTournament ? _tournamentColor : _pickupColor;
    final label = isTournament ? 'TOURNAMENT' : 'PICK-UP';
    final icon = isTournament
        ? Icons.emoji_events_outlined
        : Icons.sports_soccer;

    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 4),
      decoration: BoxDecoration(
        color: color.withValues(alpha: 0.18),
        borderRadius: BorderRadius.circular(999),
        border: Border.all(color: color.withValues(alpha: 0.55)),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          Icon(icon, size: 13, color: color),
          const SizedBox(width: 4),
          Text(
            label,
            style: Theme.of(context).textTheme.labelSmall?.copyWith(
              color: color,
              fontWeight: FontWeight.w800,
              letterSpacing: 0.8,
            ),
          ),
        ],
      ),
    );
  }
}