import 'package:flutter/material.dart';
import 'package:mileograph_flutter/objects/objects.dart';
import 'package:mileograph_flutter/services/data_service.dart';
import 'package:provider/provider.dart';

class FriendRequestNotificationCard extends StatelessWidget {
  const FriendRequestNotificationCard({super.key, required this.notification});

  final UserNotification notification;

  @override
  Widget build(BuildContext context) {
    final data = context.read<DataService>();
    final friendshipId = notification.body.trim();
    if (friendshipId.isEmpty) {
      return const Text('Invalid friend request notification.');
    }
    final future = data.fetchFriendshipById(friendshipId);
    return FutureBuilder<Friendship?>(
      future: future,
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.waiting) {
          return const Padding(
            padding: EdgeInsets.symmetric(vertical: 6.0),
            child: SizedBox(
              height: 20,
              width: 20,
              child: CircularProgressIndicator(strokeWidth: 2),
            ),
          );
        }
        if (snapshot.hasError) {
          return const Text('Failed to load request details.');
        }
        final friendship = snapshot.data;
        final requester = friendship?.requester;
        if (friendship == null || requester == null) {
          return const Text('Friend request details unavailable.');
        }
        final buttonStyle = ElevatedButton.styleFrom(
          minimumSize: const Size(0, 36),
        );
        return Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: [
                const Icon(Icons.person_add_alt, size: 18),
                const SizedBox(width: 6),
                Text(
                  requester.displayName.isNotEmpty
                      ? requester.displayName
                      : '@${requester.username}',
                  style: Theme.of(context).textTheme.titleSmall,
                ),
              ],
            ),
            const SizedBox(height: 6),
            Wrap(
              spacing: 8,
              children: [
                ElevatedButton(
                  style: buttonStyle,
                  onPressed: () =>
                      _respond(context, friendship.id, accept: true),
                  child: const Text('Accept'),
                ),
                ElevatedButton(
                  style: buttonStyle,
                  onPressed: () =>
                      _respond(context, friendship.id, accept: false),
                  child: const Text('Reject'),
                ),
              ],
            ),
          ],
        );
      },
    );
  }

  Future<void> _respond(
    BuildContext context,
    String? friendshipId, {
    required bool accept,
  }) async {
    if (friendshipId == null || friendshipId.isEmpty) return;
    final data = context.read<DataService>();
    final messenger = ScaffoldMessenger.maybeOf(context);
    try {
      if (accept) {
        await data.acceptFriendship(friendshipId);
        if (!context.mounted) return;
        messenger?.showSnackBar(
          const SnackBar(content: Text('Friend request accepted')),
        );
        await _dismissNotification(context, messenger);
      } else {
        await data.rejectFriendship(friendshipId);
        if (!context.mounted) return;
        messenger?.showSnackBar(
          const SnackBar(content: Text('Friend request rejected')),
        );
        await _dismissNotification(context, messenger);
      }
      await data.fetchPendingFriendships();
    } catch (e) {
      if (!context.mounted) return;
      messenger?.showSnackBar(
        SnackBar(content: Text('Failed to respond: $e')),
      );
    }
  }

  Future<void> _dismissNotification(
    BuildContext context,
    ScaffoldMessengerState? messenger,
  ) async {
    try {
      await context.read<DataService>().dismissNotifications([notification.id]);
    } catch (e) {
      messenger?.showSnackBar(
        SnackBar(content: Text('Failed to dismiss notification: $e')),
      );
    }
  }
}