lib/src/presentation/screens/workouts_screen.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:intl/intl.dart';
import 'package:trainlog/src/data/models/workout.dart';
import 'package:trainlog/src/presentation/providers/workout_providers.dart';

class WorkoutsScreen extends ConsumerWidget {
  const WorkoutsScreen({super.key});
  
  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final workoutsAsync = ref.watch(workoutsProvider);
    
    return CupertinoPageScaffold(
      navigationBar: CupertinoNavigationBar(
        middle: const Text('Historia treningów'),
        trailing: CupertinoButton(
          padding: EdgeInsets.zero,
          child: const Icon(CupertinoIcons.add),
          onPressed: () => context.go('/workout/new'),
        ),
      ),
      child: workoutsAsync.when(
        data: (workouts) => workouts.isEmpty
            ? const _EmptyState()
            : ListView.builder(
                padding: const EdgeInsets.all(16),
                itemCount: workouts.length,
                itemBuilder: (context, index) {
                  final workout = workouts[index];
                  return _WorkoutListItem(
                    workout: workout,
                    onTap: () => context.go('/workout/edit/${workout.id}'),
                    onDuplicate: () => _duplicateWorkout(context, ref, workout.id),
                  );
                },
              ),
        loading: () => const Center(child: CupertinoActivityIndicator()),
        error: (err, _) => Center(child: Text('Błąd: $err')),
      ),
    );
  }
  
  Future<void> _duplicateWorkout(BuildContext context, WidgetRef ref, int id) async {
    final repo = ref.read(workoutRepositoryProvider);
    try {
      await repo.duplicateWorkout(id);
      if (context.mounted) {
        showCupertinoDialog(
          context: context,
          builder: (_) => CupertinoAlertDialog(
            title: const Text('Sukces'),
            content: const Text('Trening został zduplikowany'),
            actions: [
              CupertinoDialogAction(
                child: const Text('OK'),
                onPressed: () => Navigator.pop(context),
              ),
            ],
          ),
        );
      }
    } catch (e) {
      if (context.mounted) {
        showCupertinoDialog(
          context: context,
          builder: (_) => CupertinoAlertDialog(
            title: const Text('Błąd'),
            content: Text(e.toString()),
            actions: [
              CupertinoDialogAction(
                child: const Text('OK'),
                onPressed: () => Navigator.pop(context),
              ),
            ],
          ),
        );
      }
    }
  }
}

class _WorkoutListItem extends StatelessWidget {
  final Workout workout;
  final VoidCallback onTap;
  final VoidCallback onDuplicate;
  
  const _WorkoutListItem({
    required this.workout,
    required this.onTap,
    required this.onDuplicate,
  });
  
  @override
  Widget build(BuildContext context) {
    return Dismissible(
      key: Key(workout.id.toString()),
      direction: DismissDirection.endToStart,
      background: Container(
        alignment: Alignment.centerRight,
        padding: const EdgeInsets.only(right: 20),
        color: CupertinoColors.destructiveRed,
        child: const Icon(CupertinoIcons.delete, color: CupertinoColors.white),
      ),
      onDismissed: (_) => onDuplicate(),
      child: Container(
        margin: const EdgeInsets.only(bottom: 8),
        child: CupertinoButton(
          padding: EdgeInsets.zero,
          onPressed: onTap,
          child: Container(
            padding: const EdgeInsets.all(16),
            decoration: BoxDecoration(
              color: CupertinoColors.systemBackground.resolveFrom(context),
              borderRadius: BorderRadius.circular(10),
            ),
            child: Row(
              children: [
                Container(
                  width: 48,
                  height: 48,
                  decoration: BoxDecoration(
                    color: CupertinoColors.systemGrey6.resolveFrom(context),
                    borderRadius: BorderRadius.circular(8),
                  ),
                  child: Center(
                    child: Text(
                      workout.type.icon,
                      style: const TextStyle(fontSize: 20),
                    ),
                  ),
                ),
                const SizedBox(width: 12),
                Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        DateFormat('d MMM yyyy, HH:mm', 'pl_PL').format(workout.date),
                        style: const TextStyle(
                          fontSize: 15,
                          fontWeight: FontWeight.w600,
                        ),
                      ),
                      const SizedBox(height: 2),
                      Text(
                        workout.type.displayName,
                        style: TextStyle(
                          fontSize: 13,
                          color: CupertinoColors.secondaryLabel.resolveFrom(context),
                        ),
                      ),
                      if (workout.note != null && workout.note!.isNotEmpty)
                        Text(
                          workout.note!,
                          maxLines: 1,
                          overflow: TextOverflow.ellipsis,
                          style: TextStyle(
                            fontSize: 12,
                            color: CupertinoColors.tertiaryLabel.resolveFrom(context),
                          ),
                        ),
                    ],
                  ),
                ),
                CupertinoButton(
                  padding: EdgeInsets.zero,
                  child: const Icon(
                    CupertinoIcons.doc_on_doc,
                    size: 20,
                    color: CupertinoColors.activeOrange,
                  ),
                  onPressed: () {
                    showCupertinoModalPopup(
                      context: context,
                      builder: (context) => CupertinoActionSheet(
                        title: const Text('Opcje'),
                        actions: [
                          CupertinoActionSheetAction(
                            onPressed: () {
                              Navigator.pop(context);
                              onDuplicate();
                            },
                            child: const Text('Duplikuj trening'),
                          ),
                        ],
                        cancelButton: CupertinoActionSheetAction(
                          onPressed: () => Navigator.pop(context),
                          isDefaultAction: true,
                          child: const Text('Anuluj'),
                        ),
                      ),
                    );
                  },
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

class _EmptyState extends StatelessWidget {
  const _EmptyState();
  
  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Icon(
            CupertinoIcons.list_bullet,
            size: 64,
            color: CupertinoColors.systemGrey.resolveFrom(context),
          ),
          const SizedBox(height: 16),
          Text(
            'Brak treningów',
            style: TextStyle(
              fontSize: 20,
              fontWeight: FontWeight.w600,
              color: CupertinoColors.secondaryLabel.resolveFrom(context),
            ),
          ),
          const SizedBox(height: 8),
          Text(
            'Naciśnij + aby dodać pierwszy trening',
            style: TextStyle(
              color: CupertinoColors.tertiaryLabel.resolveFrom(context),
            ),
          ),
        ],
      ),
    );
  }
}