import 'package:flutter/material.dart';

import '../application/app_bootstrap.dart';
import '../domain/domain.dart';
import 'exercise_library_screen.dart';
import 'program_screen.dart';
import 'workout_execution_screen.dart';
import 'workout_template_screen.dart';

final class HomeScreen extends StatefulWidget {
  const HomeScreen({required this.bootstrap, super.key});

  final AppBootstrap bootstrap;

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

final class _HomeScreenState extends State<HomeScreen> {
  late Future<ActiveWorkoutSession?> _openSession;

  @override
  void initState() {
    super.initState();
    _openSession = widget.bootstrap.activeWorkoutSessionUseCases.findOpen();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('GameTime')),
      body: ListView(
        children: [
          FutureBuilder<ActiveWorkoutSession?>(
            future: _openSession,
            builder: (context, snapshot) {
              final session = snapshot.data;
              if (session == null) {
                return const SizedBox.shrink();
              }
              final plan = WorkoutExecutionPlan.fromSession(session);
              final position = ExecutionPosition(
                programIndex: session.currentProgramIndex,
                exerciseIndex: session.currentExerciseIndex,
                setIndex: session.currentSetIndex,
              );
              final exercise = plan.exerciseAt(position);
              return MaterialBanner(
                content: Text(
                  'Séance en cours — Reprendre · ${exercise.name}, '
                  'série ${position.setIndex + 1}/${exercise.setsCount}',
                ),
                actions: [
                  TextButton(
                    onPressed: () => _resume(session),
                    child: const Text('Reprendre'),
                  ),
                ],
              );
            },
          ),
          ListTile(
            leading: const Icon(Icons.fitness_center),
            title: const Text('Exercices'),
            trailing: const Icon(Icons.chevron_right),
            onTap: () => Navigator.of(context).push(
              MaterialPageRoute(
                builder: (context) => ExerciseLibraryScreen(
                  exerciseUseCases: widget.bootstrap.exerciseUseCases,
                  mediaUseCases: widget.bootstrap.mediaUseCases,
                ),
              ),
            ),
          ),
          ListTile(
            leading: const Icon(Icons.list_alt),
            title: const Text('Programmes'),
            trailing: const Icon(Icons.chevron_right),
            onTap: () => Navigator.of(context).push(
              MaterialPageRoute(
                builder: (context) => ProgramListScreen(
                  programUseCases: widget.bootstrap.programUseCases,
                  exerciseUseCases: widget.bootstrap.exerciseUseCases,
                ),
              ),
            ),
          ),
          ListTile(
            leading: const Icon(Icons.event_note),
            title: const Text('Séances'),
            trailing: const Icon(Icons.chevron_right),
            onTap: () => Navigator.of(context).push(
              MaterialPageRoute(
                builder: (context) => WorkoutTemplateListScreen(
                  workoutTemplateUseCases:
                      widget.bootstrap.workoutTemplateUseCases,
                  programUseCases: widget.bootstrap.programUseCases,
                  activeUseCases: widget.bootstrap.activeWorkoutSessionUseCases,
                  closeUseCase: widget.bootstrap.closeWorkoutSessionUseCase,
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }

  Future<void> _resume(ActiveWorkoutSession session) async {
    await Navigator.of(context).push(
      MaterialPageRoute(
        builder: (context) => WorkoutExecutionScreen(
          initialSession: session,
          activeUseCases: widget.bootstrap.activeWorkoutSessionUseCases,
          closeUseCase: widget.bootstrap.closeWorkoutSessionUseCase,
        ),
      ),
    );
    if (!mounted) return;
    setState(() {
      _openSession = widget.bootstrap.activeWorkoutSessionUseCases.findOpen();
    });
  }
}