Mini Project: Habit Tracker

class HabitTracker extends StatefulWidget {
  const HabitTracker({super.key});

  @override
  State<HabitTracker> createState() => _HabitTrackerState();
}

class _HabitTrackerState extends State<HabitTracker> {
  final controller = TextEditingController();
  final List<Map<String, dynamic>> habits = [];

  void addHabit() {
    final name = controller.text.trim();

    if (name.isEmpty) return;

    setState(() {
      habits.add({'name': name, 'done': 0});
      controller.clear();
    });
  }

  void completeHabit(int index) {
    setState(() {
      habits[index]['done']++;
    });
  }

  @override
  void dispose() {
    controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Habit Tracker')),
      body: Padding(
        padding: const EdgeInsets.all(16),
        child: Column(
          children: [
            TextField(
              controller: controller,
              decoration: const InputDecoration(
                labelText: 'New habit',
                border: OutlineInputBorder(),
              ),
            ),
            const SizedBox(height: 12),
            ElevatedButton(
              onPressed: addHabit,
              child: const Text('Add Habit'),
            ),
            const SizedBox(height: 20),
            Expanded(
              child: ListView.builder(
                itemCount: habits.length,
                itemBuilder: (context, index) {
                  final habit = habits[index];

                  return Card(
                    child: ListTile(
                      title: Text(habit['name']),
                      subtitle: Text("Completed: ${habit['done']} times"),
                      trailing: const Icon(Icons.check_circle_outline),
                      onTap: () => completeHabit(index),
                    ),
                  );
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}