import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:kettlebell_tracker/providers/settings_provider.dart';
import 'package:kettlebell_tracker/theme/app_theme.dart';
import 'package:kettlebell_tracker/widgets/custom_card.dart';
import 'package:kettlebell_tracker/widgets/custom_text_field.dart';

class SettingsScreen extends ConsumerStatefulWidget {
  const SettingsScreen({super.key});

  @override
  ConsumerState<SettingsScreen> createState() => _SettingsScreenState();
}

class _SettingsScreenState extends ConsumerState<SettingsScreen> {
  final _formKey = GlobalKey<FormState>();

  late TextEditingController _trainingTimeController;
  late TextEditingController _weightLeftController;
  late TextEditingController _weightRightController;
  late TextEditingController _goalSetsController;

  @override
  void initState() {
    super.initState();
    final settings = ref.read(settingsProvider);
    _trainingTimeController = TextEditingController(
      text: settings.trainingTimeMinutes.toString(),
    );
    _weightLeftController = TextEditingController(
      text: settings.weightLeft.toString(),
    );
    _weightRightController = TextEditingController(
      text: settings.weightRight.toString(),
    );
    _goalSetsController = TextEditingController(
      text: settings.goalSets.toString(),
    );
  }

  @override
  void dispose() {
    _trainingTimeController.dispose();
    _weightLeftController.dispose();
    _weightRightController.dispose();
    _goalSetsController.dispose();
    super.dispose();
  }

  void _saveSettings() {
    if (_formKey.currentState!.validate()) {
      final newSettings = SettingsState(
        trainingTimeMinutes: int.parse(_trainingTimeController.text),
        weightLeft: double.parse(_weightLeftController.text),
        weightRight: double.parse(_weightRightController.text),
        goalSets: int.parse(_goalSetsController.text),
      );
      ref.read(settingsProvider.notifier).updateSettings(newSettings);
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Einstellungen gespeichert!'),
          backgroundColor: AppTheme.oneDarkGreen,
        ),
      );
    } else {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Bitte korrigiere die Fehler.'),
          backgroundColor: AppTheme.oneDarkRed,
        ),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Einstellungen')),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(16.0),
        child: Form(
          key: _formKey,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              CustomCard(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      "Trainingsparameter",
                      style: Theme.of(context).textTheme.titleLarge,
                    ),
                    const SizedBox(height: 20),
                    CustomTextField(
                      controller: _trainingTimeController,
                      labelText: "Trainingszeit (Minuten)",
                      icon: Icons.timer,
                      keyboardType: TextInputType.number,
                    ),
                    const SizedBox(height: 16),
                    CustomTextField(
                      controller: _weightLeftController,
                      labelText: "Linke Kettlebell (kg)",
                      icon: Icons.fitness_center,
                      keyboardType: TextInputType.number,
                    ),
                    const SizedBox(height: 16),
                    CustomTextField(
                      controller: _weightRightController,
                      labelText: "Rechte Kettlebell (kg)",
                      icon: Icons.fitness_center,
                      keyboardType: TextInputType.number,
                    ),
                    const SizedBox(height: 16),
                    const SizedBox(height: 16),
                    CustomTextField(
                      controller: _goalSetsController,
                      labelText: "Ziel-Sätze",
                      icon: Icons.flag,
                      keyboardType: TextInputType.number,
                    ),
                  ],
                ),
              ),
              const SizedBox(height: 24),
              ElevatedButton.icon(
                onPressed: _saveSettings,
                icon: const Icon(Icons.save),
                label: const Text('Einstellungen speichern'),
                style: ElevatedButton.styleFrom(
                  backgroundColor: AppTheme.oneDarkPrimary,
                  foregroundColor: Colors.white,
                  padding: const EdgeInsets.symmetric(vertical: 16),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}