import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:intl/intl.dart';

class AlarmModel {
  final int id;
  final TimeOfDay time;
  final List<bool> days; // 7 days from Monday to Sunday
  final String label;
  bool isActive;

  AlarmModel({
    required this.id,
    required this.time,
    required this.days,
    required this.label,
    this.isActive = true,
  });

  String get timeString {
    final hour = time.hour;
    final minute = time.minute;
    return '${hour.toString().padLeft(2, '0')}:${minute.toString().padLeft(2, '0')}';
  }

  String get repeatDaysString {
    List<String> dayShortNames = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'];
    List<String> activeDays = [];

    for (int i = 0; i < 7; i++) {
      if (days[i]) {
        activeDays.add(dayShortNames[i]);
      }
    }

    if (activeDays.isEmpty) {
      return 'One time';
    } else if (activeDays.length == 7) {
      return 'Every day';
    } else if (activeDays.length == 5 && 
               days[0] && days[1] && days[2] && days[3] && days[4]) {
      return 'Weekdays';
    } else if (activeDays.length == 2 && days[5] && days[6]) {
      return 'Weekends';
    } else {
      return activeDays.join(', ');
    }
  }
}

class AlarmPage extends StatefulWidget {
  @override
  State<AlarmPage> createState() => _AlarmPageState();
}

class _AlarmPageState extends State<AlarmPage> {
  List<AlarmModel> _alarms = [];
  int _nextId = 0;

  @override
  void initState() {
    super.initState();
    // Add some sample alarms
    _addAlarm(
      TimeOfDay(hour: 8, minute: 0),
      [true, true, true, true, true, false, false],
      'Wake up',
    );
    _addAlarm(
      TimeOfDay(hour: 18, minute: 30),
      [true, true, true, true, true, true, true],
      'Evening reminder',
    );
  }

  void _addAlarm(TimeOfDay time, List<bool> days, String label) {
    setState(() {
      _alarms.add(
        AlarmModel(
          id: _nextId++,
          time: time,
          days: days,
          label: label,
        ),
      );
    });
  }

  void _toggleAlarm(int id) {
    setState(() {
      for (int i = 0; i < _alarms.length; i++) {
        if (_alarms[i].id == id) {
          _alarms[i].isActive = !_alarms[i].isActive;
          break;
        }
      }
    });
  }

  void _deleteAlarm(int id) {
    setState(() {
      _alarms.removeWhere((alarm) => alarm.id == id);
    });
  }

  Future<void> _showAddAlarmDialog() async {
    final TimeOfDay initialTime = TimeOfDay.now();
    final List<bool> days = List.generate(7, (_) => false);
    final TextEditingController labelController = TextEditingController();

    await showDialog(
      context: context,
      builder: (BuildContext context) {
        TimeOfDay selectedTime = initialTime;

        return StatefulBuilder(
          builder: (context, setState) {
            return AlertDialog(
              title: Text('Add Alarm'),
              content: SingleChildScrollView(
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    // Time picker button
                    ListTile(
                      title: Text('Time'),
                      subtitle: Text(
                        '${selectedTime.hour.toString().padLeft(2, '0')}:${selectedTime.minute.toString().padLeft(2, '0')}',
                        style: TextStyle(fontSize: 24.sp),
                      ),
                      onTap: () async {
                        final TimeOfDay? picked = await showTimePicker(
                          context: context,
                          initialTime: selectedTime,
                        );
                        if (picked != null) {
                          setState(() {
                            selectedTime = picked;
                          });
                        }
                      },
                    ),
                    SizedBox(height: 10.h),
                    // Repeat days
                    Text('Repeat', style: TextStyle(fontWeight: FontWeight.bold)),
                    _buildWeekdaySelector(days, setState),
                    SizedBox(height: 10.h),
                    // Label
                    TextField(
                      controller: labelController,
                      decoration: InputDecoration(
                        labelText: 'Label',
                        border: OutlineInputBorder(),
                      ),
                    ),
                  ],
                ),
              ),
              actions: [
                TextButton(
                  onPressed: () => Navigator.of(context).pop(),
                  child: Text('Cancel'),
                ),
                TextButton(
                  onPressed: () {
                    _addAlarm(
                      selectedTime,
                      List.from(days),
                      labelController.text.isNotEmpty
                          ? labelController.text
                          : 'Alarm',
                    );
                    Navigator.of(context).pop();
                  },
                  child: Text('Save'),
                ),
              ],
            );
          },
        );
      },
    );
  }

  Widget _buildWeekdaySelector(List<bool> days, StateSetter setState) {
    List<String> dayShortNames = ['M', 'T', 'W', 'T', 'F', 'S', 'S'];
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: List.generate(7, (index) {
        return InkWell(
          onTap: () {
            setState(() {
              days[index] = !days[index];
            });
          },
          child: CircleAvatar(
            radius: 18.r,
            backgroundColor: days[index] ? Colors.blue : Colors.grey[300],
            child: Text(
              dayShortNames[index],
              style: TextStyle(
                color: days[index] ? Colors.white : Colors.black87,
                fontWeight: FontWeight.bold,
              ),
            ),
          ),
        );
      }),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      floatingActionButton: FloatingActionButton(
        onPressed: _showAddAlarmDialog,
        child: Icon(Icons.add),
        tooltip: 'Add Alarm',
      ),
      body: _alarms.isEmpty
          ? Center(
              child: Text(
                'No alarms set',
                style: TextStyle(fontSize: 18.sp, color: Colors.grey),
              ),
            )
          : ListView.builder(
              itemCount: _alarms.length,
              itemBuilder: (context, index) {
                final alarm = _alarms[index];
                return Card(
                  margin: EdgeInsets.symmetric(horizontal: 16.w, vertical: 8.h),
                  child: ListTile(
                    title: Text(
                      alarm.timeString,
                      style: TextStyle(
                        fontSize: 24.sp,
                        fontWeight: FontWeight.bold,
                        color: alarm.isActive ? Colors.black : Colors.grey,
                      ),
                    ),
                    subtitle: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(
                          alarm.repeatDaysString,
                          style: TextStyle(
                            fontSize: 14.sp,
                            color: alarm.isActive ? Colors.black87 : Colors.grey,
                          ),
                        ),
                        Text(
                          alarm.label,
                          style: TextStyle(
                            fontSize: 16.sp,
                            fontWeight: FontWeight.w500,
                            color: alarm.isActive ? Colors.black87 : Colors.grey,
                          ),
                        ),
                      ],
                    ),
                    trailing: Row(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        Switch(
                          value: alarm.isActive,
                          onChanged: (_) => _toggleAlarm(alarm.id),
                        ),
                        IconButton(
                          icon: Icon(Icons.delete, color: Colors.red),
                          onPressed: () => _deleteAlarm(alarm.id),
                        ),
                      ],
                    ),
                  ),
                );
              },
            ),
    );
  }
}