import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:insparkspokalen_ui/services/backend/activityService.dart';
import 'package:insparkspokalen_ui/models/activityModel.dart';

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


  @override
  State<AdminCalendarPage> createState() => AdminCalendarPageState();
}


class AdminCalendarPageState extends State<AdminCalendarPage> {
  List<ActivityModel> aktiviteter = [];


  @override
  void initState() {
    super.initState();
    _fetchActivities();
  }


  void _fetchActivities() async {
    try {
      List<ActivityModel> fetchedActivities =
          await ActivityService().fetchActivities();
      fetchedActivities.sort(
        (a, b) => a.date.compareTo(b.date),
      ); // Sortering: nyast först
      setState(() {
        aktiviteter = fetchedActivities;
      });
    } catch (e) {
      print("Error fetching activities: $e");
    }
  }


  void _deleteActivity(ActivityModel activity) async {
    try {
      print("Försöker ta bort aktivitet med ID: ${activity.id}");
      await ActivityService().deleteActivity(activity);
      setState(() {
        aktiviteter.remove(activity);
      });
      print("Aktivitet borttagen");
    } catch (e) {
      print("Error deleting activity: $e");
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text("Kunde inte ta bort aktiviteten.")),
      );
    }
  }


  void _confirmDelete(BuildContext context, ActivityModel activity) {
    showDialog(
      context: context,
      builder:
          (context) => AlertDialog(
            title: const Text("Ta bort aktivitet"),
            content: const Text(
              "Är du säker på att du vill ta bort denna aktivitet?",
            ),
            actions: [
              TextButton(
                onPressed: () => Navigator.of(context).pop(),
                child: const Text("Avbryt"),
              ),
              TextButton(
                onPressed: () {
                  Navigator.of(context).pop();
                  _deleteActivity(activity);
                },
                child: const Text(
                  "Ta bort",
                  style: TextStyle(color: Colors.red),
                ),
              ),
            ],
          ),
    );
  }


  DateTime valdDatumTid = DateTime.now();
  final TextEditingController _slutTidController = TextEditingController();
  final TextEditingController _beskrivningController = TextEditingController();


  void _showDialogCalendar() {
    print("Dialogen för kalendern öppnas!");
    final titleController = TextEditingController();
    final placeController = TextEditingController();
    _slutTidController.clear();
    _beskrivningController.clear();
    valdDatumTid = DateTime.now();


    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      builder:
          (context) => StatefulBuilder(
            builder:
                (context, setModalState) => Padding(
                  padding: MediaQuery.of(context).viewInsets,
                  child: Container(
                    padding: const EdgeInsets.all(16),
                    child: Wrap(
                      children: [
                        const Text(
                          "Lägg till aktivitet",
                          style: TextStyle(
                            fontSize: 20,
                            fontWeight: FontWeight.bold,
                          ),
                        ),
                        const SizedBox(height: 16),
                        TextField(
                          controller: titleController,
                          decoration: const InputDecoration(labelText: 'Titel'),
                        ),
                        TextField(
                          controller: placeController,
                          decoration: const InputDecoration(labelText: 'Plats'),
                        ),
                        const SizedBox(height: 16),
                        const Text(
                          "Välj startdatum och tid:",
                          style: TextStyle(fontWeight: FontWeight.bold),
                        ),
                        SizedBox(
                          height: 200,
                          child: CupertinoDatePicker(
                            initialDateTime: valdDatumTid,
                            mode: CupertinoDatePickerMode.dateAndTime,
                            use24hFormat: true,
                            onDateTimeChanged: (DateTime newDateTime) {
                              setModalState(() => valdDatumTid = newDateTime);
                            },
                          ),
                        ),
                        const SizedBox(height: 16),
                        TextField(
                          controller: _slutTidController,
                          decoration: const InputDecoration(
                            labelText: 'Sluttid (valfritt)',
                          ),
                        ),
                        const SizedBox(height: 16),
                        TextField(
                          controller: _beskrivningController,
                          decoration: const InputDecoration(
                            labelText: 'Beskrivning (valfritt)',
                          ),
                          maxLines: 3,
                        ),
                        const SizedBox(height: 16),
                        ElevatedButton(
                          style: ElevatedButton.styleFrom(
                            backgroundColor: Colors.white,
                            foregroundColor: Colors.black,
                            elevation: 2,
                          ),
                          onPressed: () {
                            final titel = titleController.text;
                            final plats = placeController.text;
                            final slutTid =
                                _slutTidController.text.isNotEmpty
                                    ? _slutTidController.text
                                    : null;
                            final beskrivning =
                                _beskrivningController.text.isNotEmpty
                                    ? _beskrivningController.text
                                    : null;


                            if (titel.isNotEmpty && plats.isNotEmpty) {
                              final newActivity = ActivityModel(
                                name: titel,
                                startTime:
                                    "${valdDatumTid.hour.toString().padLeft(2, '0')}:${valdDatumTid.minute.toString().padLeft(2, '0')}",
                                place: plats,
                                description: beskrivning,
                                date: valdDatumTid,
                                endTime: slutTid,
                              );


                              setState(() {
                                aktiviteter.add(newActivity);
                                aktiviteter.sort(
                                  (a, b) => b.date.compareTo(a.date),
                                ); // Behåll sortering efter ny aktivitet
                              });


                              ActivityService().createActivity(newActivity);


                              Navigator.pop(context);
                            }
                          },
                          child: const Text("Lägg till aktivitet"),
                        ),
                      ],
                    ),
                  ),
                ),
          ),
    );
  }


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: const Color(0xFF2E2E2E),
      appBar: AppBar(
        backgroundColor: const Color(0xFF2E2E2E),
        centerTitle: true,
        title: const SizedBox.shrink(),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _showDialogCalendar,
        backgroundColor: Colors.white,
        foregroundColor: Colors.black,
        child: const Icon(Icons.add),
      ),


      body: ListView.builder(
        itemCount: aktiviteter.length,
        itemBuilder: (context, index) {
          final aktivitet = aktiviteter[index];


          final datumStr = DateFormat('yyyy-MM-dd').format(aktivitet.date);
          final startTidStr = aktivitet.startTime;
          final slutTidStr = aktivitet.endTime ?? "Sent";


          return Card(
            margin: const EdgeInsets.symmetric(vertical: 8, horizontal: 16),
            child: ListTile(
              leading: const Icon(Icons.event, color: Color(0xFFDAA520)),
              title: Text(aktivitet.name),
              subtitle: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Row(
                    children: [
                      const Icon(Icons.location_on, color: Colors.grey),
                      const SizedBox(width: 4),
                      Text(
                        aktivitet.place,
                        style: const TextStyle(color: Colors.grey),
                      ),
                    ],
                  ),
                  Row(
                    children: [
                      const Icon(Icons.calendar_today, color: Colors.grey),
                      const SizedBox(width: 4),
                      Text(
                        "$datumStr · $startTidStr - $slutTidStr",
                        style: const TextStyle(color: Colors.grey),
                      ),
                    ],
                  ),
                  if (aktivitet.description != null)
                    const Text(
                      "Tryck för beskrivning",
                      style: TextStyle(
                        color: Colors.blue,
                        fontStyle: FontStyle.italic,
                      ),
                    ),
                ],
              ),
              trailing: IconButton(
                icon: const Icon(Icons.delete, color: Colors.red),
                onPressed: () {
                  _confirmDelete(context, aktivitet);
                },
              ),
              onTap: () {
                if (aktivitet.description != null) {
                  showDialog(
                    context: context,
                    builder:
                        (context) => AlertDialog(
                          title: Text(aktivitet.name),
                          content: Text(aktivitet.description!),
                          actions: [
                            TextButton(
                              onPressed: () => Navigator.pop(context),
                              child: const Text("Stäng"),
                            ),
                          ],
                        ),
                  );
                }
              },
            ),
          );
        },
      ),
    );
  }
}