import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:firebase_database/firebase_database.dart';
import 'bottom_navigation.dart';

class AturJadwal1Screen extends StatefulWidget {
  const AturJadwal1Screen({super.key});

  @override
  State<AturJadwal1Screen> createState() => _AturJadwal1ScreenState();
}

class _AturJadwal1ScreenState extends State<AturJadwal1Screen> {
  final _namaObatController = TextEditingController();
  final _jumlahObatController = TextEditingController();

  bool isJamManual = true;
  int dosisCount = 1;
  List<TimeOfDay> manualTimes = [];
  List<TimeOfDay> dosisTimes = [
    TimeOfDay(hour: 6, minute: 0),
    TimeOfDay(hour: 14, minute: 0),
    TimeOfDay(hour: 22, minute: 0),
    TimeOfDay(hour: 0, minute: 0),
  ];

  final dbRef = FirebaseDatabase.instance.ref();

  bool _isFirstEntry =
      true; // Untuk cek apakah jadwal pertama sudah ada obat dan jumlah

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

  Future<void> _checkExistingObatJumlah() async {
    try {
      final obatSnap = await dbRef.child("jadwal/kotak1/obat1").get();
      final jumlahSnap = await dbRef.child("jadwal/kotak1/jumlahObat").get();

      if (obatSnap.exists &&
          obatSnap.value != null &&
          obatSnap.value.toString().trim().isNotEmpty &&
          jumlahSnap.exists &&
          jumlahSnap.value != null &&
          jumlahSnap.value.toString().trim().isNotEmpty) {
        // Jika data ada, artinya jadwal pertama sudah ada obat dan jumlah obat
        setState(() {
          _isFirstEntry = false;
          // Set controller agar user tetap melihat data yang sudah ada (optional)
          _namaObatController.text = obatSnap.value.toString();
          _jumlahObatController.text = jumlahSnap.value.toString();
        });
      }
    } catch (e) {
      print('Error checking existing obat/jumlah: $e');
    }
  }

  void simpanData() async {
    final user = FirebaseAuth.instance.currentUser;
    if (user == null) return;

    final namaObat = _namaObatController.text.trim();
    final jumlahObatText = _jumlahObatController.text.trim();

    if (_isFirstEntry) {
      if (namaObat.isEmpty || jumlahObatText.isEmpty) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(
            content: Text(
              "Lengkapi data nama obat dan jumlah obat terlebih dahulu",
            ),
          ),
        );
        return;
      }

      if (int.tryParse(jumlahObatText) == null) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text("Jumlah obat harus berupa angka")),
        );
        return;
      }
    }

    final int inputJumlahObat = int.tryParse(jumlahObatText) ?? 0;
    final times =
        isJamManual ? manualTimes : dosisTimes.take(dosisCount).toList();
    final DatabaseReference kotakRef = dbRef.child("jadwal/kotak1");

    try {
      final snapshot = await kotakRef.get();
      int index = 0;
      final existingTimes = <String>[];

      for (final child in snapshot.children) {
        if (child.key != 'jumlahObat' &&
            child.key != 'obat1' &&
            child.key != 'userId') {
          index++;
          final jam = child.child('jam').value;
          final menit = child.child('menit').value;
          if (jam != null && menit != null) {
            existingTimes.add('$jam:$menit');
          }
        }
      }

      if (index + times.length > 4) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Maksimal 4 jadwal diperbolehkan')),
        );
        return;
      }

      int existingJumlahObat = 0;
      final jumlahSnap = snapshot.child('jumlahObat');
      if (jumlahSnap.exists && jumlahSnap.value != null) {
        existingJumlahObat =
            (jumlahSnap.value is int)
                ? jumlahSnap.value as int
                : int.tryParse(jumlahSnap.value.toString()) ?? 0;
      }

      int totalJumlahObat =
          _isFirstEntry ? inputJumlahObat : existingJumlahObat;

      if (_isFirstEntry && totalJumlahObat > 15) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Jumlah obat maksimal 15')),
        );
        return;
      }

      for (final time in times) {
        final newTime = "${time.hour}:${time.minute}";
        if (existingTimes.contains(newTime)) {
          ScaffoldMessenger.of(
            context,
          ).showSnackBar(const SnackBar(content: Text('Jadwal ini sudah ada')));
          return;
        }
      }

      // Simpan data utama (hanya sekali)
      if (_isFirstEntry) {
        await kotakRef.child('obat1').set(namaObat);
        await kotakRef.child('jumlahObat').set(inputJumlahObat);
        await kotakRef.child('userId').set(user.uid); // dipindah ke sini
      }

      // Simpan jadwal jam dan menit saja
      for (final time in times) {
        await kotakRef.child('$index').set({
          'jam': time.hour,
          'menit': time.minute,
        });
        index++;
      }

      ScaffoldMessenger.of(
        context,
      ).showSnackBar(const SnackBar(content: Text('Jadwal berhasil disimpan')));
      Navigator.pop(context);
    } catch (e) {
      print('Gagal menyimpan data: $e');
      ScaffoldMessenger.of(
        context,
      ).showSnackBar(const SnackBar(content: Text('Gagal menyimpan jadwal')));
    }
  }

  Future<void> pilihJamManual() async {
    if (manualTimes.length >= 4) return;

    TimeOfDay? picked = await showTimePicker(
      context: context,
      initialTime: TimeOfDay.now(),
    );
    if (picked != null) {
      setState(() {
        manualTimes.add(picked);
      });
    }
  }

  Future<void> ubahJamDosis(int index) async {
    TimeOfDay? picked = await showTimePicker(
      context: context,
      initialTime: dosisTimes[index],
    );
    if (picked != null) {
      setState(() {
        dosisTimes[index] = picked;
      });
    }
  }

  Widget buildInputField(
    String label,
    TextEditingController controller, {
    bool isNumber = false,
  }) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(label),
        SizedBox(height: 6),
        TextField(
          controller: controller,
          keyboardType: isNumber ? TextInputType.number : TextInputType.text,
          decoration: InputDecoration(
            border: OutlineInputBorder(),
            contentPadding: EdgeInsets.symmetric(horizontal: 12, vertical: 10),
          ),
        ),
        SizedBox(height: 12),
      ],
    );
  }

  Widget buildManualTimePicker() {
    return Column(
      children: [
        for (int i = 0; i < manualTimes.length; i++)
          ListTile(
            title: Text(manualTimes[i].format(context)),
            trailing: IconButton(
              icon: Icon(Icons.delete),
              onPressed: () => setState(() => manualTimes.removeAt(i)),
            ),
          ),
        if (manualTimes.length < 4)
          ElevatedButton(onPressed: pilihJamManual, child: Text('Tambah Jam')),
      ],
    );
  }

  Widget buildDosisTimePicker() {
    return Column(
      children: [
        Wrap(
          spacing: 10,
          children:
              [1, 2, 3, 4].map((e) {
                return ChoiceChip(
                  label: Text('Obat ${e}x1'),
                  selected: dosisCount == e,
                  onSelected: (_) => setState(() => dosisCount = e),
                );
              }).toList(),
        ),
        for (int i = 0; i < dosisCount; i++)
          ListTile(
            title: Text(dosisTimes[i].format(context)),
            trailing: IconButton(
              icon: Icon(Icons.edit),
              onPressed: () => ubahJamDosis(i),
            ),
          ),
      ],
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Color(0xFF3FA535),
      body: Column(
        children: [
          SafeArea(
            child: Padding(
              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
              child: Row(
                children: [
                  IconButton(
                    icon: Icon(Icons.arrow_back, color: Colors.white),
                    onPressed: () => Navigator.pop(context),
                  ),
                  SizedBox(width: 8),
                  Text(
                    "Atur Jadwal Obat",
                    style: TextStyle(
                      color: Colors.white,
                      fontSize: 20,
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                ],
              ),
            ),
          ),
          Expanded(
            child: Container(
              width: double.infinity,
              padding: EdgeInsets.all(16),
              decoration: BoxDecoration(
                color: Colors.white,
                borderRadius: BorderRadius.only(
                  topLeft: Radius.circular(30),
                  topRight: Radius.circular(30),
                ),
              ),
              child: SingleChildScrollView(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    if (_isFirstEntry) ...[
                      buildInputField("Masukan Nama Obat", _namaObatController),
                      buildInputField(
                        "Masukan Jumlah Obat (Maksimal 15 Obat)",
                        _jumlahObatController,
                        isNumber: true,
                      ),
                    ] else ...[
                      Padding(
                        padding: const EdgeInsets.symmetric(vertical: 8),
                        child: Text(
                          "Nama obat dan jumlah obat sudah ada. Tidak perlu mengisi ulang.",
                          style: TextStyle(
                            color: const Color.fromARGB(255, 245, 5, 13),
                            fontWeight: FontWeight.bold,
                          ),
                        ),
                      ),
                      buildInputField(
                        "Nama Obat",
                        _namaObatController..text = _namaObatController.text,
                        isNumber: false,
                      ),
                      buildInputField(
                        "Jumlah Obat",
                        _jumlahObatController
                          ..text = _jumlahObatController.text,
                        isNumber: true,
                      ),
                    ],
                    SizedBox(height: 10),
                    Text(
                      "Pilih Aturan Jam:",
                      style: TextStyle(fontWeight: FontWeight.bold),
                    ),
                    Row(
                      children: [
                        Expanded(
                          child: ElevatedButton(
                            onPressed: () => setState(() => isJamManual = true),
                            style: ElevatedButton.styleFrom(
                              backgroundColor:
                                  isJamManual ? Colors.green : Colors.white,
                              foregroundColor:
                                  isJamManual ? Colors.white : Colors.green,
                              side: BorderSide(color: Colors.green),
                            ),
                            child: Text("Jam Manual"),
                          ),
                        ),
                        SizedBox(width: 8),
                        Expanded(
                          child: ElevatedButton(
                            onPressed:
                                () => setState(() => isJamManual = false),
                            style: ElevatedButton.styleFrom(
                              backgroundColor:
                                  !isJamManual ? Colors.green : Colors.white,
                              foregroundColor:
                                  !isJamManual ? Colors.white : Colors.green,
                              side: BorderSide(color: Colors.green),
                            ),
                            child: Text("Jam Dosis"),
                          ),
                        ),
                      ],
                    ),
                    SizedBox(height: 16),
                    isJamManual
                        ? buildManualTimePicker()
                        : buildDosisTimePicker(),
                    SizedBox(height: 20),
                    Center(
                      child: ElevatedButton(
                        onPressed: simpanData,
                        style: ElevatedButton.styleFrom(
                          backgroundColor: Colors.green,
                        ),
                        child: const Text(
                          "Simpan",
                          style: TextStyle(
                            color: Color.fromARGB(255, 255, 255, 255),
                            fontWeight: FontWeight.bold,
                          ),
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),
        ],
      ),
      bottomNavigationBar: BottomNavigationBar(
        currentIndex: 0, // sesuaikan dengan index aktif halaman sekarang
        type: BottomNavigationBarType.fixed,
        selectedItemColor: const Color(0xFF3FA535),
        unselectedItemColor: Colors.grey.shade600,
        showUnselectedLabels: true,
        selectedLabelStyle: const TextStyle(
          fontWeight: FontWeight.bold,
          fontSize: 14,
        ),
        unselectedLabelStyle: const TextStyle(
          fontWeight: FontWeight.normal,
          fontSize: 12,
        ),
        elevation: 8,
        backgroundColor: Colors.white,
        iconSize: 28,
        onTap: (index) {
          switch (index) {
            case 0:
              Navigator.pushReplacement(
                context,
                MaterialPageRoute(
                  builder: (_) => MainNavigation(currentIndex: 0),
                ),
              );
              break;
            case 1:
              Navigator.pushReplacement(
                context,
                MaterialPageRoute(
                  builder: (_) => MainNavigation(currentIndex: 1),
                ),
              );
              break;
            case 2:
              Navigator.pushReplacement(
                context,
                MaterialPageRoute(
                  builder: (_) => MainNavigation(currentIndex: 2),
                ),
              );
              break;
            case 3:
              Navigator.pushReplacement(
                context,
                MaterialPageRoute(
                  builder: (_) => MainNavigation(currentIndex: 3),
                ),
              );
              break;
          }
        },
        items: const [
          BottomNavigationBarItem(
            icon: Icon(Icons.home_outlined),
            activeIcon: Icon(Icons.home),
            label: 'Home',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.history_outlined),
            activeIcon: Icon(Icons.history),
            label: 'History',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.notifications_outlined),
            activeIcon: Icon(Icons.notifications),
            label: 'Notification',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.person_outline),
            activeIcon: Icon(Icons.person),
            label: 'Account',
          ),
        ],
      ),

      //bottomNavigationBar: MainNavigation(currentIndex: ),
    );
  }
}