import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:http/http.dart' as http;
import 'package:shared_preferences/shared_preferences.dart';

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

  @override
  State<TambahIbuHamilPage> createState() => _TambahIbuHamilPageState();
}

class _TambahIbuHamilPageState extends State<TambahIbuHamilPage> {
  final _formKey = GlobalKey<FormState>();

  String? selectedIbuId;
  List<dynamic> listIbu = [];

  final hphtC = TextEditingController();
  final usiaC = TextEditingController();
  final hplC = TextEditingController();
  final tglPersalinanSblmC = TextEditingController();

  final gravidaC = TextEditingController();
  final paraC = TextEditingController();
  final abortusC = TextEditingController();
  final hidupC = TextEditingController();

  // Dropdown Values
  String selectedStatus = "aktif";
  final List<String> listStatus = ['aktif', 'keguguran', 'melahirkan'];

  // Diubah menjadi null agar memicu tampilan Hint
  String? selectedPembiayaan;
  final List<String> listPembiayaan = [
    'JKN',
    'JAMPERSAL',
    'ASURANSI KESEHATAN LAIN',
    'MANDIRI'
  ];

  bool _isSaving = false;
  bool _isLoadingIbu = true;

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

  @override
  void dispose() {
    hphtC.dispose();
    usiaC.dispose();
    hplC.dispose();
    tglPersalinanSblmC.dispose();
    gravidaC.dispose();
    paraC.dispose();
    abortusC.dispose();
    hidupC.dispose();
    super.dispose();
  }

  void _hitungDariHPHT(DateTime hphtDate) {
    final now = DateTime.now();
    final diffDays = now.difference(hphtDate).inDays;
    final minggu = diffDays < 0 ? 0 : (diffDays / 7).floor();
    usiaC.text = minggu.toString();
    final hplDate = hphtDate.add(const Duration(days: 280));
    hplC.text = hplDate.toIso8601String().split("T").first;
  }

  Future<void> _fetchIbu() async {
    try {
      final prefs = await SharedPreferences.getInstance();
      final dynamic rawDusunId = prefs.get("dusun_id");
      final String userDusunId = rawDusunId?.toString() ?? "";

      final url = Uri.parse(
          "http://ta.myhost.id/E31230549/mposyandu_api/ibu/get_ibu.php?dusun_id=$userDusunId");

      final response = await http.get(url);
      final data = json.decode(response.body);

      if (data["success"] == true) {
        setState(() {
          listIbu = data["data"] ?? [];
          _isLoadingIbu = false;
        });
      } else {
        if (mounted) setState(() => _isLoadingIbu = false);
      }
    } catch (e) {
      if (mounted) setState(() => _isLoadingIbu = false);
    }
  }

  Future<void> _simpan() async {
    if (!_formKey.currentState!.validate()) return;

    if (selectedIbuId == null) {
      _showSnackBar("Ibu wajib dipilih");
      return;
    }

    setState(() => _isSaving = true);
    try {
      final url = Uri.parse(
          "http://ta.myhost.id/E31230549/mposyandu_api/ibu_hamil/tambah_ibu_hamil.php");

      // Data dikirim dengan pengaman ?? "" agar jika kosong tetap terkirim sebagai string kosong
      final response = await http.post(url, body: {
        "ibu_id": selectedIbuId!,
        "hpht": hphtC.text.trim(),
        "hpl": hplC.text.trim(),
        "tanggal_persalinan_sebelumnya": tglPersalinanSblmC.text.trim(),
        "gravida": gravidaC.text.trim(),
        "para": paraC.text.trim(),
        "abortus": abortusC.text.trim(),
        "hidup": hidupC.text.trim(),
        "status": selectedStatus,
        "pembiayaan": selectedPembiayaan ?? "",
      });

      final data = json.decode(response.body);
      if (data["success"] == true) {
        _showSnackBar("Data berhasil disimpan");
        if (mounted) Navigator.pop(context, true);
      } else {
        _showSnackBar(data["message"] ?? "Gagal menyimpan");
      }
    } catch (e) {
      _showSnackBar("Gagal: $e");
    } finally {
      if (mounted) setState(() => _isSaving = false);
    }
  }

  void _showSnackBar(String msg) {
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(content: Text(msg, style: GoogleFonts.poppins(fontSize: 12))),
    );
  }

  Future<void> _pickHPHT() async {
    final picked = await showDatePicker(
      context: context,
      firstDate: DateTime(2000),
      lastDate: DateTime.now(),
      initialDate: DateTime.now(),
    );
    if (picked != null) {
      hphtC.text = picked.toIso8601String().split("T").first;
      _hitungDariHPHT(picked);
    }
  }

  Future<void> _pickTanggalPersalinan() async {
    final picked = await showDatePicker(
      context: context,
      firstDate: DateTime(1990),
      lastDate: DateTime.now(),
      initialDate: DateTime.now(),
    );
    if (picked != null) {
      tglPersalinanSblmC.text = picked.toIso8601String().split("T").first;
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.blue,
        foregroundColor: Colors.white,
        title: Text(
          "",
          style: GoogleFonts.poppins(fontSize: 14, fontWeight: FontWeight.w600),
        ),
      ),
      backgroundColor: const Color(0xfff4f6fb),
      body: Center(
        child: SingleChildScrollView(
          padding: const EdgeInsets.all(16),
          child: ConstrainedBox(
            constraints: const BoxConstraints(maxWidth: 420),
            child: Container(
              padding: const EdgeInsets.all(24),
              decoration: BoxDecoration(
                color: Colors.white,
                borderRadius: BorderRadius.circular(20),
                boxShadow: const [
                  BoxShadow(
                      blurRadius: 16,
                      color: Colors.black12,
                      offset: Offset(0, 8))
                ],
              ),
              child: Form(
                key: _formKey,
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Center(
                      child: Text(
                        "Tambah Data Ibu Hamil",
                        style: GoogleFonts.poppins(
                            fontSize: 18, fontWeight: FontWeight.w700),
                      ),
                    ),
                    const SizedBox(height: 24),
                    _isLoadingIbu
                        ? const Center(child: CircularProgressIndicator())
                        : DropdownButtonFormField<String>(
                            isExpanded: true,
                            value: selectedIbuId,
                            hint: Text("Pilih Ibu",
                                style: GoogleFonts.poppins(fontSize: 12)),
                            style: GoogleFonts.poppins(
                                fontSize: 12, color: Colors.black),
                            decoration: _decoration("Pilih Ibu"),
                            items:
                                listIbu.map<DropdownMenuItem<String>>((item) {
                              return DropdownMenuItem<String>(
                                value: item["id"].toString(),
                                child: Text(
                                    "${item["nama"]} (${item["nama_suami"] ?? '_'})",
                                    overflow: TextOverflow.ellipsis,
                                    style: GoogleFonts.poppins(fontSize: 12)),
                              );
                            }).toList(),
                            onChanged: (v) => setState(() => selectedIbuId = v),
                            validator: (v) =>
                                v == null ? "Ibu wajib dipilih" : null,
                          ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: hphtC,
                      readOnly: true,
                      onTap: _pickHPHT,
                      style: GoogleFonts.poppins(fontSize: 12),
                      decoration: _decoration("HPHT").copyWith(
                        suffixIcon: const Icon(Icons.calendar_today,
                            size: 18, color: Colors.black),
                      ),
                      validator: (v) => v!.isEmpty ? "HPHT wajib diisi" : null,
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: usiaC,
                      readOnly: true,
                      style: GoogleFonts.poppins(fontSize: 12),
                      decoration: _decoration("Usia Kehamilan (Minggu)"),
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: hplC,
                      readOnly: true,
                      style: GoogleFonts.poppins(fontSize: 12),
                      decoration: _decoration("HPL (Perkiraan Lahir)"),
                    ),
                    const SizedBox(height: 16),
                    // Tanggal Persalinan Sebelumnya (Opsional)
                    TextFormField(
                      controller: tglPersalinanSblmC,
                      readOnly: true,
                      onTap: _pickTanggalPersalinan,
                      style: GoogleFonts.poppins(fontSize: 12),
                      decoration: _decoration(
                              "Tanggal Persalinan Sebelumnya (Opsional)")
                          .copyWith(
                        suffixIcon: const Icon(Icons.calendar_today,
                            size: 18, color: Colors.black),
                      ),
                    ),
                    const SizedBox(height: 16),
                    _input("Gravida (G)", gravidaC,
                        keyboard: TextInputType.number),
                    const SizedBox(height: 16),
                    _input("Para (P)", paraC, keyboard: TextInputType.number),
                    const SizedBox(height: 16),
                    _input("Abortus (A)", abortusC,
                        keyboard: TextInputType.number),
                    const SizedBox(height: 16),
                    _input("Hidup", hidupC, keyboard: TextInputType.number),
                    const SizedBox(height: 16),

                    // DROPDOWN PEMBIAYAAN (Opsional)
                    DropdownButtonFormField<String>(
                      isExpanded: true,
                      value: selectedPembiayaan,
                      hint: Text("Pilih Pembiayaan (Opsional)",
                          style: GoogleFonts.poppins(fontSize: 12)),
                      decoration: _decoration("Pembiayaan"),
                      style: GoogleFonts.poppins(
                          fontSize: 12, color: Colors.black),
                      items: listPembiayaan.map((val) {
                        return DropdownMenuItem(
                          value: val,
                          child: Text(val,
                              style: GoogleFonts.poppins(fontSize: 12)),
                        );
                      }).toList(),
                      onChanged: (v) => setState(() => selectedPembiayaan = v),
                      // Validator dihapus agar boleh kosong
                    ),

                    const SizedBox(height: 16),
                    // DROPDOWN STATUS
                    DropdownButtonFormField<String>(
                      value: selectedStatus,
                      decoration: _decoration("Status"),
                      style: GoogleFonts.poppins(
                          fontSize: 12, color: Colors.black),
                      items: listStatus.map((val) {
                        return DropdownMenuItem(
                          value: val,
                          child: Text(val.toUpperCase(),
                              style: GoogleFonts.poppins(fontSize: 12)),
                        );
                      }).toList(),
                      onChanged: (v) => setState(() => selectedStatus = v!),
                    ),
                    const SizedBox(height: 28),
                    SizedBox(
                      width: double.infinity,
                      height: 50,
                      child: OutlinedButton(
                        onPressed: _isSaving ? null : _simpan,
                        style: OutlinedButton.styleFrom(
                          side: const BorderSide(
                              color: Colors.blueAccent, width: 2),
                          shape: const StadiumBorder(),
                        ),
                        child: _isSaving
                            ? const SizedBox(
                                height: 20,
                                width: 20,
                                child:
                                    CircularProgressIndicator(strokeWidth: 2))
                            : Text("Simpan Data Ibu Hamil",
                                style: GoogleFonts.poppins(
                                    fontWeight: FontWeight.bold,
                                    fontSize: 14,
                                    color: Colors.blueAccent)),
                      ),
                    )
                  ],
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }

  Widget _input(String label, TextEditingController c,
      {TextInputType keyboard = TextInputType.text}) {
    return TextFormField(
      controller: c,
      keyboardType: keyboard,
      style: GoogleFonts.poppins(fontSize: 12),
      decoration: _decoration(label),
      validator: (v) => v!.isEmpty ? "$label wajib diisi" : null,
    );
  }

  InputDecoration _decoration(String label) {
    return InputDecoration(
      filled: true,
      fillColor: Colors.white,
      labelText: label,
      labelStyle: GoogleFonts.poppins(fontSize: 12),
      errorStyle: GoogleFonts.poppins(fontSize: 10),
      contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
      border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
    );
  }
}