import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import '../../../routes/app_pages.dart';
import '../../../widgets/numpad_nominal_widget.dart';
import '../../../widgets/numpad_pin_widget.dart';
import '../../../widgets/target_celengan_picker.dart';

class RegisterController extends GetxController {
  final namaController = TextEditingController();
  final emailController = TextEditingController();
  final passwordController = TextEditingController();
  final targetCelenganController = TextEditingController();
  final nominalTargetController = TextEditingController();
  final pinController = TextEditingController();
  final confirmPinController = TextEditingController();

  final isPinVisible = false.obs;
  final isConfirmPinVisible = false.obs;
  final isLoading = false.obs;

  String _activeField = '';

  final _auth = FirebaseAuth.instance;
  final _firestore = FirebaseFirestore.instance;

  @override
  void onClose() {
    namaController.dispose();
    emailController.dispose();
    passwordController.dispose();
    targetCelenganController.dispose();
    nominalTargetController.dispose();
    pinController.dispose();
    confirmPinController.dispose();
    super.onClose();
  }

  void togglePinVisibility() => isPinVisible.value = !isPinVisible.value;
  void toggleConfirmPinVisibility() =>
      isConfirmPinVisible.value = !isConfirmPinVisible.value;

  void showTargetPicker(BuildContext context) {
    TargetCelenganPicker.show(
      context,
      selected: targetCelenganController.text.isEmpty
          ? null
          : targetCelenganController.text,
      onSelected: (label) => targetCelenganController.text = label,
    );
  }

  void showNumpad(BuildContext context, String field) {
    _activeField = field;
    final activeCtrl = _getController(field);
    final isPinField = field == 'pin' || field == 'confirmPin';

    if (isPinField) {
      NumpadPinInputWidget.show(
        context,
        controller: activeCtrl,
        onKey: _onNumpadKey,
        onSimpan: () => Get.back(),
        title: field == 'pin' ? 'Masukkan PIN' : 'Ulangi PIN',
      );
    } else {
      NumpadNominalWidget.show(
        context,
        controller: activeCtrl,
        onKey: _onNumpadKey,
        onSimpan: () => Get.back(),
      );
    }
  }

  TextEditingController _getController(String field) {
    if (field == 'pin') return pinController;
    if (field == 'confirmPin') return confirmPinController;
    return nominalTargetController;
  }

  void _onNumpadKey(String key) {
    final ctrl = _getController(_activeField);
    final isPinField = _activeField == 'pin' || _activeField == 'confirmPin';

    if (key == 'del') {
      if (ctrl.text.isNotEmpty)
        ctrl.text = ctrl.text.substring(0, ctrl.text.length - 1);
    } else {
      if (isPinField && ctrl.text.length >= 6) return;
      ctrl.text += key;
    }
  }

  /// Parse nominal dari string seperti "Rp 2.500.000" → 2500000
  int _parseNominal(String raw) {
    final cleaned = raw.replaceAll(RegExp(r'[^0-9]'), '');
    return int.tryParse(cleaned) ?? 0;
  }

  Future<void> simpan() async {
    if (namaController.text.isEmpty ||
        emailController.text.isEmpty ||
        passwordController.text.isEmpty ||
        targetCelenganController.text.isEmpty ||
        nominalTargetController.text.isEmpty ||
        pinController.text.isEmpty ||
        confirmPinController.text.isEmpty) {
      Get.snackbar(
        'Perhatian',
        'Semua field harus diisi!',
        snackPosition: SnackPosition.TOP,
        backgroundColor: Colors.red.shade100,
      );
      return;
    }

    if (pinController.text != confirmPinController.text) {
      Get.snackbar(
        'Perhatian',
        'PIN tidak cocok!',
        snackPosition: SnackPosition.TOP,
        backgroundColor: Colors.red.shade100,
      );
      return;
    }

    try {
      isLoading.value = true;

      // 1. Buat akun di Firebase Auth
      final credential = await _auth.createUserWithEmailAndPassword(
        email: emailController.text.trim(),
        password: passwordController.text.trim(),
      );

      final uid = credential.user!.uid;
      final now = FieldValue.serverTimestamp();

      // 2. Simpan ke collection 'users'
      await _firestore.collection('users').doc(uid).set({
        'email': emailController.text.trim(),
        'password': 'hashed_password', // Hanya placeholder, auth sudah handle
        'createdAt': now,
      });

      // 3. Simpan ke collection 'profil'
      await _firestore.collection('profil').doc(uid).set({
        'userId': uid,
        'nama': namaController.text.trim(),
        'target': targetCelenganController.text.trim(),
        'targetNominal': _parseNominal(nominalTargetController.text),
        'pin': pinController.text,
        'totalSaldo': 0,
        'createdAt': now,
      });

      Get.snackbar(
        'Berhasil',
        'Akun berhasil dibuat!',
        snackPosition: SnackPosition.TOP,
        backgroundColor: Colors.green.shade100,
      );

      Get.offAllNamed(Routes.LOGIN);
    } on FirebaseAuthException catch (e) {
      String message = 'Registrasi gagal.';
      if (e.code == 'email-already-in-use') {
        message = 'Email sudah digunakan.';
      } else if (e.code == 'weak-password') {
        message = 'Password terlalu lemah (min. 6 karakter).';
      } else if (e.code == 'invalid-email') {
        message = 'Format email tidak valid.';
      }

      Get.snackbar(
        'Registrasi Gagal',
        message,
        snackPosition: SnackPosition.TOP,
        backgroundColor: Colors.red.shade100,
      );
    } finally {
      isLoading.value = false;
    }
  }
}