import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:cloud_firestore/cloud_firestore.dart'; // Import library Firestore

class AlertScreen extends StatefulWidget {
  @override
  _AlertScreenState createState() => _AlertScreenState();
}

class _AlertScreenState extends State<AlertScreen> {
  String? selectedPhoneNumber; // Menggunakan tipe data String?
  TextEditingController messageController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Communication Form"),
      ),
      body: Padding(
        padding: EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            StreamBuilder(
              stream: FirebaseFirestore.instance.collection('Penghuni').snapshots(),
              builder: (context, AsyncSnapshot<QuerySnapshot> snapshot) {
                if (!snapshot.hasData) {
                  return CircularProgressIndicator();
                } else {
                  List<String> phoneNumbers = snapshot.data!.docs.map((doc) => doc['nomortelepon'] as String).toSet().toList();

                  // Tambahkan nilai default jika dropdown kosong
                  if (selectedPhoneNumber == null || selectedPhoneNumber!.isEmpty) {
                    selectedPhoneNumber = phoneNumbers.isNotEmpty ? phoneNumbers.first : null;
                  }

                  return DropdownButtonFormField(
                    value: selectedPhoneNumber,
                    items: phoneNumbers.map((phoneNumber) {
                      return DropdownMenuItem(
                        value: phoneNumber,
                        child: Text(phoneNumber),
                      );
                    }).toList(),
                    onChanged: (value) {
                      setState(() {
                        selectedPhoneNumber = value as String?;
                      });
                    },
                    decoration: InputDecoration(
                      labelText: 'Select Phone Number',
                    ),
                  );
                }
              },
            ),
            SizedBox(height: 16.0),
            TextFormField(
              controller: messageController,
              decoration: InputDecoration(
                labelText: 'Enter Message',
              ),
            ),
            SizedBox(height: 16.0),
            ElevatedButton(
              onPressed: () {
                _sendMessage();
              },
              child: Text('Send Message'),
            ),
            SizedBox(height: 8.0),
            ElevatedButton(
              onPressed: () {
                _makePhoneCall();
              },
              child: Text('Make Phone Call'),
            ),
          ],
        ),
      ),
    );
  }

  void _sendMessage() async {
    if (selectedPhoneNumber != null && selectedPhoneNumber!.isNotEmpty) { // Pengecekan null
      String message = messageController.text.isNotEmpty ? messageController.text : "Contoh pesan yang ingin Anda kirim";
      String smsUrl = 'sms:$selectedPhoneNumber?body=$message';

      try {
        await launch(smsUrl);
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Pesan terkirim ke $selectedPhoneNumber')),
        );
      } catch (e) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Gagal mengirim pesan')),
        );
      }
    } else {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Pilih nomor telepon terlebih dahulu')),
      );
    }
  }

  void _makePhoneCall() {
    if (selectedPhoneNumber != null && selectedPhoneNumber!.isNotEmpty) { // Pengecekan null
      String telUrl = 'tel:$selectedPhoneNumber';
      launch(telUrl);
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Menelepon $selectedPhoneNumber')),
      );
    } else {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Pilih nomor telepon terlebih dahulu')),
      );
    }
  }
}

void main() {
  runApp(MaterialApp(
    home: AlertScreen(),
  ));
}