import 'package:flutter/services.dart';
import 'package:flutter/material.dart';
import '../features/call/call_page.dart';

class CallService {
  static const MethodChannel _channel = MethodChannel('call_service');
  static String? currentPhoneNumber;

  CallService() {
    _channel.setMethodCallHandler((call) async {
      if (call.method == "callStateChanged") {
        final state = call.arguments["state"] as String;
        final phoneNumber = call.arguments["phoneNumber"] as String;
        if (state == "dialing" || state == "active") {
          Navigator.push(
            navigatorKey.currentContext!,
            MaterialPageRoute(
              builder: (context) => CallPage(
                displayName: phoneNumber, // Replace with contact lookup if available
                phoneNumber: phoneNumber,
                thumbnail: null,
              ),
            ),
          );
        } else if (state == "disconnected") {
          Navigator.pop(navigatorKey.currentContext!);
        }
      }
    });
  }

  // Add a GlobalKey for Navigator
  static final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();

  Future<void> makeGsmCall(
    BuildContext context, {
    required String phoneNumber,
    String? displayName,
    Uint8List? thumbnail,
  }) async {
    try {
      currentPhoneNumber = phoneNumber;
      final result = await _channel.invokeMethod('makeGsmCall', {"phoneNumber": phoneNumber});
      if (result["status"] == "calling") {
        // CallPage will be shown via CallConnectionService callback
      } else if (result["status"] == "pending_default_dialer") {
        print("Waiting for user to set app as default dialer");
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text("Please set this app as your default dialer to proceed")),
        );
      }
    } catch (e) {
      print("Error making call: $e");
      rethrow;
    }
  }

  Future<void> hangUpCall(BuildContext context) async {
    try {
      final result = await _channel.invokeMethod('hangUpCall');
      if (result["status"] == "ended") {
        Navigator.pop(context);
      }
    } catch (e) {
      print("Error hanging up call: $e");
      rethrow;
    }
  }
}