import 'dart:io';

import 'package:flutter/services.dart';
import 'package:matrix/matrix.dart';

/// The Android foreground service that keeps a call going with the app in
/// the background (android/.../CallService.kt): without it Android cuts a
/// backgrounded app off from the microphone and camera, and screen sharing
/// can't start at all. Its notification shows the call, opens it and hangs
/// up. Nothing on other platforms.
class CallService {
  static const _channel = MethodChannel('warp/call_service');

  /// Hang up from the notification, and tapping it.
  static void listen({
    required void Function() onHangUp,
    required void Function() onOpen,
  }) {
    if (!Platform.isAndroid) return;
    _channel.setMethodCallHandler((call) async {
      switch (call.method) {
        case 'hangUp':
          onHangUp();
        case 'openCall':
          onOpen();
      }
    });
  }

  /// Starts the service, or changes what it declares: the camera while it
  /// is on, the screen while it is shared. False if Android refused.
  static Future<bool> update({
    required String title,
    required DateTime startedAt,
    required bool camera,
    required bool screen,
  }) async {
    if (!Platform.isAndroid) return true;
    try {
      return await _channel.invokeMethod<bool>('update', {
            'title': title,
            'startedAt': startedAt.millisecondsSinceEpoch,
            'camera': camera,
            'screen': screen,
          }) ??
          false;
    } catch (e) {
      Logs().w('Could not start the call service', e);
      return false;
    }
  }

  static Future<void> stop() async {
    if (!Platform.isAndroid) return;
    try {
      await _channel.invokeMethod<void>('stop');
    } catch (e) {
      Logs().w('Could not stop the call service', e);
    }
  }
}