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

class SystemInsetsService {
  SystemInsetsService._();
  static final instance = SystemInsetsService._();
  static const _ch = MethodChannel('com.camelsoft.wanisclient/background');

  Future<double> bottomPadding(BuildContext context) async {
    // fast path: use flutter's insets first
    final mq = MediaQuery.maybeOf(context);
    final mqPad = mq?.viewPadding.bottom ?? 0.0; // safe area (ignores keyboard)
    if (mqPad > 0) return mqPad;

    // android native fallback
    try {
      final res = await _ch.invokeMethod<Map>('get_navbar_metrics');
      final px = (res?['inset_bottom'] ?? res?['height'] ?? 0) as int;
      final dpr = View.of(context).devicePixelRatio;
      return px / dpr; // convert px -> logical
    } catch (_) {
      return 0.0;
    }
  }
}