import 'dart:developer';
import 'dart:io';
import 'package:flutter/material.dart' as material;
import 'package:flutter/src/widgets/navigator.dart';
import 'package:flutter/src/widgets/routes.dart';
import 'package:flutter/src/widgets/framework.dart';

class MyWillPopScope extends StatefulWidget {
  const MyWillPopScope({
    super.key,
    required this.child,
    required this.onWillPop,
  });

  final Widget child;
  final WillPopCallback onWillPop;

  @override
  State<MyWillPopScope> createState() => _WillPopScopeState();
}

class _WillPopScopeState extends State<MyWillPopScope> {
  double startDx = 0;
  double endDx = 0;
  @override
  Widget build(BuildContext context) {
    if (Platform.isIOS) {
      return material.Listener(
        onPointerUp: (details) async {
          bool safe1 = startDx < 30;
          bool safe2 = endDx < 30;
          log(
            "\n按下手指位置(${safe1 ? '安全区' : '非安全区'}) => $startDx"
            "\n手指抬起位置(${safe2 ? '安全区' : '非安全区'}) => $endDx",
            name: "WillPopScope",
          );
          // 左侧滑动、安全区
          if ((endDx > startDx) && safe1 && !safe2) {
            log("ios左侧滑动返回被拦截$endDx", name: "WillPopScope");
            widget.onWillPop();
          }
        },
        onPointerDown: (details) => startDx = details.localPosition.dx,
        onPointerMove: (details) => endDx = details.localPosition.dx,
        child: material.WillPopScope(
          child: widget.child,
          onWillPop: () async => false,
        ),
      );
    } else {
      widget.onWillPop().then((value) {
        log(value ? "android触发滑动返回" : "android滑动返回被拦截", name: "WillPopScope");
      });
      return material.WillPopScope(
        onWillPop: widget.onWillPop,
        child: widget.child,
      );
    }
  }
}