import 'dart:async';
import 'dart:io';

import 'package:amap_flutter_location/amap_flutter_location.dart';
import 'package:amap_flutter_location/amap_location_option.dart';
import 'package:amap_flutter_map/amap_flutter_map.dart';
import 'package:autosos_flutter/const_config.dart';
import 'package:flutter/material.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:amap_flutter_base/amap_flutter_base.dart';

class MapWidget extends StatefulWidget {
  const MapWidget({super.key});

  @override
  State<MapWidget> createState() => _MapWidgetState();
}

class _MapWidgetState extends State<MapWidget> {
  AMapController? _mapController;
  Map<String, Object> _locationResult = {};
  late StreamSubscription<Map<String, Object>> _locationListener;
  final AMapFlutterLocation _locationPlugin = AMapFlutterLocation();

  @override
  void dispose() {
    super.dispose();
    _locationListener.cancel();
    _locationPlugin.destroy();
  }

  @override
  void initState() {
    super.initState();

    /// 设置是否已经包含高德隐私政策并弹窗展示显示用户查看，如果未包含或者没有弹窗展示，高德定位SDK将不会工作
    ///
    /// 高德SDK合规使用方案请参考官网地址：https://lbs.amap.com/news/sdkhgsy
    /// <b>必须保证在调用定位功能之前调用， 建议首次启动App时弹出《隐私政策》并取得用户同意</b>
    ///
    /// 高德SDK合规使用方案请参考官网地址：https://lbs.amap.com/news/sdkhgsy
    ///
    /// [hasContains] 隐私声明中是否包含高德隐私政策说明
    ///
    /// [hasShow] 隐私权政策是否弹窗展示告知用户
    AMapFlutterLocation.updatePrivacyShow(true, true);

    /// 设置是否已经取得用户同意，如果未取得用户同意，高德定位SDK将不会工作
    ///
    /// 高德SDK合规使用方案请参考官网地址：https://lbs.amap.com/news/sdkhgsy
    ///
    /// <b>必须保证在调用定位功能之前调用, 建议首次启动App时弹出《隐私政策》并取得用户同意</b>
    ///
    /// [hasAgree] 隐私权政策是否已经取得用户同意
    AMapFlutterLocation.updatePrivacyAgree(true);

    /// 动态申请定位权限
    requestPermission();

    ///设置Android和iOS的apiKey<br>
    ///
    /// 定位Flutter插件提供了单独的设置ApiKey的接口，
    /// 使用接口的优先级高于通过Native配置ApiKey的优先级（通过Api接口配置后，通过Native配置文件设置的key将不生效），
    /// 使用时可根据实际情况决定使用哪种方式
    ///
    ///key的申请请参考高德开放平台官网说明<br>
    ///
    ///Android: https://lbs.amap.com/api/android-location-sdk/guide/create-project/get-key
    ///
    ///iOS: https://lbs.amap.com/api/ios-location-sdk/guide/create-project/get-key
    AMapFlutterLocation.setApiKey(ConstConfig.androidKey, ConstConfig.iosKey);

    ///iOS 获取native精度类型
    if (Platform.isIOS) {
      requestAccuracyAuthorization();
    }

    var option = AMapLocationOption();
    _locationPlugin.setLocationOption(option);

    ///注册定位结果监听
    _locationListener = _locationPlugin
        .onLocationChanged()
        .listen((Map<String, Object> result) {
      setState(() {
        _locationResult = result;
      });
      print("location=$_locationResult");
    });
    _locationPlugin.startLocation();
    WidgetsBinding.instance.addPostFrameCallback((_) {
      // 在页面渲染完成后执行代码
      // 例如，你可以在此处执行需要在页面加载完成后执行的操作
    });
  }

  @override
  Widget build(BuildContext context) {
    AMapWidget map = AMapWidget(
      ///必须正确设置的合规隐私声明，否则SDK不会工作，会造成地图白屏等问题。
      privacyStatement: ConstConfig.amapPrivacyStatement,
      apiKey: ConstConfig.amapApiKeys,
      mapType: MapType.navi,
      scaleEnabled: false,
      myLocationStyleOptions: MyLocationStyleOptions(
        true,
        circleFillColor: Colors.lightBlue,
        circleStrokeColor: Colors.blue,
        circleStrokeWidth: 1,
      ),
      onMapCreated: (AMapController controller) {
        setState(() {
          _mapController = controller;
          getApprovalNumber();
        });
          _moveCamera(_locationResult);
      },
    );
    return Expanded(
        child: Stack(
      children: [
        Container(
          margin: const EdgeInsets.only(top: 10, bottom: 10),
          decoration: const BoxDecoration(
              color: Colors.white,
              borderRadius: BorderRadius.all(Radius.circular(5))),
          child: map,
        ),
        Positioned(
          bottom: 20,
          right: 20,
          child: Image.asset(
            "images/3.0x/current_location.png",
            width: 30,
            height: 30,
          ),
        )
      ],
    ));
  }

  void _moveCamera(Map<String, Object> result) {
    double lat = double.parse(result['latitude'] as String);
    double lng = double.parse(result['longitude'] as String);
    if (_mapController != null) {
      _mapController!.moveCamera(CameraUpdate.newCameraPosition(
          CameraPosition(target: LatLng(lat, lng),zoom: 18)));
    }

  }

  ///获取审图号
  void getApprovalNumber() async {
    //普通地图审图号
    String? mapContentApprovalNumber =
        await _mapController?.getMapContentApprovalNumber();
    //卫星地图审图号
    String? satelliteImageApprovalNumber =
        await _mapController?.getSatelliteImageApprovalNumber();
    print('地图审图号（普通地图）: $mapContentApprovalNumber');
    print('地图审图号（卫星地图): $satelliteImageApprovalNumber');
  }

  void requestPermission() async {
// 申请权限
    bool hasLocationPermission = await requestLocationPermission();
    if (hasLocationPermission) {
      print("定位权限申请通过");
    } else {
      print("定位权限申请不通过");
    }
  }

  /// 申请定位权限
  /// 授予定位权限返回true， 否则返回false
  Future<bool> requestLocationPermission() async {
    //获取当前的权限
    var status = await Permission.locationAlways.status;
    if (status == PermissionStatus.granted) {
      //已经授权
      return true;
    } else {
      //未授权则发起一次申请
      status = await Permission.locationAlways.request();
      if (status == PermissionStatus.granted) {
        return true;
      } else {
        return false;
      }
    }
  }

  ///获取iOS native的accuracyAuthorization类型
  void requestAccuracyAuthorization() async {
    AMapAccuracyAuthorization currentAccuracyAuthorization =
        await _locationPlugin.getSystemAccuracyAuthorization();
    if (currentAccuracyAuthorization ==
        AMapAccuracyAuthorization.AMapAccuracyAuthorizationFullAccuracy) {
      print("精确定位类型");
    } else if (currentAccuracyAuthorization ==
        AMapAccuracyAuthorization.AMapAccuracyAuthorizationReducedAccuracy) {
      print("模糊定位类型");
    } else {
      print("未知定位类型");
    }
  }
}