import 'dart:core';
import 'dart:typed_data';
import 'package:fixnum/fixnum.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:grpc/grpc.dart';
import 'package:trackoffical_app/exception/exception.dart';
import 'package:trackoffical_app/logger.dart';
import 'package:trackoffical_app/route.dart' as r;
import 'package:sensor/sensor.dart';
import 'generated/google/protobuf/timestamp.pb.dart' as pb;
import 'generated/google/protobuf/duration.pb.dart' as pb;
import 'package:geolocator/geolocator.dart' as geo;

import 'model/distance.dart';
export 'model/distance.dart';

extension PbDurationExtension on pb.Duration {
  Duration toDuration() {
    final microseconds = hasNanos() ? nanos / 1000 : 0;
    return Duration(
        seconds: seconds.toInt(), microseconds: microseconds.toInt());
  }
}

extension DurationExtension on Duration {
  pb.Duration toPb() {
    final nanos =
        (inMicroseconds - inSeconds * Duration.microsecondsPerSecond) * 1000;
    return pb.Duration()..seconds= Int64(inSeconds) ..nanos= nanos;
  }

  String toMinSecondString(){
    final minute = inMinutes;
    var second = inSeconds;
    second = second - minute * Duration.secondsPerMinute;
    return '$minute\'$second\'\'';
  }

  String toAppString() {
    final countDown = this;
    var s = countDown.inSeconds;
    final h = (s / 3600).floor();
    final hStr = h.twoDigits();
    final m = ((s - h * 3600) / 60).floor();
    final mStr = m.twoDigits();
    final sStr = (s - h * 3600 - m * 60).twoDigits();
    return '$hStr:$mStr:$sStr';
  }

  Color paceColor(){
    final duration = inMilliseconds.abs().toDouble() / 60000;
    const maxPace = 5.0;
    const minPace = 15.0;


    var v = duration - maxPace;

    var p = v / (minPace - maxPace);
    if(p > 1){
      p = 1;
    }
    if(p < 0){
      p = 0;
    }

    var r = 0;
    var g = 255;

    if(p <= 0.5){
      r = (255.0 * (p / 0.5)).round();
    }else{
      r = 255;
    }

    if(p > 0.5){
      g = g - (255.0 * ((p-0.5) / 0.5)).round();
    }else{
      g = 255;
    }

    return Color.fromARGB(255, r, g, 34);
  }

}

extension DateTimeExtension on DateTime {
  String toAppString() {
    String y =
        (year >= -9999 && year <= 9999) ? _fourDigits(year) : _sixDigits(year);
    String m = _twoDigits(month);
    String d = _twoDigits(day);
    String h = _twoDigits(hour);
    String min = _twoDigits(minute);
    String sec = _twoDigits(second);

    return "$y-$m-$d $h:$min:$sec";
  }

  String toAppStringNoDate() {
    String h = _twoDigits(hour);
    String min = _twoDigits(minute);
    String sec = _twoDigits(second);

    return "$h:$min:$sec";
  }
}

extension Uint8ListExtension on Uint8List {
  String toHexString({String separator = ''}) {
    return isEmpty
        ? ""
        : map((e) {
            var s = e.toRadixString(16).toUpperCase();
            if (e < 10) {
              s = '0$s';
            }
            return s;
          }).join(separator);
  }
}

const hrPColors = <Color>[
  Color(0xff028FE1),
  Color(0xFF4D28ED),
  Color(0xFF0AB105),
  Color(0xFFFFB308),
  Color(0xFFFF6200),
  Color(0xFFD11122)
];

const userMarkColors = <Color>[
  Color(0xFFD112B7),
  Color(0xFF5312D1),
  Color(0xFF1272D1),
  Color(0xFF21AEAE),
  Color(0xFF612D61),
  Color(0xFFF6DE00),
  Color(0xFFFF7904),
  Color(0xFFFF8E97),
  Color(0xFF003C71),
  Color(0xFF850000),
];

extension IntExtension on int {
  String twoDigits() {
    if (this >= 10) return "$this";
    return "0$this";
  }

  Color toHRPColor() {
    final hrp = this;
    var color = const Color(0xff028FE1);
    if (hrp >= 40 && hrp <= 54) {
      color = const Color(0xFF4D28ED);
    }
    if (hrp >= 55 && hrp <= 69) {
      color = const Color(0xFF0AB105);
    }
    if (hrp >= 70 && hrp <= 79) {
      color = const Color(0xFFFFB308);
    }
    if (hrp >= 80 && hrp <= 89) {
      color = const Color(0xFFFF6200);
    }
    if (hrp >= 90 && hrp <= 9999999) {
      color = const Color(0xFFD11122);
    }
    return color;
  }

  Color toUserMarkColor() {
    final userid = this;
    return userMarkColors[userid % 10];
  }
}

String _twoDigits(int n) {
  if (n >= 10) return "$n";
  return "0$n";
}

String _fourDigits(int n) {
  int absN = n.abs();
  String sign = n < 0 ? "-" : "";
  if (absN >= 1000) return "$n";
  if (absN >= 100) return "${sign}0$absN";
  if (absN >= 10) return "${sign}00$absN";
  return "${sign}000$absN";
}

String _sixDigits(int n) {
  assert(n < -9999 || n > 9999);
  int absN = n.abs();
  String sign = n < 0 ? "-" : "+";
  if (absN >= 100000) return "$sign$absN";
  return "${sign}0$absN";
}

extension PbDateTimeExt on pb.Timestamp {
  DateTime? toDateTimeNullable() {
    if (nanos == 0 && seconds == 0) {
      return null;
    }
    return toDateTime(toLocal: true);
  }

  DateTime toModel() {
    return toDateTime(toLocal: true);
  }
}

extension DateTimeExt on DateTime? {
  pb.Timestamp toPb() {
    if (this != null) {
      return pb.Timestamp.fromDateTime(this!.toUtc());
    } else {
      return pb.Timestamp();
    }
  }

  String toHHmm() {
    final t = this;
    if (t == null) {
      return "00:00";
    }

    final hStr = t.hour.twoDigits();
    final mStr = t.minute.twoDigits();
    return '$hStr:$mStr';
  }
}
extension DoubleExtension on double {
  String kmToStr({int fixed=1}) {
    if(this < 1){
      return '${(this*1000).round()} m';
    }else{
      return '${toStringAsFixed(fixed)} km';
    }
  }


  Color paceColor(){
    var v = this - 5;

    var p = v / 4;
    if(p > 1){
      p = 1;
    }
    if(p < 0){
      p = 0;
    }

    var r = 0;
    var g = 255;

    if(p <= 0.5){
      r = (255.0 * (p / 0.5)).round();
    }else{
      r = 255;
    }

    if(p > 0.5){
      g = g - (255.0 * ((p-0.5) / 0.5)).round();
    }else{
      g = 255;
    }

    return Color.fromARGB(255, r, g, 34);
  }
}

class _AskLocationServiceState extends State<AskLocationServiceDialog> with WidgetsBindingObserver {
  @override
  void initState() {
    super.initState();
    //2.页面初始化的时候，添加一个状态的监听者
    WidgetsBinding.instance.addObserver(this);
  }

  @override
  void dispose() {
    super.dispose();
    //3. 页面销毁时，移出监听者
    WidgetsBinding.instance.removeObserver(this);
  }
  var isActive=true;
  //监听程序进入前后台的状态改变的方法
  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    super.didChangeAppLifecycleState(state);
    switch (state) {
    //进入应用时候不会触发该状态 应用程序处于可见状态，并且可以响应用户的输入事件。它相当于 Android 中Activity的onResume
      case AppLifecycleState.resumed:
        isActive=true;
        break;
    //应用状态处于闲置状态，并且没有用户的输入事件，
    // 注意：这个状态切换到 前后台 会触发，所以流程应该是先冻结窗口，然后停止UI
      case AppLifecycleState.inactive:
        break;
    //当前页面即将退出
      case AppLifecycleState.detached:
        break;
    // 应用程序处于不可见状态
      case AppLifecycleState.paused:
        break;
    }
  }
  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      icon: const Icon(Icons.location_on),
      title: const Text('需要打开系统定位'),
      content: const Text('用于展示附近商家和辅助定向'),
      actions: [
        TextButton(onPressed: ()=>Get.back(), child: const Text('暂不开启')),
        FilledButton(onPressed: ()async{
          await geo.Geolocator.openLocationSettings();
          isActive=false;
          while(!isActive){
            await 10.milliseconds.delay();
          }
          if(mounted){
            Get.back();
          }
        }, child: const Text('去设置'))
      ],
    );
  }
}

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

  static Future<void> show(){
    return Get.dialog(const AskLocationServiceDialog());
  }

  @override
  State<StatefulWidget> createState() {
    return _AskLocationServiceState();
  }
}
Future<bool> isLocationServiceEnabled() {
  return Sensor.isLocationServiceOpen();
}

Duration pacePerKm(Distance distance, Duration d){
  if(distance.km==0){
    return Duration.zero;
  }
  final m = d.inMilliseconds.toDouble();
  return  (m / distance.km).milliseconds;
}

Future<void> checkLocationService() async {
  // Test if location services are enabled.
  var serviceEnabled = await isLocationServiceEnabled();
  if (!serviceEnabled) {
    await AskLocationServiceDialog.show();

    if(!await isLocationServiceEnabled()){
      // Location services are not enabled don't continue
      // accessing the position and request users of the
      // App to enable the location services.
      return Future.error(NoServiceError());
    }
  }
}


Future<void> tryCatchApi(Future<void> Function() call, {
  String? errTitle,
  bool Function(GrpcError err)? onError,
  Future<void> Function()? onSuccess,
  VoidCallback? onFinally,
})async{

  try {
    await call();
    await onSuccess?.call();
  } on GrpcError catch (e) {
    warn(e);
    if(onError!= null){
      if (onError(e)){
        return;
      }
    }

    switch (e.code) {
      case StatusCode.unavailable:
        Get.snackbar('网络错误', "请稍后重试");
        break;
      case StatusCode.unauthenticated:
        if(await r.Route.toLogin(thenBack: true)){
          try{
            await call();
          }catch(e){
            Get.snackbar(errTitle?? "出错了", "未知错误");
          }
        }

        break;
      case StatusCode.unknown:
        Get.snackbar(errTitle?? "出错了", "未知错误");
        break;
      default:
        Get.snackbar(errTitle?? "出错了", e.message??'');
    }
  } catch (e) {
    warn(e);
    Get.snackbar(errTitle?? "出错了", "未知错误");
  }finally{
    onFinally?.call();
  }
}

String getFileExtensionFromUrl(String url) {
  String extension = '';
  if (url.isNotEmpty) {
    final path = Uri.parse(url).path;
    if (path.isNotEmpty) {
      int position = path.lastIndexOf('/');

      String fileName = path.substring(position + 1);
      position = fileName.lastIndexOf('.');
      if (position >= 0 && position < fileName.length - 1) {
        extension = fileName.substring(position + 1);
      }

    }
  }
  return extension;
}

extension MGetOnNum on num{
  Distance get km=> Distance(km: toDouble());
  Distance get meter=> Distance(m: toDouble());
  int get compassDegrees{
    var d = toInt();
    while (d < 0) {
      d += 360;
    }
    while (d > 360) {
      d -= 360;
    }
    return d;
  }
}