import 'dart:async';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:aslan/chatvibe_core/utilities/at_room_utils.dart';
import 'package:aslan/chatvibe_data/sources/local/user_manager.dart';
import 'package:aslan/chatvibe_domain/models/res/login_res.dart';
import 'package:aslan/chatvibe_ui/components/at_debounce_widget.dart';
import 'package:aslan/chatvibe_ui/components/at_compontent.dart';
import 'package:provider/provider.dart';
import 'package:aslan/chatvibe_data/sources/remote/net/network_client.dart';
import 'package:aslan/chatvibe_domain/models/res/join_room_res.dart';
import 'package:aslan/chatvibe_managers/rtc_manager.dart';
import 'package:aslan/chatvibe_core/constants/at_screen.dart';

// 默认位置
Offset kDefaultFloatOffset = Offset(
  ScreenUtil().screenWidth - width(90),
  ScreenUtil().screenHeight - height(120),
);

class ATFloatIchart {
  /// 单例模式
  static final ATFloatIchart _ATFloatIchart = ATFloatIchart._internal(); //1
  factory ATFloatIchart() {
    return _ATFloatIchart;
  }

  ATFloatIchart._internal();

  bool _inserted = false;
  OverlayEntry? overlayEntry;
  BuildContext? context;
  Offset offset = kDefaultFloatOffset;

  show() {
    if (overlayEntry != null) {
      remove(); // 先移除已有的
    }
    var overlayState = Overlay.of(context!);
    overlayEntry = OverlayEntry(
      builder: (context) {
        if (inLoginPage) {
          remove();
          return Container();
        } else {
          return buildToastLayout();
        }
      },
    );
    overlayState.insert(overlayEntry!);
    _inserted = true; // 标记已插入
  }

  bool isShow() {
    return _inserted;
  }

  remove() {
    if (overlayEntry != null && overlayEntry!.mounted) {
      if (_inserted) {
        overlayEntry?.remove();
        _inserted = false;
      }
    }
  }

  LayoutBuilder buildToastLayout() {
    Timer? timer;
    return LayoutBuilder(
      builder: (context, constraints) {
        return Stack(
          children: <Widget>[
            Positioned(
              left: offset.dx,
              top: offset.dy,
              child: GestureDetector(
                //更新child的位置
                onPanUpdate: (details) {
                  var localPosition = details.delta;
                  var dx = (offset.dx + localPosition.dx).clamp(
                    0.0,
                    ScreenUtil().screenWidth - width(90),
                  );
                  var dy = (offset.dy + localPosition.dy).clamp(
                    0.0,
                    ScreenUtil().screenHeight - height(55) - kToolbarHeight,
                  );
                  offset = Offset(dx, dy);
                  overlayEntry!.markNeedsBuild();
                },
                //拖动结束，处理child贴边悬浮
                onPanEnd: (details) {
                  var oldPosition = offset.dx;
                  var targets =
                      offset.dx + width(80) > (ScreenUtil().screenWidth / 2)
                          ? ScreenUtil().screenWidth - width(90)
                          : 0;
                  timer = Timer.periodic(Duration(milliseconds: 1), (t) {
                    if (targets > 0) {
                      oldPosition++;
                    } else {
                      oldPosition--;
                    }
                    offset = Offset(oldPosition.toDouble(), offset.dy);
                    overlayEntry!.markNeedsBuild();
                    if (oldPosition < 0 ||
                        oldPosition > ScreenUtil().screenWidth - width(90)) {
                      timer?.cancel();
                    }
                  });
                },
                child: Container(
                  child: float(),
                  margin: EdgeInsets.only(bottom: height(kToolbarHeight)),
                ),
              ),
            ),
          ],
        );
      },
    );
  }

  Widget float() {
    JoinRoomRes? room =
        Provider.of<RealTimeCommunicationManager>(
          context!,
          listen: false,
        ).currenRoom;
    // User user = Provider.of<RealTimeCommunicationManager>(context, listen: false).maiMap[0];
    ChatVibeLoginRes? user = AccountStorage().getCurrentUser();
    return FloatRoomWindow(room: room, user: user, remove: remove);
  }

  void init(BuildContext context) {
    this.context = context;
  }
}

class FloatRoomWindow extends StatefulWidget {
  final JoinRoomRes? room;
  final ChatVibeLoginRes? user;
  final Function remove;

  const FloatRoomWindow({Key? key, this.room, this.user, required this.remove})
    : super(key: key);

  @override
  _FloatRoomWindowState createState() => _FloatRoomWindowState();
}

class _FloatRoomWindowState extends State<FloatRoomWindow> {
  @override
  void initState() {
    super.initState();
  }

  @override
  void dispose() {
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return ATDebounceWidget(
      onTap: () {
        ATRoomUtils.openCurrentRoom(context);
      },
      child: Container(
        height: 55.w,
        width: 90.w,
        decoration: BoxDecoration(
          borderRadius: BorderRadius.circular(8.w),
         gradient: LinearGradient(
            colors: [
              Color(0xFFFEB219),
              Color(0xFFFF9326),
            ],
          ),
        ),
        child: Row(
          crossAxisAlignment: CrossAxisAlignment.center,
          children: <Widget>[
            SizedBox(width: 8.w),
            Stack(
              alignment: Alignment.center,
              children: [
                netImage(
                  url: widget.room?.roomProfile?.roomProfile?.roomCover ?? "",
                  width: 40.w,
                  height: 40.w,
                  borderRadius: BorderRadius.circular(8.w),
                ),
                Image.asset(
                  "atu_images/index/at_icon_room_flot_ani.gif",
                  width: 15.w,
                  height: 15.w,
                ),
              ],
            ),
            SizedBox(width: width(5)),
            ATDebounceWidget(
              onTap: () {
                Provider.of<RealTimeCommunicationManager>(
                  context,
                  listen: false,
                ).extRoom(false);
                Timer(Duration(milliseconds: 550), () {
                  widget.remove.call();
                });
              },
              child: Padding(
                padding: EdgeInsets.all(5.w),
                child: Image.asset(
                  "atu_images/index/at_icon_room_flot_close.png",
                  width: 20.w,
                  height: 20.w,
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}