// Copyright (C) 2025, uvok cheetah
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

import 'package:badge/model/device.dart';
import 'package:flutter/material.dart';
import 'package:logger/logger.dart';

var logger = Logger();

class DeviceDetailsScreen extends StatefulWidget {
  final Device device;

  const DeviceDetailsScreen({super.key, required this.device});

  @override
  State<StatefulWidget> createState() {
    return DeviceDetailsState();
  }
}

class DeviceDetailsState extends State<DeviceDetailsScreen> {
  String connectStatus = "<Status>";
  // Just to have a resonable default subscription?
  // StreamSubscription<BluetoothConnectionState> subs =
  //     Stream<BluetoothConnectionState>.empty().listen((e) => ());

  /// Whether the back button should be active.
  bool backActive = false;

  // BluetoothCharacteristic? current;
  // BluetoothCharacteristic? available;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text("Device details"),
      ),
      body: Center(
        child: Column(
          spacing: 20,
          children: [
            Text(connectStatus),
            ElevatedButton(
              onPressed: backActive ? backClick : null,
              child: Text("Back"),
            ),
          ],
        ),
      ),
    );
  }

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

  void backClick() {
    Navigator.pop(context);
  }

  void onConnStateChange(ConnectionStatus event) {
    setState(() {
      connectStatus = event.toString();
    });
    logger.i("New conn state: ${event.toString()}");
  }

  @override
  void deactivate() {
    super.deactivate();
    logger.i("Closing state");
    // subs.cancel().ignore();
    // widget.device.disconnect().ignore();
  }

  void _doConnect() async {
    final dev = widget.device;
    // subs.cancel().ignore();
    // subs = dev.connectionState.listen(onConnStateChange);
    try {
      logger.i("Try to connect...");
      // connect timeout doesn't work under Linux
      // await dev.connect().timeout(Duration(seconds: 2));
      // logger.i("Connected!");

      // connectStatus = "Connected";

      // // ???? WTF ????
      // List<BluetoothService> svcs = await dev.discoverServices();
      // dev.onServicesReset.listen((_) async {
      //   logger.i("Services Reset");
      //   try {
      //     List<BluetoothService> svcs = await dev.discoverServices();
      //     findCharac(svcs);
      //   } catch (e) {
      //     logger.e(e);
      //   }
      // });

      // logger.i("services discovered");

      // findCharac(svcs);
    } catch (e) {
      logger.e(e);
      // dev.disconnect().ignore();
      connectStatus = e.toString();
    } finally {
      backActive = true;
      if (mounted) {
        setState(() {});
      }
    }
  }

  // void findCharac(List<BluetoothService> svcs) {
  //   if (svcs.isEmpty) {
  //     connectStatus += ", No services found!";
  //     return;
  //   }
  //   connectStatus += ", Services found!";
  //   BluetoothService? badgeService = svcs.firstWhereOrNull(
  //     (s) => s.serviceUuid.str == "ca260000-b4bb-46b2-bd06-b7b7a61ea990",
  //   );

  //   if (badgeService == null) {
  //   } else {
  //     logger.i("badge service found");
  //     current = badgeService.characteristics.firstWhereOrNull(
  //       (c) =>
  //           c.characteristicUuid.str == "ca260001-b4bb-46b2-bd06-b7b7a61ea990",
  //     );
  //     available = badgeService.characteristics.firstWhereOrNull(
  //       (c) =>
  //           c.characteristicUuid.str == "ca260002-b4bb-46b2-bd06-b7b7a61ea990",
  //     );
  //   }

  //   if (current == null || available == null) {
  //   } else {
  //     logger.i("characteristics found");
  //   }
  // }
}