import 'dart:math';

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:outbag_app/backend/permissions.dart';
import 'package:outbag_app/backend/request.dart';
import 'package:outbag_app/backend/room.dart';
import 'package:outbag_app/backend/user.dart';
import 'package:outbag_app/tools/fetch_wrapper.dart';
import 'package:provider/provider.dart';

class EditRoomPermissionSetPage extends StatefulWidget {
  final String server;
  final String tag;

  const EditRoomPermissionSetPage(this.server, this.tag, {super.key});

  @override
  State<StatefulWidget> createState() => _EditRoomPermissionSetPageState();
}

class _EditRoomPermissionSetPageState extends State<EditRoomPermissionSetPage> {
  List<int> items = RoomPermission.asList;
  int permissions = 0;

  void fetchInfo() {
    final router = GoRouter.of(context);
    final sm = ScaffoldMessenger.of(context);
    final user = context.read<User>();

    doNetworkRequest(
      sm,
      req: () => postWithCreadentials(
        path: 'getRoomInfo',
        credentials: user,
        target: user.server,
        body: {'room': widget.tag, 'server': widget.server}),
      onAnyErr: () {
        // user should not be here
        // close screen
        router.pushReplacementNamed('home');
        return false;
      },
      onOK: (body) async {
        final info = RoomInfo.fromJSON(body['data']);
        setState(() {
            permissions = info.permissions;
        });
        return true;
      },
    );
  }

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

    WidgetsBinding.instance.addPostFrameCallback((_) => fetchInfo());
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Default permissions'),
        leading: IconButton(
          onPressed: () {
            // go back
            Navigator.of(context).pop();
          },
          icon: const Icon(Icons.arrow_back),
          tooltip: "Go back",
        ),
      ),
      body: ListView.builder(
        itemCount: items.length,
        itemBuilder: (context, index) {
          final item = items[index];

          final int col = pow(2, index + 1) as int;

          return SwitchListTile(
            title: Text(RoomPermission.name(item)),
            subtitle: Text(RoomPermission.describe(item)),
            onChanged: (state) {
              setState(() {
                  permissions += (state ? 1 : -1) * col;
              });
            },
            value: permissions & col != 0);
        },
      ),
      floatingActionButton: FloatingActionButton.extended(
        icon: const Icon(Icons.edit),
        tooltip: "Update default permission set",
        label: const Text('Edit'),
        onPressed: () {
          final router = GoRouter.of(context);
          final sm = ScaffoldMessenger.of(context);
          final user = context.read<User>();

          // update permissions
          doNetworkRequest(sm,
            req: () => postWithCreadentials(
              path: 'setRoomRight',
              credentials: user,
              target: user.server,
              body: {
                'room': widget.tag,
                'server': widget.server,
                'rights': permissions
            }),
            onOK: (_) {
              router.pop();
          });
        },
      ),
    );
  }
}