import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:outbag_app/backend/permissions.dart';
import 'package:outbag_app/backend/request.dart';
import 'package:outbag_app/backend/user.dart';
import 'package:outbag_app/tools/fetch_wrapper.dart';
import 'package:provider/provider.dart';
import 'package:go_router/go_router.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import '../backend/room.dart';

class HomePage extends StatefulWidget {
  const HomePage({super.key});
  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  List<Room> rooms = [];

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

    // wait for background room changes
    Room.listen((_) async {
        try {
          final newRooms = await Room.listRooms();
          setState(() {
              rooms = newRooms;
          });
        } catch (_) {}
    });

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

  void fetchList() async {
    final sm = ScaffoldMessenger.of(context);
    final user = context.read<User>();

    // load cached rooms
    try {
      final newRooms = await Room.listRooms();
      setState(() {
          rooms = newRooms;
      });
    } catch (_) {}

    doNetworkRequest(
      sm,
      req: () => postWithCreadentials(
        path: 'listRooms', credentials: user, target: user.server, body: {}),
      onOK: (body) async {
        final List<Room> list = body['data'].map<Room>((json) {
            return Room.fromJSON(json);
        }).toList();
        for (Room r in list) {
          await r.toDisk();
        }
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Outbag"),
        actions: [
          IconButton(
            icon: const Icon(Icons.search),
            tooltip: AppLocalizations.of(context)!.search,
            onPressed: () {
              // show searchbar
              // NOTE: location currently unknown
            },
          ),
          MenuAnchor(
            builder: (ctx, controller, child) {
              return IconButton(
                onPressed: () {
                  if (controller.isOpen) {
                    controller.close();
                  } else {
                    controller.open();
                  }
                },
                icon: const Icon(Icons.more_vert),
              );
            },
            menuChildren: [
              MenuItemButton(
                leadingIcon: const Icon(Icons.settings),
                child: Text(AppLocalizations.of(context)!.settings),
                onPressed: () {
                  // show settings screen
                  context.goNamed('settings');
              }),
              ...(context.watch<AccountMeta?>() != null &&
                (context.watch<AccountMeta?>()?.permissions)! &
                ServerPermission.allManagement !=
                0)
              ? [
                MenuItemButton(
                  leadingIcon: const Icon(Icons.dns),
                  child: Text(AppLocalizations.of(context)!.serverDashboard),
                  onPressed: () {
                    // show settings screen
                    context.goNamed('dash');
                }),
              ]
              : [],
              MenuItemButton(
                leadingIcon: const Icon(Icons.info_rounded),
                child: Text(AppLocalizations.of(context)!.about),
                onPressed: () {
                  // show about screen
                  context.goNamed('about');
              }),
            ],
          )
        ],
      ),
      body: ListView.builder(
        itemCount: rooms.length,
        itemBuilder: (ctx, i) {
          final room = rooms[i];
          return Card(
            margin: const EdgeInsets.all(8.0),
            clipBehavior: Clip.antiAliasWithSaveLayer,
            semanticContainer: true,
            child: InkWell(
              onTap: () {
                // open room
                context.goNamed('room',
                  params: {'server': room.serverTag, 'id': room.id});
              },
              onLongPress: () {
                // open bottom sheet
                // NOTE: feature yet to be confirmed
              },
              child: Container(
                padding: const EdgeInsets.fromLTRB(10, 5, 5, 10),
                child: ListTile(
                  title: Text(room.name),
                  visualDensity: const VisualDensity(vertical: 3),
                  subtitle: Text(room.description),
                  leading: AspectRatio(
                    aspectRatio: 1 / 1,
                    child: SvgPicture.asset("${room.icon?.img}"),
                  ),
                  hoverColor: Colors.transparent,
          ))));
        },
      ),
      floatingActionButton: FloatingActionButton.extended(
        label: Text(AppLocalizations.of(context)!.addRoom),
        icon: const Icon(Icons.add),
        onPressed: () {
          // create new room
          context.goNamed('add-room');
        },
        tooltip: AppLocalizations.of(context)!.addRoomHint,
      ),
    );
  }
}