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:routemaster/routemaster.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);

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

    doNetworkRequest(sm,
      req: (user) => 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();
        }
      },
      onUserErr: ()=>false
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Outbag"),
        actions: [
          IconButton(
            icon: const Icon(Icons.search),
            tooltip: "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: const Text('Settings'),
                  onPressed: () {
                    // show settings screen
                    Routemaster.of(context).push("/settings");
                  }),
              ...(context.watch<AccountMeta?>() != null &&
                      (context.watch<AccountMeta?>()?.permissions)! &
                              ServerPermission.allManagement !=
                          0)
                  ? [
                      MenuItemButton(
                          leadingIcon: const Icon(Icons.dns),
                          child: const Text('Server Dashboard'),
                          onPressed: () {
                            // show settings screen
                            Routemaster.of(context).push("/server");
                          }),
                    ]
                  : [],
              MenuItemButton(
                  leadingIcon: const Icon(Icons.info_rounded),
                  child: const Text('About'),
                  onPressed: () {
                    // show about screen
                    Routemaster.of(context).push("/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
                    Routemaster.of(context)
                        .push("/r/${room.serverTag}/${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: const Text('Add Room'),
        icon: const Icon(Icons.add),
        onPressed: () {
          // create new room
          Routemaster.of(context).push("/add-room");
        },
        tooltip: 'Add new Room',
      ),
    );
  }
}