import 'dart:convert';

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: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 (_) {}
    });

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

    // fetch room list
    (() async {
      User user;
      try {
        user = await User.fromDisk();
      } catch (_) {
        // probably not logged in
        return;
      }

      try {
        final resp = await postWithCreadentials(
            path: 'listRooms',
            credentials: user,
            target: user.server,
            body: {});
        if (resp.res == Result.ok) {
          final List<Room> list = resp.body['data'].map<Room>((json){
            return Room.fromJSON(json);
        }).toList();
          for (Room r in list) {
            await r.toDisk();
          }
        }
      } catch (_) {}
    })();
  }

  @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',
      ),
    );
  }
}