import 'dart:convert';

import 'package:libac_flutter/nbt/NbtUtils.dart';
import 'package:libac_flutter/nbt/Tag.dart';
import 'package:libac_flutter/nbt/impl/CompoundTag.dart';
import 'package:libac_flutter/nbt/impl/StringTag.dart';
import 'package:libac_flutter/packets/packets.dart';
import 'package:libac_flutter/utils/uuid/NbtUUID.dart';
import 'package:libac_flutter/utils/uuid/UUID.dart';
import 'package:servermanager/structs/settings.dart';

class ClientPackets {
  static void register() {
    PacketRegistry reg = PacketRegistry();
    reg.register(C2SLoginPacket(), () {
      return C2SLoginPacket();
    });
  }
}

class C2SLoginPacket implements IPacket {
  String username = "";
  String password = "";

  @override
  void decodeJson(String params) {
    fromJson(json.decode(params));
  }

  @override
  void decodeTag(Tag tag) {
    CompoundTag ct = tag.asCompoundTag();
    username = ct.get("username")!.asString();
    password = ct.get("password")!.asString();
  }

  @override
  NetworkDirection direction() {
    return NetworkDirection.ClientToServer;
  }

  @override
  String encodeJson() {
    return json.encode(toJson());
  }

  @override
  Tag encodeTag() {
    CompoundTag tag = CompoundTag();
    tag.put("username", StringTag.valueOf(username));
    tag.put("password", StringTag.valueOf(password));

    return tag;
  }

  @override
  void fromJson(Map<String, dynamic> js) {
    username = js['username'] as String;
    password = js['password'] as String;
  }

  @override
  String getChannelID() {
    return "Login";
  }

  @override
  Future<PacketResponse> handleServerPacket() async {
    S2CResponse response = S2CResponse();

    // Attempt to log in.
    Settings settings = Settings();
    if (settings.serverLoginCreds.username == username &&
        settings.serverLoginCreds.password == password) {
      NbtUtils.writeBoolean(response.contents, "valid", true);
      settings.remoteLoginToken = UUID.generate(4);
      NbtUtils.writeUUID(response.contents, "token",
          NbtUUID.fromUUID(settings.remoteLoginToken));
    } else {
      NbtUtils.writeBoolean(response.contents, "valid", false);
    }

    return PacketResponse(replyDataTag: response.encodeTag().asCompoundTag());
  }

  @override
  Map<String, dynamic> toJson() {
    return {"username": username, "password": password};
  }

  @override
  Future<void> handleClientPacket() async {}
}