package net.krakatoaapi.protocol;

import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import net.krakatoaapi.KrakatoaAPI;

public class KraProtocol {

  public void SendMessage(KraProtocolMessage kraProtocolMessage) {
    SendMessage(kraProtocolMessage.getStatus(), kraProtocolMessage.getCmdID(),
        kraProtocolMessage.getDest(), kraProtocolMessage.getUuid(),
        kraProtocolMessage.getCmdNumber(), kraProtocolMessage.getArgs());
  }

  public void SendMessage(int status, int cmdID, int dest, String uuid, int cmdNumber,
      String args) {
    System.out.println("sendMessage: " + status + " " + cmdID + " " + dest + " " + cmdNumber);

    int argLen = args.length();

    byte[] raw = new byte[40 + argLen];

    raw[0] = (byte) status;

    raw[1] = (byte) cmdID;
    raw[2] = (byte) (cmdID >> 8);
    raw[3] = (byte) (cmdID >> 16);
    raw[4] = (byte) (cmdID >> 24);

    raw[5] = (byte) dest;

    byte[] uuidBytes = uuid.getBytes();

    /* for (int i = 0; i < 32; i++) {
      raw[6 + i] = uuidBytes[i];
    }*/

    System.arraycopy(uuidBytes, 0, raw, 6, 32);

    raw[38] = (byte) cmdNumber;
    raw[39] = (byte) (cmdNumber >> 8);

    if (argLen > 0) {
      for (int i = 0; i < argLen; i++) {
        raw[40 + i] = (byte) args.charAt(i);
      }
    }

    System.out.println("raw: " + Arrays.toString(raw));

    KrakatoaAPI.getInstance().getSocketClient().SendMessage(raw);
  }

  public KraProtocolMessage DecodeMessage(byte[] data) {
    System.out.println("start decode");
    
    byte status = data[0];

    int cmdID = Byte.toUnsignedInt(data[1]);

    cmdID += Byte.toUnsignedInt(data[2]) * 256;
    cmdID += Byte.toUnsignedInt(data[3]) * 256 * 256;
    cmdID += Byte.toUnsignedInt(data[4]) * 256 * 256 * 256;

    int dest = Byte.toUnsignedInt(data[5]);

    byte[] playerUuidBytes = new byte[32];

    System.arraycopy(data, 6, playerUuidBytes, 0, 32);

    /* for (int i = 0; i < 32; i++) {
      playerUuidBytes[i] = data[6 + i];
    } */

    String playerUuid = new String(playerUuidBytes, StandardCharsets.UTF_8);

    short cmdNumber = (short) (Byte.toUnsignedInt(data[38]) + (Byte.toUnsignedInt(data[39]) * 256));

    int argLen = data.length - 40;
    byte[] argsBytes = new byte[argLen];

    /* for (int i = 0; i < argLen; i++) {
      argsBytes[i] = data[40 + i];
    } */

    System.arraycopy(data, 40, argsBytes, 0, argLen);

    String args = new String(argsBytes, StandardCharsets.UTF_8);

    System.out.println(
        "decoded message " + status + " " + cmdID + " " + dest + " " + playerUuid + " "
            + cmdNumber + " " + args + " ");

    return new KraProtocolMessage(status, cmdID, dest, playerUuid, cmdNumber, args);
  }
}