package org.fml.scape.net.codec;

import java.security.SecureRandom;

import org.fml.scape.util.Message;
import org.fml.scape.util.Message.PacketType;
import org.fml.scape.util.MessageBuilder;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.frame.FrameDecoder;

public class RS2Decoder extends FrameDecoder {

    MessageBuilder response = new MessageBuilder();

    @Override
    protected Object decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer cb) throws Exception {
        int opcode = cb.readByte() & 0xFF;
        Message message = new Message(opcode, PacketType.STANDARD, cb);
        switch(opcode) {
            case 14:
            case 15:
                if(1 <= cb.readableBytes()) {
                    for(int i = 0; i < 9; i++) {
                        response.writeByte(0);
                    }
                    response.writeLong(new SecureRandom().nextLong());
                    message.readUnsignedByte();
                    int loginPacketSize = message.readUnsignedByte();
                    int loginEncryptPacketSize = loginPacketSize - (36 + 1 + 1 + 2);
                    response.writeInt(loginEncryptPacketSize);
                    message.readUnsignedByte();
                    message.readUnsignedByte();
                    message.readUnsignedByte();
                    for (int i = 0; i < 9; i++) {
                        message.readInt();
                    }
                    loginEncryptPacketSize--;
                    message.readUnsignedByte(); // temp
                    message.readUnsignedByte(); // temp
                    message.readLong(); // client session
                    message.readLong(); // server session
                    message.readLong(); // user id
                    String username = message.readRS2String(); // name
                    String pass = message.readRS2String(); // password
                    pass = pass.toLowerCase(); // low case password
                    username = username.trim(); // returns a copy of the string
                    System.out.println("newPlayer [" + username + ":" + pass + "]");
                    response.writeByte(ReturnCode.LOGIN_OK.value); // return code
                    response.writeByte(2); // rights
                    response.writeByte(0); // might be player index?
                }
                break;
        }
        return null;
    }

    /**
     * All of the return codes for login.
     *
     * @author Sir Tom
     *
     */
    public enum ReturnCode {

        LOGIN_OK(2), WORLD_FULL(7);

        private int value;

        ReturnCode(int value) {
            this.value = value;
        }
    }
}