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/*
 * GetSelInfo.java 
 * Created on 2011-08-11
 *
 * Copyright (c) Verax Systems 2011.
 * All rights reserved.
 *
 * This software is furnished under a license. Use, duplication,
 * disclosure and all other uses are restricted to the rights
 * specified in the written license agreement.
 */
package com.veraxsystems.vxipmi.coding.commands.sel;

import com.veraxsystems.vxipmi.coding.commands.CommandCodes;
import com.veraxsystems.vxipmi.coding.commands.IpmiCommandCoder;
import com.veraxsystems.vxipmi.coding.commands.IpmiVersion;
import com.veraxsystems.vxipmi.coding.commands.ResponseData;
import com.veraxsystems.vxipmi.coding.payload.CompletionCode;
import com.veraxsystems.vxipmi.coding.payload.IpmiPayload;
import com.veraxsystems.vxipmi.coding.payload.lan.IPMIException;
import com.veraxsystems.vxipmi.coding.payload.lan.IpmiLanRequest;
import com.veraxsystems.vxipmi.coding.payload.lan.IpmiLanResponse;
import com.veraxsystems.vxipmi.coding.payload.lan.NetworkFunction;
import com.veraxsystems.vxipmi.coding.protocol.AuthenticationType;
import com.veraxsystems.vxipmi.coding.protocol.IpmiMessage;
import com.veraxsystems.vxipmi.coding.security.CipherSuite;
import com.veraxsystems.vxipmi.common.TypeConverter;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

/**
 * Wrapper class for Get SEL Info request.
 */
public class GetSelInfo extends IpmiCommandCoder {

    /**
     * Initiates GetSelInfo for both encoding and decoding.
     *
     * @param version
     *            IPMI version of the command.
     * @param cipherSuite
     *            {@link CipherSuite} containing authentication,
     *            confidentiality and integrity algorithms for this session.
     * @param authenticationType
     *            Type of authentication used. Must be RMCPPlus for IPMI v2.0.
     */
    public GetSelInfo(IpmiVersion version, CipherSuite cipherSuite,
            AuthenticationType authenticationType) {
        super(version, cipherSuite, authenticationType);
    }

    @Override
    public byte getCommandCode() {
        return CommandCodes.GET_SEL_INFO;
    }

    @Override
    public NetworkFunction getNetworkFunction() {
        return NetworkFunction.StorageRequest;
    }

    @Override
    protected IpmiPayload preparePayload(int sequenceNumber)
            throws NoSuchAlgorithmException, InvalidKeyException {
        return new IpmiLanRequest(getNetworkFunction(), getCommandCode(), null,
                TypeConverter.intToByte(sequenceNumber));
    }

    @Override
    public ResponseData getResponseData(IpmiMessage message) throws IPMIException, NoSuchAlgorithmException, InvalidKeyException {
        if (!isCommandResponse(message)) {
            throw new IllegalArgumentException(
                    "This is not a response for Get SEL Info command");
        }
        if (!(message.getPayload() instanceof IpmiLanResponse)) {
            throw new IllegalArgumentException("Invalid response payload");
        }
        if (((IpmiLanResponse) message.getPayload()).getCompletionCode() != CompletionCode.Ok) {
            throw new IPMIException(
                    ((IpmiLanResponse) message.getPayload())
                            .getCompletionCode());
        }

        byte[] raw = message.getPayload().getIpmiCommandData();

        if (raw == null || raw.length != 14) {
            throw new IllegalArgumentException("Invalid response payload length: " + (raw != null ? raw.length : "null"));
        }

        GetSelInfoResponseData responseData = new GetSelInfoResponseData();

        responseData.setSelVersion(TypeConverter
                .littleEndianBcdByteToInt(raw[0]));

        byte[] buffer = new byte[4];

        buffer[0] = raw[1];
        buffer[1] = raw[2];
        buffer[2] = 0;
        buffer[3] = 0;

        responseData.setEntriesCount(TypeConverter
                .littleEndianByteArrayToInt(buffer));

        System.arraycopy(raw, 5, buffer, 0, 4);

        responseData.setAdditionTimestamp(TypeConverter
                .decodeDate(TypeConverter.littleEndianByteArrayToInt(buffer)));

        System.arraycopy(raw, 9, buffer, 0, 4);

        responseData.setEraseTimestamp(TypeConverter.decodeDate(TypeConverter
                .littleEndianByteArrayToInt(buffer)));

        return responseData;
    }

}