/*
 * Copyright (c) 2013 Pantheon Technologies s.r.o. and others. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */

package org.opendaylight.openflowjava.protocol.impl.deserialization.factories;

import io.netty.buffer.ByteBuf;

import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
import org.opendaylight.openflowjava.protocol.impl.util.EncodeConstants;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.ExperimenterError;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.ExperimenterErrorBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.BadActionCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.BadInstructionCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.BadMatchCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.BadRequestCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.ErrorType;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.FlowModFailedCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.GroupModFailedCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.HelloFailedCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.MeterModFailedCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.PortModFailedCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.QueueOpFailedCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.RoleRequestFailedCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.SwitchConfigFailedCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.TableFeaturesFailedCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.TableModFailedCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ErrorMessage;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ErrorMessageBuilder;

/**
 * Translates Error messages
 * @author michal.polkorab
 * @author timotej.kubas
 */
public class ErrorMessageFactory implements OFDeserializer<ErrorMessage> {

    private static final String UNKNOWN_CODE = "UNKNOWN_CODE";
    private static final String UNKNOWN_TYPE = "UNKNOWN_TYPE";

    @Override
    public ErrorMessage deserialize(ByteBuf rawMessage) {
        ErrorMessageBuilder builder = new ErrorMessageBuilder();
        builder.setVersion((short) EncodeConstants.OF13_VERSION_ID);
        builder.setXid(rawMessage.readUnsignedInt());
        int type = rawMessage.readUnsignedShort();
        ErrorType errorType = ErrorType.forValue(type);
        decodeType(builder, errorType, type);
        decodeCode(rawMessage, builder, errorType);
        if (rawMessage.readableBytes() > 0) {
            builder.setData(rawMessage.readBytes(rawMessage.readableBytes()).array());
        }
        return builder.build();
    }
    
    private static void decodeType(ErrorMessageBuilder builder, ErrorType type, int readValue) {
        if (type != null) {
            builder.setType(type.getIntValue());
            builder.setTypeString(type.name());
        } else {
            builder.setType(readValue);
            builder.setTypeString(UNKNOWN_TYPE);
        }
    }

    private static void decodeCode(ByteBuf rawMessage, ErrorMessageBuilder builder,
            ErrorType type) {
        int code = rawMessage.readUnsignedShort();
        if (type != null) {
            switch (type) {
            case HELLOFAILED:
            {
                HelloFailedCode errorCode = HelloFailedCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case BADREQUEST:
            {
                BadRequestCode errorCode = BadRequestCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case BADACTION:
            {
                BadActionCode errorCode = BadActionCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case BADINSTRUCTION:
            {
                BadInstructionCode errorCode = BadInstructionCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case BADMATCH:
            {
                BadMatchCode errorCode = BadMatchCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case FLOWMODFAILED:
            {
                FlowModFailedCode errorCode = FlowModFailedCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case GROUPMODFAILED:
            {
                GroupModFailedCode errorCode = GroupModFailedCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case PORTMODFAILED:
            {
                PortModFailedCode errorCode = PortModFailedCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case TABLEMODFAILED:
            {
                TableModFailedCode errorCode = TableModFailedCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case QUEUEOPFAILED:
            {
                QueueOpFailedCode errorCode = QueueOpFailedCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case SWITCHCONFIGFAILED:
            {
                SwitchConfigFailedCode errorCode = SwitchConfigFailedCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case ROLEREQUESTFAILED:
            {
                RoleRequestFailedCode errorCode = RoleRequestFailedCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case METERMODFAILED:
            {
                MeterModFailedCode errorCode = MeterModFailedCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case TABLEFEATURESFAILED:
            {
                TableFeaturesFailedCode errorCode = TableFeaturesFailedCode.forValue(code);
                if (errorCode != null) {
                    setCode(builder, errorCode.getIntValue(), errorCode.name());
                } else {
                    setUnknownCode(builder, code);
                }
                break;
            }
            case EXPERIMENTER:
                ExperimenterErrorBuilder expBuilder = new ExperimenterErrorBuilder();
                expBuilder.setExpType(code);
                expBuilder.setExperimenter(rawMessage.readUnsignedInt());
                builder.addAugmentation(ExperimenterError.class, expBuilder.build());
                break;
            default:
                setUnknownCode(builder, code);
                break;
            }
        } else {
            setUnknownCode(builder, code);
        }
    }
    
    private static void setUnknownCode(ErrorMessageBuilder builder, int readValue) {
        builder.setCode(readValue);
        builder.setCodeString(UNKNOWN_CODE);
    }
    
    private static void setCode(ErrorMessageBuilder builder, int code, String codeString) {
        builder.setCode(code);
        builder.setCodeString(codeString);
    }

}