/*
 * Copyright (c) 2013 Cisco Systems, Inc. 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.bgpcep.pcep.topology.provider;

import com.google.common.base.Function;
import com.google.common.collect.Lists;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;

import java.util.Collections;
import java.util.List;

import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.Errors;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.FailureType;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.OperationResult;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.operation.result.Error;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.operation.result.ErrorBuilder;
import org.opendaylight.yangtools.yang.binding.DataContainer;

/**
 *
 */
final class OperationResults implements OperationResult {
    static final OperationResults NOACK = new OperationResults(FailureType.NoAck);
    static final OperationResults SUCCESS = new OperationResults((FailureType)null);
    static final OperationResults UNSENT = new OperationResults(FailureType.Unsent);

    private static final Function<Errors, Error> CONVERT_ERRORS = new Function<Errors, Error>() {
        @Override
        public Error apply(final Errors input) {
            return new ErrorBuilder(input).build();
        }
    };

    private final FailureType failure;
    private final List<Error> error;

    private OperationResults(final FailureType failure) {
        this.failure = failure;
        this.error = null;
    }

    private OperationResults(final List<Error> error) {
        this.failure = FailureType.Failed;
        this.error = error;
    }

    ListenableFuture<OperationResult> future() {
        return Futures.<OperationResult> immediateFuture(this);
    }

    public static OperationResults createFailed(final List<Errors> errors) {
        final List<Errors> e = errors != null ? errors : Collections.<Errors>emptyList();
        return new OperationResults(Lists.transform(e, CONVERT_ERRORS));
    }

    @Override
    public FailureType getFailure() {
        return failure;
    }

    @Override
    public List<Error> getError() {
        return error;

    }
    @Override
    public Class<? extends DataContainer> getImplementedInterface() {
        return OperationResult.class;
    }
}