/*
 * Copyright (c) 2015 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.yangtools.yang.parser.rfc7950.stmt.must;

import java.util.Optional;
import org.opendaylight.yangtools.yang.model.api.MustDefinition;
import org.opendaylight.yangtools.yang.model.api.RevisionAwareXPath;
import org.opendaylight.yangtools.yang.model.api.stmt.DescriptionEffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.ErrorAppTagEffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.ErrorMessageEffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.MustEffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.MustStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.ReferenceEffectiveStatement;
import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.DeclaredEffectiveStatementBase;
import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;

final class MustEffectiveStatementImpl extends DeclaredEffectiveStatementBase<RevisionAwareXPath, MustStatement>
        implements MustDefinition, MustEffectiveStatement {

    private final RevisionAwareXPath xpath;
    private final String description;
    private final String errorAppTag;
    private final String errorMessage;
    private final String reference;

    MustEffectiveStatementImpl(final StmtContext<RevisionAwareXPath, MustStatement, ?> ctx) {
        super(ctx);
        xpath = ctx.getStatementArgument();
        description = findFirstEffectiveSubstatementArgument(DescriptionEffectiveStatement.class).orElse(null);
        errorAppTag = findFirstEffectiveSubstatementArgument(ErrorAppTagEffectiveStatement.class).orElse(null);
        errorMessage = findFirstEffectiveSubstatementArgument(ErrorMessageEffectiveStatement.class).orElse(null);
        reference = findFirstEffectiveSubstatementArgument(ReferenceEffectiveStatement.class).orElse(null);
    }

    @Override
    public RevisionAwareXPath getXpath() {
        return xpath;
    }

    @Override
    public Optional<String> getDescription() {
        return Optional.ofNullable(description);
    }

    @Override
    public Optional<String> getErrorAppTag() {
        return Optional.ofNullable(errorAppTag);
    }

    @Override
    public Optional<String> getErrorMessage() {
        return Optional.ofNullable(errorMessage);
    }

    @Override
    public Optional<String> getReference() {
        return Optional.ofNullable(reference);
    }

    @Override
    public String toString() {
        return xpath.getOriginalString();
    }
}