/*
 * 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.stmt.rfc6020;

import javax.annotation.Nonnull;
import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.MandatoryStatement;
import org.opendaylight.yangtools.yang.parser.spi.SubstatementValidator;
import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractDeclaredStatement;
import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.MandatoryEffectiveStatementImpl;

public class MandatoryStatementImpl extends AbstractDeclaredStatement<Boolean> implements MandatoryStatement {
    private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
            .MANDATORY)
            .build();

    protected MandatoryStatementImpl(final StmtContext<Boolean, MandatoryStatement, ?> context) {
        super(context);
    }

    public static class Definition extends
        AbstractStatementSupport<Boolean, MandatoryStatement, EffectiveStatement<Boolean, MandatoryStatement>> {

        public Definition() {
            super(YangStmtMapping.MANDATORY);
        }

        @Override
        public Boolean parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
            return Boolean.valueOf(value);
        }

        @Override
        public MandatoryStatement createDeclared(final StmtContext<Boolean, MandatoryStatement, ?> ctx) {
            final MandatoryStatement ret = new MandatoryStatementImpl(ctx);
            if (EmptyMandatoryStatement.FALSE.equals(ret)) {
                return EmptyMandatoryStatement.FALSE;
            } else if (EmptyMandatoryStatement.TRUE.equals(ret)) {
                return EmptyMandatoryStatement.TRUE;
            } else {
                return ret;
            }
        }

        @Override
        public EffectiveStatement<Boolean, MandatoryStatement> createEffective(
                final StmtContext<Boolean, MandatoryStatement, EffectiveStatement<Boolean, MandatoryStatement>> ctx) {
            final EffectiveStatement<Boolean, MandatoryStatement> ret = new MandatoryEffectiveStatementImpl(ctx);
            final MandatoryStatement declared = ret.getDeclared();
            if (declared instanceof EmptyMandatoryStatement && ret.effectiveSubstatements().isEmpty()) {
                return ((EmptyMandatoryStatement)declared).toEffective();
            }
            return ret;
        }

        @Override
        protected SubstatementValidator getSubstatementValidator() {
            return SUBSTATEMENT_VALIDATOR;
        }
    }

    @Override
    @Nonnull public Boolean getValue() {
        return argument();
    }
}