/*
 * 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 org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.ConfigStatement;
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.ConfigEffectiveStatementImpl;

public class ConfigStatementImpl extends AbstractDeclaredStatement<Boolean> implements ConfigStatement {
    private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(
        YangStmtMapping.CONFIG).build();

    protected ConfigStatementImpl(final StmtContext<Boolean, ConfigStatement, ?> context) {
        super(context);
    }

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

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

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

        @Override
        public ConfigStatement createDeclared(final StmtContext<Boolean, ConfigStatement, ?> ctx) {
            final ConfigStatement ret = new ConfigStatementImpl(ctx);

            if (EmptyConfigStatement.FALSE.equals(ret)) {
                return EmptyConfigStatement.FALSE;
            } else if (EmptyConfigStatement.TRUE.equals(ret)) {
                return EmptyConfigStatement.TRUE;
            } else {
                return ret;
            }
        }

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

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

    @Override
    public boolean getValue() {
        return argument();
    }
}