/*
 * 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.Nullable;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.model.api.Rfc6020Mapping;
import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.DescriptionStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.ReferenceStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.StatusStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.TypeStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.TypedefEffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.TypedefStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.UnitsStatement;
import org.opendaylight.yangtools.yang.parser.spi.SubstatementValidator;
import org.opendaylight.yangtools.yang.parser.spi.TypeNamespace;
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.spi.source.SourceException;
import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.TypeDefEffectiveStatementImpl;

public class TypedefStatementImpl extends AbstractDeclaredStatement<QName> implements TypedefStatement {
    private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(Rfc6020Mapping
            .TYPEDEF)
            .add(Rfc6020Mapping.DEFAULT, 0, 1)
            .add(Rfc6020Mapping.DESCRIPTION, 0, 1)
            .add(Rfc6020Mapping.REFERENCE, 0, 1)
            .add(Rfc6020Mapping.STATUS, 0, 1)
            .add(Rfc6020Mapping.TYPE, 1, 1)
            .add(Rfc6020Mapping.UNITS, 0, 1)
            .build();

    protected TypedefStatementImpl(final StmtContext<QName, TypedefStatement, ?> context) {
        super(context);
    }

    public static class Definition extends
            AbstractStatementSupport<QName, TypedefStatement, EffectiveStatement<QName, TypedefStatement>> {

        public Definition() {
            super(Rfc6020Mapping.TYPEDEF);
        }

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

        @Override
        public TypedefStatement createDeclared(final StmtContext<QName, TypedefStatement, ?> ctx) {
            return new TypedefStatementImpl(ctx);
        }

        @Override
        public EffectiveStatement<QName, TypedefStatement> createEffective(
                final StmtContext<QName, TypedefStatement, EffectiveStatement<QName, TypedefStatement>> ctx) {
            return new TypeDefEffectiveStatementImpl(ctx);
        }

        @Override
        public void onStatementDefinitionDeclared(
                final StmtContext.Mutable<QName, TypedefStatement, EffectiveStatement<QName, TypedefStatement>> stmt) {
            if (stmt != null && stmt.getParentContext() != null) {
                final StmtContext<?, TypedefStatement, TypedefEffectiveStatement> existing =
                        stmt.getParentContext().getFromNamespace(TypeNamespace.class, stmt.getStatementArgument());
                SourceException.throwIf(existing != null, stmt.getStatementSourceReference(),
                        "Duplicate name for typedef %s", stmt.getStatementArgument());

                stmt.getParentContext().addContext(TypeNamespace.class, stmt.getStatementArgument(), stmt);
            }
        }

        @Override
        public void onFullDefinitionDeclared(final StmtContext.Mutable<QName, TypedefStatement,
                EffectiveStatement<QName, TypedefStatement>> stmt) throws SourceException {
            super.onFullDefinitionDeclared(stmt);
            SUBSTATEMENT_VALIDATOR.validate(stmt);
        }
    }

    @Nullable
    @Override
    public StatusStatement getStatus() {
        return firstDeclared(StatusStatement.class);
    }

    @Nullable
    @Override
    public DescriptionStatement getDescription() {
        return firstDeclared(DescriptionStatement.class);
    }

    @Nullable
    @Override
    public ReferenceStatement getReference() {
        return firstDeclared(ReferenceStatement.class);
    }

    @Override
    public TypeStatement getType() {
        return firstDeclared(TypeStatement.class);
    }

    @Override
    public UnitsStatement getUnits() {
        return firstDeclared(UnitsStatement.class);
    }

    @Override
    public QName getName() {
        return argument();
    }

}