/*
 * Copyright Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags and
 * the COPYRIGHT.txt file distributed with this work.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.teiid.query.resolver.command;

import org.teiid.api.exception.query.QueryMetadataException;
import org.teiid.api.exception.query.QueryResolverException;
import org.teiid.core.TeiidComponentException;
import org.teiid.metadata.Table.TriggerEvent;
import org.teiid.query.QueryPlugin;
import org.teiid.query.metadata.TempMetadataAdapter;
import org.teiid.query.resolver.CommandResolver;
import org.teiid.query.resolver.QueryResolver;
import org.teiid.query.resolver.util.ResolverUtil;
import org.teiid.query.sql.lang.Alter;
import org.teiid.query.sql.lang.AlterProcedure;
import org.teiid.query.sql.lang.AlterTrigger;
import org.teiid.query.sql.lang.Command;

public class AlterResolver implements CommandResolver {

	@Override
	public void resolveCommand(Command command, TempMetadataAdapter metadata,
			boolean resolveNullLiterals) throws QueryMetadataException,
			QueryResolverException, TeiidComponentException {
		Alter<? extends Command> alter = (Alter<? extends Command>)command;
		ResolverUtil.resolveGroup(alter.getTarget(), metadata);
		int type = Command.TYPE_QUERY;
		boolean viewTarget = true;
		if (alter instanceof AlterTrigger) {
			TriggerEvent event = ((AlterTrigger)alter).getEvent();
			switch (event) {
			case DELETE:
				type = Command.TYPE_DELETE;
				break;
			case INSERT:
				type = Command.TYPE_INSERT;
				break;
			case UPDATE:
				type = Command.TYPE_UPDATE;
				break;
			}
			if (((AlterTrigger)alter).isAfter()) {
			    viewTarget = false;
			}
		} else if (alter instanceof AlterProcedure) {
			type = Command.TYPE_STORED_PROCEDURE;
			viewTarget = false;
		}
		if (viewTarget && !QueryResolver.isView(alter.getTarget(), metadata)) {
			 throw new QueryResolverException(QueryPlugin.Event.TEIID30116, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30116, alter.getTarget()));
		}
		if (alter.getDefinition() != null) {
			QueryResolver.resolveCommand(alter.getDefinition(), alter.getTarget(), type, metadata.getDesignTimeMetadata(), false);
		}
	}

}
