/*
 * 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.translator.google;

import java.util.Arrays;
import java.util.List;

import org.teiid.resource.api.ConnectionFactory;

import org.teiid.core.BundleUtil;
import org.teiid.language.Argument;
import org.teiid.language.Call;
import org.teiid.language.Command;
import org.teiid.language.QueryExpression;
import org.teiid.language.Select;
import org.teiid.language.visitor.SQLStringVisitor;
import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.metadata.RuntimeMetadata;
import org.teiid.translator.ExecutionContext;
import org.teiid.translator.ExecutionFactory;
import org.teiid.translator.MetadataProcessor;
import org.teiid.translator.ProcedureExecution;
import org.teiid.translator.ResultSetExecution;
import org.teiid.translator.SourceSystemFunctions;
import org.teiid.translator.Translator;
import org.teiid.translator.TranslatorException;
import org.teiid.translator.UpdateExecution;
import org.teiid.translator.google.api.GoogleSpreadsheetConnection;

/**
 * Translator that is used to translate SQL to Google spreadsheet API. Translator uses Google Visualization API and Google Data API.
 * 
 * @author felias
 *
 */
@Translator(name="google-spreadsheet", description="A translator for Google Spreadsheet")
public class SpreadsheetExecutionFactory extends ExecutionFactory<ConnectionFactory, GoogleSpreadsheetConnection>{
	public static final BundleUtil UTIL = BundleUtil.getBundleUtil(SpreadsheetExecutionFactory.class);
	
	public SpreadsheetExecutionFactory() {
		setTransactionSupport(TransactionSupport.NONE);
	}
	
	@Override
	public void start() throws TranslatorException {
		super.start();
		LogManager.logTrace(LogConstants.CTX_CONNECTOR, "Google Spreadsheet ExecutionFactory Started"); //$NON-NLS-1$
	}

	@Override
	public ResultSetExecution createResultSetExecution(QueryExpression command, ExecutionContext executionContext, RuntimeMetadata metadata, GoogleSpreadsheetConnection connection)
			throws TranslatorException {
		return new SpreadsheetQueryExecution((Select)command, connection, executionContext);
	}
	
	@Override
	public UpdateExecution createUpdateExecution(Command command, ExecutionContext executionContext, RuntimeMetadata metadata, GoogleSpreadsheetConnection connection) throws TranslatorException {
		UpdateExecution result = new SpreadsheetUpdateExecution(command, connection, executionContext, metadata);
		return result;
	}
	
	@Override
	public ProcedureExecution createDirectExecution(List<Argument> arguments, Command command, ExecutionContext executionContext, RuntimeMetadata metadata, GoogleSpreadsheetConnection connection) throws TranslatorException {
		 return new DirectSpreadsheetQueryExecution((String)arguments.get(0).getArgumentValue().getValue(), arguments.subList(1, arguments.size()), executionContext, connection, true);
	}
	
	@Override
	public ProcedureExecution createProcedureExecution(Call command,
			ExecutionContext executionContext, RuntimeMetadata metadata,
			GoogleSpreadsheetConnection connection) throws TranslatorException {
		String nativeQuery = command.getMetadataObject().getProperty(SQLStringVisitor.TEIID_NATIVE_QUERY, false);
		if (nativeQuery != null) {
			return new DirectSpreadsheetQueryExecution(nativeQuery, command.getArguments(), executionContext, connection, false);
		}
		throw new TranslatorException("Missing native-query extension metadata."); //$NON-NLS-1$
	}
	
	@Override
    public MetadataProcessor<GoogleSpreadsheetConnection> getMetadataProcessor(){
	    return new GoogleMetadataProcessor();
	}
	
	@Override
	public boolean supportsCompareCriteriaEquals() {
		return true;
	}

	@Override
	public boolean supportsInCriteria() {
		return false;
	}

	@Override
	public boolean supportsLikeCriteria() {
		return true;
	}

	@Override
	public boolean supportsOrCriteria() {
		return true;
	}

	@Override
	public boolean supportsNotCriteria() {
		return true;
	}

	@Override
	public boolean supportsAggregatesCount() {
		return true;
	}

	@Override
	public boolean supportsAggregatesMax() {
		return true;
	}

	@Override
	public boolean supportsAggregatesMin() {
		return true;
	}

	@Override
	public boolean supportsAggregatesSum() {
		return true;
	}

	@Override
	public boolean supportsAggregatesAvg() {
		return true;
	}

	@Override
	public boolean supportsGroupBy() {
		return true;
	}

	@Override
	public boolean supportsOrderBy() {
		return false;
	}

	@Override
	public boolean supportsHaving() {
		return false;
	}

	@Override
	public boolean supportsCompareCriteriaOrdered() {
		return true;
	}

	@Override
	public boolean supportsRowLimit() {
		return true;
	}

	@Override
	public boolean supportsRowOffset() {
		return true;
	}

	@Override
	public List<String> getSupportedFunctions() {
		return Arrays.asList(SourceSystemFunctions.YEAR,
				SourceSystemFunctions.MONTH, SourceSystemFunctions.DAYOFMONTH,
				SourceSystemFunctions.HOUR, SourceSystemFunctions.MINUTE,
				SourceSystemFunctions.SECOND, SourceSystemFunctions.QUARTER,
				SourceSystemFunctions.DAYOFWEEK, SourceSystemFunctions.UCASE,
				SourceSystemFunctions.LCASE);
	}
	
}
