/*
 * 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.dqp.service.buffer;

import static org.junit.Assert.*;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.junit.Test;
import org.teiid.common.buffer.BufferManager;
import org.teiid.common.buffer.BufferManager.TupleSourceType;
import org.teiid.common.buffer.FileStore;
import org.teiid.common.buffer.TupleBatch;
import org.teiid.common.buffer.TupleBuffer;
import org.teiid.common.buffer.impl.BufferFrontedFileStoreCache;
import org.teiid.common.buffer.impl.BufferManagerImpl;
import org.teiid.common.buffer.impl.FileStorageManager;
import org.teiid.common.buffer.impl.SplittableStorageManager;
import org.teiid.core.types.DataTypeManager;
import org.teiid.core.types.DataTypeManager.DefaultDataTypes;
import org.teiid.core.util.UnitTestUtil;
import org.teiid.query.sql.symbol.Constant;
import org.teiid.query.sql.symbol.ElementSymbol;
import org.teiid.query.sql.symbol.Expression;
import org.teiid.services.BufferServiceImpl;

@SuppressWarnings("nls")
public class TestLocalBufferService {

    @Test public void testCheckMemPropertyGotSet() throws Exception {
        BufferServiceImpl svc = new BufferServiceImpl();
        svc.setDiskDirectory(UnitTestUtil.getTestScratchPath()+"/teiid/1");
        svc.setUseDisk(true);
        svc.setInlineLobs(false);
        svc.start();
        // all the properties are set
        assertTrue("Not Directory", svc.getBufferDirectory().isDirectory()); //$NON-NLS-1$
        assertTrue("does not exist", svc.getBufferDirectory().exists()); //$NON-NLS-1$
        assertTrue("does not end with one", svc.getBufferDirectory().getParent().endsWith("1")); //$NON-NLS-1$ //$NON-NLS-2$
        assertTrue(svc.isUseDisk());
        assertFalse(svc.isInlineLobs());
        BufferManagerImpl mgr = svc.getBufferManager();
        SplittableStorageManager ssm = (SplittableStorageManager)((BufferFrontedFileStoreCache)mgr.getCache()).getStorageManager();
        assertTrue(((FileStorageManager)ssm.getStorageManager()).getDirectory().endsWith(svc.getBufferDirectory().getName()));
    }

    @Test public void testCheckMemPropertyGotSet2() throws Exception {
        BufferServiceImpl svc = new BufferServiceImpl();
        svc.setDiskDirectory(UnitTestUtil.getTestScratchPath()+"/teiid/1");
        svc.setUseDisk(false);
        svc.start();
        
        // all the properties are set
        assertFalse(svc.isUseDisk());
    }
    
    @Test public void testSchemaSize() throws Exception {
    	//82 strings of Total Length 2515 charcacters
    	//11 Dates
    	//1 Long
    	//1 short
    	//20 bigdecimal with 671 total integers in them.
    	List<Expression> schema = new ArrayList<Expression>();
    	for (int i = 0; i <82; i++) {
    		schema.add(new Constant(null, DataTypeManager.DefaultDataClasses.STRING));
    	}
    	for (int i = 0; i <11; i++) {
    		schema.add(new Constant(null, DataTypeManager.DefaultDataClasses.DATE));
    	}
    	schema.add(new Constant(null, DataTypeManager.DefaultDataClasses.LONG));
    	schema.add(new Constant(null, DataTypeManager.DefaultDataClasses.SHORT));
    	for (int i = 0; i <20; i++) {
    		schema.add(new Constant(null, DataTypeManager.DefaultDataClasses.BIG_DECIMAL));
    	}
    	
    	BufferServiceImpl svc = new BufferServiceImpl();
        svc.setDiskDirectory(UnitTestUtil.getTestScratchPath()+"/teiid/1");
        svc.setUseDisk(false);
        svc.start();
        
        BufferManager mgr = svc.getBufferManager();
        assertEquals(3364096, mgr.getSchemaSize(schema));
        assertEquals(128, mgr.getProcessorBatchSize(schema));
    }
    
    @Test
    public void testStateTransfer() throws Exception {
    	BufferServiceImpl svc = new BufferServiceImpl();
        svc.setDiskDirectory(UnitTestUtil.getTestScratchPath()+"/teiid/1");
        svc.setUseDisk(true);
        svc.start();
    	
        BufferManager mgr = svc.getBufferManager();
		List<ElementSymbol> schema = new ArrayList<ElementSymbol>(2);
		ElementSymbol es = new ElementSymbol("x"); //$NON-NLS-1$
		es.setType(DataTypeManager.getDataTypeClass(DefaultDataTypes.STRING));
		schema.add(es);
		
		ElementSymbol es2 = new ElementSymbol("y"); //$NON-NLS-1$
		es2.setType(DataTypeManager.getDataTypeClass(DefaultDataTypes.INTEGER));
		schema.add(es2);
		
		TupleBuffer buffer = mgr.createTupleBuffer(schema, "cached", TupleSourceType.FINAL); //$NON-NLS-1$
		buffer.setBatchSize(50);
		buffer.setId("state_id");
		
		for (int batch=0; batch<3; batch++) {
			for (int row = 0; row < 50; row++) {
				int val = (batch*50)+row;
				buffer.addTuple(Arrays.asList(new Object[] {"String"+val, new Integer(val)}));
			}
		}
		buffer.close();
		mgr.distributeTupleBuffer(buffer.getId(), buffer);
		
		FileOutputStream fo = new FileOutputStream(UnitTestUtil.getTestScratchPath()+"/teiid/statetest");
		((BufferManagerImpl)mgr).getState(buffer.getId(), fo);
		fo.close();
		svc.stop();
		
		// now read back
    	BufferServiceImpl svc2 = new BufferServiceImpl();
        svc2.setDiskDirectory(UnitTestUtil.getTestScratchPath()+"/teiid/2");
        svc2.setUseDisk(true);
        svc2.start();
    	
        BufferManagerImpl mgr2 = svc2.getBufferManager();
        FileInputStream fis = new FileInputStream(UnitTestUtil.getTestScratchPath()+"/teiid/statetest");
		mgr2.setState(buffer.getId(), fis);
		fis.close();
		
		String id = "state_id";
		buffer = mgr2.getTupleBuffer(id);
		for (int batch=0; batch<3; batch++) {
			TupleBatch tb = buffer.getBatch((batch*50)+1);
			List[] rows = tb.getAllTuples();
			for (int row = 0; row < 50; row++) {
				int val = (batch*50)+row;
				assertEquals("String"+val, rows[row].get(0));
				assertEquals(val, rows[row].get(1));
			}
		}
		svc2.stop();
    }
    
    @Test public void testUseDiskFalse() throws Exception {
        BufferServiceImpl svc = new BufferServiceImpl();
        svc.setDiskDirectory(UnitTestUtil.getTestScratchPath()+"/teiid/1");
        svc.setUseDisk(false);
        svc.start();
        // all the properties are set
        BufferManagerImpl mgr = svc.getBufferManager();
        FileStore f = mgr.getCache().createFileStore("x");
        f.write(new byte[1234], 0, 1234);
    }
}
