/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.jena.util;

import java.io.InputStream;

import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.apache.jena.rdf.model.Model ;
import org.apache.jena.shared.NotFoundException ;
import org.apache.jena.util.FileManager ;
import org.apache.jena.util.LocationMapper ;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TestFileManager extends TestCase
{
    static Logger log = LoggerFactory.getLogger(TestFileManager.class) ;
    static final String testingDir = "testing/FileManager" ;
    static final String filename = "fmgr-test-file" ; 
    static final String filenameNonExistent = "fmgr-test-file-1421" ;
    static final String fileModel = "foo.n3" ;
    static final String zipname = testingDir+"/fmgr-test.zip" ;
    
    public TestFileManager( String name )
    {
        super(name);
    }
    
    public static TestSuite suite()
    {
        return new TestSuite( TestFileManager.class );
    }

    public void testFileManagerFileLocator()
    {
        FileManager fileManager = new FileManager() ;
        fileManager.addLocatorFile() ;
        InputStream in = fileManager.open(testingDir+"/"+filename) ;
        assertNotNull(in) ;
        closeInputStream(in) ;
    }

    public void testFileManagerFileLocatorWithDir()
    {
        FileManager fileManager = new FileManager() ;
        fileManager.addLocatorFile(testingDir) ;
        InputStream in = fileManager.open(filename) ;
        assertNotNull(in) ;
        closeInputStream(in) ;
    }


    public void testFileManagerNoFile()
    {
        FileManager fileManager = new FileManager() ;
        fileManager.addLocatorFile() ;
        try {
            // Tests either way round - exception or a null return.
            InputStream in = fileManager.open(filenameNonExistent) ;
            closeInputStream(in) ;
            assertNull("Found non-existant file: "+filenameNonExistent, in) ;
        } catch (NotFoundException ex) {}
    }
    
    public void testFileManagerLocatorClassLoader()
    {
        FileManager fileManager = new FileManager() ;
        fileManager.addLocatorClassLoader(fileManager.getClass().getClassLoader()) ;
        InputStream in = fileManager.open("java/lang/String.class") ;
        assertNotNull(in) ;
        closeInputStream(in) ;
    }

    public void testFileManagerLocatorClassLoaderNotFound()
    {
        FileManager fileManager = new FileManager() ;
        fileManager.addLocatorClassLoader(fileManager.getClass().getClassLoader()) ;
        try {
            InputStream in = fileManager.open("not/java/lang/String.class") ;
            closeInputStream(in) ;
            assertNull("Found non-existant class", in) ;
        } catch (NotFoundException ex) {}
    }

    public void testFileManagerLocatorZip()
    {
        FileManager fileManager = new FileManager() ;
        try {
            fileManager.addLocatorZip(zipname) ;
        } catch (Exception ex)
        {
           fail("Failed to create a filemanager and add a zip locator") ;
        }
        InputStream in = fileManager.open(filename) ;
        assertNotNull(in) ;
        closeInputStream(in) ;
    }

    public void testFileManagerLocatorZipNonFound()
    {
        FileManager fileManager = new FileManager() ;
        try {
            fileManager.addLocatorZip(zipname) ;
        } catch (Exception ex)
        { fail("Failed to create a filemanager and add a zip locator") ; }
        try {
            InputStream in = fileManager.open(filenameNonExistent) ;
            closeInputStream(in) ;
            assertNull("Found non-existant zip file member", in) ;
        } catch (NotFoundException ex) {}
    }
    
    public void testFileManagerClone()
    {
        FileManager fileManager1 = new FileManager() ;
        FileManager fileManager2 = fileManager1.clone() ;
        
        // Should not affect fileManager2
        fileManager1.addLocatorFile() ;
        {
            InputStream in = fileManager1.open(testingDir+"/"+filename) ;
            assertNotNull(in) ;
            closeInputStream(in) ;
        }
        // Should not work.
        try {
            InputStream in = fileManager2.open(testingDir+"/"+filename) ;
            closeInputStream(in) ;
            assertNull("Found file via wrong FileManager", in) ;
        } catch (NotFoundException ex) {}
    }
    
    public void testLocationMappingURLtoFileOpen()
    {
        LocationMapper locMap = new LocationMapper(TestLocationMapper.mapping) ;
        FileManager fileManager = new FileManager(locMap) ;
        fileManager.addLocatorFile() ;
        InputStream in = fileManager.open("http://example.org/file") ;
        assertNotNull(in) ;
        closeInputStream(in) ;
    }

    public void testLocationMappingURLtoFileOpenNotFound()
    {
        LocationMapper locMap = new LocationMapper(TestLocationMapper.mapping) ;
        FileManager fileManager = new FileManager(locMap) ;
        fileManager.addLocatorClassLoader(fileManager.getClass().getClassLoader()) ;
        try {
            InputStream in = fileManager.open("http://example.org/file") ;
            closeInputStream(in) ;
            assertNull("Found nont-existant URL", null) ;
        } catch (NotFoundException ex) {}
    }

    public void testCache1()
    {
        FileManager fileManager = new FileManager() ;
        fileManager.addLocatorFile(testingDir) ;
        Model m1 = fileManager.loadModel(fileModel) ;
        Model m2 = fileManager.loadModel(fileModel) ;
        assertNotSame(m1, m2) ;
    }
    
    public void testCache2()
    {
        FileManager fileManager = FileManager.get() ;
        fileManager.addLocatorFile(testingDir) ;
        fileManager.setModelCaching(true) ;
        Model m1 = fileManager.loadModel(fileModel) ;
        Model m2 = fileManager.loadModel(fileModel) ;
        assertSame(m1, m2) ;
    }
    
    public void testCache3()
    {
        FileManager fileManager = FileManager.get() ;
        fileManager.addLocatorFile(testingDir) ;
        fileManager.setModelCaching(true) ;
        Model m1 = fileManager.loadModel(fileModel) ;
        Model m2 = fileManager.loadModel(fileModel) ;
        assertSame(m1, m2) ;
        
        fileManager.removeCacheModel(fileModel) ;
        Model m3 = fileManager.loadModel(fileModel) ;
        assertNotSame(m1, m3) ;
        
        fileManager.resetCache() ;
        Model m4 = fileManager.loadModel(fileModel) ;
        Model m5 = fileManager.loadModel(fileModel) ;

        assertSame(m4, m5) ;
        assertNotSame(m1, m4) ;
        assertNotSame(m3, m4) ;
    }
    
//    public void testFileManagerLocatorURL()
//    {
//        FileManager fileManager = new FileManager() ;
//        fileManager.addLocatorURL() ;
//        InputStream in = fileManager.open("http:///www.bbc.co.uk/") ;
//        //assertNotNull(in) ;
//        // Proxies matter.
//        if ( in == null )
//            log.warn("Failed to contact http:///www.bbc.co.uk/: maybe due to proxy issues") ;
//        
//        try { if ( in != null ) in.close() ; }
//        catch (Exception ex) {}
//    }

    
    // -------- Helpers
    
    private void closeInputStream(InputStream in)
    {
      try {
          if ( in != null )
              in.close() ;
      }
      catch (Exception ex) {}
    }
}
