/*
 * 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.ftpserver.clienttests;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.nio.charset.StandardCharsets;

import org.apache.ftpserver.test.TestUtil;

/**
*
* @author <a href="http://mina.apache.org">Apache MINA Project</a>
*
*/
public class RetrieveTest extends ClientTestTemplate {
    private static final String TEST_FILENAME = "test.txt";

    private static final String TEST_FILENAME_WITH_LEADING_SPACE = " leading.txt";

    private static final File TEST_FILE = new File(ROOT_DIR, TEST_FILENAME);

    private static final File TEST_FILE_WITH_LEADING_SPACE = new File(ROOT_DIR,
            TEST_FILENAME_WITH_LEADING_SPACE);

    private static final String EOL = System.getProperty("line.separator");

    private static byte[] testData = null;

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.ftpserver.clienttests.ClientTestTemplate#setUp()
     */
    @Override
    protected void setUp() throws Exception {
        super.setUp();

        testData = ("TESTDATA" + EOL).getBytes(StandardCharsets.UTF_8);

        client.login(ADMIN_USERNAME, ADMIN_PASSWORD);
    }

    public void testRetrieve() throws Exception {

        TestUtil.writeDataToFile(TEST_FILE, testData);

        assertTrue(TEST_FILE.exists());

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        assertTrue(client.retrieveFile(TEST_FILENAME, baos));

        assertTrue(TEST_FILE.exists());
        TestUtil.assertArraysEqual(testData, baos.toByteArray());
    }

    public void testRetrieveWithLeadingSpace() throws Exception {

        TestUtil.writeDataToFile(TEST_FILE_WITH_LEADING_SPACE, testData);

        assertTrue(TEST_FILE_WITH_LEADING_SPACE.exists());

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        assertTrue(client.retrieveFile(TEST_FILENAME_WITH_LEADING_SPACE, baos));

        assertTrue(TEST_FILE_WITH_LEADING_SPACE.exists());
        TestUtil.assertArraysEqual(testData, baos.toByteArray());
    }

    public void testRetrieveNoFileName() throws Exception {
        assertEquals(501, client.sendCommand("RETR"));
    }

    public void testRetrieveInValidFileName() throws Exception {
        assertEquals(550, client.sendCommand("RETR foo:bar;foo"));
    }

    public void testRetrieveDirectory() throws Exception {
        TEST_FILE.mkdirs();
        assertEquals(550, client.sendCommand("RETR " + TEST_FILE.getName()));
    }

    public void testRetrieveWithRestart() throws Exception {
        int skipLen = 4;

        TestUtil.writeDataToFile(TEST_FILE, testData);

        assertTrue(TEST_FILE.exists());

        client.setRestartOffset(4);

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        assertTrue(client.retrieveFile(TEST_FILENAME, baos));

        int len = testData.length - skipLen;
        byte[] expected = new byte[len];
        System.arraycopy(testData, skipLen, expected, 0, len);

        assertTrue(TEST_FILE.exists());
        TestUtil.assertArraysEqual(expected, baos.toByteArray());
    }

    public void testRetrieveWithPath() throws Exception {
        File dir = new File(ROOT_DIR, "foo/bar");
        dir.mkdirs();

        File testFile = new File(dir, TEST_FILENAME);

        TestUtil.writeDataToFile(testFile, testData);

        assertTrue(testFile.exists());

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        assertTrue(client.retrieveFile("foo/bar/" + TEST_FILENAME, baos));

        assertTrue(testFile.exists());
        TestUtil.assertArraysEqual(testData, baos.toByteArray());
    }

    public void testRetrieveNonExistingFile() throws Exception {

        assertFalse(TEST_FILE.exists());

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        assertFalse(client.retrieveFile(TEST_FILENAME, baos));
    }
}