/*
 *  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.harmony.tests.internal.net.www.protocol.file;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import junit.framework.TestCase;
import libcore.io.Streams;
import libcore.net.url.FileURLConnection;

/**
 * Tests for <code>FileURLConnection</code> class constructors and methods.
 */
public class FileURLConnectionTest extends TestCase {

    private static final String RESOURCE_NAME = "resources/test.rtf";

    private final ClassLoader loader = FileURLConnectionTest.class.getClassLoader();

    private URL createTempFileWithContent(String resourceName) throws IOException {
        InputStream is = null;
        OutputStream os = null;
        try {
            final URL url = loader.getResource(resourceName);
            assertNotNull("Cannot find test resource " + resourceName, url);
            is = url.openStream();
            File file = File.createTempFile("FileURLConnectionTest",
                    resourceName.substring(resourceName.indexOf(".")));
            os = new BufferedOutputStream(new FileOutputStream(file));
            Streams.copy(is, os);

            return new URL("file://" + file.getAbsolutePath());
        } finally {
            if (is != null) {
                is.close();
            }

            if (os != null) {
                os.close();
            }
        }
    }

    private String getContentType(String fileName) throws IOException {
        String resourceName = "resources/" + fileName;
        URL url = createTempFileWithContent(resourceName);
        return new FileURLConnection(url).getContentType();
    }

    public void testGetContentType() throws IOException {
        // Regression for HARMONY-4699
        assertEquals("text/rtf", getContentType("test.rtf"));
        // RI would return "content/unknown"
        assertEquals("application/msword", getContentType("test.doc"));
        assertEquals("text/html", getContentType("test.htx"));
        assertEquals("text/xml", getContentType("test.xml"));
        assertEquals("text/html",
                new FileURLConnection(new URL("file:///")).getContentType());
    }

    public void testGetInputStream() throws IOException {
        // Regression for Harmony-5737
        URL url = createTempFileWithContent(RESOURCE_NAME);
        assertNotNull(url);
        URL anchorUrl = new URL(url, "#anchor");
        assertNotNull("Cannot find test resource " + RESOURCE_NAME, anchorUrl);

        FileURLConnection conn = new FileURLConnection(anchorUrl);
        assertNotNull(conn.getInputStream());
    }

    public void testGetInputStream_localHost() throws IOException {
        // Regression for Harmony-5779
        URL url = createTempFileWithContent(RESOURCE_NAME);
        String localURLString = "file://localhost/" + url.getFile();
        URL localURL = new URL(localURLString);
        FileURLConnection conn = new FileURLConnection(localURL);
        assertNotNull(conn.getInputStream());
        assertEquals("file", conn.getURL().getProtocol());
    }

    public void testHeaderFunctions() throws IOException {
        URL url = createTempFileWithContent(RESOURCE_NAME);
        FileURLConnection conn = new FileURLConnection(url);
        assertNotNull(conn.getInputStream());
        assertEquals(conn.getContentType(), conn.getHeaderField("content-type"));

        url = createTempFileWithContent(RESOURCE_NAME);
        conn = new FileURLConnection(url);

        assertNotNull(conn.getInputStream());
        assertEquals(conn.getContentType(), conn.getHeaderField("content-type"));
        assertEquals(Integer.toString(conn.getContentLength()),
                conn.getHeaderField("content-length"));
        assertEquals(conn.getHeaderField(0), conn.getHeaderField("content-type"));
        assertEquals(conn.getHeaderField(1), conn.getHeaderField("content-length"));
        assertEquals(conn.getHeaderField(2), conn.getHeaderField("last-modified"));
        assertEquals("last-modified", conn.getHeaderFieldKey(2));
        assertEquals("content-length", conn.getHeaderFieldKey(1));
        assertEquals("content-type", conn.getHeaderFieldKey(0));
    }

    public void testHeader_BoundaryCheck() throws IOException {
        URL url = createTempFileWithContent(RESOURCE_NAME);
        URLConnection urlConnection = url.openConnection();
        assertNull(urlConnection.getHeaderField(Integer.MIN_VALUE));
        assertNull(urlConnection.getHeaderField(Integer.MAX_VALUE));
        assertNull(urlConnection.getHeaderFieldKey(Integer.MIN_VALUE));
        assertNull(urlConnection.getHeaderFieldKey(Integer.MAX_VALUE));
        assertNull(urlConnection.getHeaderField(null));
    }
}