//
//  ========================================================================
//  Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.servlets;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.net.URL;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.Locale;
import java.util.Set;
import javax.servlet.DispatcherType;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jetty.http.HttpTester;
import org.eclipse.jetty.servlet.FilterHolder;
import org.eclipse.jetty.servlet.ServletTester;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.IO;
import org.eclipse.jetty.util.StringUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class PutFilterTest
{
    private File _dir;
    private ServletTester tester;

    @Before
    public void setUp() throws Exception
    {
        _dir = File.createTempFile("testPutFilter",null);
        assertTrue(_dir.delete());
        assertTrue(_dir.mkdir());
        _dir.deleteOnExit();
        assertTrue(_dir.isDirectory());

        tester=new ServletTester("/context");
        tester.setResourceBase(_dir.getCanonicalPath());
        tester.addServlet(org.eclipse.jetty.servlet.DefaultServlet.class, "/");
        FilterHolder holder = tester.addFilter(PutFilter.class,"/*",EnumSet.of(DispatcherType.REQUEST));
        holder.setInitParameter("delAllowed","true");
        // Bloody Windows does not allow file renaming
        if (!System.getProperty("os.name").toLowerCase(Locale.ENGLISH).contains("windows"))
            holder.setInitParameter("putAtomic","true");
        tester.start();
    }

    @After
    public void tearDown() throws Exception
    {
        tester.stop();
        IO.delete(_dir);
    }

    @Test
    public void testHandlePut() throws Exception
    {
        // generated and parsed test
        HttpTester.Request request = HttpTester.newRequest();
        HttpTester.Response response;

        // test GET
        request.setMethod("GET");
        request.setVersion("HTTP/1.0");
        request.setHeader("Host","tester");
        request.setURI("/context/file.txt");
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        assertEquals(HttpServletResponse.SC_NOT_FOUND,response.getStatus());

        // test PUT0
        request.setMethod("PUT");
        request.setURI("/context/file.txt");
        request.setHeader("Content-Type","text/plain");
        String data0="Now is the time for all good men to come to the aid of the party";
        request.setContent(data0);
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        assertEquals(HttpServletResponse.SC_CREATED,response.getStatus());

        File file=new File(_dir,"file.txt");
        assertTrue(file.exists());
        assertEquals(data0,IO.toString(new FileInputStream(file)));

        // test GET1
        request.setMethod("GET");
        request.setVersion("HTTP/1.0");
        request.setHeader("Host","tester");
        request.setURI("/context/file.txt");
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        assertEquals(HttpServletResponse.SC_OK,response.getStatus());
        assertEquals(data0,response.getContent());

        // test PUT1
        request.setMethod("PUT");
        request.setURI("/context/file.txt");
        request.setHeader("Content-Type","text/plain");
        String data1="How Now BROWN COW!!!!";
        request.setContent(data1);
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        assertEquals(HttpServletResponse.SC_OK,response.getStatus());

        file=new File(_dir,"file.txt");
        assertTrue(file.exists());
        assertEquals(data1,IO.toString(new FileInputStream(file)));

        // test PUT2
        request.setMethod("PUT");
        request.setURI("/context/file.txt");
        request.setHeader("Content-Type","text/plain");
        String data2="Blah blah blah Blah blah";
        request.setContent(data2);
        String to_send = BufferUtil.toString(request.generate());
        URL url = new URL(tester.createConnector(true));
        Socket socket=new Socket(url.getHost(),url.getPort());
        OutputStream out = socket.getOutputStream();
        int l = to_send.length();
        out.write(to_send.substring(0,l-10).getBytes());
        out.flush();
        Thread.sleep(100);
        out.write(to_send.substring(l-10,l-5).getBytes());
        out.flush();


        // loop until the resource is hidden (ie the PUT is starting to
        // read the file
        do
        {
            Thread.sleep(100);

            // test GET
            request.setMethod("GET");
            request.setVersion("HTTP/1.0");
            request.setHeader("Host","tester");
            request.setURI("/context/file.txt");
            response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        }
        while(response.getStatus()==200);
        assertEquals(HttpServletResponse.SC_NOT_FOUND,response.getStatus());

        out.write(to_send.substring(l-5).getBytes());
        out.flush();
        String in=IO.toString(socket.getInputStream());

        request.setMethod("GET");
        request.setVersion("HTTP/1.0");
        request.setHeader("Host","tester");
        request.setURI("/context/file.txt");
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        assertEquals(HttpServletResponse.SC_OK,response.getStatus());
        assertEquals(data2,response.getContent());
    }

    @Test
    public void testHandleDelete() throws Exception
    {
        // generated and parsed test
        HttpTester.Request request = HttpTester.newRequest();
        HttpTester.Response response;

        // test PUT1
        request.setMethod("PUT");
        request.setVersion("HTTP/1.0");
        request.setHeader("Host","tester");
        request.setURI("/context/file.txt");
        request.setHeader("Content-Type","text/plain");
        String data1="How Now BROWN COW!!!!";
        request.setContent(data1);
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        assertEquals(HttpServletResponse.SC_CREATED,response.getStatus());

        File file=new File(_dir,"file.txt");
        assertTrue(file.exists());
        try (InputStream fis = new FileInputStream(file))
        {
            assertEquals(data1,IO.toString(fis));
        }

        request.setMethod("DELETE");
        request.setURI("/context/file.txt");
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        assertEquals(HttpServletResponse.SC_NO_CONTENT,response.getStatus());

        assertTrue(!file.exists());

        request.setMethod("DELETE");
        request.setURI("/context/file.txt");
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        assertEquals(HttpServletResponse.SC_FORBIDDEN,response.getStatus());
    }

    @Test
    public void testHandleMove() throws Exception
    {
        // generated and parsed test
        HttpTester.Request request = HttpTester.newRequest();
        HttpTester.Response response;

        // test PUT1
        request.setMethod("PUT");
        request.setVersion("HTTP/1.0");
        request.setHeader("Host","tester");
        request.setURI("/context/file.txt");
        request.setHeader("Content-Type","text/plain");
        String data1="How Now BROWN COW!!!!";
        request.setContent(data1);
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));

        assertEquals(HttpServletResponse.SC_CREATED,response.getStatus());

        File file=new File(_dir,"file.txt");
        assertTrue(file.exists());
        try (InputStream fis = new FileInputStream(file))
        {
            assertEquals(data1,IO.toString(fis));
        }

        request.setMethod("MOVE");
        request.setURI("/context/file.txt");
        request.setHeader("new-uri","/context/blah.txt");
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        assertEquals(HttpServletResponse.SC_NO_CONTENT,response.getStatus());

        assertTrue(!file.exists());

        File n_file=new File(_dir,"blah.txt");
        assertTrue(n_file.exists());
    }

    @Test
    public void testHandleOptions() throws Exception
    {
        // generated and parsed test
        HttpTester.Request request = HttpTester.newRequest();
        HttpTester.Response response;

        // test PUT1
        request.setMethod("OPTIONS");
        request.setVersion("HTTP/1.0");
        request.put("Host","tester");
        request.setURI("/context/file.txt");
        response = HttpTester.parseResponse(tester.getResponses(request.generate()));
        assertEquals(HttpServletResponse.SC_OK,response.getStatus());

        Set<String> options = new HashSet<String>();
        String allow=response.get("Allow");
        options.addAll(StringUtil.csvSplit(null,allow,0,allow.length()));
        assertTrue(options.contains("GET"));
        assertTrue(options.contains("POST"));
        assertTrue(options.contains("PUT"));
        assertTrue(options.contains("MOVE"));

    }

    @Test
    public void testPassConditionalHeaders()
    {
        // TODO implement
    }
}
