/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Pierre Phaneuf <pp@ludusdesign.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "TestHarness.h"

#include "nsIThread.h"
#include "nsIRunnable.h"
#include "nsThreadUtils.h"
#include "prprf.h"
#include "prinrval.h"
#include "nsCRT.h"
#include "nsIPipe.h"    // new implementation

#include "mozilla/Monitor.h"
using namespace mozilla;

/** NS_NewPipe2 reimplemented, because it's not exported by XPCOM */
nsresult TP_NewPipe2(nsIAsyncInputStream** input,
                     nsIAsyncOutputStream** output,
                     bool nonBlockingInput,
                     bool nonBlockingOutput,
                     PRUint32 segmentSize,
                     PRUint32 segmentCount,
                     nsIMemory* segmentAlloc)
{
  nsCOMPtr<nsIPipe> pipe = do_CreateInstance("@mozilla.org/pipe;1");
  if (!pipe)
    return NS_ERROR_OUT_OF_MEMORY;

  nsresult rv = pipe->Init(nonBlockingInput,
                           nonBlockingOutput,
                           segmentSize,
                           segmentCount,
                           segmentAlloc);

  if (NS_FAILED(rv))
    return rv;

  pipe->GetInputStream(input);
  pipe->GetOutputStream(output);
  return NS_OK;
}

/** NS_NewPipe reimplemented, because it's not exported by XPCOM */
#define TP_DEFAULT_SEGMENT_SIZE  4096
nsresult TP_NewPipe(nsIInputStream **pipeIn,
                    nsIOutputStream **pipeOut,
                    PRUint32 segmentSize = 0,
                    PRUint32 maxSize = 0,
                    bool nonBlockingInput = false,
                    bool nonBlockingOutput = false,
                    nsIMemory *segmentAlloc = nsnull);
nsresult TP_NewPipe(nsIInputStream **pipeIn,
                    nsIOutputStream **pipeOut,
                    PRUint32 segmentSize,
                    PRUint32 maxSize,
                    bool nonBlockingInput,
                    bool nonBlockingOutput,
                    nsIMemory *segmentAlloc)
{
    if (segmentSize == 0)
        segmentSize = TP_DEFAULT_SEGMENT_SIZE;

    // Handle maxSize of PR_UINT32_MAX as a special case
    PRUint32 segmentCount;
    if (maxSize == PR_UINT32_MAX)
        segmentCount = PR_UINT32_MAX;
    else
        segmentCount = maxSize / segmentSize;

    nsIAsyncInputStream *in;
    nsIAsyncOutputStream *out;
    nsresult rv = TP_NewPipe2(&in, &out, nonBlockingInput, nonBlockingOutput,
                              segmentSize, segmentCount, segmentAlloc);
    if (NS_FAILED(rv)) return rv;

    *pipeIn = in;
    *pipeOut = out;
    return NS_OK;
}


#define KEY             0xa7
#define ITERATIONS      33333
char kTestPattern[] = "My hovercraft is full of eels.\n";

bool gTrace = false;

static nsresult
WriteAll(nsIOutputStream *os, const char *buf, PRUint32 bufLen, PRUint32 *lenWritten)
{
    const char *p = buf;
    *lenWritten = 0;
    while (bufLen) {
        PRUint32 n;
        nsresult rv = os->Write(p, bufLen, &n);
        if (NS_FAILED(rv)) return rv;
        p += n;
        bufLen -= n;
        *lenWritten += n;
    }
    return NS_OK;
}

class nsReceiver : public nsIRunnable {
public:
    NS_DECL_ISUPPORTS

    NS_IMETHOD Run() {
        nsresult rv;
        char buf[101];
        PRUint32 count;
        PRIntervalTime start = PR_IntervalNow();
        while (true) {
            rv = mIn->Read(buf, 100, &count);
            if (NS_FAILED(rv)) {
                printf("read failed\n");
                break;
            }
            if (count == 0) {
//                printf("EOF count = %d\n", mCount);
                break;
            }

            if (gTrace) {
                buf[count] = '\0';
                printf("read: %s\n", buf);
            }
            mCount += count;
        }
        PRIntervalTime end = PR_IntervalNow();
        printf("read  %d bytes, time = %dms\n", mCount,
               PR_IntervalToMilliseconds(end - start));
        return rv;
    }

    nsReceiver(nsIInputStream* in) : mIn(in), mCount(0) {
    }

    PRUint32 GetBytesRead() { return mCount; }

protected:
    nsCOMPtr<nsIInputStream> mIn;
    PRUint32            mCount;
};

NS_IMPL_THREADSAFE_ISUPPORTS1(nsReceiver, nsIRunnable)

nsresult
TestPipe(nsIInputStream* in, nsIOutputStream* out)
{
    nsCOMPtr<nsReceiver> receiver = new nsReceiver(in);
    if (!receiver)
        return NS_ERROR_OUT_OF_MEMORY;

    nsresult rv;

    nsCOMPtr<nsIThread> thread;
    rv = NS_NewThread(getter_AddRefs(thread), receiver);
    if (NS_FAILED(rv)) return rv;

    PRUint32 total = 0;
    PRIntervalTime start = PR_IntervalNow();
    for (PRUint32 i = 0; i < ITERATIONS; i++) {
        PRUint32 writeCount;
        char *buf = PR_smprintf("%d %s", i, kTestPattern);
        PRUint32 len = strlen(buf);
        rv = WriteAll(out, buf, len, &writeCount);
        if (gTrace) {
            printf("wrote: ");
            for (PRUint32 j = 0; j < writeCount; j++) {
                putc(buf[j], stdout);
            }
            printf("\n");
        }
        PR_smprintf_free(buf);
        if (NS_FAILED(rv)) return rv;
        total += writeCount;
    }
    rv = out->Close();
    if (NS_FAILED(rv)) return rv;

    PRIntervalTime end = PR_IntervalNow();

    thread->Shutdown();

    printf("wrote %d bytes, time = %dms\n", total,
           PR_IntervalToMilliseconds(end - start));
    NS_ASSERTION(receiver->GetBytesRead() == total, "didn't read everything");

    return NS_OK;
}

////////////////////////////////////////////////////////////////////////////////

class nsShortReader : public nsIRunnable {
public:
    NS_DECL_ISUPPORTS

    NS_IMETHOD Run() {
        nsresult rv;
        char buf[101];
        PRUint32 count;
        PRUint32 total = 0;
        while (true) {
            //if (gTrace)
            //    printf("calling Read\n");
            rv = mIn->Read(buf, 100, &count);
            if (NS_FAILED(rv)) {
                printf("read failed\n");
                break;
            }
            if (count == 0) {
                break;
            }

            if (gTrace) {
                // For next |printf()| call and possible others elsewhere.
                buf[count] = '\0';

                printf("read %d bytes: %s\n", count, buf);
            }

            Received(count);
            total += count;
        }
        printf("read  %d bytes\n", total);
        return rv;
    }

    nsShortReader(nsIInputStream* in) : mIn(in), mReceived(0) {
        mMon = new Monitor("nsShortReader");
    }

    void Received(PRUint32 count) {
        MonitorAutoEnter mon(*mMon);
        mReceived += count;
        mon.Notify();
    }

    PRUint32 WaitForReceipt(const PRUint32 aWriteCount) {
        MonitorAutoEnter mon(*mMon);
        PRUint32 result = mReceived;

        while (result < aWriteCount) {
            mon.Wait();

            NS_ASSERTION(mReceived > result, "failed to receive");
            result = mReceived;
        }

        mReceived = 0;
        return result;
    }

protected:
    nsCOMPtr<nsIInputStream> mIn;
    PRUint32                 mReceived;
    Monitor*                 mMon;
};

NS_IMPL_THREADSAFE_ISUPPORTS1(nsShortReader, nsIRunnable)

nsresult
TestShortWrites(nsIInputStream* in, nsIOutputStream* out)
{
    nsCOMPtr<nsShortReader> receiver = new nsShortReader(in);
    if (!receiver)
        return NS_ERROR_OUT_OF_MEMORY;

    nsresult rv;

    nsCOMPtr<nsIThread> thread;
    rv = NS_NewThread(getter_AddRefs(thread), receiver);
    if (NS_FAILED(rv)) return rv;

    PRUint32 total = 0;
    for (PRUint32 i = 0; i < ITERATIONS; i++) {
        PRUint32 writeCount;
        char* buf = PR_smprintf("%d %s", i, kTestPattern);
        PRUint32 len = strlen(buf);
        len = len * rand() / RAND_MAX;
        len = NS_MAX(1, len);
        rv = WriteAll(out, buf, len, &writeCount);
        if (NS_FAILED(rv)) return rv;
        NS_ASSERTION(writeCount == len, "didn't write enough");
        total += writeCount;

        if (gTrace)
            printf("wrote %d bytes: %s\n", writeCount, buf);
        PR_smprintf_free(buf);
        //printf("calling Flush\n");
        out->Flush();
        //printf("calling WaitForReceipt\n");

#ifdef DEBUG
        const PRUint32 received =
#endif
          receiver->WaitForReceipt(writeCount);
        NS_ASSERTION(received == writeCount, "received wrong amount");
    }
    rv = out->Close();
    if (NS_FAILED(rv)) return rv;

    thread->Shutdown();

    printf("wrote %d bytes\n", total);

    return NS_OK;
}

////////////////////////////////////////////////////////////////////////////////

class nsPump : public nsIRunnable
{
public:
    NS_DECL_ISUPPORTS

    NS_IMETHOD Run() {
        nsresult rv;
        PRUint32 count;
        while (true) {
            rv = mOut->WriteFrom(mIn, ~0U, &count);
            if (NS_FAILED(rv)) {
                printf("Write failed\n");
                break;
            }
            if (count == 0) {
                printf("EOF count = %d\n", mCount);
                break;
            }

            if (gTrace) {
                printf("Wrote: %d\n", count);
            }
            mCount += count;
        }
        mOut->Close();
        return rv;
    }

    nsPump(nsIInputStream* in,
           nsIOutputStream* out)
        : mIn(in), mOut(out), mCount(0) {
    }

protected:
    nsCOMPtr<nsIInputStream>      mIn;
    nsCOMPtr<nsIOutputStream>     mOut;
    PRUint32                            mCount;
};

NS_IMPL_THREADSAFE_ISUPPORTS1(nsPump,
                              nsIRunnable)

nsresult
TestChainedPipes()
{
    nsresult rv;
    printf("TestChainedPipes\n");

    nsCOMPtr<nsIInputStream> in1;
    nsCOMPtr<nsIOutputStream> out1;
    rv = TP_NewPipe(getter_AddRefs(in1), getter_AddRefs(out1), 20, 1999);
    if (NS_FAILED(rv)) return rv;

    nsCOMPtr<nsIInputStream> in2;
    nsCOMPtr<nsIOutputStream> out2;
    rv = TP_NewPipe(getter_AddRefs(in2), getter_AddRefs(out2), 200, 401);
    if (NS_FAILED(rv)) return rv;

    nsCOMPtr<nsPump> pump = new nsPump(in1, out2);
    if (pump == nsnull) return NS_ERROR_OUT_OF_MEMORY;

    nsCOMPtr<nsIThread> thread;
    rv = NS_NewThread(getter_AddRefs(thread), pump);
    if (NS_FAILED(rv)) return rv;

    nsCOMPtr<nsReceiver> receiver = new nsReceiver(in2);
    if (receiver == nsnull) return NS_ERROR_OUT_OF_MEMORY;

    nsCOMPtr<nsIThread> receiverThread;
    rv = NS_NewThread(getter_AddRefs(receiverThread), receiver);
    if (NS_FAILED(rv)) return rv;

    PRUint32 total = 0;
    for (PRUint32 i = 0; i < ITERATIONS; i++) {
        PRUint32 writeCount;
        char* buf = PR_smprintf("%d %s", i, kTestPattern);
        PRUint32 len = strlen(buf);
        len = len * rand() / RAND_MAX;
        len = NS_MAX(1, len);
        rv = WriteAll(out1, buf, len, &writeCount);
        if (NS_FAILED(rv)) return rv;
        NS_ASSERTION(writeCount == len, "didn't write enough");
        total += writeCount;

        if (gTrace)
            printf("wrote %d bytes: %s\n", writeCount, buf);

        PR_smprintf_free(buf);
    }
    printf("wrote total of %d bytes\n", total);
    rv = out1->Close();
    if (NS_FAILED(rv)) return rv;

    thread->Shutdown();
    receiverThread->Shutdown();

    return NS_OK;
}

////////////////////////////////////////////////////////////////////////////////

void
RunTests(PRUint32 segSize, PRUint32 segCount)
{
    nsresult rv;
    nsCOMPtr<nsIInputStream> in;
    nsCOMPtr<nsIOutputStream> out;
    PRUint32 bufSize = segSize * segCount;
    printf("Testing New Pipes: segment size %d buffer size %d\n", segSize, bufSize);

    printf("Testing long writes...\n");
    rv = TP_NewPipe(getter_AddRefs(in), getter_AddRefs(out), segSize, bufSize);
    NS_ASSERTION(NS_SUCCEEDED(rv), "TP_NewPipe failed");
    rv = TestPipe(in, out);
    NS_ASSERTION(NS_SUCCEEDED(rv), "TestPipe failed");

    printf("Testing short writes...\n");
    rv = TP_NewPipe(getter_AddRefs(in), getter_AddRefs(out), segSize, bufSize);
    NS_ASSERTION(NS_SUCCEEDED(rv), "TP_NewPipe failed");
    rv = TestShortWrites(in, out);
    NS_ASSERTION(NS_SUCCEEDED(rv), "TestPipe failed");
}

////////////////////////////////////////////////////////////////////////////////

#if 0
extern void
TestSegmentedBuffer();
#endif

int
main(int argc, char* argv[])
{
    nsresult rv;

    nsCOMPtr<nsIServiceManager> servMgr;
    rv = NS_InitXPCOM2(getter_AddRefs(servMgr), NULL, NULL);
    if (NS_FAILED(rv)) return rv;

    if (argc > 1 && nsCRT::strcmp(argv[1], "-trace") == 0)
        gTrace = true;

    rv = TestChainedPipes();
    NS_ASSERTION(NS_SUCCEEDED(rv), "TestChainedPipes failed");
    RunTests(16, 1);
    RunTests(4096, 16);

    servMgr = 0;
    rv = NS_ShutdownXPCOM( NULL );
    NS_ASSERTION(NS_SUCCEEDED(rv), "NS_ShutdownXPCOM failed");

    return 0;
}

////////////////////////////////////////////////////////////////////////////////