// -*- c-basic-offset: 2 -*-
/*
 *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
 *  Copyright (C) 2004-2007 Apple Inc.
 *  Copyright (C) 2006 Bjoern Graf (bjoern.graf@gmail.com)
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 *
 */

#include "config.h"

#include "JSGlobalObject.h"
#include "JSLock.h"
#include "Parser.h"
#include "collector.h"
#include "interpreter.h"
#include "nodes.h"
#include "object.h"
#include "protect.h"
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <wtf/Assertions.h>
#include <wtf/HashTraits.h>

#if HAVE(SYS_TIME_H)
#include <sys/time.h>
#endif

#if PLATFORM(WIN_OS)
#include <crtdbg.h>
#include <windows.h>
#endif

#if PLATFORM(QT)
#include <QDateTime>
#endif

using namespace KJS;
using namespace WTF;

static bool fillBufferWithContentsOfFile(const UString& fileName, Vector<char>& buffer);

class StopWatch
{
public:
    void start();
    void stop();
    long getElapsedMS(); // call stop() first
    
private:
#if PLATFORM(QT)
    uint m_startTime;
    uint m_stopTime;
#elif PLATFORM(WIN_OS)
    DWORD m_startTime;
    DWORD m_stopTime;
#else
    // Windows does not have timeval, disabling this class for now (bug 7399)
    timeval m_startTime;
    timeval m_stopTime;
#endif
};

void StopWatch::start()
{
#if PLATFORM(QT)
    QDateTime t = QDateTime::currentDateTime();
    m_startTime = t.toTime_t() * 1000 + t.time().msec();
#elif PLATFORM(WIN_OS)
    m_startTime = timeGetTime();
#else
    gettimeofday(&m_startTime, 0);
#endif
}

void StopWatch::stop()
{
#if PLATFORM(QT)
    QDateTime t = QDateTime::currentDateTime();
    m_stopTime = t.toTime_t() * 1000 + t.time().msec();
#elif PLATFORM(WIN_OS)
    m_stopTime = timeGetTime();
#else
    gettimeofday(&m_stopTime, 0);
#endif
}

long StopWatch::getElapsedMS()
{
#if PLATFORM(WIN_OS) || PLATFORM(QT)
    return m_stopTime - m_startTime;
#else
    timeval elapsedTime;
    timersub(&m_stopTime, &m_startTime, &elapsedTime);
    
    return elapsedTime.tv_sec * 1000 + lroundf(elapsedTime.tv_usec / 1000.0f);
#endif
}

class GlobalImp : public JSGlobalObject {
public:
  virtual UString className() const { return "global"; }
};
COMPILE_ASSERT(!IsInteger<GlobalImp>::value, WTF_IsInteger_GlobalImp_false);

class TestFunctionImp : public JSObject {
public:
  enum TestFunctionType { Print, Debug, Quit, GC, Version, Run, Load };

  TestFunctionImp(TestFunctionType i, int length);
  virtual bool implementsCall() const { return true; }
  virtual JSValue* callAsFunction(ExecState* exec, JSObject* thisObj, const List &args);

private:
  TestFunctionType m_type;
};

TestFunctionImp::TestFunctionImp(TestFunctionType i, int length)
  : JSObject()
  , m_type(i)
{
  putDirect(Identifier("length"), length, DontDelete | ReadOnly | DontEnum);
}

JSValue* TestFunctionImp::callAsFunction(ExecState* exec, JSObject*, const List &args)
{
  switch (m_type) {
    case Print:
      printf("%s\n", args[0]->toString(exec).UTF8String().c_str());
      return jsUndefined();
    case Debug:
      fprintf(stderr, "--> %s\n", args[0]->toString(exec).UTF8String().c_str());
      return jsUndefined();
    case GC:
    {
      JSLock lock;
      Collector::collect();
      return jsUndefined();
    }
    case Version:
      // We need this function for compatibility with the Mozilla JS tests but for now
      // we don't actually do any version-specific handling
      return jsUndefined();
    case Run:
    {
      StopWatch stopWatch;
      UString fileName = args[0]->toString(exec);
      Vector<char> script;
      if (!fillBufferWithContentsOfFile(fileName, script))
        return throwError(exec, GeneralError, "Could not open file.");

      stopWatch.start();
      Interpreter::evaluate(exec->dynamicGlobalObject()->globalExec(), fileName, 0, script.data());
      stopWatch.stop();
      
      return jsNumber(stopWatch.getElapsedMS());
    }
    case Load:
    {
      UString fileName = args[0]->toString(exec);
      Vector<char> script;
      if (!fillBufferWithContentsOfFile(fileName, script))
        return throwError(exec, GeneralError, "Could not open file.");

      Interpreter::evaluate(exec->dynamicGlobalObject()->globalExec(), fileName, 0, script.data());

      return jsUndefined();
    }
    case Quit:
      exit(0);
    default:
      abort();
  }
  return 0;
}

// Use SEH for Release builds only to get rid of the crash report dialog
// (luckily the same tests fail in Release and Debug builds so far). Need to
// be in a separate main function because the kjsmain function requires object
// unwinding.

#if PLATFORM(WIN_OS) && !defined(_DEBUG)
#define TRY       __try {
#define EXCEPT(x) } __except (EXCEPTION_EXECUTE_HANDLER) { x; }
#else
#define TRY
#define EXCEPT(x)
#endif

int kjsmain(int argc, char** argv);

int main(int argc, char** argv)
{
#if defined(_DEBUG) && PLATFORM(WIN_OS)
    _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
    _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
    _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
    _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE);
    _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
    _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE);
#endif

    int res = 0;
    TRY
        res = kjsmain(argc, argv);
    EXCEPT(res = 3)
    return res;
}

static GlobalImp* createGlobalObject()
{
  GlobalImp* global = new GlobalImp;

  // add debug() function
  global->put(global->globalExec(), "debug", new TestFunctionImp(TestFunctionImp::Debug, 1));
  // add "print" for compatibility with the mozilla js shell
  global->put(global->globalExec(), "print", new TestFunctionImp(TestFunctionImp::Print, 1));
  // add "quit" for compatibility with the mozilla js shell
  global->put(global->globalExec(), "quit", new TestFunctionImp(TestFunctionImp::Quit, 0));
  // add "gc" for compatibility with the mozilla js shell
  global->put(global->globalExec(), "gc", new TestFunctionImp(TestFunctionImp::GC, 0));
  // add "version" for compatibility with the mozilla js shell 
  global->put(global->globalExec(), "version", new TestFunctionImp(TestFunctionImp::Version, 1));
  global->put(global->globalExec(), "run", new TestFunctionImp(TestFunctionImp::Run, 1));
  global->put(global->globalExec(), "load", new TestFunctionImp(TestFunctionImp::Load, 1));

  Interpreter::setShouldPrintExceptions(true);
  return global;
}

static bool prettyPrintScript(const UString& fileName, const Vector<char>& script)
{
  int errLine = 0;
  UString errMsg;
  UString scriptUString(script.data());
  RefPtr<ProgramNode> programNode = parser().parse<ProgramNode>(fileName, 0, scriptUString.data(), scriptUString.size(), 0, &errLine, &errMsg);
  if (!programNode) {
    fprintf(stderr, "%s:%d: %s.\n", fileName.UTF8String().c_str(), errLine, errMsg.UTF8String().c_str());
    return false;
  }
  
  printf("%s\n", programNode->toString().UTF8String().c_str());
  return true;
}

static bool runWithScripts(const Vector<UString>& fileNames, bool prettyPrint)
{
  GlobalImp* globalObject = createGlobalObject();
  Vector<char> script;
  
  bool success = true;
  
  for (size_t i = 0; i < fileNames.size(); i++) {
    UString fileName = fileNames[i];
    
    if (!fillBufferWithContentsOfFile(fileName, script))
      return false; // fail early so we can catch missing files
    
    if (prettyPrint)
      prettyPrintScript(fileName, script);
    else {
      Completion completion = Interpreter::evaluate(globalObject->globalExec(), fileName, 0, script.data());
      success = success && completion.complType() != Throw;
    }
  }
  return success;
}

static void parseArguments(int argc, char** argv, Vector<UString>& fileNames, bool& prettyPrint)
{
  if (argc < 2) {
    fprintf(stderr, "Usage: testkjs file1 [file2...]\n");
    exit(-1);
  }
  
  for (int i = 1; i < argc; i++) {
    const char* fileName = argv[i];
    if (strcmp(fileName, "-f") == 0) // mozilla test driver script uses "-f" prefix for files
      continue;
    if (strcmp(fileName, "-p") == 0) {
      prettyPrint = true;
      continue;
    }
    fileNames.append(fileName);
  }
}

int kjsmain(int argc, char** argv)
{
  JSLock lock;
  
  bool prettyPrint = false;
  Vector<UString> fileNames;
  parseArguments(argc, argv, fileNames, prettyPrint);
  
  bool success = runWithScripts(fileNames, prettyPrint);

#ifndef NDEBUG
  Collector::collect();
#endif

  return success ? 0 : 3;
}

static bool fillBufferWithContentsOfFile(const UString& fileName, Vector<char>& buffer)
{
  FILE* f = fopen(fileName.UTF8String().c_str(), "r");
  if (!f) {
    fprintf(stderr, "Could not open file: %s\n", fileName.UTF8String().c_str());
    return false;
  }
  
  size_t buffer_size = 0;
  size_t buffer_capacity = 1024;
  
  buffer.resize(buffer_capacity);
  
  while (!feof(f) && !ferror(f)) {
    buffer_size += fread(buffer.data() + buffer_size, 1, buffer_capacity - buffer_size, f);
    if (buffer_size == buffer_capacity) { // guarantees space for trailing '\0'
      buffer_capacity *= 2;
      buffer.resize(buffer_capacity);
    }
  }
  fclose(f);
  buffer[buffer_size] = '\0';
  
  return true;
}