// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/command_line.h"
#include "base/histogram.h"
#include "base/message_loop.h"
#include "base/path_service.h"
#include "base/platform_thread.h"
#include "base/process_util.h"
#include "base/scoped_nsautorelease_pool.h"
#include "base/string_util.h"
#include "base/system_monitor.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/chrome_counters.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/l10n_util.h"
#include "chrome/common/logging_chrome.h"
#include "chrome/common/main_function_params.h"
#include "chrome/common/resource_bundle.h"
#include "chrome/renderer/renderer_main_platform_delegate.h"
#include "chrome/renderer/render_process.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"

// This function provides some ways to test crash and assertion handling
// behavior of the renderer.
static void HandleRendererErrorTestParameters(const CommandLine& command_line) {
  // This parameter causes an assertion.
  if (command_line.HasSwitch(switches::kRendererAssertTest)) {
    DCHECK(false);
  }

  // This parameter causes a null pointer crash (crash reporter trigger).
  if (command_line.HasSwitch(switches::kRendererCrashTest)) {
    int* bad_pointer = NULL;
    *bad_pointer = 0;
  }

  if (command_line.HasSwitch(switches::kRendererStartupDialog)) {
#if defined(OS_WIN)
    std::wstring title = l10n_util::GetString(IDS_PRODUCT_NAME);
    std::wstring message = L"renderer starting with pid: ";
    message += IntToWString(base::GetCurrentProcId());
    title += L" renderer";  // makes attaching to process easier
    ::MessageBox(NULL, message.c_str(), title.c_str(),
                 MB_OK | MB_SETFOREGROUND);
#elif defined(OS_MACOSX)
    // TODO(playmobil): In the long term, overriding this flag doesn't seem
    // right, either use our own flag or open a dialog we can use.
    // This is just to ease debugging in the interim.
    LOG(WARNING) << "Renderer ("
                 << getpid()
                 << ") paused waiting for debugger to attach @ pid";
    pause();
#endif  // defined(OS_MACOSX)
  }
}

// mainline routine for running as the Rendererer process
int RendererMain(const MainFunctionParams& parameters) {
  const CommandLine& parsed_command_line = parameters.command_line_;
  base::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool_;

  // This function allows pausing execution using the --renderer-startup-dialog
  // flag allowing us to attach a debugger.
  // Do not move this function down since that would mean we can't easily debug
  // whatever occurs before it.
  HandleRendererErrorTestParameters(parsed_command_line);

  RendererMainPlatformDelegate platform(parameters);

  StatsScope<StatsCounterTimer>
      startup_timer(chrome::Counters::renderer_main());

  // The main thread of the renderer services IO.
  MessageLoopForIO main_message_loop;
  std::wstring app_name = chrome::kBrowserAppName;
  PlatformThread::SetName(WideToASCII(app_name + L"_RendererMain").c_str());

  // Initialize the SystemMonitor
  base::SystemMonitor::Start();

  platform.PlatformInitialize();

  bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox);
  platform.InitSandboxTests(no_sandbox);

  // Initialize histogram statistics gathering system.
  // Don't create StatisticsRecorde in the single process mode.
  scoped_ptr<StatisticsRecorder> statistics;
  if (!StatisticsRecorder::WasStarted()) {
    statistics.reset(new StatisticsRecorder());
  }

  {
    RenderProcess render_process;
    bool run_loop = true;
    if (!no_sandbox) {
      run_loop = platform.EnableSandbox();
    }

    platform.RunSandboxTests();

    startup_timer.Stop();  // End of Startup Time Measurement.

    if (run_loop) {
      // Load the accelerator table from the browser executable and tell the
      // message loop to use it when translating messages.
      if (pool) pool->Recycle();
      MessageLoop::current()->Run();
    }
  }
  platform.PlatformUninitialize();
  return 0;
}