// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <iostream>
#include <memory>

#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/debug/stack_trace.h"
#include "base/functional/callback_helpers.h"
#include "base/logging.h"
#include "base/logging/logging_settings.h"
#include "base/message_loop/message_pump_type.h"
#include "base/run_loop.h"
#include "base/task/single_thread_task_executor.h"
#include "base/task/thread_pool/thread_pool_instance.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "mojo/core/embedder/embedder.h"
#include "ui/events/ozone/layout/keyboard_layout_engine.h"
#include "ui/events/ozone/layout/keyboard_layout_engine_manager.h"
#include "ui/ozone/demo/simple_renderer_factory.h"
#include "ui/ozone/demo/window_manager.h"
#include "ui/ozone/public/ozone_platform.h"

const char kHelp[] = "help";

int main(int argc, char** argv) {
  base::CommandLine::Init(argc, argv);
  base::AtExitManager exit_manager;

  base::debug::EnableInProcessStackDumping();

  // Initialize logging so we can enable VLOG messages.
  logging::LoggingSettings settings;

  logging::InitLogging(settings);

  if (base::CommandLine::ForCurrentProcess()->HasSwitch(kHelp)) {
    std::cout << "Usage:\n\n"
                 "  --disable-gpu               Force software rendering\n"
                 "  --disable-surfaceless       Don't use surfaceless EGL\n"
                 "  --window-size=WIDTHxHEIGHT  Specify window size\n"
                 "  --partial-primary-plane     "
                 "Use smaller than fullscreen primary plane\n"
                 "  --enable-overlay            Use an overlay plane\n"
                 "  --disable-primary-plane     Don't use the primary plane\n"
                 "  --use-gpu-fences            "
                 "Use GpuFences for buffer display synchronization\n";

    // TODO(hoegsberg): We should add a little more help text about how these
    // options interact and depend on each other.

    exit(EXIT_SUCCESS);
  }

  mojo::core::Init();

  base::SingleThreadTaskExecutor main_task_executor(base::MessagePumpType::UI);
  base::ThreadPoolInstance::CreateAndStartWithDefaultParams("OzoneDemo");

  ui::OzonePlatform::InitParams params;
  params.single_process = true;
  ui::OzonePlatform::InitializeForUI(params);
  ui::KeyboardLayoutEngineManager::GetKeyboardLayoutEngine()
      ->SetCurrentLayoutByName("us", base::DoNothing());

  ui::OzonePlatform::InitializeForGPU(params);

  auto shutdown_cb =
      base::BindOnce([] { LOG(FATAL) << "Failed to shutdown."; });

  ui::OzonePlatform::GetInstance()->PostCreateMainMessageLoop(
      std::move(shutdown_cb),
      base::SingleThreadTaskRunner::GetCurrentDefault());

  base::RunLoop run_loop;

  ui::WindowManager window_manager(
      std::make_unique<ui::SimpleRendererFactory>(), run_loop.QuitClosure());

  run_loop.Run();

  return 0;
}