//********************************** Banshee Engine (www.banshee3d.com) **************************************************//
//**************** Copyright (c) 2016 Marko Pintera (marko.pintera@gmail.com). All rights reserved. **********************//
#include "Utility/BsPlatformUtility.h"
#include <uuid/uuid.h>
#include <sys/sysctl.h>

namespace bs
{
	GPUInfo PlatformUtility::sGPUInfo;

	void PlatformUtility::terminate(bool force)
	{
		// TODOPORT - Support clean exit by sending the main window a quit message
		exit(0);
	}

	SystemInfo PlatformUtility::getSystemInfo()
	{
		char buffer[256];

		SystemInfo sysInfo;

		size_t bufferlen = sizeof(buffer);
		if(sysctlbyname("machdep.cpu.vendor", buffer, &bufferlen, nullptr, 0) == 0)
			sysInfo.cpuManufacturer = buffer;

		bufferlen = sizeof(buffer);
		if(sysctlbyname("machdep.cpu.brand_string", buffer, &bufferlen, nullptr, 0) == 0)
			sysInfo.cpuModel = buffer;

		bufferlen = sizeof(buffer);
		if(sysctlbyname("kern.osrelease", buffer, &bufferlen, nullptr, 0) == 0)
			sysInfo.osName = "macOS " + String(buffer);

		bufferlen = sizeof(buffer);
		if(sysctlbyname("kern.version", buffer, &bufferlen, nullptr, 0) == 0)
			sysInfo.osIs64Bit = strstr(buffer, "X86_64") != nullptr;
		else
			sysInfo.osIs64Bit = false;

		bufferlen = sizeof(buffer);
		if(sysctlbyname("hw.cpufrequency", buffer, &bufferlen, nullptr, 0) == 0)
		{
			UINT32 speedHz = *(UINT32*)buffer;
			sysInfo.cpuClockSpeedMhz = speedHz / (1000 * 1000);
		}
		else
			sysInfo.cpuClockSpeedMhz = 0;

		bufferlen = sizeof(buffer);
		if(sysctlbyname("hw.physicalcpu", buffer, &bufferlen, nullptr, 0) == 0)
			sysInfo.cpuNumCores = *(UINT32*)buffer;
		else
			sysInfo.cpuNumCores = 0;

		bufferlen = sizeof(buffer);
		if(sysctlbyname("hw.memsize", buffer, &bufferlen, nullptr, 0) == 0)
		{
			UINT64 memAmountBytes = *(UINT64*)buffer;
			sysInfo.memoryAmountMb = (UINT32)(memAmountBytes / (1024 * 1024));
		}
		else
			sysInfo.memoryAmountMb = 0;

		sysInfo.gpuInfo = sGPUInfo;
		return sysInfo;
	}

	UUID PlatformUtility::generateUUID()
	{
		uuid_t nativeUUID;
		uuid_generate(nativeUUID);

		return UUID(
			*(UINT32*)&nativeUUID[0],
			*(UINT32*)&nativeUUID[4],
			*(UINT32*)&nativeUUID[8],
			*(UINT32*)&nativeUUID[12]);
	}
}