#include <std_include.hpp>
#include "loader/component_loader.hpp"

#include "auth.hpp"

#include <game/game.hpp>

#include <utils/nt.hpp>
#include <utils/hook.hpp>
#include <utils/string.hpp>
#include <utils/smbios.hpp>
#include <utils/cryptography.hpp>

namespace auth
{
	namespace
	{
		std::string get_hdd_serial()
		{
			DWORD serial{};
			if (!GetVolumeInformationA("C:\\", nullptr, 0, &serial, nullptr, nullptr, nullptr, 0))
			{
				return {};
			}

			return utils::string::va("%08X", serial);
		}

		std::string get_hw_profile_guid()
		{
			HW_PROFILE_INFO info;
			if (!GetCurrentHwProfileA(&info))
			{
				return {};
			}

			return std::string{info.szHwProfileGuid, sizeof(info.szHwProfileGuid)};
		}

		std::string get_protected_data()
		{
			std::string input = "momo5502-boiii-auth";

			DATA_BLOB data_in{}, data_out{};
			data_in.pbData = reinterpret_cast<uint8_t*>(input.data());
			data_in.cbData = static_cast<DWORD>(input.size());
			if (CryptProtectData(&data_in, nullptr, nullptr, nullptr, nullptr, CRYPTPROTECT_LOCAL_MACHINE,
			                     &data_out) != TRUE)
			{
				return {};
			}

			const auto size = std::min(data_out.cbData, 52ul);
			std::string result{reinterpret_cast<char*>(data_out.pbData), size};
			LocalFree(data_out.pbData);

			return result;
		}

		std::string get_key_entropy()
		{
			std::string entropy{};
			entropy.append(utils::smbios::get_uuid());
			entropy.append(get_hw_profile_guid());
			entropy.append(get_protected_data());
			entropy.append(get_hdd_serial());

			if (entropy.empty())
			{
				entropy.resize(32);
				utils::cryptography::random::get_data(entropy.data(), entropy.size());
			}

			return entropy;
		}

		utils::cryptography::ecc::key& get_key()
		{
			static auto key = utils::cryptography::ecc::generate_key(512, get_key_entropy());
			return key;
		}
	}

	bool is_second_instance()
	{
		static const auto is_first = []
		{
			static utils::nt::handle<> mutex = CreateMutexA(nullptr, FALSE, "boiii_mutex");
			return mutex && GetLastError() != ERROR_ALREADY_EXISTS;
		}();

		return !is_first;
	}

	uint64_t get_guid()
	{
		static const auto guid = []() -> uint64_t
		{
			if (is_second_instance())
			{
				return 0x110000100000000 | (::utils::cryptography::random::get_integer() & ~0x80000000);
			}

			return get_key().get_hash();
		}();

		return guid;
	}

	struct component final : client_component
	{
		void post_unpack() override
		{
			// Patch steam id bit check
			utils::hook::jump(0x141E19D7D_g, 0x141E19DCB_g);
			utils::hook::jump(0x141EB2D06_g, 0x141EB2D46_g);
			utils::hook::jump(0x141EB2E3D_g, 0x141EB2E82_g);
			utils::hook::jump(0x141EB3CC5_g, 0x141EB3D06_g);
		}
	};
}

REGISTER_COMPONENT(auth::component)