#include <STDInclude.hpp>

namespace Components
{
	SteamID Dedicated::PlayerGuids[18][2];

	Dvar::Var Dedicated::SVLanOnly;
	Dvar::Var Dedicated::COMLogFilter;

	bool Dedicated::IsEnabled()
	{
		static std::optional<bool> flag;

		if (!flag.has_value())
		{
			flag.emplace(Flags::HasFlag("dedicated"));
		}

		return flag.value();
	}

	void Dedicated::InitDedicatedServer()
	{
		static const char* fastfiles[7] =
		{
			"code_post_gfx_mp",
			"localized_code_post_gfx_mp",
			"ui_mp",
			"localized_ui_mp",
			"common_mp",
			"localized_common_mp",
			"patch_mp"
		};

		std::memcpy(reinterpret_cast<void*>(0x66E1CB0), &fastfiles, sizeof(fastfiles));
		Game::R_LoadGraphicsAssets();

		if (COMLogFilter.get<bool>())
		{
			Utils::Hook::Nop(0x647466, 5); // 'dvar set' lines
			Utils::Hook::Nop(0x5DF4F2, 5); // 'sending splash open' lines
		}

		Utils::Hook::Call<void()>(0x4F84C0)();
	}

	void Dedicated::PostInitialization()
	{
		Command::Execute("exec autoexec.cfg");
		Command::Execute("onlinegame 1");
		Command::Execute("exec default_xboxlive.cfg");
		Command::Execute("xblive_rankedmatch 1");
		Command::Execute("xblive_privatematch 1");
		Command::Execute("xblive_privateserver 0");
		Command::Execute("xstartprivatematch");
		//Command::Execute("xstartlobby");
		Command::Execute("sv_network_fps 1000");
		Command::Execute("cl_maxpackets 125");
		Command::Execute("snaps 30");
		Command::Execute("com_maxfps 125");

		// Process command line?
		Utils::Hook::Call<void()>(0x60C3D0)();
	}

	__declspec(naked) void Dedicated::PostInitializationStub()
	{
		__asm
		{
			pushad
			call Dedicated::PostInitialization
			popad

			// Start Com_EvenLoop
			mov eax, 43D140h
			jmp eax
		}
	}

	void Dedicated::TransmitGuids()
	{
		std::string list = Utils::String::VA("%c", 20);

		for (int i = 0; i < 18; ++i)
		{
			if (Game::svs_clients[i].state >= 3)
			{
				list.append(Utils::String::VA(" %llX", Game::svs_clients[i].steamID));

				Utils::InfoString info(Game::svs_clients[i].userinfo);
				list.append(Utils::String::VA(" %llX", strtoull(info.get("realsteamId").data(), nullptr, 16)));
			}
			else
			{
				list.append(" 0 0");
			}
		}

		Game::SV_GameSendServerCommand(-1, Game::SV_CMD_CAN_IGNORE, list.data());
	}

	void Dedicated::TimeWrapStub(Game::errorParm_t code, const char* message)
	{
		Scheduler::Once([]
		{
			const auto partyEnable = Dvar::Var("party_enable").get<bool>();
			auto mapname = Dvar::Var("mapname").get<std::string>();

			if (!partyEnable) // Time wrapping should not occur in party servers, but yeah...
			{
				if (mapname.empty()) mapname = "mp_rust";
				Command::Execute(Utils::String::VA("map %s", mapname.data()), false);
			}
		}, Scheduler::Pipeline::SERVER);

		Game::Com_Error(code, message);
	}

	void Dedicated::Heartbeat()
	{	
		// Do not send a heartbeat if sv_lanOnly is set to true
		if (Dedicated::SVLanOnly.get<bool>())
		{
			return;
		}

		auto masterPort = Dvar::Var("masterPort").get<int>();
		const auto* masterServerName = Dvar::Var("masterServerName").get<const char*>();

		Network::Address master(Utils::String::VA("%s:%u", masterServerName, masterPort));

		Logger::Print(Game::CON_CHANNEL_SERVER, "Sending heartbeat to master: {}:{}\n", masterServerName, masterPort);
		Network::SendCommand(master, "heartbeat", "IW4");
	}

	Game::dvar_t* Dedicated::Dvar_RegisterSVNetworkFps(const char* dvarName, int, int min, int, int, const char* description)
	{
		return Game::Dvar_RegisterInt(dvarName, 1000, min, 1000, Game::DVAR_NONE, description);
	}

	void Dedicated::AddDedicatedCommands()
	{
		// Say command
		Command::AddSV("say", [](Command::Params* params)
		{
			if (params->size() < 2) return;

			auto message = params->join(1);
			auto name = Dvar::Var("sv_sayName").get<std::string>();

			if (!name.empty())
			{
				Game::SV_GameSendServerCommand(-1, Game::SV_CMD_CAN_IGNORE, Utils::String::VA("%c \"%s: %s\"", 104, name.data(), message.data()));
				Logger::Print(Game::CON_CHANNEL_SERVER, "{}: {}\n", name, message);
			}
			else
			{
				Game::SV_GameSendServerCommand(-1, Game::SV_CMD_CAN_IGNORE, Utils::String::VA("%c \"Console: %s\"", 104, message.data()));
				Logger::Print(Game::CON_CHANNEL_SERVER, "Console: {}\n", message);
			}
		});

		// Tell command
		Command::AddSV("tell", [](Command::Params* params)
		{
			if (params->size() < 3) return;

			const auto client = atoi(params->get(1));
			auto message = params->join(2);
			auto name = Dvar::Var("sv_sayName").get<std::string>();

			if (!name.empty())
			{
				Game::SV_GameSendServerCommand(client, Game::SV_CMD_CAN_IGNORE, Utils::String::VA("%c \"%s: %s\"", 104, name.data(), message.data()));
				Logger::Print(Game::CON_CHANNEL_SERVER, "{} -> {}: {}\n", name, client, message);
			}
			else
			{
				Game::SV_GameSendServerCommand(client, Game::SV_CMD_CAN_IGNORE, Utils::String::VA("%c \"Console: %s\"", 104, message.data()));
				Logger::Print(Game::CON_CHANNEL_SERVER, "Console -> {}: {}\n", client, message);
			}
		});

		// Sayraw command
		Command::AddSV("sayraw", [](Command::Params* params)
		{
			if (params->size() < 2) return;

			auto message = params->join(1);
			Game::SV_GameSendServerCommand(-1, Game::SV_CMD_CAN_IGNORE, Utils::String::VA("%c \"%s\"", 104, message.data()));
			Logger::Print(Game::CON_CHANNEL_SERVER, "Raw: {}\n", message);
		});

		// Tellraw command
		Command::AddSV("tellraw", [](Command::Params* params)
		{
			if (params->size() < 3) return;

			const auto client = atoi(params->get(1));
			std::string message = params->join(2);
			Game::SV_GameSendServerCommand(client, Game::SV_CMD_CAN_IGNORE, Utils::String::VA("%c \"%s\"", 104, message.data()));
			Logger::Print(Game::CON_CHANNEL_SERVER, "Raw -> {}: {}\n", client, message);
		});
	}

	Dedicated::Dedicated()
	{
		Dedicated::COMLogFilter = Dvar::Register<bool>("com_logFilter", true,
			Game::DVAR_LATCH, "Removes ~95% of unneeded lines from the log");

		if (Dedicated::IsEnabled() || ZoneBuilder::IsEnabled())
		{
			// Make sure all callbacks are handled
			Scheduler::Loop(Steam::SteamAPI_RunCallbacks, Scheduler::Pipeline::SERVER);

			Dedicated::SVLanOnly = Dvar::Register<bool>("sv_lanOnly", false,
				Game::DVAR_NONE, "Don't act as node");

			Utils::Hook(0x60BE98, Dedicated::InitDedicatedServer, HOOK_CALL).install()->quick();

			Utils::Hook::Set<BYTE>(0x683370, 0xC3); // steam sometimes doesn't like the server

			Utils::Hook::Set<BYTE>(0x5B4FF0, 0xC3); // self-registration on party
			Utils::Hook::Set<BYTE>(0x426130, 0xC3); // other party stuff?

			Utils::Hook::Set<BYTE>(0x4D7030, 0xC3); // upnp stuff

			Utils::Hook::Set<BYTE>(0x4B0FC3, 0x04); // make CL_Frame do client packets, even for game state 9
			Utils::Hook::Set<BYTE>(0x4F5090, 0xC3); // init sound system (1)
			Utils::Hook::Set<BYTE>(0x507B80, 0xC3); // start render thread
			Utils::Hook::Set<BYTE>(0x4F84C0, 0xC3); // R_Init caller
			Utils::Hook::Set<BYTE>(0x46A630, 0xC3); // init sound system (2)
			Utils::Hook::Set<BYTE>(0x41FDE0, 0xC3); // Com_Frame audio processor?
			Utils::Hook::Set<BYTE>(0x41B9F0, 0xC3); // called from Com_Frame, seems to do renderer stuff
			Utils::Hook::Set<BYTE>(0x41D010, 0xC3); // CL_CheckForResend, which tries to connect to the local server constantly
			Utils::Hook::Set<BYTE>(0x62B6C0, 0xC3); // UI expression 'DebugPrint', mainly to prevent some console spam

			Utils::Hook::Set<BYTE>(0x468960, 0xC3); // some mixer-related function called on shutdown
			Utils::Hook::Set<BYTE>(0x60AD90, 0);    // masterServerName flags

			Utils::Hook::Nop(0x4DCEC9, 2);          // some check preventing proper game functioning
			Utils::Hook::Nop(0x507C79, 6);          // another similar bsp check
			Utils::Hook::Nop(0x414E4D, 6);          // cl->messageAcknowledge > cl->gamestateMessageNum check in SV_ExecuteClientMessage
			Utils::Hook::Nop(0x4DCEE9, 5);          // some deinit renderer function
			Utils::Hook::Nop(0x59A896, 5);          // warning message on a removed subsystem
			Utils::Hook::Nop(0x4B4EEF, 5);          // same as above
			Utils::Hook::Nop(0x64CF77, 5);          // function detecting video card, causes Direct3DCreate9 to be called
			Utils::Hook::Nop(0x60BC52, 0x15);       // recommended settings check

			Utils::Hook::Nop(0x45148B, 5);          // Disable splash screen

			// do not trigger host migration, even if the server is a 'bad host'
			Utils::Hook::Set<BYTE>(0x626AA8, 0xEB);

			// isHost script call return 0
			Utils::Hook::Set<DWORD>(0x5DEC04, 0);

			// Manually register sv_network_fps
			Utils::Hook(0x4D3C7B, Dedicated::Dvar_RegisterSVNetworkFps, HOOK_CALL).install()->quick();

			// r_loadForRenderer default to 0
			Utils::Hook::Set<BYTE>(0x519DDF, 0);

			// disable cheat protection on onlinegame
			Utils::Hook::Set<BYTE>(0x404CF7, 0x80);

			// some d3d9 call on error
			Utils::Hook::Set<BYTE>(0x508470, 0xC3);

			// stop saving a config_mp.cfg
			Utils::Hook::Set<BYTE>(0x60B240, 0xC3);

			// don't load the config
			Utils::Hook::Set<BYTE>(0x4B4D19, 0xEB);

			// Intercept time wrapping
			Utils::Hook(0x62737D, Dedicated::TimeWrapStub, HOOK_CALL).install()->quick();
			//Utils::Hook::Set<DWORD>(0x62735C, 50'000); // Time wrap after 50 seconds (for testing - i don't want to wait 3 weeks)

			if (!ZoneBuilder::IsEnabled())
			{
				Scheduler::Once([]
				{
					Dvar::Register<const char*>("sv_sayName", "^7Console", Game::DVAR_NONE, "The name to pose as for 'say' commands");
					Dvar::Register<const char*>("sv_motd", "", Game::DVAR_NONE, "A custom message of the day for servers");
				}, Scheduler::Pipeline::MAIN);

				Events::OnSVInit(Dedicated::AddDedicatedCommands);

				// Post initialization point
				Utils::Hook(0x60BFBF, Dedicated::PostInitializationStub, HOOK_JUMP).install()->quick();

				// Transmit custom data
				Scheduler::Loop([]
				{
					CardTitles::SendCustomTitlesToClients();
				}, Scheduler::Pipeline::SERVER, 10s);

				// Heartbeats
				Scheduler::Once(Dedicated::Heartbeat, Scheduler::Pipeline::SERVER);
				Scheduler::Loop(Dedicated::Heartbeat, Scheduler::Pipeline::SERVER, 2min);
			}
		}
		else
		{
			for (int i = 0; i < ARRAYSIZE(Dedicated::PlayerGuids); ++i)
			{
				Dedicated::PlayerGuids[i][0].bits = 0;
				Dedicated::PlayerGuids[i][1].bits = 0;
			}

			// Intercept server commands
			ServerCommands::OnCommand(20, [](Command::Params* params)
			{
				for (int client = 0; client < 18; client++)
				{
					Dedicated::PlayerGuids[client][0].bits = strtoull(params->get(2 * client + 1), nullptr, 16);
					Dedicated::PlayerGuids[client][1].bits = strtoull(params->get(2 * client + 2), nullptr, 16);

					if (Steam::Proxy::SteamFriends && Dedicated::PlayerGuids[client][1].bits != 0)
					{
						Steam::Proxy::SteamFriends->SetPlayedWith(Dedicated::PlayerGuids[client][1]);
					}
				}

				return true;
			});
		}

		Scheduler::Loop([]
		{
			if (Dvar::Var("sv_running").get<bool>())
			{
				Dedicated::TransmitGuids();
			}
		}, Scheduler::Pipeline::SERVER, 15s);
	}
}