BT412/game/reconstructed/btl4console.cpp

//===========================================================================//
// btl4console.cpp -- BT412 in-process LocalConsole marshal (solo path).
//
// See btl4console.hpp.  Models RP412's RPL4CONSOLE ConsoleTick, reduced to the
// single-player case: no remote pods, no wire -- just own the mission clock and
// dispatch StopMissionMessage at expiry.  The tick runs on the game thread
// (gPerFrameHook), so the engine call (Dispatch) is safe.
//===========================================================================//
#include <bt.hpp>				// Application, application, DEBUG_STREAM
#pragma hdrstop

#include "appmsg.hpp"			// full Application::StopMissionMessage definition
#include "appmgr.hpp"			// gPerFrameHook
#include "btl4console.hpp"

// The pilot roster + score bridges (btl4gau3.cpp / mechmppr.cpp / btplayer.cpp):
// the pilotList reads them for the Comm MFD, and the marshal snapshots them at
// the stop so the results screen has the final scores.
extern void *BTResolveRosterPilot(int slot);
extern int   BTPilotKills(void *pilot);
extern int   BTPilotDeaths(void *pilot);

namespace
{
	enum Phase { PhaseIdle, PhaseWaiting, PhaseRunning, PhaseStopped };

	Phase        gPhase         = PhaseIdle;
	int          gMissionSeconds = 0;
	unsigned long gStartTick     = 0;
	Application  *gWatched       = 0;

	// Final scores snapshotted at the stop (roster order; slot 0 = local).
	enum { maxResults = 8 };
	struct Result { int kills, deaths; };
	Result gResults[maxResults];
	int    gResultCount = 0;

	void SnapshotResults()
	{
		gResultCount = 0;
		for (int slot = 0; slot < maxResults; ++slot)
		{
			void *pilot = BTResolveRosterPilot(slot);
			if (pilot == 0)
				break;						// past the last occupied roster slot
			gResults[gResultCount].kills  = BTPilotKills(pilot);
			gResults[gResultCount].deaths = BTPilotDeaths(pilot);
			++gResultCount;
		}
		DEBUG_STREAM << "[marshal] snapshot " << gResultCount << " pilot score(s)\n" << std::flush;
	}

	//
	// The game-thread tick (called every frame while an application is live).
	//
	void ConsoleTick()
	{
		if (application == 0)
			return;

		int state = application->GetApplicationState();

		switch (gPhase)
		{
		case PhaseWaiting:
			// The mission has staged and started running -> start the clock.
			if (state == Application::RunningMission)
			{
				gPhase     = PhaseRunning;
				gWatched   = application;
				gStartTick = GetTickCount();
				DEBUG_STREAM << "[marshal] mission running -- length "
					<< gMissionSeconds << "s\n" << std::flush;
			}
			break;

		case PhaseRunning:
			if (application != gWatched)
				return;						// only marshal our own mission

			if (state != Application::RunningMission)
			{
				// ended some other way (pilot abort, teardown)
				gPhase = PhaseStopped;
				DEBUG_STREAM << "[marshal] mission ended (state change)\n" << std::flush;
			}
			else if (gMissionSeconds > 0 &&
				(GetTickCount() - gStartTick) >= (unsigned long)(gMissionSeconds * 1000))
			{
				// The console clock expired: snapshot the final scores (the
				// game state is still live here), then stop the race exactly
				// as the arcade console did (StopMissionMessage on our pod).
				DEBUG_STREAM << "[marshal] time expired -- stopping mission\n" << std::flush;
				SnapshotResults();
				Application::StopMissionMessage message(0);
				application->Dispatch(&message);
				gPhase = PhaseStopped;
			}
			break;

		default:
			break;
		}
	}
}

void BTLocalConsole_Install(int mission_seconds)
{
	gMissionSeconds = mission_seconds;
	gPhase          = PhaseWaiting;
	gStartTick      = 0;
	gWatched        = 0;
	// Marshaled: the in-process console owns the clock, so a console-loss
	// (there is none locally) would end the race -- harmless for solo.
	gConsoleLossEndsMission = True;
	gPerFrameHook = &ConsoleTick;
	DEBUG_STREAM << "[marshal] installed (length " << mission_seconds << "s)\n" << std::flush;
}

int BTLocalConsole_MissionCompleted()
{
	return (gPhase == PhaseStopped) ? 1 : 0;
}

int BTLocalConsole_ResultCount()
{
	return gResultCount;
}

int BTLocalConsole_GetResult(int index, int *kills, int *deaths)
{
	if (index < 0 || index >= gResultCount)
		return 0;
	if (kills)  *kills  = gResults[index].kills;
	if (deaths) *deaths = gResults[index].deaths;
	return 1;
}

void BTLocalConsole_Uninstall()
{
	gPerFrameHook = 0;
	gPhase        = PhaseIdle;
}