// The core's own boot step. It is both a working example of DESCENT_BOOT_STEP and a guard: every later system
// can rely on the core seams existing in the world once boot has started, and a world without them (a game mode
// or subsystem that failed to come up) fails the boot at once, by name, instead of crashing a system later.

#include "Core/DescentBoot.h"
#include "Core/DescentEnvQuery.h"
#include "Core/DescentGameMode.h"
#include "Core/DescentSimSubsystem.h"
#include "Core/DescentStreamFocus.h"
#include "TheDescent.h"
#include "UI/DescentHudSubsystem.h"

#include "Engine/World.h"

DESCENT_BOOT_STEP(CoreSeams, Descent::Boot::Order::BeforeAll)
{
	if (!UDescentSimSubsystem::Get(Ctx.World))
	{
		Ctx.Fail(TEXT("UDescentSimSubsystem is missing from the world"));
		return;
	}
	if (!UDescentEnvQuerySubsystem::Get(Ctx.World))
	{
		Ctx.Fail(TEXT("UDescentEnvQuerySubsystem is missing from the world"));
		return;
	}
	if (!UDescentStreamFocusSubsystem::Get(Ctx.World))
	{
		Ctx.Fail(TEXT("UDescentStreamFocusSubsystem is missing from the world"));
		return;
	}
	if (!UDescentHudSubsystem::Get(Ctx.World))
	{
		Ctx.Fail(TEXT("UDescentHudSubsystem is missing from the world"));
		return;
	}
	UE_LOG(LogDescent, Display, TEXT("Boot: core seams present (sim, env query, stream focus, HUD model); %s"),
		Ctx.bScenarioRunning ? TEXT("a scenario is running, boot steps run anyway") : TEXT("no scenario"));
}