untyped

global function NukeTitanThink

global function AutoTitan_SelfDestruct

const NUKE_TITAN_PLAYER_DETECT_RANGE 	= 500
const NUKE_TITAN_RANGE_CHECK_SLEEP_SECS = 1.0

void function AutoTitan_SelfDestruct( entity titan )
{
	if ( titan.ContextAction_IsBusy() )
		titan.ContextAction_ClearBusy()

	thread TitanEjectPlayer( titan )
}

void function NukeTitanThink( entity titan, entity generator )
{
	//Function assumes that given Titan is spawned as npc_titan_ogre_meteor_nuke. Changing the Titan's AISettings post-spawn
	//disrupts the Titan's titanfall animations and can result in the Titan landing outside the level.
	NPC_SetNuclearPayload( titan )
	AddEntityCallback_OnPostDamaged( titan, AutoTitan_NuclearPayload_PostDamageCallback )

	WaitTillHotDropComplete( titan )

	thread NukeTitanSeekOutGenerator( titan, generator )
}


void function NukeTitanSeekOutGenerator( entity titan, entity generator )
{
	titan.EndSignal( "OnDeath" )
	titan.EndSignal( "OnDestroy" )
	titan.EndSignal( "Doomed" )

	WaitSignal( titan, "FD_ReachedHarvester", "OnFailedToPath" )

	float goalRadius = 100
	float checkRadiusSqr = 400 * 400

	//array<vector> pos = NavMesh_RandomPositions( generator.GetOrigin(), HULL_TITAN, 5, 250, 350 )
	array<vector> pos = NavMesh_GetNeighborPositions( generator.GetOrigin(), HULL_TITAN, 5 )
	pos = ArrayClosestVector( pos, titan.GetOrigin() )

	array<vector> validPos
	foreach ( point in pos )
	{
		if ( DistanceSqr( generator.GetOrigin(), point ) <= checkRadiusSqr && NavMesh_IsPosReachableForAI( titan, point ) )
		{
			validPos.append( point )
			//DebugDrawSphere( point, 32, 255, 0, 0, true, 60 )
		}
	}

	int posLen = validPos.len()
	while( posLen >= 1 )
	{
		titan.SetEnemy( generator )
		thread AssaultOrigin( titan, validPos[0], goalRadius )
		titan.AssaultSetFightRadius( goalRadius )

		wait 0.5

		if ( DistanceSqr( titan.GetOrigin(), generator.GetOrigin() ) > checkRadiusSqr )
			continue

		break
	}

	thread AutoTitan_SelfDestruct( titan )
}

// intercept damage to nuke titans in damage callback so we can nuke them before death 100% of the time
void function AutoTitan_NuclearPayload_PostDamageCallback( entity titan, var damageInfo )
{
	if ( !IsAlive( titan ) )
		return

	entity titanOwner = titan.GetBossPlayer()
	if ( IsValid( titanOwner ) )
	{
		Assert( titanOwner.IsPlayer() )
		Assert( GetPlayerTitanInMap( titanOwner ) == titan )
		return
	}

	int nuclearPayload = NPC_GetNuclearPayload( titan )
	if ( nuclearPayload == 0 )
		return

	if ( !GetDoomedState( titan ) )
		return

	if ( titan.GetTitanSoul().IsEjecting() )
		return

	// Nuke eject as soon as the titan enters doom state.
	if ( !( "doomedStateNukeTriggerHealth" in titan.s ) )
	{
		titan.s.doomedStateNukeTriggerHealth <- titan.GetMaxHealth()
	}

	if ( titan.GetHealth() > titan.s.doomedStateNukeTriggerHealth )
	{
		//printt( "titan health:", titan.GetHealth(), "health to nuke:", titan.s.doomedStateNukeTriggerHealth )
		return
	}

	printt( "NUKE TITAN DOOMED TRIGGER HEALTH REACHED, NUKING! Health:", titan.s.doomedStateNukeTriggerHealth )

	thread AutoTitan_SelfDestruct( titan )
}

function AutoTitan_CanDoRangeCheck( autoTitan )
{
	if ( !( "nextPlayerTitanRangeCheckTime" in autoTitan.s ) )
		autoTitan.s.nextPlayerTitanRangeCheckTime <- -1

	if ( Time() < autoTitan.s.nextPlayerTitanRangeCheckTime )
	{
		return false
	}
	else
	{
		autoTitan.s.nextPlayerTitanRangeCheckTime = Time() + NUKE_TITAN_RANGE_CHECK_SLEEP_SECS
		return true
	}
}