//=============================================================================
// KFWeap_Thrown_C4
//=============================================================================
// C4 explosives
//=============================================================================
// Killing Floor 2
// Copyright (C) 2014-2015 Tripwire Interactive LLC
// Greg Felber / Jeff Robinson
//=============================================================================

class KFWeap_Thrown_C4 extends KFWeap_ThrownBase;

const DETONATE_FIREMODE		= 5; // NEW - IronSights Key

var(Animations) const editconst name DetonateAnim;
var(Animations) const editconst name DetonateLastAnim;

/** List of spawned charges (will be detonated oldest to youngest) */
var array<KFProj_Thrown_C4> DeployedCharges;
var class<KFGFxWorld_C4Screen> ScreenUIClass;
var KFGFxWorld_C4Screen ScreenUI;

var float TimeSinceLastUpdate;
var float UpdateInterval; //Seconds

/** Sound to play upon successful detonation */
var() AkEvent DetonateAkEvent;
/** Sound to play upon attempted but unsuccessful detonation */
var() AkEvent DryFireAkEvent;

/** Same as DeployedCharges.Length, but replicated because charges are only tracked on server */
var int NumDeployedCharges;

replication
{
	if( bNetDirty )
		NumDeployedCharges;
}

/** Route ironsight player input to detonate */
simulated function SetIronSights(bool bNewIronSights)
{
	if ( !Instigator.IsLocallyControlled()  )
	{
		return;
	}

	if ( bNewIronSights )
	{
		StartFire(DETONATE_FIREMODE);
	}
	else
	{
		StopFire(DETONATE_FIREMODE);
	}
}

/** Turn on the UI screen when we equip the healer */
simulated function AttachWeaponTo( SkeletalMeshComponent MeshCpnt, optional Name SocketName )
{
	super.AttachWeaponTo( MeshCpnt, SocketName );

	if( Instigator != none && Instigator.IsLocallyControlled() )
	{
		// Create the screen's UI piece
		if (ScreenUI == none)
		{
			ScreenUI = new( self ) ScreenUIClass;
			ScreenUI.Init();
			ScreenUI.Start(true);
		}

		if ( ScreenUI != none)
		{
			ScreenUI.SetPause(false);
		}
	}
}

/** Turn off the UI screen when we unequip the weapon */
simulated function DetachWeapon()
{
	super.DetachWeapon();
	if ( Instigator != none && Instigator.IsLocallyControlled() && ScreenUI != none )
	{
		ScreenUI.SetPause();
	}
}

simulated event Destroyed()
{
	if ( Instigator != none && Instigator.IsLocallyControlled() && ScreenUI != none)
	{
		ScreenUI.Close();
	}
	super.Destroyed();
}

/** @see Weapon::Tick */
simulated event Tick(float DeltaTime)
{
	Super.Tick(DeltaTime);
	TimeSinceLastUpdate+=DeltaTime;
	if(TimeSinceLastUpdate > UpdateInterval)
	{
		UpdateScreenUI();
	}
}


/** Only update the screen screen if we have the welder equipped and it's screen values have changed */
simulated function UpdateScreenUI()
{
	if ( Instigator != none && Instigator.IsLocallyControlled() && Instigator.Weapon == self )
	{
		if ( ScreenUI != none )
		{
			ScreenUI.SetMaxCharges(GetMaxAmmoAmount(0));
			ScreenUI.SetActiveCharges(NumDeployedCharges);
			TimeSinceLastUpdate=0.0f;
		}
	}
}

/** Overridded to add spawned charge to list of spawned charges */
simulated function Projectile ProjectileFire()
{
	local Projectile P;
	local KFProj_Thrown_C4 Charge;

	P = super.ProjectileFire();

	Charge = KFProj_Thrown_C4( P );
	if( Charge != none )
	{
		if(SkinItemId > 0)
		{
			Charge.WeaponSkinId = SkinItemId;
			Charge.SetWeaponSkin(SkinItemId);
			Charge.bNetDirty = true;
		}

		DeployedCharges.AddItem( Charge );
		NumDeployedCharges = DeployedCharges.Length;
		bForceNetUpdate = true;
	}

	return P;
}

/** Detonates the oldest charge */
simulated function Detonate()
{
	// auto switch weapon when out of ammo and after detonating the last deployed charge
	if( Role == ROLE_Authority )
	{
		if( DeployedCharges.Length > 0 )
		{
			DeployedCharges[0].Detonate();
		}

		if( !HasAnyAmmo() && NumDeployedCharges == 0 )
		{
			if( CanSwitchWeapons() )
			{
	            Instigator.Controller.ClientSwitchToBestWeapon(false);
			}
		}
	}
}

/** Removes a charge from the list using either an index or an actor and updates NumDeployedCharges */
function RemoveDeployedCharge( optional int ChargeIndex = INDEX_NONE, optional Actor ChargeActor )
{
	if( ChargeIndex == INDEX_NONE )
	{
		if( ChargeActor != none )
		{
			ChargeIndex = DeployedCharges.Find( ChargeActor );
		}
	}

	if( ChargeIndex != INDEX_NONE )
	{
		DeployedCharges.Remove( ChargeIndex, 1 );
		NumDeployedCharges = DeployedCharges.Length;
		bForceNetUpdate = true;
	}
}

/** Allows pickup to update weapon properties
  * Overridden to allow C4 to update charges
  */
function SetOriginalValuesFromPickup( KFWeapon PickedUpWeapon )
{
	local int i;

	super.SetOriginalValuesFromPickup( PickedUpWeapon );

	DeployedCharges = KFWeap_Thrown_C4(PickedUpWeapon).DeployedCharges;
	NumDeployedCharges = DeployedCharges.Length;
	bForceNetUpdate = true;

	for( i = 0; i < NumDeployedCharges; ++i )
	{
		// charge alerts (beep, light) need current instigator
		DeployedCharges[i].Instigator = Instigator;
        DeployedCharges[i].SetOwner(self);
		if( Instigator.Controller != none )
	{
			DeployedCharges[i].InstigatorController = Instigator.Controller;
		}
	}
}

 /**
 * Returns true if this weapon uses a secondary ammo pool
 */
static simulated event bool UsesAmmo()
{
    return true;
}

simulated function bool HasAmmo( byte FireModeNum, optional int Amount )
{
	if( FireModeNum == DETONATE_FIREMODE )
	{
		return NumDeployedCharges > 0;
	}

	return super.HasAmmo( FireModeNum, Amount );
}

simulated function BeginFire( byte FireModeNum )
{
	if( FireModeNum == DETONATE_FIREMODE && (IsInState('WeaponSprinting') || NumDeployedCharges <= 0))
	{
		PrepareAndDetonate();
	}
	else
	{
		super.BeginFire( FireModeNum );
	}
}

simulated function PrepareAndDetonate()
{
	local name DetonateAnimName;
	local float AnimDuration;
	local bool bInSprintState;

	DetonateAnimName = ShouldPlayLastAnims() ? DetonateLastAnim : DetonateAnim;
	AnimDuration = MySkelMesh.GetAnimLength( DetonateAnimName );
	bInSprintState = IsInState( 'WeaponSprinting' );

	if( WorldInfo.NetMode != NM_DedicatedServer )
	{
		if( NumDeployedCharges > 0 )
		{
			PlaySoundBase( DetonateAkEvent, true );
		}
		else
		{
			PlaySoundBase( DryFireAkEvent, true );
		}

		if( bInSprintState )
		{
			AnimDuration *= 0.25f;
			PlayAnimation( DetonateAnimName, AnimDuration );
		}
		else
		{
			PlayAnimation( DetonateAnimName );
		}
	}

	if( Role == ROLE_Authority )
	{
		Detonate();
	}

	IncrementFlashCount();

	if( bInSprintState )
	{
		SetTimer( AnimDuration * 0.8f, false, nameof(PlaySprintStart) );
	}
	else
	{
		SetTimer( AnimDuration * 0.5f, false, nameof(GotoActiveState) );
	}
}

// do nothing, as we have no alt fire mode
simulated function AltFireMode();

/** Allow weapons with abnormal state transitions to always use zed time resist*/
simulated function bool HasAlwaysOnZedTimeResist()
{
    return true;
}

/*********************************************************************************************
 * State Active
 * A Weapon this is being held by a pawn should be in the active state.  In this state,
 * a weapon should loop any number of idle animations, as well as check the PendingFire flags
 * to see if a shot has been fired.
 *********************************************************************************************/

simulated state Active
{
	/** Overridden to prevent playing fidget if play has no more ammo */
	simulated function bool CanPlayIdleFidget(optional bool bOnReload)
	{
		if( !HasAmmo(0) )
		{
			return false;
		}

		return super.CanPlayIdleFidget( bOnReload );
	}
}

/*********************************************************************************************
 * State WeaponDetonating
 * The weapon is in this state while detonating a charge
*********************************************************************************************/

simulated function GotoActiveState();

simulated state WeaponDetonating
{
	ignores AllowSprinting;

	simulated event BeginState( name PreviousStateName )
	{
		PrepareAndDetonate();
	}

	simulated function GotoActiveState()
	{
		GotoState('Active');
	}
}

/*********************************************************************************************
 * State WeaponThrowing
 * Handles throwing weapon (similar to state GrenadeFiring)
 *********************************************************************************************/

simulated state WeaponThrowing
{
	/** Never refires.  Must re-enter this state instead. */
	simulated function bool ShouldRefire()
	{
		return false;
	}

    simulated function EndState(Name NextStateName)
    {
        local KFPerk InstigatorPerk;

        Super.EndState(NextStateName);

        //Targeted fix for Demolitionist w/ the C4.  It should remain in zed time  while waiting on
        //      the fake reload to be triggered.  This will return 0 for other perks.
        InstigatorPerk = GetPerk();
        if( InstigatorPerk != none )
        {
            SetZedTimeResist( InstigatorPerk.GetZedTimeModifier(self) );
        }
    }
}

/*********************************************************************************************
 * State WeaponEquipping
 * The Weapon is in this state while transitioning from Inactive to Active state.
 * Typically, the weapon will remain in this state while its selection animation is being played.
 * While in this state, the weapon cannot be fired.
*********************************************************************************************/

simulated state WeaponEquipping
{
	simulated event BeginState( name PreviousStateName )
	{
		super.BeginState( PreviousStateName );

		// perform a "reload" if we refilled our ammo from empty while it was unequipped
		if( !HasAmmo(THROW_FIREMODE) && HasSpareAmmo() )
		{
			PerformArtificialReload();
		}
		StopFire(DETONATE_FIREMODE);
	}
}

/*********************************************************************************************
 * State WeaponPuttingDown
 * Putting down weapon in favor of a new one.
 * Weapon is transitioning to the Inactive state.
 *
 * Detonating while putting down causes C4 not to be put down, which causes problems, so let's
 * just ignore SetIronSights, which causes detonation
*********************************************************************************************/

simulated state WeaponPuttingDown
{
	ignores SetIronSights;

	simulated event BeginState( name PreviousStateName )
	{
		super.BeginState( PreviousStateName );
		StopFire(DETONATE_FIREMODE);
	}
}

/*********************************************************************************************
 * @name	Trader
 *********************************************************************************************/

/** Returns trader filter index based on weapon type */
static simulated event EFilterTypeUI GetTraderFilter()
{
	return FT_Explosive;
}

defaultproperties
{
	// start in detonate mode so that an attempt to detonate before any charges are thrown results in
	// the proper third-person anim
	CurrentFireMode=DETONATE_FIREMODE

	// Zooming/Position
	PlayerViewOffset=(X=6.0,Y=2,Z=-4)
	FireOffset=(X=25,Y=15)
	UpdateInterval=0.25f

	// Content
	PackageKey="C4"
	FirstPersonMeshName="Wep_1P_C4_MESH.Wep_1stP_C4_Rig"
	FirstPersonAnimSetNames(0)="Wep_1P_C4_ANIM.Wep_1P_C4_ANIM"
	PickupMeshName="WEP_3P_C4_MESH.Wep_C4_Pickup"
	AttachmentArchetypeName="WEP_C4_ARCH.Wep_C4_3P"

	ScreenUIClass=class'KFGFxWorld_C4Screen'

	// Anim
	FireAnim=C4_Throw
	FireLastAnim=C4_Throw_Last

	DetonateAnim=Detonate
	DetonateLastAnim=Detonate_Last

	// Ammo
	MagazineCapacity[0]=1
	SpareAmmoCapacity[0]=2
	InitialSpareMags[0]=1
	AmmoPickupScale[0]=1.0

	// THROW_FIREMODE
	FireInterval(THROW_FIREMODE)=0.25
	FireModeIconPaths(THROW_FIREMODE)=Texture2D'ui_firemodes_tex.UI_FireModeSelect_Grenade'
	WeaponProjectiles(THROW_FIREMODE)=class'KFProj_Thrown_C4'

	// DETONATE_FIREMODE
	FiringStatesArray(DETONATE_FIREMODE)=WeaponDetonating
	WeaponFireTypes(DETONATE_FIREMODE)=EWFT_Custom
	AmmoCost(DETONATE_FIREMODE)=0

	// BASH_FIREMODE
	InstantHitDamageTypes(BASH_FIREMODE)=class'KFDT_Bludgeon_C4'
	InstantHitDamage(BASH_FIREMODE)=23

	// Inventory / Grouping
	InventoryGroup=IG_Equipment
	GroupPriority=25
	WeaponSelectTexture=Texture2D'WEP_UI_C4_TEX.UI_WeaponSelect_C4'
	InventorySize=3

   	AssociatedPerkClasses(0)=class'KFPerk_Demolitionist'

   	DetonateAkEvent=AkEvent'WW_WEP_EXP_C4.Play_WEP_EXP_C4_Handling_Detonate'
	DryFireAkEvent=AkEvent'WW_WEP_EXP_C4.Play_WEP_EXP_C4_DryFire'

	// Weapon Upgrade stat boosts
	//WeaponUpgrades[1]=(IncrementDamage=1.05f,IncrementWeight=1)
	//WeaponUpgrades[2]=(IncrementDamage=1.1f,IncrementWeight=2)
	//WeaponUpgrades[3]=(IncrementDamage=1.15f,IncrementWeight=3)
}