//===========================================================================//
// File:	mechweap.cpp                                                        //
// Project: BattleTech           Brick: Mech weapons                          //
// Contents: MechWeapon -- the base weapon subsystem                         //
//---------------------------------------------------------------------------//
// Copyright (C) 1995, Virtual World Entertainment, Inc.                     //
// All Rights reserved worldwide                                             //
// This unpublished sourcecode is PROPRIETARY and CONFIDENTIAL               //
//===========================================================================//

#include <bt.hpp>
#pragma hdrstop

#if !defined(MECHWEAP_HPP)
#	include <mechweap.hpp>
#endif

#if !defined(MECH_HPP)
#	include <mech.hpp>
#endif

#if !defined(SEGMENT_HPP)
#	include <segment.hpp>
#endif

#include <string.h>

Derivation
	MechWeapon::ClassDerivations(
		PoweredSubsystem::ClassDerivations,
		"MechWeapon"
	);

//
//#############################################################################
// Message handlers.  MechWeapon publishes no handlers of its own yet (the
// weapon fire/damage handler wave), but the set MUST be a real defined object:
// the surviving CODE PPC.CPP binds the inherited name (`PPC::MessageHandlers`)
// into PPC::DefaultData, and a declared-but-undefined static links as a
// zero-filled common block -- the same silent-NULL trap as the
// Emitter::AttributeIndex crash (see MECHWEAP.NOTES.md).
//#############################################################################
//
MechWeapon::MessageHandlerSet
	MechWeapon::MessageHandlers(
		0,
		NULL,
		Subsystem::MessageHandlers
	);

MechWeapon::SharedData
	MechWeapon::DefaultData(
		MechWeapon::ClassDerivations,
		MechWeapon::MessageHandlers,
		Subsystem::AttributeIndex,
		Subsystem::StateCount
	);

MechWeapon::MechWeapon(
	Mech				*owner,
	int					subsystem_ID,
	SubsystemResource	*subsystem_resource,
	SharedData			&shared_data
):
	PoweredSubsystem(owner, subsystem_ID, subsystem_resource, shared_data)
{
	Check(owner);
	Check_Pointer(subsystem_resource);

	rechargeRate			= subsystem_resource->rechargeRate;
	weaponRange				= subsystem_resource->weaponRange;
	damageAmount			= subsystem_resource->damageAmount;
	damageType				= subsystem_resource->damageType;
	heatCostToFire			= subsystem_resource->heatCostToFire;
	targetWithinRange		= False;

	damageData.damageType	= damageType;
	damageData.damageAmount	= damageAmount;

	//
	// REAR-FIRING resolve (the binary ctor tail @004b99a8): a weapon is
	// rear-mounted when its MOUNT SEGMENT's site name carries the 'b' (back)
	// marker -- the back gun ports (sitelbgunport / siterbgunport) are the only
	// port names containing it.  Rear-mounted weapons fire only into the
	// LOOK-BACK view; everything else fires forward.  The look-state commit
	// (Mech::CommitLookState) re-arms viewFireEnable on every view change; a
	// weapon spawns armed for the forward view.
	//
	rearFiring = False;
	{
		EntitySegment *mount = owner->GetSegment(GetSegmentIndex());
		if (mount != NULL)
		{
			const char *mount_name = mount->GetName();
			if (mount_name != NULL && strstr(mount_name, "b") != NULL)
			{
				rearFiring = True;
			}
		}
	}
	viewFireEnable = (rearFiring == False);

	if (getenv("BT_MECH_LOG"))
	{
		EntitySegment *mount = owner->GetSegment(GetSegmentIndex());
		DEBUG_STREAM << "[weap] '" << GetName()
			<< "' seg=" << GetSegmentIndex() << " mount=";
		if (mount != NULL)
		{
			DEBUG_STREAM << mount->GetName();
		}
		else
		{
			DEBUG_STREAM << "<none>";
		}
		DEBUG_STREAM << " rear=" << (int)rearFiring << endl << flush;
	}

	Check_Fpu();
}

MechWeapon::~MechWeapon()
{
}

Logical
	MechWeapon::TestClass(Mech &)
{
	return True;
}

Logical
	MechWeapon::TestInstance() const
{
	return IsDerivedFrom(ClassDerivations);
}

//
//#############################################################################
// FireWeapon  Abstract -- each concrete weapon (Emitter/PPC, ProjectileWeapon/
// Gauss/MissileLauncher) overrides this.  Reaching the base is a bug.
//#############################################################################
//
void
	MechWeapon::FireWeapon()
{
	Fail("MechWeapon::FireWeapon -- should not be here (abstract)");
}

//
//#############################################################################
// SendDamage  Deliver this weapon's damage to a struck entity.  The damage/
// networking path is not yet reconstructed.
//#############################################################################
//
void
	MechWeapon::SendDamage(Entity *, Damage &)
{
	Fail("MechWeapon::SendDamage -- mechweap.cpp not yet reconstructed");
}

//
//#############################################################################
// CreateStreamedSubsystem  Model-load-time construction.  Not yet reconstructed.
//#############################################################################
//
int
	MechWeapon::CreateStreamedSubsystem(
		ResourceFile				*,
		NotationFile				*,
		const char					*,
		const char					*,
		SubsystemResource			*,
		NotationFile				*,
		const ResourceDirectories	*,
		int
	)
{
	Fail("MechWeapon::CreateStreamedSubsystem -- mechweap.cpp not yet reconstructed");
	return 0;
}