//-------------------------------------------------------------------------
/*
Copyright (C) 2010-2019 EDuke32 developers and contributors
Copyright (C) 2019 Nuke.YKT

This file is part of NBlood.

NBlood is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
//-------------------------------------------------------------------------

#include "ns.h"	// Must come before everything else!

#include "build.h"

#include "blood.h"

BEGIN_BLD_NS

static void zombfThinkSearch(DBloodActor* actor);
static void zombfThinkGoto(DBloodActor* actor);
static void zombfThinkChase(DBloodActor* actor);


AISTATE zombieFIdle = { kAiStateIdle, 0, -1, 0, NULL, NULL, aiThinkTarget, NULL };
AISTATE zombieFChase = { kAiStateChase, 8, -1, 0, NULL, aiMoveForward, zombfThinkChase, NULL };
AISTATE zombieFGoto = { kAiStateMove, 8, -1, 600, NULL, aiMoveForward, zombfThinkGoto, &zombieFIdle };
AISTATE zombieFDodge = { kAiStateMove, 8, -1, 0, NULL, aiMoveDodge, zombfThinkChase, &zombieFChase };
AISTATE zombieFHack = { kAiStateChase, 6, nZombfHackClient, 120, NULL, NULL, NULL, &zombieFChase };
AISTATE zombieFPuke = { kAiStateChase, 9, nZombfPukeClient, 120, NULL, NULL, NULL, &zombieFChase };
AISTATE zombieFThrow = { kAiStateChase, 6, nZombfThrowClient, 120, NULL, NULL, NULL, &zombieFChase };
AISTATE zombieFSearch = { kAiStateSearch, 8, -1, 1800, NULL, aiMoveForward, zombfThinkSearch, &zombieFIdle };
AISTATE zombieFRecoil = { kAiStateRecoil, 5, -1, 0, NULL, NULL, NULL, &zombieFChase };
AISTATE zombieFTeslaRecoil = { kAiStateRecoil, 4, -1, 0, NULL, NULL, NULL, &zombieFChase };

void zombfHackSeqCallback(int, DBloodActor* actor)
{
	if (actor->spr.type != kDudeZombieButcher)
		return;
	if (!actor->ValidateTarget(__FUNCTION__)) return;
	auto target = actor->GetTarget();
	DUDEINFO* pDudeInfo = getDudeInfo(actor->spr.type);
	int height = (pDudeInfo->eyeHeight * actor->spr.yrepeat);
	DUDEINFO* pDudeInfoT = getDudeInfo(target->spr.type);
	int height2 = (pDudeInfoT->eyeHeight * target->spr.yrepeat);
	actFireVector(actor, 0, 0, bcos(actor->int_ang()), bsin(actor->int_ang()), height - height2, kVectorCleaver);
}

void PukeSeqCallback(int, DBloodActor* actor)
{
	if (!actor->ValidateTarget(__FUNCTION__)) return;
	auto target = actor->GetTarget();
	DUDEINFO* pDudeInfo = getDudeInfo(actor->spr.type);
	DUDEINFO* pDudeInfoT = getDudeInfo(target->spr.type);
	int height = (pDudeInfo->eyeHeight * actor->spr.yrepeat);
	int height2 = (pDudeInfoT->eyeHeight * target->spr.yrepeat);
	int tx = actor->xspr.int_TargetPos().X - actor->int_pos().X;
	int ty = actor->xspr.int_TargetPos().Y - actor->int_pos().Y;
	int nAngle = getangle(tx, ty);
	int dx = bcos(nAngle);
	int dy = bsin(nAngle);
	sfxPlay3DSound(actor, 1203, 1, 0);
	actFireMissile(actor, 0, -(height - height2), dx, dy, 0, kMissilePukeGreen);
}

void ThrowSeqCallback(int, DBloodActor* actor)
{
	actFireMissile(actor, 0, -getDudeInfo(actor->spr.type)->eyeHeight, bcos(actor->int_ang()), bsin(actor->int_ang()), 0, kMissileButcherKnife);
}

static void zombfThinkSearch(DBloodActor* actor)
{
	aiChooseDirection(actor, actor->xspr.goalAng);
	aiThinkTarget(actor);
}

static void zombfThinkGoto(DBloodActor* actor)
{
	assert(actor->spr.type >= kDudeBase && actor->spr.type < kDudeMax);
	DUDEINFO* pDudeInfo = getDudeInfo(actor->spr.type);
	auto dvec = actor->xspr.TargetPos.XY() - actor->spr.pos.XY();
	int nAngle = getangle(dvec);
	double nDist = dvec.Length();
	aiChooseDirection(actor, DAngle::fromBuild(nAngle));
	if (nDist < 32 && abs(actor->int_ang() - nAngle) < pDudeInfo->periphery)
		aiNewState(actor, &zombieFSearch);
	aiThinkTarget(actor);
}

static void zombfThinkChase(DBloodActor* actor)
{
	if (actor->GetTarget() == nullptr)
	{
		aiNewState(actor, &zombieFGoto);
		return;
	}
	assert(actor->spr.type >= kDudeBase && actor->spr.type < kDudeMax);
	DUDEINFO* pDudeInfo = getDudeInfo(actor->spr.type);
	if (!actor->ValidateTarget(__FUNCTION__)) return;
	auto target = actor->GetTarget();

	int dx = target->int_pos().X - actor->int_pos().X;
	int dy = target->int_pos().Y - actor->int_pos().Y;
	aiChooseDirection(actor, VecToAngle(dx, dy));
	if (target->xspr.health == 0)
	{
		aiNewState(actor, &zombieFSearch);
		return;
	}
	if (target->IsPlayerActor() && (powerupCheck(&gPlayer[target->spr.type - kDudePlayer1], kPwUpShadowCloak) > 0 || powerupCheck(&gPlayer[target->spr.type - kDudePlayer1], kPwUpDeathMaskUseless) > 0))
	{
		aiNewState(actor, &zombieFSearch);
		return;
	}
	int nDist = approxDist(dx, dy);
	if (nDist <= pDudeInfo->seeDist)
	{
		int nDeltaAngle = getincangle(actor->int_ang(), getangle(dx, dy));
		double height = (pDudeInfo->eyeHeight * actor->spr.yrepeat) * REPEAT_SCALE;
		if (cansee(target->spr.pos, target->sector(), actor->spr.pos.plusZ(-height), actor->sector()))
		{
			if (abs(nDeltaAngle) <= pDudeInfo->periphery)
			{
				aiSetTarget(actor, actor->GetTarget());
				if (nDist < 0x1400 && nDist > 0xe00 && abs(nDeltaAngle) < 85)
				{
					int hit = HitScan(actor, actor->spr.pos.Z, dx, dy, 0, CLIPMASK1, 0);
					switch (hit)
					{
					case -1:
						aiNewState(actor, &zombieFThrow);
						break;
					case 3:
						if (actor->spr.type != gHitInfo.actor()->spr.type)
							aiNewState(actor, &zombieFThrow);
						else
							aiNewState(actor, &zombieFDodge);
						break;
					default:
						aiNewState(actor, &zombieFThrow);
						break;
					}
				}
				else if (nDist < 0x1400 && nDist > 0x600 && abs(nDeltaAngle) < 85)
				{
					int hit = HitScan(actor, actor->spr.pos.Z, dx, dy, 0, CLIPMASK1, 0);
					switch (hit)
					{
					case -1:
						aiNewState(actor, &zombieFPuke);
						break;
					case 3:
						if (actor->spr.type != gHitInfo.actor()->spr.type)
							aiNewState(actor, &zombieFPuke);
						else
							aiNewState(actor, &zombieFDodge);
						break;
					default:
						aiNewState(actor, &zombieFPuke);
						break;
					}
				}
				else if (nDist < 0x400 && abs(nDeltaAngle) < 85)
				{
					int hit = HitScan(actor, actor->spr.pos.Z, dx, dy, 0, CLIPMASK1, 0);
					switch (hit)
					{
					case -1:
						aiNewState(actor, &zombieFHack);
						break;
					case 3:
						if (actor->spr.type != gHitInfo.actor()->spr.type)
							aiNewState(actor, &zombieFHack);
						else
							aiNewState(actor, &zombieFDodge);
						break;
					default:
						aiNewState(actor, &zombieFHack);
						break;
					}
				}
				return;
			}
		}
	}

	aiNewState(actor, &zombieFSearch);
	actor->SetTarget(nullptr);
}

END_BLD_NS