/*
Copyright (C) 1997-2001 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
/*
==============================================================================

parasite

==============================================================================
*/

#include "../g_local.h"
#include "m_parasite.h"

static int sound_pain1;
static int sound_pain2;
static int sound_die;
static int sound_launch;
static int sound_impact;
static int sound_suck;
static int sound_reelin;
static int sound_sight;
static int sound_tap;
static int sound_scratch;
static int sound_search;

void parasite_stand(edict_t *self);
void parasite_start_run(edict_t *self);
void parasite_run(edict_t *self);
void parasite_walk(edict_t *self);
void parasite_start_walk(edict_t *self);
void parasite_end_fidget(edict_t *self);
void parasite_do_fidget(edict_t *self);
void parasite_refidget(edict_t *self);

void parasite_launch(edict_t *self) { gi.sound(self, CHAN_WEAPON, sound_launch, 1, ATTN_NORM, 0); }

void parasite_reel_in(edict_t *self) { gi.sound(self, CHAN_WEAPON, sound_reelin, 1, ATTN_NORM, 0); }

void parasite_sight(edict_t *self, edict_t *other) { gi.sound(self, CHAN_WEAPON, sound_sight, 1, ATTN_NORM, 0); }

void parasite_tap(edict_t *self) { gi.sound(self, CHAN_WEAPON, sound_tap, 1, ATTN_IDLE, 0); }

void parasite_scratch(edict_t *self) { gi.sound(self, CHAN_WEAPON, sound_scratch, 1, ATTN_IDLE, 0); }

void parasite_search(edict_t *self) { gi.sound(self, CHAN_WEAPON, sound_search, 1, ATTN_IDLE, 0); }

mframe_t parasite_frames_start_fidget[] = {
    {ai_stand, 0, NULL}, {ai_stand, 0, NULL}, {ai_stand, 0, NULL}, {ai_stand, 0, NULL}};
mmove_t parasite_move_start_fidget = {FRAME_stand18, FRAME_stand21, parasite_frames_start_fidget, parasite_do_fidget};

mframe_t parasite_frames_fidget[] = {{ai_stand, 0, parasite_scratch}, {ai_stand, 0, NULL}, {ai_stand, 0, NULL},
                                     {ai_stand, 0, parasite_scratch}, {ai_stand, 0, NULL}, {ai_stand, 0, NULL}};
mmove_t parasite_move_fidget = {FRAME_stand22, FRAME_stand27, parasite_frames_fidget, parasite_refidget};

mframe_t parasite_frames_end_fidget[] = {{ai_stand, 0, parasite_scratch},
                                         {ai_stand, 0, NULL},
                                         {ai_stand, 0, NULL},
                                         {ai_stand, 0, NULL},
                                         {ai_stand, 0, NULL},
                                         {ai_stand, 0, NULL},
                                         {ai_stand, 0, NULL},
                                         {ai_stand, 0, NULL}};
mmove_t parasite_move_end_fidget = {FRAME_stand28, FRAME_stand35, parasite_frames_end_fidget, parasite_stand};

void parasite_end_fidget(edict_t *self) { self->monsterinfo.currentmove = &parasite_move_end_fidget; }

void parasite_do_fidget(edict_t *self) { self->monsterinfo.currentmove = &parasite_move_fidget; }

void parasite_refidget(edict_t *self) {
  if(random() <= 0.8)
    self->monsterinfo.currentmove = &parasite_move_fidget;
  else
    self->monsterinfo.currentmove = &parasite_move_end_fidget;
}

void parasite_idle(edict_t *self) { self->monsterinfo.currentmove = &parasite_move_start_fidget; }

mframe_t parasite_frames_stand[] = {{ai_stand, 0, NULL}, {ai_stand, 0, NULL},         {ai_stand, 0, parasite_tap},
                                    {ai_stand, 0, NULL}, {ai_stand, 0, parasite_tap}, {ai_stand, 0, NULL},
                                    {ai_stand, 0, NULL}, {ai_stand, 0, NULL},         {ai_stand, 0, parasite_tap},
                                    {ai_stand, 0, NULL}, {ai_stand, 0, parasite_tap}, {ai_stand, 0, NULL},
                                    {ai_stand, 0, NULL}, {ai_stand, 0, NULL},         {ai_stand, 0, parasite_tap},
                                    {ai_stand, 0, NULL}, {ai_stand, 0, parasite_tap}};
mmove_t parasite_move_stand = {FRAME_stand01, FRAME_stand17, parasite_frames_stand, parasite_stand};

void parasite_stand(edict_t *self) { self->monsterinfo.currentmove = &parasite_move_stand; }

mframe_t parasite_frames_run[] = {{ai_run, 30, NULL}, {ai_run, 30, NULL}, {ai_run, 22, NULL}, {ai_run, 19, NULL},
                                  {ai_run, 24, NULL}, {ai_run, 28, NULL}, {ai_run, 25, NULL}};
mmove_t parasite_move_run = {FRAME_run03, FRAME_run09, parasite_frames_run, NULL};

mframe_t parasite_frames_start_run[] = {
    {ai_run, 0, NULL},
    {ai_run, 30, NULL},
};
mmove_t parasite_move_start_run = {FRAME_run01, FRAME_run02, parasite_frames_start_run, parasite_run};

mframe_t parasite_frames_stop_run[] = {{ai_run, 20, NULL}, {ai_run, 20, NULL}, {ai_run, 12, NULL},
                                       {ai_run, 10, NULL}, {ai_run, 0, NULL},  {ai_run, 0, NULL}};
mmove_t parasite_move_stop_run = {FRAME_run10, FRAME_run15, parasite_frames_stop_run, NULL};

void parasite_start_run(edict_t *self) {
  if(self->monsterinfo.aiflags & AI_STAND_GROUND)
    self->monsterinfo.currentmove = &parasite_move_stand;
  else
    self->monsterinfo.currentmove = &parasite_move_start_run;
}

void parasite_run(edict_t *self) {
  if(self->monsterinfo.aiflags & AI_STAND_GROUND)
    self->monsterinfo.currentmove = &parasite_move_stand;
  else
    self->monsterinfo.currentmove = &parasite_move_run;
}

mframe_t parasite_frames_walk[] = {{ai_walk, 30, NULL}, {ai_walk, 30, NULL}, {ai_walk, 22, NULL}, {ai_walk, 19, NULL},
                                   {ai_walk, 24, NULL}, {ai_walk, 28, NULL}, {ai_walk, 25, NULL}};
mmove_t parasite_move_walk = {FRAME_run03, FRAME_run09, parasite_frames_walk, parasite_walk};

mframe_t parasite_frames_start_walk[] = {{ai_walk, 0, NULL}, {ai_walk, 30, parasite_walk}};
mmove_t parasite_move_start_walk = {FRAME_run01, FRAME_run02, parasite_frames_start_walk, NULL};

mframe_t parasite_frames_stop_walk[] = {{ai_walk, 20, NULL}, {ai_walk, 20, NULL}, {ai_walk, 12, NULL},
                                        {ai_walk, 10, NULL}, {ai_walk, 0, NULL},  {ai_walk, 0, NULL}};
mmove_t parasite_move_stop_walk = {FRAME_run10, FRAME_run15, parasite_frames_stop_walk, NULL};

void parasite_start_walk(edict_t *self) { self->monsterinfo.currentmove = &parasite_move_start_walk; }

void parasite_walk(edict_t *self) { self->monsterinfo.currentmove = &parasite_move_walk; }

mframe_t parasite_frames_pain1[] = {{ai_move, 0, NULL},  {ai_move, 0, NULL},  {ai_move, 0, NULL}, {ai_move, 0, NULL},
                                    {ai_move, 0, NULL},  {ai_move, 0, NULL},  {ai_move, 6, NULL}, {ai_move, 16, NULL},
                                    {ai_move, -6, NULL}, {ai_move, -7, NULL}, {ai_move, 0, NULL}};
mmove_t parasite_move_pain1 = {FRAME_pain101, FRAME_pain111, parasite_frames_pain1, parasite_start_run};

void parasite_pain(edict_t *self, edict_t *other, float kick, int damage) {
  if(ent_read_health(self)->value < (cv_get(ent_read_max_health(self)) / 2))
    self->s.skinnum = 1;

  if(level.time < self->pain_debounce_time)
    return;

  self->pain_debounce_time = level.time + 3;

  if(skill->value == 3)
    return; // no pain anims in nightmare

  if(random() < 0.5)
    gi.sound(self, CHAN_VOICE, sound_pain1, 1, ATTN_NORM, 0);
  else
    gi.sound(self, CHAN_VOICE, sound_pain2, 1, ATTN_NORM, 0);

  self->monsterinfo.currentmove = &parasite_move_pain1;
}

static bool parasite_drain_attack_ok(vec3_t start, vec3_t end) {
  vec3_t dir, angles;

  // check for max distance
  VectorSubtract(start, end, dir);
  if(VectorLength(dir) > 256)
    return false;

  // check for min/max pitch
  vectoangles(dir, angles);
  if(angles[0] < -180)
    angles[0] += 360;
  if(fabs(angles[0]) > 30)
    return false;

  return true;
}

void parasite_drain_attack(edict_t *self) {
  vec3_t offset, start, f, r, end, dir;
  trace_t tr;
  int damage;

  AngleVectors(self->s.angles, f, r, NULL);
  VectorSet(offset, 24, 0, 6);
  G_ProjectSource(self->s.origin, offset, f, r, start);

  VectorCopy(self->enemy->s.origin, end);
  if(!parasite_drain_attack_ok(start, end)) {
    end[2] = self->enemy->s.origin[2] + self->enemy->maxs[2] - 8;
    if(!parasite_drain_attack_ok(start, end)) {
      end[2] = self->enemy->s.origin[2] + self->enemy->mins[2] + 8;
      if(!parasite_drain_attack_ok(start, end))
        return;
    }
  }
  VectorCopy(self->enemy->s.origin, end);

  tr = gi.trace(self->s.cmodel_index, start, NULL, NULL, end, self, MASK_SHOT);
  if(tr.ent != self->enemy)
    return;

  if(self->s.frame == FRAME_drain03) {
    damage = 5;
    gi.sound(self->enemy, CHAN_AUTO, sound_impact, 1, ATTN_NORM, 0);
  } else {
    if(self->s.frame == FRAME_drain04)
      gi.sound(self, CHAN_WEAPON, sound_suck, 1, ATTN_NORM, 0);
    damage = 2;
  }

  gi.WriteByte(svc_temp_entity);
  gi.WriteByte(TE_PARASITE_ATTACK);
  gi.WriteShort(self - g_edicts);
  gi.WritePosition(start);
  gi.WritePosition(end);
  gi.multicast(self->s.cmodel_index, self->s.origin, MULTICAST_PVS);

  VectorSubtract(start, end, dir);
  T_Damage(self->enemy, self, self, dir, self->enemy->s.origin, vec3_origin, damage, 0, DAMAGE_NO_KNOCKBACK,
           MOD_UNKNOWN);
}

mframe_t parasite_frames_drain[] = {{ai_charge, 0, parasite_launch},
                                    {ai_charge, 0, NULL},
                                    {ai_charge, 15, parasite_drain_attack}, // Target hits
                                    {ai_charge, 0, parasite_drain_attack},  // drain
                                    {ai_charge, 0, parasite_drain_attack},  // drain
                                    {ai_charge, 0, parasite_drain_attack},  // drain
                                    {ai_charge, 0, parasite_drain_attack},  // drain
                                    {ai_charge, -2, parasite_drain_attack}, // drain
                                    {ai_charge, -2, parasite_drain_attack}, // drain
                                    {ai_charge, -3, parasite_drain_attack}, // drain
                                    {ai_charge, -2, parasite_drain_attack}, // drain
                                    {ai_charge, 0, parasite_drain_attack},  // drain
                                    {ai_charge, -1, parasite_drain_attack}, // drain
                                    {ai_charge, 0, parasite_reel_in},       // let go
                                    {ai_charge, -2, NULL},
                                    {ai_charge, -2, NULL},
                                    {ai_charge, -3, NULL},
                                    {ai_charge, 0, NULL}};
mmove_t parasite_move_drain = {FRAME_drain01, FRAME_drain18, parasite_frames_drain, parasite_start_run};

mframe_t parasite_frames_break[] = {
    {ai_charge, 0, NULL}, {ai_charge, -3, NULL}, {ai_charge, 1, NULL},  {ai_charge, 2, NULL},  {ai_charge, -3, NULL},
    {ai_charge, 1, NULL}, {ai_charge, 1, NULL},  {ai_charge, 3, NULL},  {ai_charge, 0, NULL},  {ai_charge, -18, NULL},
    {ai_charge, 3, NULL}, {ai_charge, 9, NULL},  {ai_charge, 6, NULL},  {ai_charge, 0, NULL},  {ai_charge, -18, NULL},
    {ai_charge, 0, NULL}, {ai_charge, 8, NULL},  {ai_charge, 9, NULL},  {ai_charge, 0, NULL},  {ai_charge, -18, NULL},
    {ai_charge, 0, NULL}, {ai_charge, 0, NULL}, // airborne
    {ai_charge, 0, NULL},                       // airborne
    {ai_charge, 0, NULL},                       // slides
    {ai_charge, 0, NULL},                       // slides
    {ai_charge, 0, NULL},                       // slides
    {ai_charge, 0, NULL},                       // slides
    {ai_charge, 4, NULL}, {ai_charge, 11, NULL}, {ai_charge, -2, NULL}, {ai_charge, -5, NULL}, {ai_charge, 1, NULL}};
mmove_t parasite_move_break = {FRAME_break01, FRAME_break32, parasite_frames_break, parasite_start_run};

/*
===
Break Stuff Ends
===
*/

void parasite_attack(edict_t *self) {
  //	if (random() <= 0.2)
  //		self->monsterinfo.currentmove = &parasite_move_break;
  //	else
  self->monsterinfo.currentmove = &parasite_move_drain;
}

/*
===
Death Stuff Starts
===
*/

void parasite_dead(edict_t *self) {
  VectorSet(self->mins, -16, -16, -24);
  VectorSet(self->maxs, 16, 16, -8);
  self->movetype = MOVETYPE_TOSS;
  self->svflags |= SVF_DEADMONSTER;
  self->nextthink = 0;
  gi.linkentity(self);
}

mframe_t parasite_frames_death[] = {{ai_move, 0, NULL}, {ai_move, 0, NULL}, {ai_move, 0, NULL}, {ai_move, 0, NULL},
                                    {ai_move, 0, NULL}, {ai_move, 0, NULL}, {ai_move, 0, NULL}};
mmove_t parasite_move_death = {FRAME_death101, FRAME_death107, parasite_frames_death, parasite_dead};

void parasite_die(edict_t *self, edict_t *inflictor, edict_t *attacker, int damage, vec3_t point) {
  int n;

  // check for gib
  if(ent_read_health(self)->value <= self->gib_health) {
    gi.sound(self, CHAN_VOICE, gi.soundindex("misc/udeath.wav"), 1, ATTN_NORM, 0);
    for(n = 0; n < 2; n++)
      ThrowGib(self, "models/objects/gibs/bone/tris.md2", damage, GIB_ORGANIC);
    for(n = 0; n < 4; n++)
      ThrowGib(self, "models/objects/gibs/sm_meat/tris.md2", damage, GIB_ORGANIC);
    ThrowHead(self, "models/objects/gibs/head2/tris.md2", damage, GIB_ORGANIC);
    self->deadflag = DEAD_DEAD;
    return;
  }

  if(self->deadflag == DEAD_DEAD)
    return;

  // regular death
  gi.sound(self, CHAN_VOICE, sound_die, 1, ATTN_NORM, 0);
  self->deadflag = DEAD_DEAD;
  self->takedamage = DAMAGE_YES;
  self->monsterinfo.currentmove = &parasite_move_death;
}

/*
===
End Death Stuff
===
*/

/*QUAKED monster_parasite (1 .5 0) (-16 -16 -24) (16 16 32) Ambush Trigger_Spawn Sight
 */
void SP_monster_parasite(edict_t *self) {
  if(deathmatch->value) {
    G_FreeEdict(self);
    return;
  }

  sound_pain1 = gi.soundindex("parasite/parpain1.wav");
  sound_pain2 = gi.soundindex("parasite/parpain2.wav");
  sound_die = gi.soundindex("parasite/pardeth1.wav");
  sound_launch = gi.soundindex("parasite/paratck1.wav");
  sound_impact = gi.soundindex("parasite/paratck2.wav");
  sound_suck = gi.soundindex("parasite/paratck3.wav");
  sound_reelin = gi.soundindex("parasite/paratck4.wav");
  sound_sight = gi.soundindex("parasite/parsght1.wav");
  sound_tap = gi.soundindex("parasite/paridle1.wav");
  sound_scratch = gi.soundindex("parasite/paridle2.wav");
  sound_search = gi.soundindex("parasite/parsrch1.wav");

  self->s.modelindex = gi.modelindex("models/monsters/parasite/tris.md2");
  VectorSet(self->mins, -16, -16, -24);
  VectorSet(self->maxs, 16, 16, 24);
  self->movetype = MOVETYPE_STEP;
  self->solid = SOLID_BBOX;

  dv_set(ent_write_health(self), 175);
  self->gib_health = -50;
  self->mass = 250;

  self->pain = parasite_pain;
  self->die = parasite_die;

  self->monsterinfo.stand = parasite_stand;
  self->monsterinfo.walk = parasite_start_walk;
  self->monsterinfo.run = parasite_start_run;
  self->monsterinfo.attack = parasite_attack;
  self->monsterinfo.sight = parasite_sight;
  self->monsterinfo.idle = parasite_idle;

  gi.linkentity(self);

  self->monsterinfo.currentmove = &parasite_move_stand;
  self->monsterinfo.scale = MODEL_SCALE;

  walkmonster_start(self);
}