/*
   Copyright (C) Prikol Software 1996-1997
   Copyright (C) Aleksey Volynskov 1996-1997
   Copyright (C) <ARembo@gmail.com> 2011

   This file is part of the Doom2D:Rembo project.

   Doom2D:Rembo 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.

   Doom2D:Rembo 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, see <http://www.gnu.org/licenses/> or
   write to the Free Software Foundation, Inc.,
   51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
*/

#include "glob.h"
#include <stdlib.h>
#include "view.h"
#include "bmap.h"
#include "dots.h"
#include "smoke.h"
#include "weapons.h"
#include "misc.h"

extern int hit_xv,hit_yv;

void bfg_fly(int x,int y,int own);

enum{NONE=0,ROCKET,PLASMA,APLASMA,BALL1,BALL2,BALL7,BFGBALL,BFGHIT,
     MANF,REVF,FIRE};

#pragma pack(1)
typedef struct{
  obj_t o;
  byte t,s;
  int own;
  short target;
}weapon_t;
#pragma pack()

static void *snd[14],*spr[49*2];
static char sprd[49*2];
static weapon_t wp[MAXWPN];

static void throw(int,int,int,int,int,int,int,int);

void WP_savegame (FILE *h) {
  int i, n;
  for (n = MAXWPN - 1; n >= 0 && wp[n].t == 0; n--) {
    // empty
  }
  n += 1;
  myfwrite32(n, h);
  for (i = 0; i < n; i++) {
    myfwrite32(wp[i].o.x, h);
    myfwrite32(wp[i].o.y, h);
    myfwrite32(wp[i].o.xv, h);
    myfwrite32(wp[i].o.yv, h);
    myfwrite32(wp[i].o.vx, h);
    myfwrite32(wp[i].o.vy, h);
    myfwrite32(wp[i].o.r, h);
    myfwrite32(wp[i].o.h, h);
    myfwrite8(wp[i].t, h);
    myfwrite8(wp[i].s, h);
    myfwrite32(wp[i].own, h);
    myfwrite16(wp[i].target, h);
  }
}

void WP_loadgame (FILE *h) {
  int i, n;
  myfread32(&n, h);
  for (i = 0; i < n; i++) {
    myfread32(&wp[i].o.x, h);
    myfread32(&wp[i].o.y, h);
    myfread32(&wp[i].o.xv, h);
    myfread32(&wp[i].o.yv, h);
    myfread32(&wp[i].o.vx, h);
    myfread32(&wp[i].o.vy, h);
    myfread32(&wp[i].o.r, h);
    myfread32(&wp[i].o.h, h);
    myfread8(&wp[i].t, h);
    myfread8(&wp[i].s, h);
    myfread32(&wp[i].own, h);
    myfread16(&wp[i].target, h);
  }
}

void WP_alloc(void) {
  int i;
  static char nm[14][6]={
	"PISTOL",
	"SHOTGN",
	"DSHTGN",
	"RLAUNC",
	"RXPLOD",
	"PLASMA",
	"FIRSHT",
	"FIRXPL",
	"BAREXP",
	"PUNCH",
	"SAWHIT",
	"MGUN",
	"SPARK1",
	"SPARK2"
  };

  for(i=0;i<4;++i) {
	spr[i*2]=Z_getspr("MISL",i,1,sprd+i*2);
	spr[i*2+1]=Z_getspr("MISL",i,2,sprd+i*2+1);
  }
  for(;i<6;++i) {
	spr[i*2]=Z_getspr("PLSS",i-4,1,sprd+i*2);
	spr[i*2+1]=Z_getspr("PLSS",i-4,2,sprd+i*2+1);
  }
  for(;i<11;++i) {
    spr[i*2]=Z_getspr("PLSE",i-6,1,sprd+i*2);
    spr[i*2+1]=Z_getspr("PLSE",i-6,2,sprd+i*2+1);
  }
  for(;i<13;++i) {
    spr[i*2]=Z_getspr("APLS",i-11,1,sprd+i*2);
    spr[i*2+1]=Z_getspr("APLS",i-11,2,sprd+i*2+1);
  }
  for(;i<18;++i) {
    spr[i*2]=Z_getspr("APBX",i-13,1,sprd+i*2);
    spr[i*2+1]=Z_getspr("APBX",i-13,2,sprd+i*2+1);
  }
  for(;i<20;++i) {
    spr[i*2]=Z_getspr("BFS1",i-18,1,sprd+i*2);
    spr[i*2+1]=Z_getspr("BFS1",i-18,2,sprd+i*2+1);
  }
  for(;i<26;++i) {
	spr[i*2]=Z_getspr("BFE1",i-20,1,sprd+i*2);
	spr[i*2+1]=Z_getspr("BFE1",i-20,2,sprd+i*2+1);
  }
  for(;i<30;++i) {
    spr[i*2]=Z_getspr("BFE2",i-26,1,sprd+i*2);
    spr[i*2+1]=Z_getspr("BFE2",i-26,2,sprd+i*2+1);
  }
  for(;i<32;++i) {
    spr[i*2]=Z_getspr("MISL",i-30+4,1,sprd+i*2);
    spr[i*2+1]=Z_getspr("MISL",i-30+4,2,sprd+i*2+1);
  }
  for(;i<37;++i) {
	spr[i*2]=Z_getspr("BAL1",i-32,1,sprd+i*2);
	spr[i*2+1]=Z_getspr("BAL1",i-32,2,sprd+i*2+1);
  }
  for(;i<42;++i) {
	spr[i*2]=Z_getspr("BAL7",i-37,1,sprd+i*2);
	spr[i*2+1]=Z_getspr("BAL7",i-37,2,sprd+i*2+1);
  }
  for(;i<47;++i) {
	spr[i*2]=Z_getspr("BAL2",i-42,1,sprd+i*2);
	spr[i*2+1]=Z_getspr("BAL2",i-42,2,sprd+i*2+1);
  }
  for(;i<49;++i) {
	spr[i*2]=Z_getspr("MANF",i-47,1,sprd+i*2);
	spr[i*2+1]=Z_getspr("MANF",i-47,2,sprd+i*2+1);
  }
  for(i=0;i<14;++i) snd[i]=Z_getsnd(nm[i]);
}

void WP_init(void) {
  int i;

  for(i=0;i<MAXWPN;++i) wp[i].t=NONE;
}

void WP_act(void) {
  int i,st;
  static obj_t o;

  for(i=0;i<MAXWPN;++i) if(wp[i].t) {
	if(wp[i].t==ROCKET || wp[i].t==REVF)
	  SMK_gas(wp[i].o.x+Z_sign(wp[i].o.xv)*2,
	    wp[i].o.y-wp[i].o.h/2,3,3,
	    wp[i].o.xv+wp[i].o.vx,wp[i].o.yv+wp[i].o.vy,64
	  );
	--wp[i].o.yv;st=Z_moveobj(&wp[i].o);
	if(st&Z_FALLOUT) {wp[i].t=0;continue;}
	if(st&Z_HITWATER) switch(wp[i].t) {
	  case PLASMA: case APLASMA:
	  case BFGBALL:
		break;
	  default:
		Z_splash(&wp[i].o,wp[i].o.r+wp[i].o.h);break;
	}
	switch(wp[i].t) {
	  case REVF:
		if(Z_getobjpos(wp[i].target,&o))
		  throw(i,wp[i].o.x,wp[i].o.y-2,o.x+o.xv+o.vx,o.y+o.yv+o.vy,2,5,12);
	  case ROCKET:
		if(wp[i].s>=2) {if(++wp[i].s>=8) wp[i].t=0; break;}
		if(st&Z_HITAIR) Z_set_speed(&wp[i].o,12);
		if(st&(Z_HITWALL|Z_HITCEIL|Z_HITLAND)) {
		  wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[4],128);
		  Z_explode(wp[i].o.x,wp[i].o.y,30,wp[i].own);break;}
		else if(Z_hit(&wp[i].o,10,wp[i].own,HIT_SOME)) {
		  wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[4],128);
		  Z_explode(wp[i].o.x,wp[i].o.y-wp[i].o.h/2,30,wp[i].own);break;}
		bfg_fly(wp[i].o.x,wp[i].o.y-wp[i].o.h/2,wp[i].own);
		break;
	  case PLASMA:
	  case APLASMA:
		if(st&Z_INWATER) {
		  Z_sound(snd[12],128);
		  Z_water_trap(&wp[i].o);
		  Z_chktrap(1,10,wp[i].own,HIT_ELECTRO);
		  Z_untrap(5);
		  wp[i].t=0;break;
		}
	  case BALL1:
	  case BALL7:
	  case BALL2:
	  case MANF:
		if(wp[i].s>=2)
		  {if(++wp[i].s>=((wp[i].t==BALL1 || wp[i].t==BALL7 || wp[i].t==BALL2 || wp[i].t==MANF)?8:12)) wp[i].t=0; break;}
		if(st&Z_HITAIR) Z_set_speed(&wp[i].o,16);
		if(st&(Z_HITWALL|Z_HITCEIL|Z_HITLAND))
		  {wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[7],128);break;}
		else if(Z_hit(&wp[i].o,(wp[i].t==BALL7 || wp[i].t==MANF)?40:((wp[i].t==BALL2)?20:5),wp[i].own,HIT_SOME))
		  {wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[7],128);break;}
		wp[i].s^=1;break;
	  case BFGBALL:
		if(st&Z_INWATER) {
		  Z_sound(snd[8],40);Z_sound(snd[13],128);
		  Z_water_trap(&wp[i].o);
		  Z_chktrap(1,1000,wp[i].own,HIT_ELECTRO);
		  Z_untrap(5);
		  wp[i].t=0;break;
		}
		if(wp[i].s>=2) {if(++wp[i].s>=14) wp[i].t=0; break;}
		else if(st&(Z_HITWALL|Z_HITCEIL|Z_HITLAND)) {
		  Z_bfg9000(wp[i].o.x,wp[i].o.y,wp[i].own);
		  wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[8],128);break;}
		else if(Z_hit(&wp[i].o,100,wp[i].own,HIT_BFG)) {
		  Z_bfg9000(wp[i].o.x,wp[i].o.y,wp[i].own);
		  wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[8],128);break;}
		bfg_fly(wp[i].o.x,wp[i].o.y-wp[i].o.h/2,wp[i].own);
		wp[i].s^=1;break;
	  case BFGHIT:
		if(++wp[i].s>=8) wp[i].t=0;
		break;
	  default: break;
	}
  }
}

void WP_draw(void) {
  int i,s,d,x,y;

  for(i=0;i<MAXWPN;++i) {
    s=-1;d=0;
    switch(wp[i].t) {
      case NONE: default: break;
      case REVF:
      case ROCKET:
		if((d=wp[i].s)<2) {
		  d=(wp[i].o.xv>0)?1:0;
		  x=abs(wp[i].o.xv);y=wp[i].o.yv;s=0;
		  if(y<0) {if(-y>=x) s=30;}
		  else if(y>0) if(y>=x/2) s=31;
		}else {s=(d-2)/2+1;d=0;}
		break;
	  case MANF:
	    if((s=wp[i].s)>=2) {s/=2;break;}
	  case PLASMA:
	  case APLASMA:
	  case BALL1:
	  case BALL7:
	  case BALL2:
		if((s=wp[i].s)>=2) s=s/2+1;
		switch(wp[i].t) {
		  case PLASMA: s+=4;break;
		  case APLASMA: s+=11;break;
		  case BALL1: s+=32;break;
		  case BALL2: s+=42;break;
		  case BALL7: s+=37;d=(wp[i].o.xv>=0)?1:0;break;
		  case MANF: s+=47;d=(wp[i].o.xv>=0)?1:0;break;
		}break;
	  case BFGBALL:
		if((s=wp[i].s)>=2) s=s/2+1;
		s+=18;break;
	  case BFGHIT:
		s=wp[i].s/2+26;break;
    }
    if(s>=0) Z_drawspr(wp[i].o.x,wp[i].o.y,spr[s*2+d],sprd[s*2+d]);
  }
}

void WP_gun(int x,int y,int xd,int yd,int o,int v) {
  register dword d,m;
  int sx,sy,lx,ly;
  dword xe,ye,s;
  byte f;

  f=BM_MONSTER|BM_WALL;
  if(o!=-1) f|=BM_PLR1;
  if(o!=-2) f|=BM_PLR2;
  if((xd-=x)>0) sx=1;
  else if(xd<0) sx=-1;
  else sx=0;
  if((yd-=y)>0) sy=1;
  else if(yd<0) sy=-1;
  else sy=0;
  if(!xd && !yd) return;
  if((xd=abs(xd)) > (yd=abs(yd))) d=xd; else d=yd;
  hit_xv=xd*10/d*sx;
  hit_yv=yd*10/d*sy;
  xe=ye=0;
  lx=x;ly=y;
  for(;;) {
	if(x<0 || x>=FLDW*8 || y<0 || y>=FLDH*8) break;
	if(((m=bmap[y>>5][x>>5])&f)) {
	  if(m&BM_WALL) if(fld[y>>3][x>>3]==1 || fld[y>>3][x>>3]==2) {
		for(x=lx,y=ly,xe=ye=0;fld[y>>3][x>>3]!=1 && fld[y>>3][x>>3]!=2;) {
		  lx=x;ly=y;
		  if((xe+=xd)>=d) {xe-=d;x+=sx;}
		  if((ye+=yd)>=d) {ye-=d;y+=sy;}
		}
		DOT_spark(lx,ly,sx*10,sy*10,1);
		break;
	  }
	  if(m&(BM_MONSTER|BM_PLR1|BM_PLR2)) if(Z_gunhit(x,y,o,sx*v,sy*v)) break;
	  lx=x;ly=y;
	  if((xe+=(xd<<3))>=d) {
		x+=xe/d*sx;xe=xe%d;
	  }
	  if((ye+=(yd<<3))>=d) {
		y+=ye/d*sy;ye=ye%d;
	  }
	}else{
	  if(sx==0) m=0;
	  else{m=x&31;if(sx>0) m^=31; ++m;}
	  if(sy==0) s=0;
	  else{s=y&31;if(sy>0) s^=31; ++s;}
	  if((s<m && s!=0) || m==0) m=s;
	  lx=x;ly=y;
		x+=(xd*m+xe)/d*sx;xe=(xd*m+xe)%d;
		y+=(yd*m+ye)/d*sy;ye=(yd*m+ye)%d;
	}
  }
}

void WP_punch(int x,int y,int d,int own) {
  obj_t o;

  o.x=x;o.y=y;o.r=12;o.h=26;
  o.xv=o.yv=o.vx=o.vy=0;
  if(Z_hit(&o,d,own,HIT_SOME)) Z_sound(snd[9],128);
}

int WP_chainsaw(int x,int y,int d,int own) {
  obj_t o;

  o.x=x;o.y=y;o.r=12;o.h=26;
  o.xv=o.yv=o.vx=o.vy=0;
  if(Z_hit(&o,d,own,HIT_SOME)) return 1;
  return 0;
}

static void throw(int i,int x,int y,int xd,int yd,int r,int h,int s) {
  int m;

  wp[i].o.x=x;wp[i].o.y=y+h/2;
  yd-=y;xd-=x;
  if(!(m=max(abs(xd),abs(yd)))) m=1;
  wp[i].o.xv=xd*s/m;wp[i].o.yv=yd*s/m;
  wp[i].o.r=r;wp[i].o.h=h;
  wp[i].o.vx=wp[i].o.vy=0;
}

void WP_rocket(int x,int y,int xd,int yd,int o) {
  int i;

  for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
    Z_sound(snd[3],128);
    wp[i].t=ROCKET;wp[i].s=(xd>=x)?1:0;
	wp[i].own=o;
	throw(i,x,y,xd,yd,2,5,12);
	return;
  }
}

void WP_revf(int x,int y,int xd,int yd,int o,int t) {
  int i;

  for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
    Z_sound(snd[3],128);
    wp[i].t=REVF;wp[i].s=(xd>=x)?1:0;
	wp[i].own=o;wp[i].target=t;
	throw(i,x,y,xd,yd,2,5,12);
	return;
  }
}

void WP_plasma(int x,int y,int xd,int yd,int o) {
  int i;

  for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
    Z_sound(snd[5],64);
    wp[i].t=PLASMA;wp[i].s=0;
	wp[i].own=o;
	throw(i,x,y,xd,yd,2,5,16);
    return;
  }
}

void WP_ball1(int x,int y,int xd,int yd,int o) {
  int i;

  for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
	wp[i].t=BALL1;wp[i].s=0;
	wp[i].own=o;
	throw(i,x,y,xd,yd,2,5,16);
	return;
  }
}

void WP_ball2(int x,int y,int xd,int yd,int o) {
  int i;

  for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
	wp[i].t=BALL2;wp[i].s=0;
	wp[i].own=o;
	throw(i,x,y,xd,yd,2,5,16);
	return;
  }
}

void WP_ball7(int x,int y,int xd,int yd,int o) {
  int i;

  for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
	wp[i].t=BALL7;wp[i].s=0;
	wp[i].own=o;
	throw(i,x,y,xd,yd,2,5,16);
	return;
  }
}

void WP_aplasma(int x,int y,int xd,int yd,int o) {
  int i;

  for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
	Z_sound(snd[5],64);
	wp[i].t=APLASMA;wp[i].s=0;
	wp[i].own=o;
	throw(i,x,y,xd,yd,2,5,16);
	return;
  }
}

void WP_manfire(int x,int y,int xd,int yd,int o) {
  int i;

  for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
	Z_sound(snd[6],128);
	wp[i].t=MANF;wp[i].s=0;
	wp[i].own=o;
	throw(i,x,y,xd,yd,5,11,16);
	return;
  }
}

void WP_bfgshot(int x,int y,int xd,int yd,int o) {
  int i;

  for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
    wp[i].t=BFGBALL;wp[i].s=0;
	wp[i].own=o;
	throw(i,x,y,xd,yd,5,12,16);
	return;
  }
}

void WP_bfghit(int x,int y,int o) {
  int i;

  for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
    wp[i].t=BFGHIT;wp[i].s=0;
    wp[i].o.x=x;wp[i].o.y=y;
    wp[i].o.xv=wp[i].o.yv=0;
    wp[i].o.r=0;wp[i].o.h=1;
    wp[i].o.vx=wp[i].o.vy=0;
    wp[i].own=o;
    return;
  }
}

void WP_pistol(int x,int y,int xd,int yd,int o) {
  Z_sound(snd[0],96);
  WP_gun(x,y,xd,yd,o,1);
  if(g_dm) {
    WP_gun(x,y+1,xd,yd+1,o,1);
    WP_gun(x,y-1,xd,yd-1,o,1);
  }
}

void WP_mgun(int x,int y,int xd,int yd,int o) {
  Z_sound(snd[11],128);
  WP_gun(x,y,xd,yd,o,1);
}

void WP_shotgun(int x,int y,int xd,int yd,int o) {
  int i,j;

  Z_sound(snd[1],128);
  for(i=0;i<10;++i) {
    j=myrand(4*2+1)-4;
    WP_gun(x,y+j,xd,yd+j,o,i&1);
  }
}

void WP_dshotgun(int x,int y,int xd,int yd,int o) {
  int i,j;

  Z_sound(snd[2],128);
  for(i=(g_dm)?25:20;i>=0;--i) {
    j=myrand(10*2+1)-10;
    WP_gun(x,y+j,xd,yd+j,o,(i%3)?0:1);
  }
}

void WP_ognemet(int x,int y,int xd,int yd,int xv,int yv,int o) {
  int m;

  m=abs(xd-x);if(!m) m=abs(yd-y);
  SMK_flame(x,y,xv,yv,2,2,(xd-x)*3000/m,(yd-y)*3000/m,1,o);
}