//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005-2014 Simon Howard
//
// 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.
//
// DESCRIPTION: Door animation code (opening/closing)
//



#include "z_zone.h"
#include "doomdef.h"
#include "deh_main.h"
#include "p_local.h"
#include "i_system.h"

#include "s_sound.h"


// State.
#include "doomstat.h"
#include "r_state.h"

// Data.
#include "dstrings.h"
#include "sounds.h"

#if 0
//
// Sliding door frame information
//
slidename_t	slideFrameNames[MAXSLIDEDOORS] =
{
    {"GDOORF1","GDOORF2","GDOORF3","GDOORF4",	// front
     "GDOORB1","GDOORB2","GDOORB3","GDOORB4"},	// back
	 
    {"\0","\0","\0","\0"}
};
#endif


//
// VERTICAL DOORS
//

//
// T_VerticalDoor
//
void T_VerticalDoor (vldoor_t* door)
{
    result_e	res;
	
    switch(door->direction)
    {
      case 0:
	// WAITING
	if (!--door->topcountdown)
	{
	    switch(door->type)
	    {
	      case vld_blazeRaise:
		door->direction = -1; // time to go back down
		S_StartSound(&door->sector->soundorg, sfx_bdcls);
		break;
		
	      case vld_normal:
		door->direction = -1; // time to go back down
		S_StartSound(&door->sector->soundorg, sfx_dorcls);
		break;
		
	      case vld_close30ThenOpen:
		door->direction = 1;
		S_StartSound(&door->sector->soundorg, sfx_doropn);
		break;
		
	      default:
		break;
	    }
	}
	break;
	
      case 2:
	//  INITIAL WAIT
	if (!--door->topcountdown)
	{
	    switch(door->type)
	    {
	      case vld_raiseIn5Mins:
		door->direction = 1;
		door->type = vld_normal;
		S_StartSound(&door->sector->soundorg, sfx_doropn);
		break;
		
	      default:
		break;
	    }
	}
	break;
	
      case -1:
	// DOWN
	res = T_MovePlane(door->sector,
			  door->speed,
			  door->sector->floorheight,
			  false,1,door->direction);
	if (res == pastdest)
	{
	    switch(door->type)
	    {
	      case vld_blazeRaise:
	      case vld_blazeClose:
		door->sector->specialdata = NULL;
		P_RemoveThinker (&door->thinker);  // unlink and free
		S_StartSound(&door->sector->soundorg, sfx_bdcls);
		break;
		
	      case vld_normal:
	      case vld_close:
		door->sector->specialdata = NULL;
		P_RemoveThinker (&door->thinker);  // unlink and free
		break;
		
	      case vld_close30ThenOpen:
		door->direction = 0;
		door->topcountdown = TICRATE*30;
		break;
		
	      default:
		break;
	    }
	}
	else if (res == crushed)
	{
	    switch(door->type)
	    {
	      case vld_blazeClose:
	      case vld_close:		// DO NOT GO BACK UP!
		break;
		
	      default:
		door->direction = 1;
		S_StartSound(&door->sector->soundorg, sfx_doropn);
		break;
	    }
	}
	break;
	
      case 1:
	// UP
	res = T_MovePlane(door->sector,
			  door->speed,
			  door->topheight,
			  false,1,door->direction);
	
	if (res == pastdest)
	{
	    switch(door->type)
	    {
	      case vld_blazeRaise:
	      case vld_normal:
		door->direction = 0; // wait at top
		door->topcountdown = door->topwait;
		break;
		
	      case vld_close30ThenOpen:
	      case vld_blazeOpen:
	      case vld_open:
		door->sector->specialdata = NULL;
		P_RemoveThinker (&door->thinker);  // unlink and free
		break;
		
	      default:
		break;
	    }
	}
	break;
    }
}


//
// EV_DoLockedDoor
// Move a locked door up/down
//

int
EV_DoLockedDoor
( line_t*	line,
  vldoor_e	type,
  mobj_t*	thing )
{
    player_t*	p;
	
    p = thing->player;
	
    if (!p)
	return 0;
		
    switch(line->special)
    {
      case 99:	// Blue Lock
      case 133:
	if (!p->cards[it_bluecard] && !p->cards[it_blueskull])
	{
	    p->message = DEH_String(PD_BLUEO);
	    S_StartSound(NULL,sfx_oof);
	    return 0;
	}
	break;
	
      case 134: // Red Lock
      case 135:
	if (!p->cards[it_redcard] && !p->cards[it_redskull])
	{
	    p->message = DEH_String(PD_REDO);
	    S_StartSound(NULL,sfx_oof);
	    return 0;
	}
	break;
	
      case 136:	// Yellow Lock
      case 137:
	if (!p->cards[it_yellowcard] &&
	    !p->cards[it_yellowskull])
	{
	    p->message = DEH_String(PD_YELLOWO);
	    S_StartSound(NULL,sfx_oof);
	    return 0;
	}
	break;	
    }

    return EV_DoDoor(line,type);
}


int
EV_DoDoor
( line_t*	line,
  vldoor_e	type )
{
    int		secnum,rtn;
    sector_t*	sec;
    vldoor_t*	door;
	
    secnum = -1;
    rtn = 0;
    
    while ((secnum = P_FindSectorFromLineTag(line,secnum)) >= 0)
    {
	sec = &sectors[secnum];
	if (sec->specialdata)
	    continue;
		
	
	// new door thinker
	rtn = 1;
	door = Z_Malloc (sizeof(*door), PU_LEVSPEC, 0);
	P_AddThinker (&door->thinker);
	sec->specialdata = door;

	door->thinker.function.acp1 = (actionf_p1) T_VerticalDoor;
	door->sector = sec;
	door->type = type;
	door->topwait = VDOORWAIT;
	door->speed = VDOORSPEED;
		
	switch(type)
	{
	  case vld_blazeClose:
	    door->topheight = P_FindLowestCeilingSurrounding(sec);
	    door->topheight -= 4*FRACUNIT;
	    door->direction = -1;
	    door->speed = VDOORSPEED * 4;
	    S_StartSound(&door->sector->soundorg, sfx_bdcls);
	    break;
	    
	  case vld_close:
	    door->topheight = P_FindLowestCeilingSurrounding(sec);
	    door->topheight -= 4*FRACUNIT;
	    door->direction = -1;
	    S_StartSound(&door->sector->soundorg, sfx_dorcls);
	    break;
	    
	  case vld_close30ThenOpen:
	    door->topheight = sec->ceilingheight;
	    door->direction = -1;
	    S_StartSound(&door->sector->soundorg, sfx_dorcls);
	    break;
	    
	  case vld_blazeRaise:
	  case vld_blazeOpen:
	    door->direction = 1;
	    door->topheight = P_FindLowestCeilingSurrounding(sec);
	    door->topheight -= 4*FRACUNIT;
	    door->speed = VDOORSPEED * 4;
	    if (door->topheight != sec->ceilingheight)
		S_StartSound(&door->sector->soundorg, sfx_bdopn);
	    break;
	    
	  case vld_normal:
	  case vld_open:
	    door->direction = 1;
	    door->topheight = P_FindLowestCeilingSurrounding(sec);
	    door->topheight -= 4*FRACUNIT;
	    if (door->topheight != sec->ceilingheight)
		S_StartSound(&door->sector->soundorg, sfx_doropn);
	    break;
	    
	  default:
	    break;
	}
		
    }
    return rtn;
}


//
// EV_VerticalDoor : open a door manually, no tag value
//
void
EV_VerticalDoor
( line_t*	line,
  mobj_t*	thing )
{
    player_t*	player;
    sector_t*	sec;
    vldoor_t*	door;
    int		side;
	
    side = 0;	// only front sides can be used

    //	Check for locks
    player = thing->player;
		
    switch(line->special)
    {
      case 26: // Blue Lock
      case 32:
	if ( !player )
	    return;
	
	if (!player->cards[it_bluecard] && !player->cards[it_blueskull])
	{
	    player->message = DEH_String(PD_BLUEK);
	    S_StartSound(NULL,sfx_oof);
	    return;
	}
	break;
	
      case 27: // Yellow Lock
      case 34:
	if ( !player )
	    return;
	
	if (!player->cards[it_yellowcard] &&
	    !player->cards[it_yellowskull])
	{
	    player->message = DEH_String(PD_YELLOWK);
	    S_StartSound(NULL,sfx_oof);
	    return;
	}
	break;
	
      case 28: // Red Lock
      case 33:
	if ( !player )
	    return;
	
	if (!player->cards[it_redcard] && !player->cards[it_redskull])
	{
	    player->message = DEH_String(PD_REDK);
	    S_StartSound(NULL,sfx_oof);
	    return;
	}
	break;
    }
	
    // if the sector has an active thinker, use it

    if (line->sidenum[side^1] == -1)
    {
        I_Error("EV_VerticalDoor: DR special type on 1-sided linedef");
    }

    sec = sides[ line->sidenum[side^1]] .sector;

    if (sec->specialdata)
    {
	door = sec->specialdata;
	switch(line->special)
	{
	  case	1: // ONLY FOR "RAISE" DOORS, NOT "OPEN"s
	  case	26:
	  case	27:
	  case	28:
	  case	117:
	    if (door->direction == -1)
		door->direction = 1;	// go back up
	    else
	    {
		if (!thing->player)
		    return;		// JDC: bad guys never close doors

                // When is a door not a door?
                // In Vanilla, door->direction is set, even though
                // "specialdata" might not actually point at a door.

                if (door->thinker.function.acp1 == (actionf_p1) T_VerticalDoor)
                {
                    door->direction = -1;	// start going down immediately
                }
                else if (door->thinker.function.acp1 == (actionf_p1) T_PlatRaise)
                {
                    // Erm, this is a plat, not a door.
                    // This notably causes a problem in ep1-0500.lmp where
                    // a plat and a door are cross-referenced; the door
                    // doesn't open on 64-bit.
                    // The direction field in vldoor_t corresponds to the wait
                    // field in plat_t.  Let's set that to -1 instead.

                    plat_t *plat;

                    plat = (plat_t *) door;
                    plat->wait = -1;
                }
                else
                {
                    // This isn't a door OR a plat.  Now we're in trouble.

                    fprintf(stderr, "EV_VerticalDoor: Tried to close "
                                    "something that wasn't a door.\n");

                    // Try closing it anyway. At least it will work on 32-bit
                    // machines.

                    door->direction = -1;
                }
	    }
	    return;
	}
    }
	
    // for proper sound
    switch(line->special)
    {
      case 117:	// BLAZING DOOR RAISE
      case 118:	// BLAZING DOOR OPEN
	S_StartSound(&sec->soundorg,sfx_bdopn);
	break;
	
      case 1:	// NORMAL DOOR SOUND
      case 31:
	S_StartSound(&sec->soundorg,sfx_doropn);
	break;
	
      default:	// LOCKED DOOR SOUND
	S_StartSound(&sec->soundorg,sfx_doropn);
	break;
    }
	
    
    // new door thinker
    door = Z_Malloc (sizeof(*door), PU_LEVSPEC, 0);
    P_AddThinker (&door->thinker);
    sec->specialdata = door;
    door->thinker.function.acp1 = (actionf_p1) T_VerticalDoor;
    door->sector = sec;
    door->direction = 1;
    door->speed = VDOORSPEED;
    door->topwait = VDOORWAIT;

    switch(line->special)
    {
      case 1:
      case 26:
      case 27:
      case 28:
	door->type = vld_normal;
	break;
	
      case 31:
      case 32:
      case 33:
      case 34:
	door->type = vld_open;
	line->special = 0;
	break;
	
      case 117:	// blazing door raise
	door->type = vld_blazeRaise;
	door->speed = VDOORSPEED*4;
	break;
      case 118:	// blazing door open
	door->type = vld_blazeOpen;
	line->special = 0;
	door->speed = VDOORSPEED*4;
	break;
    }
    
    // find the top and bottom of the movement range
    door->topheight = P_FindLowestCeilingSurrounding(sec);
    door->topheight -= 4*FRACUNIT;
}


//
// Spawn a door that closes after 30 seconds
//
void P_SpawnDoorCloseIn30 (sector_t* sec)
{
    vldoor_t*	door;
	
    door = Z_Malloc ( sizeof(*door), PU_LEVSPEC, 0);

    P_AddThinker (&door->thinker);

    sec->specialdata = door;
    sec->special = 0;

    door->thinker.function.acp1 = (actionf_p1)T_VerticalDoor;
    door->sector = sec;
    door->direction = 0;
    door->type = vld_normal;
    door->speed = VDOORSPEED;
    door->topcountdown = 30 * TICRATE;
}

//
// Spawn a door that opens after 5 minutes
//
void
P_SpawnDoorRaiseIn5Mins
( sector_t*	sec,
  int		secnum )
{
    vldoor_t*	door;
	
    door = Z_Malloc ( sizeof(*door), PU_LEVSPEC, 0);
    
    P_AddThinker (&door->thinker);

    sec->specialdata = door;
    sec->special = 0;

    door->thinker.function.acp1 = (actionf_p1)T_VerticalDoor;
    door->sector = sec;
    door->direction = 2;
    door->type = vld_raiseIn5Mins;
    door->speed = VDOORSPEED;
    door->topheight = P_FindLowestCeilingSurrounding(sec);
    door->topheight -= 4*FRACUNIT;
    door->topwait = VDOORWAIT;
    door->topcountdown = 5 * 60 * TICRATE;
}



// UNUSED
// Separate into p_slidoor.c?

#if 0		// ABANDONED TO THE MISTS OF TIME!!!
//
// EV_SlidingDoor : slide a door horizontally
// (animate midtexture, then set noblocking line)
//


slideframe_t slideFrames[MAXSLIDEDOORS];

void P_InitSlidingDoorFrames(void)
{
    int		i;
    int		f1;
    int		f2;
    int		f3;
    int		f4;
	
    // DOOM II ONLY...
    if ( gamemode != commercial)
	return;
	
    for (i = 0;i < MAXSLIDEDOORS; i++)
    {
	if (!slideFrameNames[i].frontFrame1[0])
	    break;
			
	f1 = R_TextureNumForName(slideFrameNames[i].frontFrame1);
	f2 = R_TextureNumForName(slideFrameNames[i].frontFrame2);
	f3 = R_TextureNumForName(slideFrameNames[i].frontFrame3);
	f4 = R_TextureNumForName(slideFrameNames[i].frontFrame4);

	slideFrames[i].frontFrames[0] = f1;
	slideFrames[i].frontFrames[1] = f2;
	slideFrames[i].frontFrames[2] = f3;
	slideFrames[i].frontFrames[3] = f4;
		
	f1 = R_TextureNumForName(slideFrameNames[i].backFrame1);
	f2 = R_TextureNumForName(slideFrameNames[i].backFrame2);
	f3 = R_TextureNumForName(slideFrameNames[i].backFrame3);
	f4 = R_TextureNumForName(slideFrameNames[i].backFrame4);

	slideFrames[i].backFrames[0] = f1;
	slideFrames[i].backFrames[1] = f2;
	slideFrames[i].backFrames[2] = f3;
	slideFrames[i].backFrames[3] = f4;
    }
}


//
// Return index into "slideFrames" array
// for which door type to use
//
int P_FindSlidingDoorType(line_t*	line)
{
    int		i;
    int		val;
	
    for (i = 0;i < MAXSLIDEDOORS;i++)
    {
	val = sides[line->sidenum[0]].midtexture;
	if (val == slideFrames[i].frontFrames[0])
	    return i;
    }
	
    return -1;
}

void T_SlidingDoor (slidedoor_t*	door)
{
    switch(door->status)
    {
      case sd_opening:
	if (!door->timer--)
	{
	    if (++door->frame == SNUMFRAMES)
	    {
		// IF DOOR IS DONE OPENING...
		sides[door->line->sidenum[0]].midtexture = 0;
		sides[door->line->sidenum[1]].midtexture = 0;
		door->line->flags &= ML_BLOCKING^0xff;
					
		if (door->type == sdt_openOnly)
		{
		    door->frontsector->specialdata = NULL;
		    P_RemoveThinker (&door->thinker);
		    break;
		}
					
		door->timer = SDOORWAIT;
		door->status = sd_waiting;
	    }
	    else
	    {
		// IF DOOR NEEDS TO ANIMATE TO NEXT FRAME...
		door->timer = SWAITTICS;
					
		sides[door->line->sidenum[0]].midtexture =
		    slideFrames[door->whichDoorIndex].
		    frontFrames[door->frame];
		sides[door->line->sidenum[1]].midtexture =
		    slideFrames[door->whichDoorIndex].
		    backFrames[door->frame];
	    }
	}
	break;
			
      case sd_waiting:
	// IF DOOR IS DONE WAITING...
	if (!door->timer--)
	{
	    // CAN DOOR CLOSE?
	    if (door->frontsector->thinglist != NULL ||
		door->backsector->thinglist != NULL)
	    {
		door->timer = SDOORWAIT;
		break;
	    }

	    //door->frame = SNUMFRAMES-1;
	    door->status = sd_closing;
	    door->timer = SWAITTICS;
	}
	break;
			
      case sd_closing:
	if (!door->timer--)
	{
	    if (--door->frame < 0)
	    {
		// IF DOOR IS DONE CLOSING...
		door->line->flags |= ML_BLOCKING;
		door->frontsector->specialdata = NULL;
		P_RemoveThinker (&door->thinker);
		break;
	    }
	    else
	    {
		// IF DOOR NEEDS TO ANIMATE TO NEXT FRAME...
		door->timer = SWAITTICS;
					
		sides[door->line->sidenum[0]].midtexture =
		    slideFrames[door->whichDoorIndex].
		    frontFrames[door->frame];
		sides[door->line->sidenum[1]].midtexture =
		    slideFrames[door->whichDoorIndex].
		    backFrames[door->frame];
	    }
	}
	break;
    }
}



void
EV_SlidingDoor
( line_t*	line,
  mobj_t*	thing )
{
    sector_t*		sec;
    slidedoor_t*	door;
	
    // DOOM II ONLY...
    if (gamemode != commercial)
	return;
    
    // Make sure door isn't already being animated
    sec = line->frontsector;
    door = NULL;
    if (sec->specialdata)
    {
	if (!thing->player)
	    return;
			
	door = sec->specialdata;
	if (door->type == sdt_openAndClose)
	{
	    if (door->status == sd_waiting)
		door->status = sd_closing;
	}
	else
	    return;
    }
    
    // Init sliding door vars
    if (!door)
    {
	door = Z_Malloc (sizeof(*door), PU_LEVSPEC, 0);
	P_AddThinker (&door->thinker);
	sec->specialdata = door;
		
	door->type = sdt_openAndClose;
	door->status = sd_opening;
	door->whichDoorIndex = P_FindSlidingDoorType(line);

	if (door->whichDoorIndex < 0)
	    I_Error("EV_SlidingDoor: Can't use texture for sliding door!");
			
	door->frontsector = sec;
	door->backsector = line->backsector;
	door->thinker.function = T_SlidingDoor;
	door->timer = SWAITTICS;
	door->frame = 0;
	door->line = line;
    }
}
#endif
