// Copyright (C) 1999-2000 Id Software, Inc.
//
// g_combat.c

/*
 *  Portions Copyright (C) 2000-2001 Tim Angus
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the OSML - Open Source Modification License v1.0 as
 *  described in the file COPYING which is distributed with this source
 *  code.
 *
 *  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.
 */

#include "g_local.h"

damageRegion_t  g_damageRegions[ PCL_NUM_CLASSES ][ MAX_LOCDAMAGE_REGIONS ];
int             g_numDamageRegions[ PCL_NUM_CLASSES ];

armourRegion_t  g_armourRegions[ UP_NUM_UPGRADES ][ MAX_ARMOUR_REGIONS ];
int             g_numArmourRegions[ UP_NUM_UPGRADES ];

/*
============
AddScore

Adds score to both the client and his team
============
*/
void AddScore( gentity_t *ent, int score )
{
  if( !ent->client )
    return;

  // no scoring during pre-match warmup
  if( level.warmupTime )
    return;

  ent->client->ps.persistant[ PERS_SCORE ] += score;
  CalculateRanks( );
}

/*
==================
LookAtKiller
==================
*/
void LookAtKiller( gentity_t *self, gentity_t *inflictor, gentity_t *attacker )
{
  vec3_t    dir;
  vec3_t    angles;

  if ( attacker && attacker != self )
    VectorSubtract( attacker->s.pos.trBase, self->s.pos.trBase, dir );
  else if( inflictor && inflictor != self )
    VectorSubtract( inflictor->s.pos.trBase, self->s.pos.trBase, dir );
  else
  {
    self->client->ps.generic1 = self->s.angles[ YAW ];
    return;
  }

  self->client->ps.generic1 = vectoyaw( dir );

  angles[ YAW ] = vectoyaw( dir );
  angles[ PITCH ] = 0;
  angles[ ROLL ] = 0;
}

/*
==================
body_die
==================
*/
void body_die( gentity_t *self, gentity_t *inflictor, gentity_t *attacker, int damage, int meansOfDeath )
{
  if( self->health > GIB_HEALTH )
    return;
  
  if( !g_blood.integer )
  {
    self->health = GIB_HEALTH + 1;
    return;
  }
}


// these are just for logging, the client prints its own messages
char *modNames[ ] =
{
  "MOD_UNKNOWN",
  "MOD_SHOTGUN",
  "MOD_BLASTER",
  "MOD_PAINSAW",
  "MOD_MACHINEGUN",
  "MOD_CHAINGUN",
  "MOD_PRIFLE",
  "MOD_MDRIVER",
  "MOD_LASGUN",
  "MOD_LCANNON",
  "MOD_LCANNON_SPLASH",
  "MOD_FLAMER",
  "MOD_FLAMER_SPLASH",
  "MOD_WATER",
  "MOD_SLIME",
  "MOD_LAVA",
  "MOD_CRUSH",
  "MOD_TELEFRAG",
  "MOD_FALLING",
  "MOD_SUICIDE",
  "MOD_TARGET_LASER",
  "MOD_TRIGGER_HURT",

  "MOD_ABUILDER_CLAW",
  "MOD_SOLDIER_BITE",
  "MOD_HYDRA_CLAW",
  "MOD_HYDRA_PCLOUD",
  "MOD_DRAGOON_CLAW",
  "MOD_DRAGOON_POUNCE",
  "MOD_DRAGOON_BOUNCEBALL",
  "MOD_CHIMERA_CLAW",
  "MOD_CHIMERA_ZAP",
  "MOD_BMOFO_CLAW",
  "MOD_BMOFO_CHARGE",

  "MOD_SLOWBLOB",
  "MOD_POISON",
  "MOD_SWARM",

  "MOD_HSPAWN",
  "MOD_TESLAGEN",
  "MOD_MGTURRET",
  "MOD_REACTOR",

  "MOD_ASPAWN",
  "MOD_ATUBE",
  "MOD_OVERMIND"
};

/*
==================
player_die
==================
*/
void player_die( gentity_t *self, gentity_t *inflictor, gentity_t *attacker, int damage, int meansOfDeath )
{
  gentity_t *ent;
  int     anim;
  int     contents;
  int     killer;
  int     i;
  char    *killerName, *obit;

  if( self->client->ps.pm_type == PM_DEAD )
    return;

  if( level.intermissiontime )
    return;

  self->client->ps.pm_type = PM_DEAD;

  if( attacker )
  {
    killer = attacker->s.number;
    
    if( attacker->client )
      killerName = attacker->client->pers.netname;
    else
      killerName = "<non-client>";
  }
  else
  {
    killer = ENTITYNUM_WORLD;
    killerName = "<world>";
  }

  if( killer < 0 || killer >= MAX_CLIENTS )
  {
    killer = ENTITYNUM_WORLD;
    killerName = "<world>";
  }

  if( meansOfDeath < 0 || meansOfDeath >= sizeof( modNames ) / sizeof( modNames[0] ) )
    obit = "<bad obituary>";
  else
    obit = modNames[ meansOfDeath ];

  G_LogPrintf("Kill: %i %i %i: %s killed %s by %s\n",
    killer, self->s.number, meansOfDeath, killerName,
    self->client->pers.netname, obit );

  //TA: close any menus the client has open
  G_CloseMenus( self->client->ps.clientNum );

  //TA: deactivate all upgrades
  for( i = UP_NONE + 1; i < UP_NUM_UPGRADES; i++ )
    BG_deactivateItem( i, self->client->ps.stats );

  // broadcast the death event to everyone
  ent = G_TempEntity( self->r.currentOrigin, EV_OBITUARY );
  ent->s.eventParm = meansOfDeath;
  ent->s.otherEntityNum = self->s.number;
  ent->s.otherEntityNum2 = killer;
  ent->r.svFlags = SVF_BROADCAST; // send to everyone

  self->enemy = attacker;

  self->client->ps.persistant[ PERS_KILLED ]++;

  if( attacker && attacker->client )
  {
    attacker->client->lastkilled_client = self->s.number;
    
    if( attacker == self || OnSameTeam( self, attacker ) )
    {
      AddScore( attacker, -1 );
           
      //punish team kills and suicides
      if( attacker->client->ps.stats[ STAT_PTEAM ] == PTE_ALIENS )
        attacker->client->ps.persistant[ PERS_CREDIT ]--;
      else if( attacker->client->ps.stats[ STAT_PTEAM ] == PTE_HUMANS )
        attacker->client->ps.persistant[ PERS_CREDIT ] -= ASPAWN_VALUE;

      if( attacker->client->ps.persistant[ PERS_CREDIT ] < 0 )
        attacker->client->ps.persistant[ PERS_CREDIT ] = 0;
    }
    else
    {
      AddScore( attacker, 1 );

      attacker->client->lastKillTime = level.time;
      
      if( attacker->client->ps.stats[ STAT_PTEAM ] == PTE_ALIENS )
        trap_Cvar_Set( "g_alienKills", va( "%d", g_alienKills.integer + 1 ) );
      else if( attacker->client->ps.stats[ STAT_PTEAM ] == PTE_HUMANS )
        trap_Cvar_Set( "g_humanKills", va( "%d", g_humanKills.integer + 1 ) );
      
    }
  }
  else if( attacker->s.eType != ET_BUILDABLE )
    AddScore( self, -1 );

  if( attacker && attacker->client &&
      attacker->client->ps.stats[ STAT_PTEAM ] == PTE_HUMANS &&
      self->client->ps.stats[ STAT_PTEAM ] == PTE_ALIENS )
  {
    int       clientNum = attacker->client->ps.clientNum;
    float     denominator, numerator = self->credits[ clientNum ];
    int       classValue = BG_FindValueOfClass( self->client->ps.stats[ STAT_PCLASS ] );
    int       total = 0;
    gentity_t *player;
    
    //total up all the damage done by every client
    for( i = 0; i < MAX_CLIENTS; i++ )
      total += self->credits[ i ];
    
    denominator = total;
    
    for( i = 0; i < MAX_CLIENTS; i++ )
    {
      player = g_entities + i;

      if( player->client && player->client->ps.stats[ STAT_PTEAM ] == PTE_HUMANS )
      {
        numerator = self->credits[ i ];
        
        //add credit
        player->client->ps.persistant[ PERS_CREDIT ] += (int)( (float)classValue * ( numerator / denominator ) );

        if( player->client->ps.persistant[ PERS_CREDIT ] > HUMAN_MAX_CREDITS )
          player->client->ps.persistant[ PERS_CREDIT ] = HUMAN_MAX_CREDITS;
      }
    }
  }
  else if( attacker && attacker->client &&
           attacker->client->ps.stats[ STAT_PTEAM ] == PTE_ALIENS &&
           self->client->ps.stats[ STAT_PTEAM ] == PTE_HUMANS )
  {
    attacker->client->ps.persistant[ PERS_CREDIT ]++;
    
    if( attacker->client->ps.persistant[ PERS_CREDIT ] > ALIEN_MAX_KILLS )
      attacker->client->ps.persistant[ PERS_CREDIT ] = ALIEN_MAX_KILLS;
  }
      
  // Add team bonuses
  //Team_FragBonuses(self, inflictor, attacker);

  Cmd_Score_f( self );    // show scores
  
  // send updated scores to any clients that are following this one,
  // or they would get stale scoreboards
  for( i = 0 ; i < level.maxclients ; i++ )
  {
    gclient_t *client;

    client = &level.clients[ i ];
    if( client->pers.connected != CON_CONNECTED )
      continue;
    
    if( client->sess.sessionTeam != TEAM_SPECTATOR )
      continue;
    
    if( client->sess.spectatorClient == self->s.number )
      Cmd_Score_f( g_entities + i );
  }

  self->client->pers.classSelection = PCL_NONE; //TA: reset the classtype

  self->takedamage = qtrue; // can still be gibbed

  self->s.weapon = WP_NONE;
  /*self->s.powerups = 0;*/ //TA: class is encoded into powerups in trem
  self->r.contents = CONTENTS_CORPSE;

  self->s.angles[ PITCH ] = 0;
  self->s.angles[ ROLL ] = 0;
  self->s.angles[ YAW ] = self->s.apos.trBase[ YAW ];
  LookAtKiller( self, inflictor, attacker );

  VectorCopy( self->s.angles, self->client->ps.viewangles );

  self->s.loopSound = 0;

  self->r.maxs[ 2 ] = -8;

  // don't allow respawn until the death anim is done
  // g_forcerespawn may force spawning at some later time
  self->client->respawnTime = level.time + 1700;

  // remove powerups
  memset( self->client->ps.powerups, 0, sizeof( self->client->ps.powerups ) );

  {
    // normal death
    static int i;

    if( !( self->client->ps.persistant[ PERS_STATE ] & PS_NONSEGMODEL ) )
    {
      switch( i )
      {
        case 0:
          anim = BOTH_DEATH1;
          break;
        case 1:
          anim = BOTH_DEATH2;
          break;
        case 2:
        default:
          anim = BOTH_DEATH3;
          break;
      }
    }
    else
    {
      switch( i )
      {
        case 0:
          anim = NSPA_DEATH1;
          break;
        case 1:
          anim = NSPA_DEATH2;
          break;
        case 2:
        default:
          anim = NSPA_DEATH3;
          break;
      }
    }

    // for the no-blood option, we need to prevent the health
    // from going to gib level
    if( self->health <= GIB_HEALTH )
      self->health = GIB_HEALTH+1;

    self->client->ps.legsAnim =
      ( ( self->client->ps.legsAnim & ANIM_TOGGLEBIT ) ^ ANIM_TOGGLEBIT ) | anim;
    
    if( !( self->client->ps.persistant[ PERS_STATE ] & PS_NONSEGMODEL ) )
    {
      self->client->ps.torsoAnim =
        ( ( self->client->ps.torsoAnim & ANIM_TOGGLEBIT ) ^ ANIM_TOGGLEBIT ) | anim;
    }

    G_AddEvent( self, EV_DEATH1 + i, killer );

    // the body can still be gibbed
    self->die = body_die;

    // globally cycle through the different death animations
    i = ( i + 1 ) % 3;
  }

  trap_LinkEntity( self );
}


////////TA: locdamage

/*
===============
G_ParseArmourScript
===============
*/
void G_ParseArmourScript( char *buf, int upgrade )
{
	char	*token;
	int		count;

	count = 0;

	while( 1 )
  {
		token = COM_Parse( &buf );
    
		if( !token[0] )
			break;
      
		if( strcmp( token, "{" ) )
    {
			G_Printf( "Missing { in armour file\n" );
			break;
		}

		if( count == MAX_ARMOUR_REGIONS )
    {
			G_Printf( "Max armour regions exceeded in locdamage file\n" );
			break;
		}

    //default
    g_armourRegions[ upgrade ][ count ].minHeight = 0.0;
    g_armourRegions[ upgrade ][ count ].maxHeight = 1.0;
    g_armourRegions[ upgrade ][ count ].minAngle = 0;
    g_armourRegions[ upgrade ][ count ].maxAngle = 360;
    g_armourRegions[ upgrade ][ count ].modifier = 1.0;
    g_armourRegions[ upgrade ][ count ].crouch = qfalse;
    
    while( 1 )
    {
			token = COM_ParseExt( &buf, qtrue );
      
			if( !token[0] )
      {
				G_Printf( "Unexpected end of armour file\n" );
				break;
			}
      
			if( !Q_stricmp( token, "}" ) )
      {
				break;
      }
      else if( !strcmp( token, "minHeight" ) )
      {
			  token = COM_ParseExt( &buf, qfalse );

			  if ( !token[0] )
				  strcpy( token, "0" );

        g_armourRegions[ upgrade ][ count ].minHeight = atof( token );
      }
      else if( !strcmp( token, "maxHeight" ) )
      {
			  token = COM_ParseExt( &buf, qfalse );

			  if ( !token[0] )
				  strcpy( token, "100" );

        g_armourRegions[ upgrade ][ count ].maxHeight = atof( token );
      }
      else if( !strcmp( token, "minAngle" ) )
      {
			  token = COM_ParseExt( &buf, qfalse );

			  if ( !token[0] )
				  strcpy( token, "0" );

        g_armourRegions[ upgrade ][ count ].minAngle = atoi( token );
      }
      else if( !strcmp( token, "maxAngle" ) )
      {
			  token = COM_ParseExt( &buf, qfalse );

			  if ( !token[0] )
				  strcpy( token, "360" );

        g_armourRegions[ upgrade ][ count ].maxAngle = atoi( token );
      }
      else if( !strcmp( token, "modifier" ) )
      {
			  token = COM_ParseExt( &buf, qfalse );

			  if ( !token[0] )
				  strcpy( token, "1.0" );

        g_armourRegions[ upgrade ][ count ].modifier = atof( token );
      }
      else if( !strcmp( token, "crouch" ) )
      {
        g_armourRegions[ upgrade ][ count ].crouch = qtrue;
      }
		}

    g_numArmourRegions[ upgrade ]++;
    count++;
	}
}


/*
===============
G_ParseDmgScript
===============
*/
void G_ParseDmgScript( char *buf, int class )
{
	char	*token;
	int		count;

	count = 0;

	while( 1 )
  {
		token = COM_Parse( &buf );
    
		if( !token[0] )
			break;
      
		if( strcmp( token, "{" ) )
    {
			G_Printf( "Missing { in locdamage file\n" );
			break;
		}

		if( count == MAX_LOCDAMAGE_REGIONS )
    {
			G_Printf( "Max damage regions exceeded in locdamage file\n" );
			break;
		}

    //default
    g_damageRegions[ class ][ count ].minHeight = 0.0;
    g_damageRegions[ class ][ count ].maxHeight = 1.0;
    g_damageRegions[ class ][ count ].minAngle = 0;
    g_damageRegions[ class ][ count ].maxAngle = 360;
    g_damageRegions[ class ][ count ].modifier = 1.0;
    g_damageRegions[ class ][ count ].crouch = qfalse;
    
    while( 1 )
    {
			token = COM_ParseExt( &buf, qtrue );
      
			if( !token[0] )
      {
				G_Printf( "Unexpected end of locdamage file\n" );
				break;
			}
      
			if( !Q_stricmp( token, "}" ) )
      {
				break;
      }
      else if( !strcmp( token, "minHeight" ) )
      {
			  token = COM_ParseExt( &buf, qfalse );

			  if ( !token[0] )
				  strcpy( token, "0" );

        g_damageRegions[ class ][ count ].minHeight = atof( token );
      }
      else if( !strcmp( token, "maxHeight" ) )
      {
			  token = COM_ParseExt( &buf, qfalse );

			  if ( !token[0] )
				  strcpy( token, "100" );

        g_damageRegions[ class ][ count ].maxHeight = atof( token );
      }
      else if( !strcmp( token, "minAngle" ) )
      {
			  token = COM_ParseExt( &buf, qfalse );

			  if ( !token[0] )
				  strcpy( token, "0" );

        g_damageRegions[ class ][ count ].minAngle = atoi( token );
      }
      else if( !strcmp( token, "maxAngle" ) )
      {
			  token = COM_ParseExt( &buf, qfalse );

			  if ( !token[0] )
				  strcpy( token, "360" );

        g_damageRegions[ class ][ count ].maxAngle = atoi( token );
      }
      else if( !strcmp( token, "modifier" ) )
      {
			  token = COM_ParseExt( &buf, qfalse );

			  if ( !token[0] )
				  strcpy( token, "1.0" );

        g_damageRegions[ class ][ count ].modifier = atof( token );
      }
      else if( !strcmp( token, "crouch" ) )
      {
        g_damageRegions[ class ][ count ].crouch = qtrue;
      }
		}

    g_numDamageRegions[ class ]++;
    count++;
	}
}


/* 
============
G_CalcDamageModifier
============
*/
static float G_CalcDamageModifier( vec3_t point, gentity_t *targ, gentity_t *attacker, int class, int dflags )
{
  vec3_t  bulletPath;
  vec3_t  bulletAngle;
  vec3_t  pMINUSfloor, floor, normal;

  float   clientHeight, hitRelative, hitRatio;
  int     bulletRotation, clientRotation, hitRotation;
  float   modifier = 1.0f;
  int     i, j;

  if( point == NULL )
    return 1.0f;

  clientHeight = targ->r.maxs[ 2 ] - targ->r.mins[ 2 ];  

  if( targ->client->ps.stats[ STAT_STATE ] & SS_WALLCLIMBING )
    VectorCopy( targ->client->ps.grapplePoint, normal );
  else
    VectorSet( normal, 0, 0, 1 );

  VectorMA( targ->r.currentOrigin, targ->r.mins[ 2 ], normal, floor );
  VectorSubtract( point, floor, pMINUSfloor );
  
  hitRelative = DotProduct( normal, pMINUSfloor ) / VectorLength( normal );

  if( hitRelative < 0.0f )
    hitRelative = 0.0f;
  
  if( hitRelative > clientHeight )
    hitRelative = clientHeight;

  hitRatio = hitRelative / clientHeight;
                                
  VectorSubtract( targ->r.currentOrigin, point, bulletPath ); 
  vectoangles( bulletPath, bulletAngle );

  clientRotation = targ->client->ps.viewangles[ YAW ];
  bulletRotation = bulletAngle[ YAW ];

  hitRotation = abs( clientRotation - bulletRotation );
  
  hitRotation = hitRotation % 360; // Keep it in the 0-359 range

  if( !( dflags & DAMAGE_NO_LOCDAMAGE ) )
  {
    for( i = 0; i < g_numDamageRegions[ class ]; i++ )
    {
      qboolean rotationBound;
      
      if( g_damageRegions[ class ][ i ].minAngle >
          g_damageRegions[ class ][ i ].maxAngle )
      {
        rotationBound = ( hitRotation >= g_damageRegions[ class ][ i ].minAngle &&
                          hitRotation <= 360 ) || ( hitRotation >= 0 &&
                          hitRotation <= g_damageRegions[ class ][ i ].maxAngle );
      }
      else
      {
        rotationBound = ( hitRotation >= g_damageRegions[ class ][ i ].minAngle &&
                          hitRotation <= g_damageRegions[ class ][ i ].maxAngle );
      }
      
      if( rotationBound &&
          hitRatio >= g_damageRegions[ class ][ i ].minHeight &&
          hitRatio <= g_damageRegions[ class ][ i ].maxHeight &&
          ( g_damageRegions[ class ][ i ].crouch ==
            ( targ->client->ps.pm_flags & PMF_DUCKED ) ) )
        modifier *= g_damageRegions[ class ][ i ].modifier;
    }
  }

  for( i = UP_NONE + 1; i < UP_NUM_UPGRADES; i++ )
  {
    if( BG_gotItem( i, targ->client->ps.stats ) )
    {
      for( j = 0; j < g_numArmourRegions[ i ]; j++ )
      {
        qboolean rotationBound;
        
        if( g_armourRegions[ i ][ j ].minAngle >
            g_armourRegions[ i ][ j ].maxAngle )
        {
          rotationBound = ( hitRotation >= g_armourRegions[ i ][ j ].minAngle &&
                            hitRotation <= 360 ) || ( hitRotation >= 0 &&
                            hitRotation <= g_armourRegions[ i ][ j ].maxAngle );
        }
        else
        {
          rotationBound = ( hitRotation >= g_armourRegions[ i ][ j ].minAngle &&
                            hitRotation <= g_armourRegions[ i ][ j ].maxAngle );
        }
        
        if( rotationBound &&
            hitRatio >= g_armourRegions[ i ][ j ].minHeight &&
            hitRatio <= g_armourRegions[ i ][ j ].maxHeight &&
            ( g_armourRegions[ i ][ j ].crouch ==
              ( targ->client->ps.pm_flags & PMF_DUCKED ) ) )
          modifier *= g_armourRegions[ i ][ j ].modifier;
      }
    }
  }
  
  return modifier;
}


/*
============
G_InitDamageLocations
============
*/
void G_InitDamageLocations( void )
{
  char          *modelName;
  char          filename[ MAX_QPATH ];
  int           i;
	int				    len;
	fileHandle_t	fileHandle;
	char			    buffer[ MAX_LOCDAMAGE_TEXT ];

  for( i = PCL_NONE + 1; i < PCL_NUM_CLASSES; i++ )
  {
    modelName = BG_FindModelNameForClass( i );
    Com_sprintf( filename, sizeof( filename ), "models/players/%s/locdamage.cfg", modelName );

    len = trap_FS_FOpenFile( filename, &fileHandle, FS_READ );
    if ( !fileHandle )
    {
      G_Printf( va( S_COLOR_RED "file not found: %s\n", filename ) );
      continue;
    }
    
    if( len >= MAX_LOCDAMAGE_TEXT )
    {
      G_Printf( va( S_COLOR_RED "file too large: %s is %i, max allowed is %i", filename, len, MAX_LOCDAMAGE_TEXT ) );
      trap_FS_FCloseFile( fileHandle );
      continue;
    }

    trap_FS_Read( buffer, len, fileHandle );
    buffer[len] = 0;
    trap_FS_FCloseFile( fileHandle );
      
    G_ParseDmgScript( buffer, i );
  }
  
  for( i = UP_NONE + 1; i < UP_NUM_UPGRADES; i++ )
  {
    modelName = BG_FindNameForUpgrade( i );
    Com_sprintf( filename, sizeof( filename ), "armour/%s.armour", modelName );

    len = trap_FS_FOpenFile( filename, &fileHandle, FS_READ );
    
    //no file - no parsage
    if ( !fileHandle )
      continue;
    
    if( len >= MAX_LOCDAMAGE_TEXT )
    {
      G_Printf( va( S_COLOR_RED "file too large: %s is %i, max allowed is %i", filename, len, MAX_LOCDAMAGE_TEXT ) );
      trap_FS_FCloseFile( fileHandle );
      continue;
    }

    trap_FS_Read( buffer, len, fileHandle );
    buffer[len] = 0;
    trap_FS_FCloseFile( fileHandle );
      
    G_ParseArmourScript( buffer, i );
  }
}

////////TA: locdamage


/*
============
T_Damage

targ    entity that is being damaged
inflictor entity that is causing the damage
attacker  entity that caused the inflictor to damage targ
  example: targ=monster, inflictor=rocket, attacker=player

dir     direction of the attack for knockback
point   point at which the damage is being inflicted, used for headshots
damage    amount of damage being inflicted
knockback force to be applied against targ as a result of the damage

inflictor, attacker, dir, and point can be NULL for environmental effects

dflags    these flags are used to control how T_Damage works
  DAMAGE_RADIUS     damage was indirect (from a nearby explosion)
  DAMAGE_NO_ARMOR     armor does not protect from this damage
  DAMAGE_NO_KNOCKBACK   do not affect velocity, just view angles
  DAMAGE_NO_PROTECTION  kills godmode, armor, everything
============
*/

//TA: team is the team that is immune to this damage
void G_SelectiveDamage( gentity_t *targ, gentity_t *inflictor, gentity_t *attacker,
         vec3_t dir, vec3_t point, int damage, int dflags, int mod, int team )
{
  if( targ->client && ( team != targ->client->ps.stats[ STAT_PTEAM ] ) )
    G_Damage( targ, inflictor, attacker, dir, point, damage, dflags, mod );
}

void G_Damage( gentity_t *targ, gentity_t *inflictor, gentity_t *attacker,
         vec3_t dir, vec3_t point, int damage, int dflags, int mod )
{
  gclient_t *client;
  int     take;
  int     save;
  int     asave;
  int     knockback;
  int     max;

  if( !targ->takedamage )
    return;

  // the intermission has allready been qualified for, so don't
  // allow any extra scoring
  if( level.intermissionQueued )
    return;

  if( !inflictor )
    inflictor = &g_entities[ ENTITYNUM_WORLD ];
    
  if( !attacker )
    attacker = &g_entities[ ENTITYNUM_WORLD ];

  // shootable doors / buttons don't actually have any health
  if( targ->s.eType == ET_MOVER )
  {
    if( targ->use && ( targ->moverState == MOVER_POS1 ||
                       targ->moverState == ROTATOR_POS1 ) )
      targ->use( targ, inflictor, attacker );
      
    return;
  }

  client = targ->client;

  if( client ) 
  {
    if( client->noclip )
      return;
  }

  if( !dir )
    dflags |= DAMAGE_NO_KNOCKBACK;
  else
    VectorNormalize( dir );

  knockback = damage;

  if( targ->client )
  {
    knockback = (int)( (float)knockback *
      BG_FindKnockbackScaleForClass( targ->client->ps.stats[ STAT_PCLASS ] ) );
  }
  
  if( knockback > 200 )
    knockback = 200;
    
  if( targ->flags & FL_NO_KNOCKBACK )
    knockback = 0;

  if( dflags & DAMAGE_NO_KNOCKBACK )
    knockback = 0;

  // figure momentum add, even if the damage won't be taken
  if( knockback && targ->client )
  {
    vec3_t  kvel;
    float   mass;

    mass = 200;

    VectorScale( dir, g_knockback.value * (float)knockback / mass, kvel );
    VectorAdd( targ->client->ps.velocity, kvel, targ->client->ps.velocity );

    // set the timer so that the other client can't cancel
    // out the movement immediately
    if( !targ->client->ps.pm_time )
    {
      int   t;

      t = knockback * 2;
      if( t < 50 )
        t = 50;
        
      if( t > 200 )
        t = 200;
        
      targ->client->ps.pm_time = t;
      targ->client->ps.pm_flags |= PMF_TIME_KNOCKBACK;
    }
  }

  // check for completely getting out of the damage
  if( !( dflags & DAMAGE_NO_PROTECTION ) )
  {

    // if TF_NO_FRIENDLY_FIRE is set, don't do damage to the target
    // if the attacker was on the same team
    if( targ != attacker && OnSameTeam( targ, attacker ) )
    {
      if( !g_friendlyFire.integer )
        return;
    }

    // check for godmode
    if ( targ->flags & FL_GODMODE )
      return;
  }

  // add to the attacker's hit counter
  if( attacker->client && targ != attacker && targ->health > 0
      && targ->s.eType != ET_MISSILE
      && targ->s.eType != ET_GENERAL )
  {
    if( OnSameTeam( targ, attacker ) )
      attacker->client->ps.persistant[ PERS_HITS ]--;
    else
      attacker->client->ps.persistant[ PERS_HITS ]++;
  }

  if( damage < 1 )
    damage = 1;
    
  take = damage;
  save = 0;

  if( g_debugDamage.integer )
  {
    G_Printf( "%i: client:%i health:%i damage:%i armor:%i\n", level.time, targ->s.number,
      targ->health, take, asave );
  }

  // add to the damage inflicted on a player this frame
  // the total will be turned into screen blends and view angle kicks
  // at the end of the frame
  if( client )
  {
    if( attacker )
      client->ps.persistant[ PERS_ATTACKER ] = attacker->s.number;
    else
      client->ps.persistant[ PERS_ATTACKER ] = ENTITYNUM_WORLD;
      
    client->damage_armor += asave;
    client->damage_blood += take;
    client->damage_knockback += knockback;
    
    if( dir )
    {
      VectorCopy ( dir, client->damage_from );
      client->damage_fromWorld = qfalse;
    }
    else
    {
      VectorCopy ( targ->r.currentOrigin, client->damage_from );
      client->damage_fromWorld = qtrue;
    }

    // set the last client who damaged the target
    targ->client->lasthurt_client = attacker->s.number;
    targ->client->lasthurt_mod = mod;
    take = (int)( (float)take * G_CalcDamageModifier( point, targ, attacker,
                                                      client->ps.stats[ STAT_PCLASS ], dflags ) );

    //if boosted poison every attack
    if( attacker->client && attacker->client->ps.stats[ STAT_STATE ] & SS_BOOSTED )
    {
      if( !( targ->client->ps.stats[ STAT_STATE ] & SS_POISONED ) &&
          !BG_gotItem( UP_BATTLESUIT, targ->client->ps.stats ) &&
          mod != MOD_CHIMERA_ZAP )
      {
        targ->client->ps.stats[ STAT_STATE ] |= SS_POISONED;
        targ->client->lastPoisonTime = level.time;
        targ->client->lastPoisonClient = attacker;
      }
    }
  }

  // do the damage
  if( take )
  {
    targ->health = targ->health - take;

    if( targ->s.eType == ET_BUILDABLE )
    {
      if( targ->biteam == BIT_ALIENS )
        G_AddEvent( targ, EV_ALIEN_BUILDABLE_DAMAGE, 0 );
      else if( targ->biteam == BIT_HUMANS )
        G_AddEvent( targ, EV_HUMAN_BUILDABLE_DAMAGE, 0 );
    }
    
    if( targ->client )
    {
      targ->client->ps.stats[ STAT_HEALTH ] = targ->health;
      targ->client->lastDamageTime = level.time;
    }

    //TA: add to the attackers "account" on the target
    if( targ->client && attacker->client &&
        targ->client->ps.stats[ STAT_PTEAM ] == PTE_ALIENS &&
        attacker->client->ps.stats[ STAT_PTEAM ] == PTE_HUMANS )
      targ->credits[ attacker->client->ps.clientNum ] += take;

    if( targ->health <= 0 )
    {
      if( client )
        targ->flags |= FL_NO_KNOCKBACK;

      if( targ->health < -999 )
        targ->health = -999;

      targ->enemy = attacker;
      targ->die( targ, inflictor, attacker, take, mod );
      return;
    }
    else if( targ->pain )
      targ->pain( targ, attacker, take );
  }
}


/*
============
CanDamage

Returns qtrue if the inflictor can directly damage the target.  Used for
explosions and melee attacks.
============
*/
qboolean CanDamage( gentity_t *targ, vec3_t origin )
{
  vec3_t  dest;
  trace_t tr;
  vec3_t  midpoint;

  // use the midpoint of the bounds instead of the origin, because
  // bmodels may have their origin is 0,0,0
  VectorAdd( targ->r.absmin, targ->r.absmax, midpoint );
  VectorScale( midpoint, 0.5, midpoint );

  VectorCopy( midpoint, dest );
  trap_Trace( &tr, origin, vec3_origin, vec3_origin, dest, ENTITYNUM_NONE, MASK_SOLID );
  if( tr.fraction == 1.0  || tr.entityNum == targ->s.number )
    return qtrue;

  // this should probably check in the plane of projection,
  // rather than in world coordinate, and also include Z
  VectorCopy( midpoint, dest );
  dest[ 0 ] += 15.0;
  dest[ 1 ] += 15.0;
  trap_Trace( &tr, origin, vec3_origin, vec3_origin, dest, ENTITYNUM_NONE, MASK_SOLID );
  if( tr.fraction == 1.0 )
    return qtrue;

  VectorCopy( midpoint, dest );
  dest[ 0 ] += 15.0;
  dest[ 1 ] -= 15.0;
  trap_Trace( &tr, origin, vec3_origin, vec3_origin, dest, ENTITYNUM_NONE, MASK_SOLID );
  if( tr.fraction == 1.0 )
    return qtrue;

  VectorCopy( midpoint, dest );
  dest[ 0 ] -= 15.0;
  dest[ 1 ] += 15.0;
  trap_Trace( &tr, origin, vec3_origin, vec3_origin, dest, ENTITYNUM_NONE, MASK_SOLID );
  if( tr.fraction == 1.0 )
    return qtrue;

  VectorCopy( midpoint, dest );
  dest[ 0 ] -= 15.0;
  dest[ 1 ] -= 15.0;
  trap_Trace( &tr, origin, vec3_origin, vec3_origin, dest, ENTITYNUM_NONE, MASK_SOLID );
  if( tr.fraction == 1.0 )
    return qtrue;

  return qfalse;
}


//TA:
/*
============
G_SelectiveRadiusDamage
============
*/
qboolean G_SelectiveRadiusDamage( vec3_t origin, gentity_t *attacker, float damage,
                                  float radius, gentity_t *ignore, int mod, int team )
{
  float     points, dist;
  gentity_t *ent;
  int       entityList[ MAX_GENTITIES ];
  int       numListedEntities;
  vec3_t    mins, maxs;
  vec3_t    v;
  vec3_t    dir;
  int       i, e;
  qboolean  hitClient = qfalse;

  if( radius < 1 )
    radius = 1;

  for( i = 0; i < 3; i++ )
  {
    mins[ i ] = origin[ i ] - radius;
    maxs[ i ] = origin[ i ] + radius;
  }

  numListedEntities = trap_EntitiesInBox( mins, maxs, entityList, MAX_GENTITIES );

  for( e = 0; e < numListedEntities; e++ )
  {
    ent = &g_entities[ entityList[ e ] ];

    if( ent == ignore )
      continue;
    
    if( !ent->takedamage )
      continue;

    // find the distance from the edge of the bounding box
    for( i = 0 ; i < 3 ; i++ )
    {
      if( origin[ i ] < ent->r.absmin[ i ] )
        v[ i ] = ent->r.absmin[ i ] - origin[ i ];
      else if( origin[ i ] > ent->r.absmax[ i ] )
        v[ i ] = origin[ i ] - ent->r.absmax[ i ];
      else
        v[ i ] = 0;
    }

    dist = VectorLength( v );
    if( dist >= radius )
      continue;

    points = damage * ( 1.0 - dist / radius );

    if( CanDamage( ent, origin ) )
    {
      VectorSubtract( ent->r.currentOrigin, origin, dir );
      // push the center of mass higher than the origin so players
      // get knocked into the air more
      dir[ 2 ] += 24;
      G_SelectiveDamage( ent, NULL, attacker, dir, origin, (int)points, DAMAGE_RADIUS, mod, team );
    }
  }

  return hitClient;
}


/*
============
G_RadiusDamage
============
*/
qboolean G_RadiusDamage( vec3_t origin, gentity_t *attacker, float damage,
                         float radius, gentity_t *ignore, int mod )
{
  float     points, dist;
  gentity_t *ent;
  int       entityList[ MAX_GENTITIES ];
  int       numListedEntities;
  vec3_t    mins, maxs;
  vec3_t    v;
  vec3_t    dir;
  int       i, e;
  qboolean  hitClient = qfalse;

  if( radius < 1 )
    radius = 1;

  for( i = 0; i < 3; i++ )
  {
    mins[ i ] = origin[ i ] - radius;
    maxs[ i ] = origin[ i ] + radius;
  }

  numListedEntities = trap_EntitiesInBox( mins, maxs, entityList, MAX_GENTITIES );

  for( e = 0; e < numListedEntities; e++ )
  {
    ent = &g_entities[ entityList[ e ] ];

    if( ent == ignore )
      continue;
    
    if( !ent->takedamage )
      continue;

    // find the distance from the edge of the bounding box
    for( i = 0; i < 3; i++ )
    {
      if( origin[ i ] < ent->r.absmin[ i ] )
        v[ i ] = ent->r.absmin[ i ] - origin[ i ];
      else if( origin[ i ] > ent->r.absmax[ i ] )
        v[ i ] = origin[ i ] - ent->r.absmax[ i ];
      else
        v[ i ] = 0;
    }

    dist = VectorLength( v );
    if( dist >= radius )
      continue;

    points = damage * ( 1.0 - dist / radius );

    if( CanDamage( ent, origin ) )
    {
      VectorSubtract( ent->r.currentOrigin, origin, dir );
      // push the center of mass higher than the origin so players
      // get knocked into the air more
      dir[ 2 ] += 24;
      G_Damage( ent, NULL, attacker, dir, origin, (int)points, DAMAGE_RADIUS, mod );
    }
  }

  return hitClient;
}