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

/*
 *  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 GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 2.1, 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser 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.
 */

/*  To assertain which portions are licensed under the LGPL and which are
 *  licensed by Id Software, Inc. please run a diff between the equivalent
 *  versions of the "Tremulous" modification and the unmodified "Quake3"
 *  game source code.
 */
                    
#include "g_local.h"

qboolean  G_SpawnString( const char *key, const char *defaultString, char **out ) {
  int   i;

  if ( !level.spawning ) {
    *out = (char *)defaultString;
//    G_Error( "G_SpawnString() called while not spawning" );
  }

  for ( i = 0 ; i < level.numSpawnVars ; i++ ) {
    if ( !Q_stricmp( key, level.spawnVars[i][0] ) ) {
      *out = level.spawnVars[i][1];
      return qtrue;
    }
  }

  *out = (char *)defaultString;
  return qfalse;
}

qboolean  G_SpawnFloat( const char *key, const char *defaultString, float *out ) {
  char    *s;
  qboolean  present;

  present = G_SpawnString( key, defaultString, &s );
  *out = atof( s );
  return present;
}

qboolean  G_SpawnInt( const char *key, const char *defaultString, int *out ) {
  char    *s;
  qboolean  present;

  present = G_SpawnString( key, defaultString, &s );
  *out = atoi( s );
  return present;
}

qboolean  G_SpawnVector( const char *key, const char *defaultString, float *out ) {
  char    *s;
  qboolean  present;

  present = G_SpawnString( key, defaultString, &s );
  sscanf( s, "%f %f %f", &out[0], &out[1], &out[2] );
  return present;
}

qboolean  G_SpawnVector4( const char *key, const char *defaultString, float *out ) {
  char    *s;
  qboolean  present;

  present = G_SpawnString( key, defaultString, &s );
  sscanf( s, "%f %f %f %f", &out[0], &out[1], &out[2], &out[3] );
  return present;
}



//
// fields are needed for spawning from the entity string
//
typedef enum {
  F_INT,
  F_FLOAT,
  F_LSTRING,      // string on disk, pointer in memory, TAG_LEVEL
  F_GSTRING,      // string on disk, pointer in memory, TAG_GAME
  F_VECTOR,
  F_VECTOR4,    //TA
  F_ANGLEHACK,
  F_ENTITY,     // index on disk, pointer in memory
  F_ITEM,       // index on disk, pointer in memory
  F_CLIENT,     // index on disk, pointer in memory
  F_IGNORE
} fieldtype_t;

typedef struct
{
  char  *name;
  int   ofs;
  fieldtype_t type;
  int   flags;
} field_t;

field_t fields[] = {
  {"classname", FOFS(classname), F_LSTRING},
  {"origin", FOFS(s.origin), F_VECTOR},
  {"model", FOFS(model), F_LSTRING},
  {"model2", FOFS(model2), F_LSTRING},
  {"spawnflags", FOFS(spawnflags), F_INT},
  {"speed", FOFS(speed), F_FLOAT},
  {"target", FOFS(target), F_LSTRING},
  {"targetname", FOFS(targetname), F_LSTRING},
  {"message", FOFS(message), F_LSTRING},
  {"team", FOFS(team), F_LSTRING},
  {"wait", FOFS(wait), F_FLOAT},
  {"random", FOFS(random), F_FLOAT},
  {"count", FOFS(count), F_INT},
  {"health", FOFS(health), F_INT},
  {"light", 0, F_IGNORE},
  {"dmg", FOFS(damage), F_INT},
  {"angles", FOFS(s.angles), F_VECTOR},
  {"angle", FOFS(s.angles), F_ANGLEHACK},
  //TA
  {"bounce", FOFS(physicsBounce), F_FLOAT},
  {"alpha", FOFS(pos1), F_VECTOR},
  {"radius", FOFS(pos2), F_VECTOR},
  {"acceleration", FOFS(acceleration), F_VECTOR},
  {"animation", FOFS(animation), F_VECTOR4},
  //TA
  {"targetShaderName", FOFS(targetShaderName), F_LSTRING},
  {"targetShaderNewName", FOFS(targetShaderNewName), F_LSTRING},

  {NULL}
};


typedef struct {
  char  *name;
  void  (*spawn)(gentity_t *ent);
} spawn_t;

void SP_info_player_start (gentity_t *ent);
void SP_info_player_deathmatch (gentity_t *ent);
void SP_info_player_intermission (gentity_t *ent);

//TA: extra bits
void SP_info_droid_intermission( gentity_t *ent );
void SP_info_human_intermission( gentity_t *ent );

void SP_info_firstplace(gentity_t *ent);
void SP_info_secondplace(gentity_t *ent);
void SP_info_thirdplace(gentity_t *ent);
void SP_info_podium(gentity_t *ent);

void SP_func_plat (gentity_t *ent);
void SP_func_static (gentity_t *ent);
void SP_func_rotating (gentity_t *ent);
void SP_func_bobbing (gentity_t *ent);
void SP_func_pendulum( gentity_t *ent );
void SP_func_button (gentity_t *ent);
void SP_func_door (gentity_t *ent);
void SP_func_train (gentity_t *ent);
void SP_func_timer (gentity_t *self);

void SP_trigger_always (gentity_t *ent);
void SP_trigger_multiple (gentity_t *ent);
void SP_trigger_push (gentity_t *ent);
void SP_trigger_teleport (gentity_t *ent);
void SP_trigger_hurt (gentity_t *ent);

void SP_target_remove_powerups( gentity_t *ent );
void SP_target_give (gentity_t *ent);
void SP_target_delay (gentity_t *ent);
void SP_target_speaker (gentity_t *ent);
void SP_target_print (gentity_t *ent);
void SP_target_laser (gentity_t *self);
void SP_target_character (gentity_t *ent);
void SP_target_score( gentity_t *ent );
void SP_target_teleporter( gentity_t *ent );
void SP_target_relay (gentity_t *ent);
void SP_target_kill (gentity_t *ent);
void SP_target_position (gentity_t *ent);
void SP_target_location (gentity_t *ent);
void SP_target_push (gentity_t *ent);

void SP_light (gentity_t *self);
void SP_info_null (gentity_t *self);
void SP_info_notnull (gentity_t *self);
void SP_info_camp (gentity_t *self);
void SP_path_corner (gentity_t *self);

void SP_misc_teleporter_dest (gentity_t *self);
void SP_misc_model(gentity_t *ent);
void SP_misc_portal_camera(gentity_t *ent);
void SP_misc_portal_surface(gentity_t *ent);

void SP_shooter_rocket( gentity_t *ent );
void SP_shooter_plasma( gentity_t *ent );
void SP_shooter_grenade( gentity_t *ent );

void SP_team_CTF_redplayer( gentity_t *ent );
void SP_team_CTF_blueplayer( gentity_t *ent );

void SP_team_CTF_redspawn( gentity_t *ent );
void SP_team_CTF_bluespawn( gentity_t *ent );

//TA:
void SP_misc_spriter( gentity_t *ent );
void SP_misc_anim_model( gentity_t *ent );

spawn_t spawns[] = {
  // info entities don't do anything at all, but provide positional
  // information for things controlled by other processes
  {"info_player_start", SP_info_player_start},
  {"info_player_deathmatch", SP_info_player_deathmatch},
  {"info_player_intermission", SP_info_player_intermission},

  //TA: extra bits
  {"info_droid_intermission", SP_info_droid_intermission},
  {"info_human_intermission", SP_info_human_intermission},
  
  {"info_null", SP_info_null},
  {"info_notnull", SP_info_notnull},    // use target_position instead
  {"info_camp", SP_info_camp},

  {"func_plat", SP_func_plat},
  {"func_button", SP_func_button},
  {"func_door", SP_func_door},
  {"func_static", SP_func_static},
  {"func_rotating", SP_func_rotating},
  {"func_bobbing", SP_func_bobbing},
  {"func_pendulum", SP_func_pendulum},
  {"func_train", SP_func_train},
  {"func_group", SP_info_null},
  {"func_timer", SP_func_timer},      // rename trigger_timer?

  // Triggers are brush objects that cause an effect when contacted
  // by a living player, usually involving firing targets.
  // While almost everything could be done with
  // a single trigger class and different targets, triggered effects
  // could not be client side predicted (push and teleport).
  {"trigger_always", SP_trigger_always},
  {"trigger_multiple", SP_trigger_multiple},
  {"trigger_push", SP_trigger_push},
  {"trigger_teleport", SP_trigger_teleport},
  {"trigger_hurt", SP_trigger_hurt},

  // targets perform no action by themselves, but must be triggered
  // by another entity
  {"target_give", SP_target_give},
  {"target_remove_powerups", SP_target_remove_powerups},
  {"target_delay", SP_target_delay},
  {"target_speaker", SP_target_speaker},
  {"target_print", SP_target_print},
  {"target_laser", SP_target_laser},
  {"target_score", SP_target_score},
  {"target_teleporter", SP_target_teleporter},
  {"target_relay", SP_target_relay},
  {"target_kill", SP_target_kill},
  {"target_position", SP_target_position},
  {"target_location", SP_target_location},
  {"target_push", SP_target_push},

  {"light", SP_light},
  {"path_corner", SP_path_corner},

  {"misc_teleporter_dest", SP_misc_teleporter_dest},
  {"misc_model", SP_misc_model},
  {"misc_portal_surface", SP_misc_portal_surface},
  {"misc_portal_camera", SP_misc_portal_camera},

  {"shooter_rocket", SP_shooter_rocket},
  {"shooter_grenade", SP_shooter_grenade},
  {"shooter_plasma", SP_shooter_plasma},

  {"team_CTF_redplayer", SP_team_CTF_redplayer},
  {"team_CTF_blueplayer", SP_team_CTF_blueplayer},

  {"team_CTF_redspawn", SP_team_CTF_redspawn},
  {"team_CTF_bluespawn", SP_team_CTF_bluespawn},

  {"misc_spriter", SP_misc_spriter},
  {"misc_anim_model", SP_misc_anim_model},
  
  {0, 0}
};

/*
===============
G_CallSpawn

Finds the spawn function for the entity and calls it,
returning qfalse if not found
===============
*/
qboolean G_CallSpawn( gentity_t *ent ) {
  spawn_t *s;
  gitem_t *item;

  if ( !ent->classname ) {
    G_Printf ("G_CallSpawn: NULL classname\n");
    return qfalse;
  }

  // check item spawn functions
  for ( item=bg_itemlist+1 ; item->classname ; item++ ) {
    if ( !strcmp(item->classname, ent->classname) ) {
      //TA: don't allow items to spawn (atleast for the time being - might need to later?)
      G_SpawnItem( ent, item );
      return qtrue;
      //return qfalse;
    }
  }

  // check normal spawn functions
  for ( s=spawns ; s->name ; s++ ) {
    if ( !strcmp(s->name, ent->classname) ) {
      if( G_ItemDisabled(item) )
        return qfalse;
      // found it
      s->spawn(ent);
      return qtrue;
    }
  }
  G_Printf ("%s doesn't have a spawn function\n", ent->classname);
  return qfalse;
}

/*
=============
G_NewString

Builds a copy of the string, translating \n to real linefeeds
so message texts can be multi-line
=============
*/
char *G_NewString( const char *string ) {
  char  *newb, *new_p;
  int   i,l;

  l = strlen(string) + 1;

  newb = G_Alloc( l );

  new_p = newb;

  // turn \n into a real linefeed
  for ( i=0 ; i< l ; i++ ) {
    if (string[i] == '\\' && i < l-1) {
      i++;
      if (string[i] == 'n') {
        *new_p++ = '\n';
      } else {
        *new_p++ = '\\';
      }
    } else {
      *new_p++ = string[i];
    }
  }

  return newb;
}




/*
===============
G_ParseField

Takes a key/value pair and sets the binary values
in a gentity
===============
*/
void G_ParseField( const char *key, const char *value, gentity_t *ent ) {
  field_t *f;
  byte  *b;
  float v;
  vec3_t  vec;
  vec4_t  vec4;

  for ( f=fields ; f->name ; f++ ) {
    if ( !Q_stricmp(f->name, key) ) {
      // found it
      b = (byte *)ent;

      switch( f->type ) {
      case F_LSTRING:
        *(char **)(b+f->ofs) = G_NewString (value);
        break;
      case F_VECTOR:
        sscanf (value, "%f %f %f", &vec[0], &vec[1], &vec[2]);
        ((float *)(b+f->ofs))[0] = vec[0];
        ((float *)(b+f->ofs))[1] = vec[1];
        ((float *)(b+f->ofs))[2] = vec[2];
        break;
      case F_VECTOR4:
        sscanf (value, "%f %f %f %f", &vec4[0], &vec4[1], &vec4[2], &vec4[3]);
        ((float *)(b+f->ofs))[0] = vec4[0];
        ((float *)(b+f->ofs))[1] = vec4[1];
        ((float *)(b+f->ofs))[2] = vec4[2];
        ((float *)(b+f->ofs))[3] = vec4[3];
        break;
      case F_INT:
        *(int *)(b+f->ofs) = atoi(value);
        break;
      case F_FLOAT:
        *(float *)(b+f->ofs) = atof(value);
        break;
      case F_ANGLEHACK:
        v = atof(value);
        ((float *)(b+f->ofs))[0] = 0;
        ((float *)(b+f->ofs))[1] = v;
        ((float *)(b+f->ofs))[2] = 0;
        break;
      default:
      case F_IGNORE:
        break;
      }
      return;
    }
  }
}




/*
===================
G_SpawnGEntityFromSpawnVars

Spawn an entity and fill in all of the level fields from
level.spawnVars[], then call the class specfic spawn function
===================
*/
void G_SpawnGEntityFromSpawnVars( void ) {
  int     i;
  gentity_t *ent;
  char    *s, *value, *gametypeName;
  static char *gametypeNames[] = {"ffa", "tournament", "single", "team", "ctf", "oneflag", "obelisk", "harvester", "teamtournament"};
    

  // get the next free entity
  ent = G_Spawn();

  for ( i = 0 ; i < level.numSpawnVars ; i++ ) {
    G_ParseField( level.spawnVars[i][0], level.spawnVars[i][1], ent );
  }

  // check for "notteam" / "notfree" flags
  if ( g_gametype.integer == GT_SINGLE_PLAYER ) {
    G_SpawnInt( "notsingle", "0", &i );
    if ( i ) {
      G_FreeEntity( ent );
      return;
    }
  }
  if ( g_gametype.integer >= GT_TEAM ) {
    G_SpawnInt( "notteam", "0", &i );
    if ( i ) {
      G_FreeEntity( ent );
      return;
    }
  } else {
    G_SpawnInt( "notfree", "0", &i );
    if ( i ) {
      G_FreeEntity( ent );
      return;
    }
  }

  G_SpawnInt( "notq3a", "0", &i );
  if ( i ) {
    G_FreeEntity( ent );
    return;
  }

  if( G_SpawnString( "gametype", NULL, &value ) ) {
    if( g_gametype.integer >= GT_FFA && g_gametype.integer < GT_MAX_GAME_TYPE ) {
      gametypeName = gametypeNames[g_gametype.integer];

      s = strstr( value, gametypeName );
      if( !s ) {
        G_FreeEntity( ent );
        return;
      }
    }
  }

  // move editor origin to pos
  VectorCopy( ent->s.origin, ent->s.pos.trBase );
  VectorCopy( ent->s.origin, ent->r.currentOrigin );

  // if we didn't get a classname, don't bother spawning anything
  if ( !G_CallSpawn( ent ) ) {
    G_FreeEntity( ent );
  }
}



/*
====================
G_AddSpawnVarToken
====================
*/
char *G_AddSpawnVarToken( const char *string ) {
  int   l;
  char  *dest;

  l = strlen( string );
  if ( level.numSpawnVarChars + l + 1 > MAX_SPAWN_VARS_CHARS ) {
    G_Error( "G_AddSpawnVarToken: MAX_SPAWN_CHARS" );
    
  }

  dest = level.spawnVarChars + level.numSpawnVarChars;
  memcpy( dest, string, l+1 );

  level.numSpawnVarChars += l + 1;

  return dest;
}

/*
====================
G_ParseSpawnVars

Parses a brace bounded set of key / value pairs out of the
level's entity strings into level.spawnVars[]

This does not actually spawn an entity.
====================
*/
qboolean G_ParseSpawnVars( void ) {
  char    keyname[MAX_TOKEN_CHARS];
  char    com_token[MAX_TOKEN_CHARS];

  level.numSpawnVars = 0;
  level.numSpawnVarChars = 0;

  // parse the opening brace
  if ( !trap_GetEntityToken( com_token, sizeof( com_token ) ) ) {
    // end of spawn string
    return qfalse;
  }
  if ( com_token[0] != '{' ) {
    G_Error( "G_ParseSpawnVars: found %s when expecting {",com_token );
  }

  // go through all the key / value pairs
  while ( 1 ) {
    // parse key
    if ( !trap_GetEntityToken( keyname, sizeof( keyname ) ) ) {
      G_Error( "G_ParseSpawnVars: EOF without closing brace" );
    }

    if ( keyname[0] == '}' ) {
      break;
    }

    // parse value
    if ( !trap_GetEntityToken( com_token, sizeof( com_token ) ) ) {
      G_Error( "G_ParseSpawnVars: EOF without closing brace" );
    }

    if ( com_token[0] == '}' ) {
      G_Error( "G_ParseSpawnVars: closing brace without data" );
    }
    if ( level.numSpawnVars == MAX_SPAWN_VARS ) {
      G_Error( "G_ParseSpawnVars: MAX_SPAWN_VARS" );
    }
    level.spawnVars[ level.numSpawnVars ][0] = G_AddSpawnVarToken( keyname );
    level.spawnVars[ level.numSpawnVars ][1] = G_AddSpawnVarToken( com_token );
    level.numSpawnVars++;
  }

  return qtrue;
}



/*QUAKED worldspawn (0 0 0) ?

Every map should have exactly one worldspawn.
"music"   music wav file
"gravity" 800 is default gravity
"message" Text to print during connection process
*/
void SP_worldspawn( void ) {
  char  *s;

  G_SpawnString( "classname", "", &s );
  if ( Q_stricmp( s, "worldspawn" ) ) {
    G_Error( "SP_worldspawn: The first entity isn't 'worldspawn'" );
  }

  // make some data visible to connecting client
  trap_SetConfigstring( CS_GAME_VERSION, GAME_VERSION );

  trap_SetConfigstring( CS_LEVEL_START_TIME, va("%i", level.startTime ) );

  G_SpawnString( "music", "", &s );
  trap_SetConfigstring( CS_MUSIC, s );

  G_SpawnString( "message", "", &s );
  trap_SetConfigstring( CS_MESSAGE, s );        // map specific message

  trap_SetConfigstring( CS_MOTD, g_motd.string );   // message of the day

  G_SpawnString( "gravity", "800", &s );
  trap_Cvar_Set( "g_gravity", s );

  G_SpawnString( "humanBuildPoints", "1000", &s );
  trap_Cvar_Set( "g_humanBuildPoints", s );

  G_SpawnString( "droidBuildPoints", "1000", &s );
  trap_Cvar_Set( "g_droidBuildPoints", s );

  G_SpawnString( "enableDust", "0", &s );
  trap_Cvar_Set( "g_enableDust", s );

  G_SpawnString( "enableBreath", "0", &s );
  trap_Cvar_Set( "g_enableBreath", s );

  g_entities[ENTITYNUM_WORLD].s.number = ENTITYNUM_WORLD;
  g_entities[ENTITYNUM_WORLD].classname = "worldspawn";

  // see if we want a warmup time
  trap_SetConfigstring( CS_WARMUP, "" );
  if ( g_restarted.integer ) {
    trap_Cvar_Set( "g_restarted", "0" );
    level.warmupTime = 0;
  } else if ( g_doWarmup.integer ) { // Turn it on
    level.warmupTime = -1;
    trap_SetConfigstring( CS_WARMUP, va("%i", level.warmupTime) );
    G_LogPrintf( "Warmup:\n" );
  }

}


/*
==============
G_SpawnEntitiesFromString

Parses textual entity definitions out of an entstring and spawns gentities.
==============
*/
void G_SpawnEntitiesFromString( void ) {
  // allow calls to G_Spawn*()
  level.spawning = qtrue;
  level.numSpawnVars = 0;

  // the worldspawn is not an actual entity, but it still
  // has a "spawn" function to perform any global setup
  // needed by a level (setting configstrings or cvars, etc)
  if ( !G_ParseSpawnVars() ) {
    G_Error( "SpawnEntities: no entities" );
  }
  SP_worldspawn();

  // parse ents
  while( G_ParseSpawnVars() ) {
    G_SpawnGEntityFromSpawnVars();
  }

  level.spawning = qfalse;      // any future calls to G_Spawn*() will be errors
}