#include "g_local.h"

field_t fields[] = {
	{"classname", FOFS(classname), F_LSTRING},
	{"origin", FOFS(s.origin), F_VECTOR},
	{"model", FOFS(model), F_LSTRING},
	{"spawnflags", FOFS(spawnflags), F_INT},
	{"speed", FOFS(speed), F_FLOAT},
	{"accel", FOFS(accel), F_FLOAT},
	{"decel", FOFS(accel), F_FLOAT},
	{"target", FOFS(target), F_LSTRING},
	{"targetname", FOFS(targetname), F_LSTRING},
	{"pathtarget", FOFS(pathtarget), F_LSTRING},
	{"deathtarget", FOFS(deathtarget), F_LSTRING},
	{"killtarget", FOFS(killtarget), F_LSTRING},
	{"combattarget", FOFS(combattarget), F_LSTRING},
	{"message", FOFS(message), F_LSTRING},
	{"team", FOFS(team), F_LSTRING},
	{"wait", FOFS(wait), F_FLOAT},
	{"delay", FOFS(delay), F_FLOAT},
	{"random", FOFS(random), F_FLOAT},
	{"move_origin", FOFS(move_origin), F_VECTOR},
	{"move_angles", FOFS(move_angles), F_VECTOR},
	{"style", FOFS(style), F_INT},
	{"count", FOFS(count), F_INT},
	{"health", FOFS(health), F_INT},
	{"sounds", FOFS(sounds), F_INT},
	{"light", 0, F_IGNORE},
	{"dmg", FOFS(dmg), F_INT},
	{"angles", FOFS(s.angles), F_VECTOR},
	{"angle", FOFS(s.angles), F_ANGLEHACK},
	{"mass", FOFS(mass), F_INT},
	{"volume", FOFS(volume), F_FLOAT},
	{"attenuation", FOFS(attenuation), F_FLOAT},
	{"map", FOFS(map), F_LSTRING},

	// temp spawn vars -- only valid when the spawn function is called
	{"lip", STOFS(lip), F_INT, FFL_SPAWNTEMP},
	{"distance", STOFS(distance), F_INT, FFL_SPAWNTEMP},
	{"height", STOFS(height), F_INT, FFL_SPAWNTEMP},
	{"noise", STOFS(noise), F_LSTRING, FFL_SPAWNTEMP},
	{"pausetime", STOFS(pausetime), F_FLOAT, FFL_SPAWNTEMP},
	{"item", STOFS(item), F_LSTRING, FFL_SPAWNTEMP},
	{"gravity", STOFS(gravity), F_LSTRING, FFL_SPAWNTEMP},
	{"sky", STOFS(sky), F_LSTRING, FFL_SPAWNTEMP},
	{"skyrotate", STOFS(skyrotate), F_FLOAT, FFL_SPAWNTEMP},
	{"skyaxis", STOFS(skyaxis), F_VECTOR, FFL_SPAWNTEMP},
	{"minyaw", STOFS(minyaw), F_FLOAT, FFL_SPAWNTEMP},
	{"maxyaw", STOFS(maxyaw), F_FLOAT, FFL_SPAWNTEMP},
	{"minpitch", STOFS(minpitch), F_FLOAT, FFL_SPAWNTEMP},
	{"maxpitch", STOFS(maxpitch), F_FLOAT, FFL_SPAWNTEMP},
	{"nextmap", STOFS(nextmap), F_LSTRING, FFL_SPAWNTEMP}
};

// -------- just for savegames ----------
// all pointer fields should be listed here, or savegames
// won't work properly (they will crash and burn).
// this wasn't just tacked on to the fields array, because
// these don't need names, we wouldn't want map fields using
// some of these, and if one were accidentally present twice
// it would double swizzle (fuck) the pointer.

field_t		savefields[] =
{
	{"", FOFS(classname), F_LSTRING},
	{"", FOFS(target), F_LSTRING},
	{"", FOFS(targetname), F_LSTRING},
	{"", FOFS(killtarget), F_LSTRING},
	{"", FOFS(team), F_LSTRING},
	{"", FOFS(pathtarget), F_LSTRING},
	{"", FOFS(deathtarget), F_LSTRING},
	{"", FOFS(combattarget), F_LSTRING},
	{"", FOFS(model), F_LSTRING},
	{"", FOFS(map), F_LSTRING},
	{"", FOFS(message), F_LSTRING},

	{"", FOFS(client), F_CLIENT},
	{"", FOFS(item), F_ITEM},

	{"", FOFS(goalentity), F_EDICT},
	{"", FOFS(movetarget), F_EDICT},
	{"", FOFS(enemy), F_EDICT},
	{"", FOFS(oldenemy), F_EDICT},
	{"", FOFS(activator), F_EDICT},
	{"", FOFS(groundentity), F_EDICT},
	{"", FOFS(teamchain), F_EDICT},
	{"", FOFS(teammaster), F_EDICT},
	{"", FOFS(owner), F_EDICT},
	{"", FOFS(mynoise), F_EDICT},
	{"", FOFS(mynoise2), F_EDICT},
	{"", FOFS(target_ent), F_EDICT},

	{NULL, 0, F_INT}
};

field_t		levelfields[] =
{
	{"", LLOFS(changemap), F_LSTRING},

	{"", LLOFS(sight_client), F_EDICT},
	{"", LLOFS(sight_entity), F_EDICT},
	{"", LLOFS(sound_entity), F_EDICT},
	{"", LLOFS(sound2_entity), F_EDICT},

	{NULL, 0, F_INT}
};

field_t		clientfields[] =
{
	{"", CLOFS(pers.weapon), F_ITEM},
	{"", CLOFS(newweapon), F_ITEM},

	{NULL, 0, F_INT}
};

/*
============
InitGame

This will be called when the dll is first loaded, which
only happens when a new game is begun
============
*/
void InitGame (void)
{
	int		i;

	gi.dprintf ("==== InitGame ====\n");

	gun_x = gi.cvar ("gun_x", "0", 0);
	gun_y = gi.cvar ("gun_y", "0", 0);
	gun_z = gi.cvar ("gun_z", "0", 0);

	//FIXME: sv_ prefix is wrong for these
	sv_rollspeed = gi.cvar ("sv_rollspeed", "200", 0);
	sv_rollangle = gi.cvar ("sv_rollangle", "2", 0);
	sv_maxvelocity = gi.cvar ("sv_maxvelocity", "2000", 0);
	sv_gravity = gi.cvar ("sv_gravity", "800", 0);

	// latched vars
	sv_cheats = gi.cvar ("cheats", "0", CVAR_SERVERINFO|CVAR_LATCH);
	deathmatch = gi.cvar ("deathmatch", "0", CVAR_SERVERINFO|CVAR_LATCH);
	skill = gi.cvar ("skill", "1", CVAR_SERVERINFO|CVAR_LATCH);
	maxclients = gi.cvar ("maxclients", "4", CVAR_SERVERINFO | CVAR_LATCH);
	maxentities = gi.cvar ("maxentities", "1024", CVAR_LATCH);

	// change anytime vars
	dmflags = gi.cvar ("dmflags", "0", CVAR_SERVERINFO);
	fraglimit = gi.cvar ("fraglimit", "0", CVAR_SERVERINFO);
	timelimit = gi.cvar ("timelimit", "0", CVAR_SERVERINFO);
	noexit = gi.cvar ("noexit", "1", CVAR_SERVERINFO);
	samelevel = gi.cvar ("samelevel", "0", CVAR_SERVERINFO);
	g_select_empty = gi.cvar ("g_select_empty", "0", CVAR_ARCHIVE);
	g_unlimited_ammo = gi.cvar ("g_unlimited_ammo", "0", CVAR_SERVERINFO);
	dm_respawn = gi.cvar ("dm_respawn", "2", CVAR_SERVERINFO);
	nomonsters = gi.cvar ("nomonsters", "0", CVAR_SERVERINFO);

	run_pitch = gi.cvar ("run_pitch", "0.002", 0);
	run_roll = gi.cvar ("run_roll", "0.005", 0);
	bob_up  = gi.cvar ("bob_up", "0.005", 0);
	bob_pitch = gi.cvar ("bob_pitch", "0.002", 0);
	bob_roll = gi.cvar ("bob_roll", "0.002", 0);

	// items
	InitItems ();

	Com_sprintf (game.helpmessage1, sizeof(game.helpmessage1), "No help message1");

	Com_sprintf (game.helpmessage2, sizeof(game.helpmessage2), "No help message2");

	// initialize all entities for this game
	game.maxentities = maxentities->value;
	if (maxclients->value * 8 > game.maxentities)
		game.maxentities = maxclients->value * 8;
	g_edicts =  gi.TagMalloc (game.maxentities * sizeof(g_edicts[0]), TAG_GAME);
	globals.edicts = g_edicts;
	globals.max_edicts = game.maxentities;

	// initialize all clients for this game
	game.maxclients = maxclients->value;
	game.clients = gi.TagMalloc (game.maxclients * sizeof(game.clients[0]), TAG_GAME);
	for (i=0 ; i<game.maxclients ; i++)
	{
		InitClientPersistant (&game.clients[i]);
		InitClientResp (&game.clients[i]);
	}
	globals.num_edicts = game.maxclients+1;
}

//=========================================================

void WriteField1 (FILE *f, field_t *field, byte *base)
{
	void		*p;
	int			len;
	int			index;

	p = (void *)(base + field->ofs);
	switch (field->type)
	{
	case F_INT:
	case F_FLOAT:
	case F_ANGLEHACK:
	case F_VECTOR:
	case F_IGNORE:
		break;

	case F_LSTRING:
	case F_GSTRING:
		if ( *(char **)p )
			len = strlen(*(char **)p) + 1;
		else
			len = 0;
		*(int *)p = len;
		break;
	case F_EDICT:
		if ( *(edict_t **)p == NULL)
			index = -1;
		else
			index = *(edict_t **)p - g_edicts;
		*(int *)p = index;
		break;
	case F_CLIENT:
		if ( *(gclient_t **)p == NULL)
			index = -1;
		else
			index = *(gclient_t **)p - game.clients;
		*(int *)p = index;
		break;
	case F_ITEM:
		if ( *(edict_t **)p == NULL)
			index = -1;
		else
			index = *(gitem_t **)p - itemlist;
		*(int *)p = index;
		break;

	default:
		gi.error ("WriteEdict: unknown field type");
	}
}

void WriteField2 (FILE *f, field_t *field, byte *base)
{
	int			len;
	void		*p;

	p = (void *)(base + field->ofs);
	switch (field->type)
	{
	case F_LSTRING:
	case F_GSTRING:
		if ( *(char **)p )
		{
			len = strlen(*(char **)p) + 1;
			fwrite (*(char **)p, len, 1, f);
		}
		break;
	}
}

void ReadField (FILE *f, field_t *field, byte *base)
{
	void		*p;
	int			len;
	int			index;

	p = (void *)(base + field->ofs);
	switch (field->type)
	{
	case F_INT:
	case F_FLOAT:
	case F_ANGLEHACK:
	case F_VECTOR:
	case F_IGNORE:
		break;

	case F_LSTRING:
		len = *(int *)p;
		if (!len)
			*(char **)p = NULL;
		else
		{
			*(char **)p = gi.TagMalloc (len, TAG_LEVEL);
			fread (*(char **)p, len, 1, f);
		}
		break;
	case F_GSTRING:
		len = *(int *)p;
		if (!len)
			*(char **)p = NULL;
		else
		{
			*(char **)p = gi.TagMalloc (len, TAG_GAME);
			fread (*(char **)p, len, 1, f);
		}
		break;
	case F_EDICT:
		index = *(int *)p;
		if ( index == -1 )
			*(edict_t **)p = NULL;
		else
			*(edict_t **)p = &g_edicts[index];
		break;
	case F_CLIENT:
		index = *(int *)p;
		if ( index == -1 )
			*(gclient_t **)p = NULL;
		else
			*(gclient_t **)p = &game.clients[index];
		break;
	case F_ITEM:
		index = *(int *)p;
		if ( index == -1 )
			*(gitem_t **)p = NULL;
		else
			*(gitem_t **)p = &itemlist[index];
		break;

	default:
		gi.error ("ReadEdict: unknown field type");
	}
}

//=========================================================

/*
==============
WriteClient

All pointer variables (except function pointers) must be handled specially.
==============
*/
void WriteClient (FILE *f, gclient_t *client)
{
	field_t		*field;
	gclient_t	temp;
	
	// all of the ints, floats, and vectors stay as they are
	temp = *client;

	// change the pointers to lengths or indexes
	for (field=clientfields ; field->name ; field++)
	{
		WriteField1 (f, field, (byte *)&temp);
	}

	// write the block
	fwrite (&temp, sizeof(temp), 1, f);

	// now write any allocated data following the edict
	for (field=clientfields ; field->name ; field++)
	{
		WriteField2 (f, field, (byte *)client);
	}
}

/*
==============
ReadClient

All pointer variables (except function pointers) must be handled specially.
==============
*/
void ReadClient (FILE *f, gclient_t *client)
{
	field_t		*field;

	fread (client, sizeof(*client), 1, f);

	for (field=clientfields ; field->name ; field++)
	{
		ReadField (f, field, (byte *)client);
	}
}

/*
============
WriteGame

This will be called whenever the game goes to a new level,
and when the user explicitly saves the game.

Game information include cross level data, like multi level
triggers, help computer info, and all client states.

A single player death will automatically restore from the
last save position.
============
*/
void WriteGame (char *filename)
{
	FILE	*f;
	int		i;
	char	str[16];

	SaveClientData ();

	f = fopen (filename, "wb");
	if (!f)
		gi.error ("Couldn't open %s", filename);

	memset (str, 0, sizeof(str));
	strcpy (str, __DATE__);
	fwrite (str, sizeof(str), 1, f);

	fwrite (&game, sizeof(game), 1, f);
	for (i=0 ; i<game.maxclients ; i++)
		WriteClient (f, &game.clients[i]);

	fclose (f);
}

void ReadGame (char *filename)
{
	FILE	*f;
	int		i;
	char	str[16];

	gi.FreeTags (TAG_GAME);

	f = fopen (filename, "rb");
	if (!f)
		gi.error ("Couldn't open %s", filename);

	fread (str, sizeof(str), 1, f);
	if (strcmp (str, __DATE__))
	{
		fclose (f);
		gi.error ("Savegame from an older version.\n");
	}

	g_edicts =  gi.TagMalloc (game.maxentities * sizeof(g_edicts[0]), TAG_GAME);
	globals.edicts = g_edicts;

	fread (&game, sizeof(game), 1, f);
	game.clients = gi.TagMalloc (game.maxclients * sizeof(game.clients[0]), TAG_GAME);
	for (i=0 ; i<game.maxclients ; i++)
		ReadClient (f, &game.clients[i]);

	fclose (f);
}

//==========================================================


/*
==============
WriteEdict

All pointer variables (except function pointers) must be handled specially.
==============
*/
void WriteEdict (FILE *f, edict_t *ent)
{
	field_t		*field;
	edict_t		temp;

	// all of the ints, floats, and vectors stay as they are
	temp = *ent;

	// change the pointers to lengths or indexes
	for (field=savefields ; field->name ; field++)
	{
		WriteField1 (f, field, (byte *)&temp);
	}

	// write the block
	fwrite (&temp, sizeof(temp), 1, f);

	// now write any allocated data following the edict
	for (field=savefields ; field->name ; field++)
	{
		WriteField2 (f, field, (byte *)ent);
	}

}

/*
==============
WriteLevelLocals

All pointer variables (except function pointers) must be handled specially.
==============
*/
void WriteLevelLocals (FILE *f)
{
	field_t		*field;
	level_locals_t		temp;

	// all of the ints, floats, and vectors stay as they are
	temp = level;

	// change the pointers to lengths or indexes
	for (field=levelfields ; field->name ; field++)
	{
		WriteField1 (f, field, (byte *)&temp);
	}

	// write the block
	fwrite (&temp, sizeof(temp), 1, f);

	// now write any allocated data following the edict
	for (field=levelfields ; field->name ; field++)
	{
		WriteField2 (f, field, (byte *)&level);
	}
}


/*
==============
ReadEdict

All pointer variables (except function pointers) must be handled specially.
==============
*/
void ReadEdict (FILE *f, edict_t *ent)
{
	field_t		*field;

	fread (ent, sizeof(*ent), 1, f);

	for (field=savefields ; field->name ; field++)
	{
		ReadField (f, field, (byte *)ent);
	}
}

/*
==============
ReadLevelLocals

All pointer variables (except function pointers) must be handled specially.
==============
*/
void ReadLevelLocals (FILE *f)
{
	field_t		*field;

	fread (&level, sizeof(level), 1, f);

	for (field=levelfields ; field->name ; field++)
	{
		ReadField (f, field, (byte *)&level);
	}
}

/*
=================
WriteLevel

=================
*/
void WriteLevel (char *filename)
{
	int		i;
	edict_t	*ent;
	FILE	*f;
	void	*base;

	f = fopen (filename, "wb");
	if (!f)
		gi.error ("Couldn't open %s", filename);

	// write out edict size for checking
	i = sizeof(edict_t);
	fwrite (&i, sizeof(i), 1, f);

	// write out a function pointer for checking
	base = (void *)InitGame;
	fwrite (&base, sizeof(base), 1, f);

	// write out level_locals_t
	WriteLevelLocals (f);

	// write out all the configstrings
//	fwrite (sv.configstrings, sizeof(sv.configstrings), 1, f);

	// write out all the entities
	for (i=0 ; i<globals.num_edicts ; i++)
	{
		ent = &g_edicts[i];
		if (!ent->inuse)
			continue;
		fwrite (&i, sizeof(i), 1, f);
		WriteEdict (f, ent);
	}
	i = -1;
	fwrite (&i, sizeof(i), 1, f);

	fclose (f);
}


/*
=================
ReadLevel

SpawnEntities will allready have been called on the
level the same way it was when the level was saved.

That is necessary to get the baselines
set up identically.

The server will have cleared all of the world links before
calling ReadLevel.
=================
*/
void ReadLevel (char *filename)
{
	int		entnum;
	FILE	*f;
	int		i;
	void	*base;
	edict_t	*ent;

	f = fopen (filename, "rb");
	if (!f)
		gi.error ("Couldn't open %s", filename);

	// free any dynamic memory allocated by loading the level
	// base state
	gi.FreeTags (TAG_LEVEL);

	// wipe all the entities
	memset (g_edicts, 0, game.maxentities*sizeof(g_edicts[0]));
	globals.num_edicts = maxclients->value+1;

	// check edict size
	fread (&i, sizeof(i), 1, f);
	if (i != sizeof(edict_t))
	{
		fclose (f);
		gi.error ("ReadLevel: mismatched edict size");
	}

	// check function pointer base address
	fread (&base, sizeof(base), 1, f);
	if (base != (void *)InitGame)
	{
		fclose (f);
		gi.error ("ReadLevel: function pointers have moved");
	}

	// load the level locals
	ReadLevelLocals (f);

	// load all the entities
	while (1)
	{
		if (fread (&entnum, sizeof(entnum), 1, f) != 1)
		{
			fclose (f);
			gi.error ("ReadLevel: failed to read entnum");
		}
		if (entnum == -1)
			break;
		if (entnum >= globals.num_edicts)
			globals.num_edicts = entnum+1;

		ent = &g_edicts[entnum];
		ReadEdict (f, ent);

		// let the server rebuild world links for this ent
		memset (&ent->area, 0, sizeof(ent->area));
		gi.linkentity (ent);
	}

	fclose (f);

	// wipe all the clients
	for (i=0 ; i<maxclients->value ; i++)
	{
		ent = &g_edicts[i+1];
		gi.unlinkentity (ent);
		ent->inuse = false;
	}

//	// fire any cross-level triggers here
	for (i=0 ; i<globals.num_edicts ; i++)
	{
		if (!g_edicts[i].classname)
			continue;
		if (strcmp(g_edicts[i].classname, "target_crosslevel_target") != 0)
			continue;
		g_edicts[i].nextthink = level.time + g_edicts[i].delay;
	}
}