#include "precompiled.h"

short s_iBeamSprite = 0;

constexpr int COS_TABLE_SIZE = 256;
float cosTable[COS_TABLE_SIZE];

bool UTIL_IsNameTaken(const char *name, bool ignoreHumans)
{
	for (int i = 1; i <= gpGlobals->maxClients; i++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(i);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		if (FStrEq(STRING(pPlayer->pev->netname), ""))
			continue;

		if (pPlayer->IsPlayer() && pPlayer->IsBot())
		{
			// bots can have prefixes so we need to check the name
			// against the profile name instead.
			CBot *bot = static_cast<CBot *>(pPlayer);
			if (FStrEq(name, bot->GetProfile()->GetName()))
			{
				return true;
			}
		}
		else
		{
			if (!ignoreHumans)
			{
				if (FStrEq(name, STRING(pPlayer->pev->netname)))
					return true;
			}
		}
	}

	return false;
}

int UTIL_ClientsInGame()
{
	int iCount = 0;

	for (int iIndex = 1; iIndex <= gpGlobals->maxClients; iIndex++)
	{
		CBaseEntity *pPlayer = UTIL_PlayerByIndex(iIndex);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		if (FStrEq(STRING(pPlayer->pev->netname), ""))
			continue;

		iCount++;
	}

	return iCount;
}

int UTIL_ActivePlayersInGame()
{
	int iCount = 0;

	for (int iIndex = 1; iIndex <= gpGlobals->maxClients; iIndex++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(iIndex);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		if (FStrEq(STRING(pPlayer->pev->netname), ""))
			continue;

		// ignore spectators
		if (pPlayer->m_iTeam != TERRORIST && pPlayer->m_iTeam != CT)
			continue;

		if (pPlayer->m_iJoiningState != JOINED)
			continue;

		iCount++;
	}

	return iCount;
}

int UTIL_HumansInGame(bool ignoreSpectators)
{
	int iCount = 0;

	for (int iIndex = 1; iIndex <= gpGlobals->maxClients; iIndex++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(iIndex);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		if (FStrEq(STRING(pPlayer->pev->netname), ""))
			continue;

#ifdef REGAMEDLL_FIXES
		if (ignoreSpectators && pPlayer->IsProxy())
			continue;
#endif

		if (pPlayer->IsBot())
			continue;

		if (ignoreSpectators && pPlayer->m_iTeam != TERRORIST && pPlayer->m_iTeam != CT)
			continue;

		if (ignoreSpectators && pPlayer->m_iJoiningState != JOINED)
			continue;

		iCount++;
	}

	return iCount;
}

// Returns the number of human spectators in the game
int UTIL_SpectatorsInGame()
{
	int iCount = 0;

	for (int iIndex = 1; iIndex <= gpGlobals->maxClients; iIndex++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(iIndex);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		if (FStrEq(STRING(pPlayer->pev->netname), ""))
			continue;

		if (pPlayer->IsProxy())
			continue;

		if (pPlayer->IsBot())
			continue;

		if (pPlayer->m_iTeam != SPECTATOR)
			continue;

		iCount++;
	}

	return iCount;
}

int UTIL_HumansOnTeam(int teamID, bool isAlive)
{
	int iCount = 0;

	for (int iIndex = 1; iIndex <= gpGlobals->maxClients; iIndex++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(iIndex);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		if (FStrEq(STRING(pPlayer->pev->netname), ""))
			continue;

		if (pPlayer->IsBot())
			continue;

		if (pPlayer->m_iTeam != teamID)
			continue;

		if (isAlive && !pPlayer->IsAlive())
			continue;

		iCount++;
	}

	return iCount;
}

int UTIL_BotsInGame()
{
	int iCount = 0;

	for (int iIndex = 1; iIndex <= gpGlobals->maxClients; iIndex++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(iIndex);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		if (FStrEq(STRING(pPlayer->pev->netname), ""))
			continue;

		if (!pPlayer->IsBot())
			continue;

		iCount++;
	}

	return iCount;
}

bool UTIL_KickBotFromTeam(TeamName kickTeam)
{
	int i;

	// try to kick a dead bot first
	for (i = 1; i <= gpGlobals->maxClients; i++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(i);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		const char *name = STRING(pPlayer->pev->netname);
		if (FStrEq(name, ""))
			continue;

		if (!pPlayer->IsBot())
			continue;

		if (!pPlayer->IsAlive() && pPlayer->m_iTeam == kickTeam)
		{
			// its a bot on the right team - kick it
			SERVER_COMMAND(UTIL_VarArgs("kick \"%s\"\n", STRING(pPlayer->pev->netname)));
			return true;
		}
	}

	// no dead bots, kick any bot on the given team
	for (i = 1; i <= gpGlobals->maxClients; i++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(i);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		const char *name = STRING(pPlayer->pev->netname);
		if (FStrEq(name, ""))
			continue;

		if (!pPlayer->IsBot())
			continue;

		if (pPlayer->m_iTeam == kickTeam)
		{
			// its a bot on the right team - kick it
			SERVER_COMMAND(UTIL_VarArgs("kick \"%s\"\n", STRING(pPlayer->pev->netname)));
			return true;
		}
	}

	return false;
}

bool UTIL_IsTeamAllBots(int team)
{
	int botCount = 0;

	for (int i = 1; i <= gpGlobals->maxClients; i++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(i);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		if (pPlayer->m_iTeam != team)
			continue;

		if (FStrEq(STRING(pPlayer->pev->netname), ""))
			continue;

		if (!(pPlayer->pev->flags & FL_FAKECLIENT))
			return false;

		botCount++;
	}

	return botCount ? true : false;
}

// Return the closest active player to the given position.
// If 'distance' is non-NULL, the distance to the closest player is returned in it.
extern CBasePlayer *UTIL_GetClosestPlayer(const Vector *pos, float *distance)
{
	CBasePlayer *closePlayer = nullptr;
	float closeDistSq = 1.0e12f;	// 999999999999.9f

	for (int i = 1; i <= gpGlobals->maxClients; i++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(i);

		if (!IsEntityValid(pPlayer))
			continue;

		if (!pPlayer->IsAlive())
			continue;

		float distSq = (pPlayer->pev->origin - *pos).LengthSquared();
		if (distSq < closeDistSq)
		{
			closeDistSq = distSq;
			closePlayer = pPlayer;
		}
	}

	if (distance)
		*distance = Q_sqrt(closeDistSq);

	return closePlayer;
}

// Return the closest active player on the given team to the given position.
// If 'distance' is non-NULL, the distance to the closest player is returned in it.
extern CBasePlayer *UTIL_GetClosestPlayer(const Vector *pos, int team, float *distance)
{
	CBasePlayer *closePlayer = nullptr;
	float closeDistSq = 1.0e12f;	// 999999999999.9f

	for (int i = 1; i <= gpGlobals->maxClients; i++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(i);

		if (!IsEntityValid(pPlayer))
			continue;

		if (!pPlayer->IsAlive())
			continue;

		if (pPlayer->m_iTeam != team)
			continue;

		float distSq = (pPlayer->pev->origin - *pos).LengthSquared();
		if (distSq < closeDistSq)
		{
			closeDistSq = distSq;
			closePlayer = pPlayer;
		}
	}

	if (distance)
		*distance = Q_sqrt(closeDistSq);

	return closePlayer;
}

const char *UTIL_GetBotPrefix()
{
	return cv_bot_prefix.string;
}

void UTIL_ConstructBotNetName(char *name, int nameLength, const BotProfile *profile)
{
	if (!profile)
	{
		name[0] = '\0';
		return;
	}

	// if there is no bot prefix just use the profile name.
	if (!UTIL_GetBotPrefix() || Q_strlen(UTIL_GetBotPrefix()) == 0)
	{
		Q_strncpy(name, profile->GetName(), nameLength - 1);
		name[nameLength - 1] = '\0';
		return;
	}

	Q_snprintf(name, nameLength, "%s %s", UTIL_GetBotPrefix(), profile->GetName());
}

bool UTIL_IsVisibleToTeam(const Vector &spot, int team, float maxRange)
{
	for (int i = 1; i <= gpGlobals->maxClients; i++)
	{
		CBasePlayer *pPlayer = UTIL_PlayerByIndex(i);

		if (!UTIL_IsValidPlayer(pPlayer))
			continue;

		if (FStrEq(STRING(pPlayer->pev->netname), ""))
			continue;

		if (!pPlayer->IsAlive())
			continue;

		if (pPlayer->m_iTeam != team)
			continue;

		if (maxRange > 0.0f && (spot - pPlayer->Center()).IsLengthGreaterThan(maxRange))
			continue;

		TraceResult result;
		UTIL_TraceLine(pPlayer->EyePosition(), spot, ignore_monsters, ignore_glass, ENT(pPlayer->pev), &result);

		if (result.flFraction == 1.0f)
			return true;
	}

	return false;
}

// Return the local player
CBasePlayer *UTIL_GetLocalPlayer()
{
	// no "local player" if this is a dedicated server or a single player game
	if (IS_DEDICATED_SERVER())
	{
#ifdef _DEBUG
		// just try to find any player
		for (int iIndex = 1; iIndex <= gpGlobals->maxClients; iIndex++)
		{
			CBasePlayer *pPlayer = UTIL_PlayerByIndex(iIndex);

			if (!UTIL_IsValidPlayer(pPlayer))
				continue;

			if (FStrEq(STRING(pPlayer->pev->netname), ""))
				continue;

			if (pPlayer->IsBot())
				continue;

			if (pPlayer->m_iTeam != TERRORIST && pPlayer->m_iTeam != CT)
				continue;

			if (pPlayer->m_iJoiningState != JOINED)
				continue;

			return pPlayer;
		}
#endif

		return nullptr;
	}

	return UTIL_PlayerByIndex(1);
}

NOXREF Vector UTIL_ComputeOrigin(entvars_t *pevVars)
{
	if (pevVars->origin.x == 0.0f && pevVars->origin.y == 0.0f && pevVars->origin.z == 0.0f)
		return (pevVars->absmax + pevVars->absmin) * 0.5f;
	else
		return pevVars->origin;
}

NOXREF Vector UTIL_ComputeOrigin(CBaseEntity *pEntity)
{
	return UTIL_ComputeOrigin(pEntity->pev);
}

NOXREF Vector UTIL_ComputeOrigin(edict_t *pentEdict)
{
	return UTIL_ComputeOrigin(VARS(pentEdict));
}

NOXREF void UTIL_DrawBeamFromEnt(int iIndex, Vector vecEnd, int iLifetime, byte bRed, byte bGreen, byte bBlue)
{
	MESSAGE_BEGIN(MSG_PVS, SVC_TEMPENTITY, vecEnd);
		WRITE_BYTE(TE_BEAMENTPOINT);
		WRITE_SHORT(iIndex);
		WRITE_COORD(vecEnd.x);
		WRITE_COORD(vecEnd.y);
		WRITE_COORD(vecEnd.z);
		WRITE_SHORT(s_iBeamSprite);
		WRITE_BYTE(0);
		WRITE_BYTE(0);
		WRITE_BYTE(iLifetime);
		WRITE_BYTE(10);
		WRITE_BYTE(0);
		WRITE_BYTE(bRed);
		WRITE_BYTE(bGreen);
		WRITE_BYTE(bBlue);
		WRITE_BYTE(255);
		WRITE_BYTE(0);
	MESSAGE_END();
}

void UTIL_DrawBeamPoints(Vector vecStart, Vector vecEnd, int iLifetime, byte bRed, byte bGreen, byte bBlue)
{
	MESSAGE_BEGIN(MSG_PVS, SVC_TEMPENTITY, vecStart);
		WRITE_BYTE(TE_BEAMPOINTS);
		WRITE_COORD(vecStart.x);
		WRITE_COORD(vecStart.y);
		WRITE_COORD(vecStart.z);
		WRITE_COORD(vecEnd.x);
		WRITE_COORD(vecEnd.y);
		WRITE_COORD(vecEnd.z);
		WRITE_SHORT(s_iBeamSprite);
		WRITE_BYTE(0);
		WRITE_BYTE(0);
		WRITE_BYTE(iLifetime);
		WRITE_BYTE(10);
		WRITE_BYTE(0);
		WRITE_BYTE(bRed);
		WRITE_BYTE(bGreen);
		WRITE_BYTE(bBlue);
		WRITE_BYTE(255);
		WRITE_BYTE(0);
	MESSAGE_END();
}

void UTIL_DrawBox(Extent *extent, int lifetime, int red, int green, int blue)
{
	Vector v[8];
	v[0].x = extent->lo.x; v[0].y = extent->lo.y; v[0].z = extent->lo.z;
	v[1].x = extent->hi.x; v[1].y = extent->lo.y; v[1].z = extent->lo.z;
	v[2].x = extent->hi.x; v[2].y = extent->hi.y; v[2].z = extent->lo.z;
	v[3].x = extent->lo.x; v[3].y = extent->hi.y; v[3].z = extent->lo.z;
	v[4].x = extent->lo.x; v[4].y = extent->lo.y; v[4].z = extent->hi.z;
	v[5].x = extent->hi.x; v[5].y = extent->lo.y; v[5].z = extent->hi.z;
	v[6].x = extent->hi.x; v[6].y = extent->hi.y; v[6].z = extent->hi.z;
	v[7].x = extent->lo.x; v[7].y = extent->hi.y; v[7].z = extent->hi.z;

	static int edge[] =
	{
		1, 2, 3, 4, -1,
		5, 6, 7, 8, -5,
		1, -5,
		2, -6,
		3, -7,
		4, -8,
		0	// end iterator
	};

	Vector from, to;
	bool restart = true;

	for (int i = 0; edge[i] != 0; i++)
	{
		if (restart)
		{
			to = v[edge[i] - 1];
			restart = false;
			continue;
		}

		from = to;

		int index = edge[i];
		if (index < 0)
		{
			restart = true;
			index = -index;
		}

		to = v[index - 1];

		UTIL_DrawBeamPoints(from, to, lifetime, red, green, blue);
		UTIL_DrawBeamPoints(to, from, lifetime, red, green, blue);
	}
}

void CONSOLE_ECHO(const char *pszMsg, ...)
{
	va_list argptr;
	static char szStr[1024];

	va_start(argptr, pszMsg);
	vsprintf(szStr, pszMsg, argptr);
	va_end(argptr);

	SERVER_PRINT(szStr);
}

void CONSOLE_ECHO_LOGGED(const char *pszMsg, ...)
{
	va_list argptr;
	static char szStr[1024];

	va_start(argptr, pszMsg);
	vsprintf(szStr, pszMsg, argptr);
	va_end(argptr);

	SERVER_PRINT(szStr);
	UTIL_LogPrintf(szStr);
}

void BotPrecache()
{
#ifdef REGAMEDLL_FIXES
	// all resources above are used between navarea, improved bots and tutor
	// you can run cs1.6 with bots so it's not only limited to czero
	if (!AreRunningCZero() && !AreBotsAllowed())
		return;
#endif

	s_iBeamSprite = PRECACHE_MODEL("sprites/smoke.spr");

	PRECACHE_SOUND("buttons/bell1.wav");
	PRECACHE_SOUND("buttons/blip1.wav");
	PRECACHE_SOUND("buttons/blip2.wav");
	PRECACHE_SOUND("buttons/button11.wav");
	PRECACHE_SOUND("buttons/latchunlocked2.wav");
	PRECACHE_SOUND("buttons/lightswitch2.wav");

#ifdef REGAMEDLL_FIXES
	PRECACHE_GENERIC("sound/ambience/quail1.wav");
#else
	PRECACHE_SOUND("ambience/quail1.wav"); // not used internally
#endif

	PRECACHE_SOUND("events/tutor_msg.wav");
	PRECACHE_SOUND("events/enemy_died.wav");
	PRECACHE_SOUND("events/friend_died.wav");
	PRECACHE_SOUND("events/task_complete.wav");
}

void InitBotTrig()
{
	for (int i = 0; i < COS_TABLE_SIZE; i++)
	{
		real_t angle = 2.0f * M_PI * float(i) / float(COS_TABLE_SIZE - 1);
		cosTable[i] = Q_cos(angle);
	}
}

float BotCOS(float angle)
{
	angle = NormalizeAnglePositive(angle);
	int i = angle * ((COS_TABLE_SIZE - 1) / 360.0f);
	return cosTable[i];
}

float BotSIN(float angle)
{
	angle = NormalizeAnglePositive(angle - 90);
	int i = angle * ((COS_TABLE_SIZE - 1) / 360.0f);
	return cosTable[i];
}

// Determine if this event is audible, and if so, return its audible range and priority
bool IsGameEventAudible(GameEventType event, CBaseEntity *pEntity, CBaseEntity *pOther, float *range, PriorityType *priority, bool *isHostile)
{
	CBasePlayer *pPlayer = static_cast<CBasePlayer *>(pEntity);

	if (!pEntity || !pPlayer->IsPlayer())
		pPlayer = nullptr;

	const float ShortRange = 1000.0f;
	const float NormalRange = 2000.0f;

	switch (event)
	{
	// TODO: Check weapon type (knives are pretty quiet)
	// TODO: Use actual volume, account for silencers, etc.
	case EVENT_WEAPON_FIRED:
	{
		if (!pPlayer->m_pActiveItem)
			return false;

		switch (pPlayer->m_pActiveItem->m_iId)
		{
		// silent "firing"
		case WEAPON_HEGRENADE:
		case WEAPON_SMOKEGRENADE:
		case WEAPON_FLASHBANG:
		case WEAPON_SHIELDGUN:
		case WEAPON_C4:
			return false;
		// quiet
		case WEAPON_KNIFE:
		case WEAPON_TMP:
			*range = ShortRange;
			break;
		// M4A1 - check for silencer
		case WEAPON_M4A1:
		{
			CBasePlayerWeapon *pWeapon = static_cast<CBasePlayerWeapon *>(pPlayer->m_pActiveItem);
			if (pWeapon->m_iWeaponState & WPNSTATE_M4A1_SILENCED)
				*range = ShortRange;
			else
				*range = NormalRange;
			break;
		}
		// USP - check for silencer
		case WEAPON_USP:
		{
			CBasePlayerWeapon *pWeapon = static_cast<CBasePlayerWeapon *>(pPlayer->m_pActiveItem);
			if (pWeapon->m_iWeaponState & WPNSTATE_USP_SILENCED)
				*range = ShortRange;
			else
				*range = NormalRange;
			break;
		}
		// loud
		case WEAPON_AWP:
			*range = 99999.0f;
			break;
		// normal
		default:
			*range = NormalRange;
			break;
		}

		*priority = PRIORITY_HIGH;
		*isHostile = true;
		return true;
	}
	case EVENT_HE_GRENADE_EXPLODED:
		*range = 99999.0f;
		*priority = PRIORITY_HIGH;
		*isHostile = true;
		return true;

	case EVENT_FLASHBANG_GRENADE_EXPLODED:
		*range = 1000.0f;
		*priority = PRIORITY_LOW;
		*isHostile = true;
		return true;

	case EVENT_SMOKE_GRENADE_EXPLODED:
		*range = 1000.0f;
		*priority = PRIORITY_LOW;
		*isHostile = true;
		return true;

	case EVENT_GRENADE_BOUNCED:
		*range = 500.0f;
		*priority = PRIORITY_LOW;
		*isHostile = true;
		return true;

	case EVENT_BREAK_GLASS:
	case EVENT_BREAK_WOOD:
	case EVENT_BREAK_METAL:
	case EVENT_BREAK_FLESH:
	case EVENT_BREAK_CONCRETE:
		*range = 1100.0f;
		*priority = PRIORITY_MEDIUM;
		*isHostile = true;
		return true;

	case EVENT_DOOR:
		*range = 1100.0f;
		*priority = PRIORITY_MEDIUM;
		*isHostile = false;
		return true;

	case EVENT_WEAPON_FIRED_ON_EMPTY:
	case EVENT_PLAYER_FOOTSTEP:
	case EVENT_WEAPON_RELOADED:
	case EVENT_WEAPON_ZOOMED:
	case EVENT_PLAYER_LANDED_FROM_HEIGHT:
		*range = 1100.0f;
		*priority = PRIORITY_LOW;
		*isHostile = false;
		return true;

	case EVENT_HOSTAGE_USED:
	case EVENT_HOSTAGE_CALLED_FOR_HELP:
		*range = 1200.0f;
		*priority = PRIORITY_MEDIUM;
		*isHostile = false;
		return true;
	}

	return false;
}

void HintMessageToAllPlayers(const char *message)
{
	hudtextparms_t textParms;

	textParms.x = -1.0f;
	textParms.y = -1.0f;
	textParms.effect = 0;

	textParms.r1 = 100;
	textParms.g1 = 255;
	textParms.b1 = 100;

	textParms.r2 = 255;
	textParms.g2 = 255;
	textParms.b2 = 255;

	textParms.fadeinTime = 1.0f;
	textParms.fadeoutTime = 5.0f;
	textParms.holdTime = 5.0f;
	textParms.fxTime = 0.0f;

	textParms.channel = 0;

	UTIL_HudMessageAll(textParms, message);
}