#include <sourcemod>
#include <sdktools>

public Plugin:myinfo = 
{
	name = "Anti Tank Bug",
	author = "Eyal282 ( FuckTheSchool )",
	description = "Prevents Tank incapacitated bug that prevents tank from dying if he was healed some how ( this plugin probably only valid for servers with !buy )",
	version = "1.0",
	url = "<- URL ->"
}
public OnPluginStart()
{
	// The cvar to enable the plugin. 0 = Disabled. 1 = Enabled and kill the tank when he has 0 HP. Other values = Enabled and revive the tank that got 0 HP ( Best one because if the bug occurs, the tank did !buy heal and failed to go back but lost his points ).
	CreateConVar("l4d2_anti_tank_bug", "2");
	
	// Hook the event for when a player gets incapacitated ( called for tank start of death as well )
	HookEvent("player_incapacitated", Event_Incap, EventHookMode_Post);
}
public Action: Event_Incap(Handle hEvent, const char[] name, bool dontBroadcast)
{
	// Is the cvar enabled?
	if(GetConVarInt(FindConVar("l4d2_anti_tank_bug")) == 0)
		return Plugin_Continue;
		
	// Get the client ID of the incapacitated player.
	new Tank = GetClientOfUserId(GetEventInt(hEvent, "userid"));
	
	// Is it a human player?
	if(IsFakeClient(Tank))
		return Plugin_Continue;
	
	// Is he an infected? Because the event only calls on tanks and survivors, we can already assume it's a tank.
	if(GetClientTeam(Tank) != 3)
		return Plugin_Continue;
	
	// 7.0 seconds are enough to determine if the tank is bugged or died properly.
	CreateTimer(7.0, Check_Bug, GetClientUserId(Tank));
	
	return Plugin_Continue;
}

public Action:Check_Bug(Handle Timer, int UserId)
{
	new Tank = GetClientOfUserId(UserId);
	
	// Is he connected?
	if(!IsClientInGame(Tank))
		return Plugin_Continue;
	
	// Is he alive or the bug never occured?
	else if(!IsPlayerAlive(Tank))
		return Plugin_Continue;
	
	// Is he an infected? 
	else if(GetClientTeam(Tank) != 3)
		return Plugin_Continue;
	
	// Is he a tank? He had 0.5 seconds to do !buy hunter or something.
	else if(GetEntProp(Tank, Prop_Send, "m_zombieClass") != 8)
		return Plugin_Continue; 
	
	// The console variable is set to 1. Killing the Tank.
	if(GetConVarInt(FindConVar("l4d2_anti_tank_bug")) == 1)
	{
		// Kill the tank
		ForcePlayerSuicide(Tank);
		
		// Tell the Tank that he died because he was bugged.
		PrintToChat(Tank, "You were killed due to Tank bug immortality.");
	}
	
	// The console variable is above 1 ( already checked if 0 ). Reviving the Tank.
	else
	{
		new Float:AbsOrigin[3];
		new Float:EyeAngles[3];
		
		
		// Get the Tank's current location.
		GetClientAbsOrigin(Tank, AbsOrigin);
		
		// Get the location the tank was looking at.
		GetClientEyeAngles(Tank, EyeAngles);
		
		// Kill the tank
		ForcePlayerSuicide(Tank);
		
		
		// Check the current flags of the command z_spawn_old
		new flags = GetCommandFlags("z_spawn_old");
	
		// Make the game think z_spawn_old is not a cheat command. The flags earlier are to maintain all current flags.
		SetCommandFlags("z_spawn_old", flags & ~FCVAR_CHEAT);
	
		// Force the Tank to write z_spawn_old Tank which revives him as a tank.
		FakeClientCommand(Tank, "z_spawn_old Tank");
		
		// Give the flags back to the command z_spawn_old ( if not done then everybody can do z_spawn_old which is bad ).
		SetCommandFlags("z_spawn_old", flags);
		
		// Teleport the Tank to his old position with the same way he looked at.
		TeleportEntity(Tank, AbsOrigin, EyeAngles, NULL_VECTOR);
		
		// Tell the Tank that he was "revived" to continue punching the survivors since he probably did !buy heal on himself.
		PrintToChat(Tank, "You were revived due to Tank bug immortality.");
	}
		
	return Plugin_Continue;
}