#include <sourcemod>
#include <sdktools>
#include sdkhooks

#pragma tabsize 0

float GrenadeRadius = 1000.0
float PipeBombRadius = 1000.0
float BarrelRadius = 1000.0

bool IsAllow = false;

Handle g_hConfStagger;

public OnPluginStart()
{
    Handle hConf = LoadGameConfigFile("StaggerInfected");
    if( hConf == null )
        SetFailState("Missing required 'gamedata/l4d2_airstrike.txt', please re-download.");
    StartPrepSDKCall(SDKCall_Player);
    if( PrepSDKCall_SetFromConf(hConf, SDKConf_Signature, "CTerrorPlayer::OnStaggered") == false )
        SetFailState("Could not load the 'CTerrorPlayer::OnStaggered' gamedata signature.");
    PrepSDKCall_AddParameter(SDKType_CBaseEntity, SDKPass_Pointer);
    PrepSDKCall_AddParameter(SDKType_Vector, SDKPass_ByRef);
    g_hConfStagger = EndPrepSDKCall();
    if( g_hConfStagger == null )
        SetFailState("Could not prep the 'CTerrorPlayer::OnStaggered' function.");
}

public OnMapStart()
{
    IsAllow = false;
    CreateTimer(3.0, allow)
}

public Action allow(Handle timer)
{
    IsAllow = true;
}

public void OnEntityDestroyed(int entity)
{
    if(!IsAllow) return;

    if (IsValidEntity(entity) && IsValidEdict(entity))
    {
        char classname[128];
        GetEntityClassname(entity, classname, sizeof(classname));
        if (StrEqual(classname, "grenade_launcher_projectile", false))
        {
            GrenadeTouch(entity);
        }
        if (StrEqual(classname, "pipe_bomb_projectile", false))
        {
            BombTouch(entity);
        }
        if (StrEqual(classname, "prop_fuel_barrel", false))
        {
            BarrelTouch(entity);
        }
    }
}

public int GrenadeTouch(int entity)
{
    float pos[3];
    GetEntPropVector(entity, Prop_Send, "m_vecOrigin", pos);
    GranadeExplode(pos);
}

public int BombTouch(int entity)
{
    float pos[3];
    GetEntPropVector(entity, Prop_Send, "m_vecOrigin", pos);
    BombExplode(pos)
}

public int BarrelTouch(int entity)
{
    float pos[3];
    GetEntPropVector(entity, Prop_Send, "m_vecOrigin", pos);
    BarrelExplode(pos);
}

int GranadeExplode(float pos[3])
{
    float fDistance = 0.0;
    float pos2[3];
    for( int i = 0; i < 32; i++ )
    {
        if(IsValidClient(i) && GetClientTeam(i) == 3)
        {
            int vClass = GetEntProp(i, Prop_Send, "m_zombieClass")
            if(vClass == 6)
            {
                GetClientAbsOrigin(i, pos2);
                fDistance = GetVectorDistance(pos, pos2);
                if(fDistance < GrenadeRadius)
                {
                    SDKCall(g_hConfStagger, i, 0.0, pos2);
                }
            }
        }
    }
}

int BombExplode(float pos[3])
{
    float fDistance = 0.0;
    float pos2[3];
    for( int i = 0; i < 32; i++ )
    {
        if(IsValidClient(i) && GetClientTeam(i) == 3)
        {
            int vClass = GetEntProp(i, Prop_Send, "m_zombieClass")
            if(vClass == 6)
            {
                GetClientAbsOrigin(i, pos2);
                fDistance = GetVectorDistance(pos, pos2);
                if(fDistance < PipeBombRadius)
                {
                    SDKCall(g_hConfStagger, i, 0.0, pos2);
                }

            }
        }
    }
}

int BarrelExplode(float pos[3])
{
    float fDistance = 0.0;
    float pos2[3];
    for( int i = 0; i < 32; i++ )
    {
        if(IsValidClient(i) && GetClientTeam(i) == 3)
        {
            int vClass = GetEntProp(i, Prop_Send, "m_zombieClass")
            if(vClass == 6)
            {
                GetClientAbsOrigin(i, pos2);
                fDistance = GetVectorDistance(pos, pos2);
                if(fDistance < BarrelRadius)
                {
                    SDKCall(g_hConfStagger, i, 0.0, pos2);
                }
            }
        }
    }
}

stock bool:IsValidClient(client)
{
    if ( client < 1 || client > MaxClients ) return false;
    if ( !IsClientConnected( client )) return false;
    if ( !IsClientInGame( client )) return false;
    if ( GetClientTeam( client ) != 3 ) return false;
    return true;
}