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

#pragma tabsize 0

float GrenadeDamage = 1000.0
float PipeBombDamage = 1000.0
float BarrelDamage = 1000.0

float GrenadeRadius = 500.0
float PipeRadius = 500.0
float BarrelRadius = 500.0

bool IsAllow = false;

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];
        GetEdictClassname(entity, classname, 128);
        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, PropType:0, "m_vecOrigin", pos, 0);
    GranadeExplode(pos);
}

public int BombTouch(int entity)
{
    float pos[3];
    GetEntPropVector(entity, PropType:0, "m_vecOrigin", pos, 0);
    BombExplode(pos)
}

public int BarrelTouch(int entity)
{
    float pos[3];
    GetEntPropVector(entity, PropType:0, "m_vecOrigin", pos, 0);
    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)
                {
                    float iOne = GrenadeRadius - fDistance
                    float vForward = GrenadeRadius / iOne
                    int iDamage = RoundToCeil(GrenadeDamage / (vForward * vForward))
                    ForceDamageEntity(i, iDamage, i)
                }
            }
        }
    }
}

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 < PipeRadius)
                {
                    float iOne = PipeRadius - fDistance
                    float vForward = PipeRadius / iOne
                    int iDamage = RoundToCeil(PipeBombDamage / (vForward * vForward))
                    ForceDamageEntity(i, iDamage, i)
                }

            }
        }
    }
}

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)
                {
                    float iOne = BarrelRadius - fDistance
                    float vForward = BarrelRadius / iOne
                    int iDamage = RoundToCeil(BarrelDamage / (vForward * vForward))
                    ForceDamageEntity(i, iDamage, i)
                }
            }
        }
    }
}

stock void ForceDamageEntity(int causer, int damage, int victim) // thanks to 达斯*维达
{
    float victim_origin[3];
    char rupture[32];
    char damage_victim[32];
    IntToString(damage, rupture, sizeof(rupture));
    Format(damage_victim, sizeof(damage_victim), "hurtme%d", victim);
    GetEntPropVector(victim, Prop_Send, "m_vecOrigin", victim_origin);
    int entity = CreateEntityByName("point_hurt");
    DispatchKeyValue(victim, "targetname", damage_victim);
    DispatchKeyValue(entity, "DamageTarget", damage_victim);
    DispatchKeyValue(entity, "Damage", rupture);
    DispatchSpawn(entity);
    TeleportEntity(entity, victim_origin, NULL_VECTOR, NULL_VECTOR);
    AcceptEntityInput(entity, "Hurt", (causer > 0 && causer <= MaxClients) ? causer : -1);
    DispatchKeyValue(entity, "classname", "point_hurt");
    DispatchKeyValue(victim, "targetname", "null");
    AcceptEntityInput(entity, "Kill");
}

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;
}