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

//Survivors
float iDamageGrenadeLauncherS = 2000.0;
float iPowerSFling = 600.0;
float iRadiusSdie = 200.0
float iRadiusSFling = 900.0
float iRadiusSDamage = 400.0

//Survivors Pipe Bomb
float iDamagePipeS = 600.0;
float iPowerSFlingPipe = 550.0;
float iRadiusSdiePipe = 200.0
float iRadiusSFlingPipe = 700.0
float iRadiusSDamagePipe = 900.0

//Barrel
float iDamageB = 600.0;
float iPowerBFling = 550.0;
float iRadiusBdie = 200.0
float iRadiusBFling = 700.0
float iRadiusBDamage = 900.0

Handle sdkCallPushPlayer;

public OnPluginStart()
{
    Handle GameConf = LoadGameConfigFile("gamedata_stager");

    if(GameConf == INVALID_HANDLE)
    {
        SetFailState("Couldn't find the offsets and signatures file. Please, check that it is installed correctly.");
    }

    StartPrepSDKCall(SDKCall_Player);
    PrepSDKCall_SetFromConf(GameConf, SDKConf_Signature, "CTerrorPlayer_Fling");
    PrepSDKCall_AddParameter(SDKType_Vector, SDKPass_ByRef);
    PrepSDKCall_AddParameter(SDKType_PlainOldData, SDKPass_Plain);
    PrepSDKCall_AddParameter(SDKType_CBasePlayer, SDKPass_Pointer);
    PrepSDKCall_AddParameter(SDKType_Float, SDKPass_Plain);
    sdkCallPushPlayer = EndPrepSDKCall();
}

public void OnEntityDestroyed(int entity)
{
    if (IsValidEntity(entity) && IsValidEdict(entity))
    {
        char classname[128];
        GetEdictClassname(entity, classname, 128);
        if (StrEqual(classname, "grenade_launcher_projectile", false))
        {
            for( int i = 0; i < 32; i++ )
            {
                if (IsValidClient(i) && GetClientTeam(i) == 2 && IsPlayerAlive(i))
                {
                    GrenadeTouch(entity, i);
                }
            }
        }
        if (StrEqual(classname, "pipe_bomb_projectile", false))
        {
            for( int i = 0; i < 32; i++ )
            {
                if (IsValidClient(i) && GetClientTeam(i) == 2 && IsPlayerAlive(i))
                {
                    BombTouch(entity, i);
                }
            }
        }
        if (StrEqual(classname, "prop_fuel_barrel", false))
        {
            for( int i = 0; i < 32; i++ )
            {
                if (IsValidClient(i) && GetClientTeam(i) == 2 && IsPlayerAlive(i))
                {
                    BarrelTouch(entity, i);
                }
            }
        }
    }
}

public int GrenadeTouch(int entity, int target)
{
    float pos[3];
    GetEntPropVector(entity, PropType:0, "m_vecOrigin", pos, 0);
    GranadeExplode(entity, pos, iRadiusSDamage, iDamageGrenadeLauncherS);
}

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

public int BarrelTouch(int entity, int target)
{
    float pos[3];
    GetEntPropVector(entity, PropType:0, "m_vecOrigin", pos, 0);
    BarrelExplode(entity, pos, iRadiusBDamage, iDamageB);
}

int GranadeExplode(int entity, float pos[3], float radius, float damage)
{
    int explosion = CreateEntityByName("env_explosion", -1);
    DispatchKeyValue(explosion, "spawnflags", "64");
    DispatchKeyValueFloat(explosion, "iMagnitude", damage);
    DispatchKeyValueFloat(explosion, "iRadiusOverride", radius);
    DispatchSpawn(explosion);
    TeleportEntity(explosion, pos, NULL_VECTOR, NULL_VECTOR);
    AcceptEntityInput(explosion, "Explode", -1, -1, 0);
    AcceptEntityInput(explosion, "Kill", -1, -1, 0);

    float fDistance = 0.0;
    float pos2[3];
    for( int i = 0; i < 32; i++ )
    {
        if (IsValidClient(i) && GetClientTeam(i) == 2 && IsPlayerAlive(i))
        {
            GetClientAbsOrigin(i, pos2);
            fDistance = GetVectorDistance(pos, pos2);
            if(fDistance < iRadiusSFling)
            {
                Fly(entity, i, iPowerSFling)
            }
            if(fDistance < iRadiusSdie)
            {
                ForcePlayerSuicide(i)
            }
        }
    }
}

int BombExplode(int entity, float pos[3], float radius, float damage)
{
    int explosion = CreateEntityByName("env_explosion", -1);
    DispatchKeyValue(explosion, "spawnflags", "1916");
    DispatchKeyValueFloat(explosion, "iMagnitude", damage);
    DispatchKeyValueFloat(explosion, "iRadiusOverride", radius);
    DispatchSpawn(explosion);
    TeleportEntity(explosion, pos, NULL_VECTOR, NULL_VECTOR);
    AcceptEntityInput(explosion, "Explode", -1, -1, 0);
    AcceptEntityInput(explosion, "Kill", -1, -1, 0);

    float fDistance = 0.0;
    float pos2[3];
    for( int i = 0; i < 32; i++ )
    {
        if (IsValidClient(i) && GetClientTeam(i) == 2 && IsPlayerAlive(i))
        {
            GetClientAbsOrigin(i, pos2);
            fDistance = GetVectorDistance(pos, pos2);
            if(fDistance < iRadiusSFlingPipe)
            {
                Fly(entity, i, iPowerSFlingPipe)
            }
            if(fDistance < iRadiusSdiePipe)
            {
                ForcePlayerSuicide(i)
            }
        }
    }
}

int BarrelExplode(int entity, float pos[3], float radius, float damage)
{
    int explosion = CreateEntityByName("env_explosion", -1);
    DispatchKeyValue(explosion, "spawnflags", "1916");
    DispatchKeyValueFloat(explosion, "iMagnitude", damage);
    DispatchKeyValueFloat(explosion, "iRadiusOverride", radius);
    DispatchSpawn(explosion);
    TeleportEntity(explosion, pos, NULL_VECTOR, NULL_VECTOR);
    AcceptEntityInput(explosion, "Explode", -1, -1, 0);
    AcceptEntityInput(explosion, "Kill", -1, -1, 0);

    float fDistance = 0.0;
    float pos2[3];
    for( int i = 0; i < 32; i++ )
    {
        if (IsValidClient(i) && GetClientTeam(i) == 2 && IsPlayerAlive(i))
        {
            GetClientAbsOrigin(i, pos2);
            fDistance = GetVectorDistance(pos, pos2);
            if(fDistance < iRadiusBFling)
            {
                Fly(entity, i, iPowerBFling)
            }
            if(fDistance < iRadiusBdie)
            {
                ForcePlayerSuicide(i)
            }
        }
    }
}

/*
static bool IsVisibleTo(float position[3], float targetposition[3])
{
    float vAngles[3], vLookAt[3];

    MakeVectorFromPoints(position, targetposition, vLookAt); // compute vector from start to target
    GetVectorAngles(vLookAt, vAngles); // get angles from vector for trace

    // execute Trace
    Handle trace = TR_TraceRayFilterEx(position, vAngles, MASK_SHOT, RayType_Infinite, _TraceFilter);

    bool isVisible = false;
    if (TR_DidHit(trace))
    {
        float vStart[3];
        TR_GetEndPosition(vStart, trace); // retrieve our trace endpoint

        if ((GetVectorDistance(position, vStart, false) + 25.0) >= GetVectorDistance(position, targetposition))
        {
            isVisible = true; // if trace ray length plus tolerance equal or bigger absolute distance, you hit the target
        }
    }

    return isVisible;
}

public bool _TraceFilter(int entity, int contentsMask)
{
    if (!entity || entity <= MaxClients || !IsValidEntity(entity)) // dont let WORLD, or invalid entities be hit
    {
        return false;
    }
    return true;
}
*/
public Fly(explosion, int target, float power)
{
    if(target <= 0 || !IsValidEntity(target) || !IsValidEdict(target))  return;

    float targetPos[3], explosionPos[3], traceVec[3], resultingFling[3];

    GetEntPropVector(target, Prop_Data, "m_vecOrigin", targetPos);
    GetEntPropVector(explosion, Prop_Data,"m_vecOrigin", explosionPos);

    if(power < 1)
        return;

    MakeVectorFromPoints(explosionPos, targetPos, traceVec);
    GetVectorAngles(traceVec, resultingFling);

    resultingFling[0] = Cosine(DegToRad(resultingFling[1])) * power;
    resultingFling[1] = Sine(DegToRad(resultingFling[1])) * power;
    resultingFling[2] = power + (power * 0.5);

    if (GetClientTeam(target) == 2)
    {
        SDKCall(sdkCallPushPlayer, target, resultingFling, 76, target, 2.0);
    }
    else
    {
        SDKCall(sdkCallPushPlayer, target, resultingFling, 2, target, 2.0);
    }

}



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(int client)
{
    if ( client < 1 || client > MaxClients ) return false;
    if( !IsClientInGame(client)) return false;
    if ( !IsPlayerAlive( client )) return false;
    return true;
}