/*
 * Author: KoffeinFlummi
 *
 * Adjusts the direction of a shell.
 *
 * Arguments:
 * -> arguments of the FiredBIS EH
 *
 * Return Value:
 * None
 */

#include "script_component.hpp"

private ["_vehicle", "_weapon", "_ammo", "_magazine", "_projectile","_velocityCorrection"];

_vehicle = _this select 0;
_weapon = _this select 1;
_ammo = _this select 4;
_magazine = _this select 5;
_projectile = _this select 6;

private ["_gunner", "_turret"];

_gunner = [_vehicle, _weapon] call EFUNC(common,getGunner);
_turret = [_gunner] call EFUNC(common,getTurretIndex);

// Exit if the unit isn't a player
if !([_gunner] call EFUNC(common,isPlayer)) exitWith {};

private ["_FCSMagazines", "_FCSElevation", "_offset"];

_FCSMagazines = _vehicle getVariable [(format ["%1_%2", QGVAR(Magazines), _turret]), []];
_FCSElevation = _vehicle getVariable format ["%1_%2", QGVAR(Elevation), _turret];

if !(_magazine in _FCSMagazines) exitWith {};

// GET ELEVATION OFFSET OF CURRENT MAGAZINE
_offset = 0;
{
    if (_x == _magazine) exitWith {
        _offset = _FCSElevation select _forEachIndex;
    };
} forEach _FCSMagazines;

// Correct velocity for weapons that have initVelocity
// @todo: Take into account negative initVelocities
_velocityCorrection = (vectorMagnitude velocity _projectile) -
                      getNumber (configFile >> "CfgMagazines" >> _magazine >> "initSpeed");

[_projectile, (_vehicle getVariable format ["%1_%2", QGVAR(Azimuth), _turret]), _offset, -_velocityCorrection] call EFUNC(common,changeProjectileDirection);

// Remove the platform velocity 
if( (vectorMagnitude velocity _vehicle) > 2) then {
    _sumVelocity = (velocity _projectile) vectorDiff (velocity _vehicle);
    _projectile setVelocity _sumVelocity;
};

// Air burst missile

// handle locally only
if (!local _gunner) exitWith {};

if (getNumber (configFile >> "CfgAmmo" >> _ammo >> QGVAR(Airburst)) == 1) then {
    private "_zeroing";
    _zeroing = _vehicle getVariable [format ["%1_%2", QGVAR(Distance), _turret], currentZeroing _vehicle];

    if (_zeroing < 50) exitWith {};
    if (_zeroing > 1500) exitWith {};

    [FUNC(handleAirBurstAmmunitionPFH), 0, [_vehicle, _projectile, _zeroing]] call CBA_fnc_addPerFrameHandler;
};