/*
 * Author: BaerMitUmlaut
 * Server PerFrameHandler during fast roping.
 *
 * Arguments:
 * 0: PFH arguments <ARRAY>
 * 1: PFH handle <OBJECT>
 *
 * Return Value:
 * None
 *
 * Example:
 * [[_unit, _vehicle, _rope, _ropeIndex], 0] call ace_fastroping_fnc_fastRopeServerPFH
 *
 * Public: No
 */

#include "script_component.hpp"
params ["_arguments", "_pfhHandle"];
_arguments params ["_unit", "_vehicle", "_rope", "_ropeIndex", "_hasBeenAttached"];
_rope params ["_attachmentPoint", "_ropeTop", "_ropeBottom", "_dummy", "_hook"];

//Wait until the unit is actually outside of the helicopter
if (vehicle _unit != _unit) exitWith {};

//Prevent teleport if hook has been deleted due to rope cut
if (isNull _hook) exitWith {
    detach _unit; //Does not matter if unit was not attached yet
    [_pfhHandle] call CBA_fnc_removePerFrameHandler;
};

//Start fast roping
if (getMass _dummy != 80) exitWith {
    //Fix for twitchyness
    _dummy setMass 80;
    _dummy setCenterOfMass [0, 0, -2];
    private _origin = getPosASL _hook;
    _dummy setPosASL (_origin vectorAdd [0, 0, -2]);
    _dummy setVectorUp [0, 0, 1];

    ropeUnwind [_ropeTop, 6, 34.5];
    ropeUnwind [_ropeBottom, 6, 0.5];
};

//Check if the player has been attached to the rope yet
if (!_hasBeenAttached && {!(isNull attachedTo _unit)}) then {
    _hasBeenAttached = true;
    _arguments set [4, true];
};

//Exit when the unit has been detached and is falling (rope broke, heli flew too fast, etc.)
//Make sure this isn't executed before the unit is actually fastroping
if (_hasBeenAttached && {isNull attachedTo _unit}) exitWith {
    [_pfhHandle] call CBA_fnc_removePerFrameHandler;
};

//Setting the velocity manually to reduce twitching
_dummy setVelocity [0,0,-6];

//Check if fast rope is finished
if (
    ((getPos _unit select 2) < 0.2)
    || {ropeLength _ropeTop == 34.5}
    || {vectorMagnitude (velocity _vehicle) > 5}
    || {!([_unit] call EFUNC(common,isAwake))}
) exitWith {
    detach _unit;

    //Reset rope
    deleteVehicle _ropeTop;
    deleteVehicle _ropeBottom;

    private _origin = getPosASL _hook;
    _dummy setPosASL (_origin vectorAdd [0, 0, -1]);

    //Restore original mass and center of mass
    _dummy setMass 40;
    _dummy setCenterOfMass [0.000143227,0.00105986,-0.246147];

    _ropeTop = ropeCreate [_dummy, [0, 0, 0], _hook, [0, 0, 0], 0.5];
    _ropeBottom = ropeCreate [_dummy, [0, 0, 0], 34.5];

    _ropeTop addEventHandler ["RopeBreak", {[_this, "top"] call FUNC(onRopeBreak)}];
    _ropeBottom addEventHandler ["RopeBreak", {[_this, "bottom"] call FUNC(onRopeBreak)}];

    //Update deployedRopes array
    private _deployedRopes = _vehicle getVariable [QGVAR(deployedRopes), []];
    _deployedRopes set [_ropeIndex, [_attachmentPoint, _ropeTop, _ropeBottom, _dummy, _hook, false, false]];
    _vehicle setVariable [QGVAR(deployedRopes), _deployedRopes, true];

    [_pfhHandle] call CBA_fnc_removePerFrameHandler;
};