params ["_heli"];

private _currentEfs = _heli getVariable ["efs", objNull];
if (!isNull _currentEfs) exitWith {
	_heli vehicleChat "Emergency Floating System already deployed.";
};

sleep 1;
_heli vehicleChat "Deploying Emergency Floating System!";
_heli say3D "EFS";
_heli animate ["EFS_Cover_Hide", 1];
_heli animate ["EFS_Hide", 1];

private _efs = "BRAF_Esquilo_EFS" createVehicle [0, 0, 0];
_efs setDir (getDir _heli);
_efs setPosASL (_heli modelToWorld [0, 0, 0]);
_efs attachTo [_heli, [0, 0, 0], "efs_spawn"];

_heli setVariable ["efs", _efs, true];
_heli setVariable ["braf_efs_deployed", true, true];

if ((_heli getVariable ["braf_efs_engine_lock_eh", -1]) < 0) then {
	private _engineLockEh = _heli addEventHandler ["Engine", {
		params ["_vehicle", "_engineState"];

		if (_engineState && {_vehicle getVariable ["braf_efs_water_landed", false]}) then {
			_vehicle engineOn false;
			_vehicle vehicleChat "Engine restart disabled after EFS water landing.";
		};
	}];

	_heli setVariable ["braf_efs_engine_lock_eh", _engineLockEh];
};

if (!(_heli getVariable ["braf_efs_water_monitor", false])) then {
	_heli setVariable ["braf_efs_water_monitor", true, true];

	[_heli] spawn {
		params ["_heli"];

		private _waterContact = false;
		while {
			!isNull _heli
			&& {_heli getVariable ["braf_efs_deployed", false]}
			&& {!(_heli getVariable ["braf_efs_water_landed", false])}
			&& {!_waterContact}
		} do {
			private _efsProbe = _heli getVariable ["efs", objNull];
			private _waterProbeASL = if (isNull _efsProbe) then {getPosASL _heli} else {getPosASL _efsProbe};
			_waterContact = (surfaceIsWater (getPosWorld _heli))
				&& {(isTouchingGround _heli) || {(_waterProbeASL select 2) < 0.75}};

			sleep 0.25;
		};

		_heli setVariable ["braf_efs_water_monitor", false, true];

		if (isNull _heli || {!_waterContact}) exitWith {};

		_heli setVariable ["braf_efs_water_landed", true, true];
		_heli engineOn false;
		_heli vehicleChat "EFS water landing complete. Engine restart disabled.";

		while {!isNull _heli && {_heli getVariable ["braf_efs_water_landed", false]}} do {
			if (isEngineOn _heli) then {
				_heli engineOn false;
			};

			sleep 0.5;
		};
	};
};