/*
 * Author: commy2
 *
 * Is the unit able to enter the vehicle in the given position?
 *
 * Arguments:
 * 0: Unit to enter the vehicle (Object)
 * 1: The vehicle to be entered (Object)
 * 2: Position. Can be "Driver", "Pilot", "Gunner", "Commander", "Copilot", "Turret", "FFV", "Codriver" or "Cargo" (String)
 * 3: Check current distance to vehicles memory point? (Bool, optional default: false)
 * 4: Index. "Turret", "FFV", "Codriver" and "Cargo" support this optional parameter. Which position should be taken.
 *    Note: This index is diffrent from Armas "cargoIndex". (Number, optional default: next free index)
 *
 * Return Value:
 * Nothing
 */
#include "script_component.hpp"

#define CANGETINDRIVER      (isNull (driver _vehicle)             || {!alive driver _vehicle})               && {!lockedDriver _vehicle}           && {getNumber (_config >> "isUav") != 1}
#define CANGETINTURRETINDEX (isNull (_vehicle turretUnit _turret) || {!alive (_vehicle turretUnit _turret)}) && {!(_vehicle lockedTurret _turret)} && {getNumber (_config >> "isUav") != 1}

private ["_unit", "_vehicle", "_position", "_checkDistance", "_index"];

_this resize 5;

_unit = _this select 0;
_vehicle = _this select 1;
_position = toLower (_this select 2);
_checkDistance = _this select 3;
_index = _this select 4;  // optional, please don't use

if (isNil "_checkDistance") then {_checkDistance = false};
if (isNil "_index") then {_index = -1};

// general
if (!alive _vehicle || {locked _vehicle > 1}) exitWith {false};

private ["_config", "_turret", "_radius", "_selectionPosition", "_selectionPosition2", "_enemiesInVehicle", "_return"];

_config = configFile >> "CfgVehicles" >> typeOf _vehicle;
_turret = [];

_radius = 0;

_enemiesInVehicle = false;   //Possible Side Restriction
{
  if (side _unit getFriend side _x < 0.6) exitWith {_enemiesInVehicle = true};
} forEach crew _vehicle;

_return = false;
switch (_position) do {
  case "driver" : {
    _radius = getNumber (_config >> "getInRadius");
    _selectionPosition = _vehicle selectionPosition (getText (_config >> "memoryPointsGetInDriver"));

    if (_vehicle isKindOf "Tank") then {
      _selectionPosition2 = [-(_selectionPosition select 0), _selectionPosition select 1, _selectionPosition select 2];
    };

    _return = CANGETINDRIVER;
  };

  case "pilot" : {
    _radius = getNumber (_config >> "getInRadius");
    _selectionPosition = _vehicle selectionPosition (getText (_config >> "memoryPointsGetInDriver"));

    _return = CANGETINDRIVER;
  };

  case "gunner" : {
    private "_turretConfig";
    _turret = [_vehicle] call FUNC(getTurretGunner);
    if (_turret isEqualTo []) exitWith {false};

    _turretConfig = [_config, _turret] call FUNC(getTurretConfigPath);

    _radius = getNumber (_config >> "getInRadius");
    _selectionPosition = _vehicle selectionPosition (getText (_turretConfig >> "memoryPointsGetInGunner"));

    _return = CANGETINTURRETINDEX
  };

  case "commander" : {
    private "_turretConfig";
    _turret = [_vehicle] call FUNC(getTurretCommander);
    if (_turret isEqualTo []) exitWith {false};

    _turretConfig = [_config, _turret] call FUNC(getTurretConfigPath);

    _radius = getNumber (_config >> "getInRadius");
    _selectionPosition = _vehicle selectionPosition (getText (_turretConfig >> "memoryPointsGetInGunner"));

    _return = CANGETINTURRETINDEX
  };

  case "copilot" : {
    private "_turretConfig";
    _turret = [_vehicle] call FUNC(getTurretCopilot);
    if (_turret isEqualTo []) exitWith {false};

    _turretConfig = [_config, _turret] call FUNC(getTurretConfigPath);

    _radius = getNumber (_config >> "getInRadius");
    _selectionPosition = _vehicle selectionPosition (getText (_turretConfig >> "memoryPointsGetInGunner"));

    _return = CANGETINTURRETINDEX
  };

  case "turret" : {
    private ["_turrets", "_turretConfig"];
    _turrets = [_vehicle] call FUNC(getTurretsOther);

    if (_index != -1 && {_turret = _turrets select _index;
      CANGETINTURRETINDEX
    }) then {
      _turretConfig = [_config, _turret] call FUNC(getTurretConfigPath);

      _radius = getNumber (_config >> "getInRadius");
      _selectionPosition = _vehicle selectionPosition (getText (_turretConfig >> "memoryPointsGetInGunner"));

      _return = true
    } else {
      for "_index" from 0 to (count _turrets - 1) do {
        _turret = _turrets select _index;
        if (CANGETINTURRETINDEX) exitWith {
          _turretConfig = [_config, _turret] call FUNC(getTurretConfigPath);

          _radius = getNumber (_config >> "getInRadius");
          _selectionPosition = _vehicle selectionPosition (getText (_turretConfig >> "memoryPointsGetInGunner"));

          _return = true
        };
      };
    };
  };

  case "ffv" : {
    private ["_turrets", "_turretConfig"];
    _turrets = [_vehicle] call FUNC(getTurretsFFV);

    if (_index != -1 && {_turret = _turrets select _index;
      CANGETINTURRETINDEX
    }) then {
      _turretConfig = [_config, _turret] call FUNC(getTurretConfigPath);

      _radius = getNumber (_config >> "getInRadius");
      _selectionPosition = _vehicle selectionPosition (getText (_turretConfig >> "memoryPointsGetInGunner"));

      _return = true
    } else {
      for "_index" from 0 to (count _turrets - 1) do {
        _turret = _turrets select _index;
        if (CANGETINTURRETINDEX) exitWith {
          _turretConfig = [_config, _turret] call FUNC(getTurretConfigPath);

          _radius = getNumber (_config >> "getInRadius");
          _selectionPosition = _vehicle selectionPosition (getText (_turretConfig >> "memoryPointsGetInGunner"));

          _return = true
        };
      };
    };
  };

  case "codriver" : {
    private "_positions";
    _positions = [typeOf _vehicle] call FUNC(getVehicleCodriver);

    {
      if (alive _x) then {_positions deleteAt (_positions find (_vehicle getCargoIndex _x))};
    } forEach crew _vehicle;

    if (_index != -1 && {_index in _positions}) then {
      _radius = getNumber (_config >> "getInRadius");
      _selectionPosition = _vehicle selectionPosition (getText (_config >> "memoryPointsGetInCargo"));

      if (_vehicle isKindOf "Car" && {!(_vehicle isKindOf "Wheeled_APC_F")}) then {
        _selectionPosition2 = _vehicle selectionPosition (getText (_config >> "memoryPointsGetInDriver"));
        _selectionPosition2 set [0, -(_selectionPosition2 select 0)];
      };

      _return = true
    } else {

      _index = _positions select 0;
      if (!isNil "_index") then {
        _radius = getNumber (_config >> "getInRadius");
        _selectionPosition = _vehicle selectionPosition (getText (_config >> "memoryPointsGetInCargo"));

        if (_vehicle isKindOf "Car" && {!(_vehicle isKindOf "Wheeled_APC_F")}) then {
          _selectionPosition2 = _vehicle selectionPosition (getText (_config >> "memoryPointsGetInDriver"));
          _selectionPosition2 set [0, -(_selectionPosition2 select 0)];
        };

        _return = true
      };
    };
  };

  case "cargo" : {
    private "_positions";
    _positions = [typeOf _vehicle] call FUNC(getVehicleCargo);

    {
      if (alive _x) then {_positions deleteAt (_positions find (_vehicle getCargoIndex _x))};
    } forEach crew _vehicle;

    if (_index != -1 && {_index in _positions}) then {
      _radius = getNumber (_config >> "getInRadius");
      _selectionPosition = _vehicle selectionPosition (getText (_config >> "memoryPointsGetInCargo"));

      if (_vehicle isKindOf "Car" && {!(_vehicle isKindOf "Wheeled_APC_F")}) then {
        _selectionPosition2 = _vehicle selectionPosition (getText (_config >> "memoryPointsGetInDriver"));
        _selectionPosition2 set [0, -(_selectionPosition2 select 0)];
      };

      _return = true
    } else {

      _index = _positions select 0;
      if (!isNil "_index") then {
        _radius = getNumber (_config >> "getInRadius");
        _selectionPosition = _vehicle selectionPosition (getText (_config >> "memoryPointsGetInCargo"));

        if (_vehicle isKindOf "Car" && {!(_vehicle isKindOf "Wheeled_APC_F")}) then {
          _selectionPosition2 = _vehicle selectionPosition (getText (_config >> "memoryPointsGetInDriver"));
          _selectionPosition2 set [0, -(_selectionPosition2 select 0)];
        };

        _return = true
      };
    };
  };

  default {};
};

private "_fnc_isInRange";
_fnc_isInRange = {
  if (_radius == 0) exitWith {true};

  private ["_unitPosition", "_distance"];
  _unitPosition = getPos _unit;

  _distance = _unitPosition distance (_vehicle modelToWorld _selectionPosition);

  if (!isNil "_selectionPosition2") then {
    _distance = _distance min (_unitPosition distance (_vehicle modelToWorld _selectionPosition2));
  };

  _distance < _radius
};

// if you want into the cargo and you can't, then check ffv turrets aswell
if (_position == "cargo") exitWith {
  if (_return && {!_checkDistance || {_vehicle == vehicle _unit} || _fnc_isInRange}) then {true} else {
    [_unit, _vehicle, "ffv", _checkDistance] call FUNC(canGetInPosition);
  }
};

_return && {!_checkDistance || {_vehicle == vehicle _unit} || _fnc_isInRange}

//_enemiesInVehicle