/*!
    \file weapon.h
  *  a weapon that a player can use

    A Player has a list of weapons, that can be choosen to shoot projectiles
    (projectiles.{cc,h}) at ennemies. These weapons can be shooted sequentially
    or (if able) combined. Therefore you can choose the weapon mode = choose
    a weapon.

    A weapon is characterized by:
     o firing-rate: the initial firing rate of a weapon (1/s = Herz)
     o slowdown-factor: this is a factor d: exp(-d*x), d is element of all positive R. it determines how fast the firing-rate will slow down. if no slowdown: d=0, the bigger d is, the faster the weapon will slow down!
     o energy-consumption: this determines the energy that has to be used to produce this projectile = costs per projectile

    Furthermore there are some other attributes, that will help to represent a firing
    weapon in this world:
     o sound file/ressource: this is a pointer to the sound-file/ressource. however it may be represented
     o shooting animation


     a player defines one or more weapon configurations. a player has got one to eight
     weapon slots: places where weapons can be attached to. a weapon configuration
     is a matching between weapons and slots.
     Since its clear how many weapons a player will have, there is no list of weapons:
     its hard coded and limited to 8 slots and 4 configs. More would be a waste of
     memory and time you need to customize and change to a weapon config...
 */

#include "base_object.h"


// FORWARD DECLARATION
class Weapon;
class Crosshair;
template <class T> class tAnimation;

#define    WM_MAX_SLOTS            8                   //!< How many slots the WeaponManager has at its max
#define    WM_MAX_CONFIGS          4                   //!< The maximum number of predefined Configurations
#define    WM_MAX_LOADED_WEAPONS   20                  //!< The

//! this is an identifier for the weapon config
typedef enum
{
  WM_CONFIG0           = 0,
  WM_CONFIG1           = 1,
  WM_CONFIG2           = 2,
  WM_CONFIG3           = 3,

  WM_CONFIGCOUNT       = 4
} WM_CONFIG;

//! this is an identifier for the slot. there are up to 8 weapon slots -> this means there can't be more than 8 weapons at the same time
typedef enum
{
  WM_SLOT0              = 0,
  WM_SLOT1              = 1,
  WM_SLOT2              = 2,
  WM_SLOT3              = 3,
  WM_SLOT4              = 4,
  WM_SLOT5              = 5,
  WM_SLOT6              = 6,
  WM_SLOT7              = 7,

  WM_SLOT_COUNT         = 8,

  WM_FREE_SLOT          = -1
} WM_SLOT;

typedef enum
{
  WM_SLOTC_DIRECTIONAL   = 1,
  WM_SLOTC_TURRET        = 2,
  WM_SLOTC_ALLKINDS      = 3,

  WM_SLOTC_FORWARD       = 4,
  WM_SLOTC_BACKWARD      = 8,
  WM_SLOTC_LEFT          = 16,
  WM_SLOTC_RIGHT         = 32,
  WM_SLOTC_ALLDIRS       = 60,

  WM_SLOTC_ALL           = 63,
} WM_SlotCapability;

typedef struct WM_Slot
{
  int           number;
  long          capability;

  Weapon*       currentWeapon;
  Weapon*       nextWeapon;
};

//! this is a weapon Configuration: it has up to 8 slots
typedef struct
{
  bool           bUsed;                       //!< is set to true, if this configuration is
  Weapon*        slots[WM_MAX_SLOTS];
} weaponConfig;


class WeaponManager : public BaseObject {
  public:
    WeaponManager(int slotCount);
    WeaponManager(const TiXmlElement* root);
    ~WeaponManager();

    void init();
    void loadParams(const TiXmlElement* root);
    void loadWeapons(const TiXmlElement* root);

    void setSlotCount(int slotCount);

    void addWeapon(Weapon* weapon, int configID = WM_CONFIG0, int slotID = WM_FREE_SLOT);
    void removeWeapon(Weapon* weapon, int configID = WM_CONFIG0);
    void nextWeaponConf();

    void fire();
    void tick(float dt);
    void draw();

  private:
    int getNextFreeSlot(int configID);

  private:
    Crosshair*              crosshair;               //!< an aim.
    tAnimation<Crosshair>*  crossHairSizeAnim;       //!< An animation for the crosshair (scaling)

    int                     slotCount;               //!< number of weapon slots a ship has
    int                     currConfID;              //!< the currently selected config
    weaponConfig            configs[4];              //!< a list of four configurations

    Weapon*                 availiableWeapons[WM_MAX_LOADED_WEAPONS];
};