//
//  SuperTuxKart - a fun racing game with go-kart
//  Copyright (C) 2010-2015 SuperTuxKart-Team
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the GNU General Public License
//  as published by the Free Software Foundation; either version 3
//  of the License, or (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

#ifndef DEVICE_MANAGER_HPP
#define DEVICE_MANAGER_HPP

#include "input/gamepad_config.hpp"
#include "input/input_manager.hpp"
#include "input/keyboard_config.hpp"
#include "states_screens/state_manager.hpp"
#include "utils/no_copy.hpp"
#include "utils/ptr_vector.hpp"

#include <irrArray.h>
#include <IEventReceiver.h>
using namespace irr;

class DeviceConfig;
class InputDevice;
class GamePadDevice;
class KeyboardDevice;
class MultitouchDevice;


enum PlayerAssignMode
{
    NO_ASSIGN,  //!< react to all devices
    DETECT_NEW, //!< notify the manager when an inactive device is being asked to activate with fire
    ASSIGN      //!< only react to assigned devices
};

/**
 * \brief This class holds the list of all known devices (ands their configurations), as well as the
 * list of currently plugged (used) devices.
 * It thus takes care of finding to which device any given
 * input belongs, and what action each keypress is bound to, if any (and, since each device is
 * associated to a player, it also finds which player triggered this action)
 * These input mapping capabilities should *only* be used through the InputManager, not directly.
 *
 * The device manager starts in "no-assign" mode, which means no input configuration is associated
 * to any player. So all devices will react. This is used in menus before player set-up is done.
 * Switching back to no-assign mode will also clear anything in devices that was associated with
 * players in assign mode.
 *
 * \ingroup input
 */
class DeviceManager: public NoCopy
{
private:

    PtrVector<KeyboardDevice, HOLD>    m_keyboards;
    PtrVector<GamePadDevice, HOLD>     m_gamepads;
    PtrVector<KeyboardConfig, HOLD>    m_keyboard_configs;
    PtrVector<GamepadConfig, HOLD>     m_gamepad_configs;
    MultitouchDevice*                  m_multitouch_device;

    InputDevice*                       m_latest_used_device;
    PlayerAssignMode                   m_assign_mode;


    /** Will be non-null in single-player mode */
    StateManager::ActivePlayer* m_single_player;

    /** If this is flag is set the next fire event (if the fire key is not
     *  mapped to anything else) will be mapped to 'select'. This is used
     *  in the kart select GUI to support the old way of adding players by
     *  pressing fire. */
    bool m_map_fire_to_select;


    InputDevice *mapGamepadInput( Input::InputType type, int deviceID,
                                  int btnID, int axisDir,
                                  int* value /* inout */,
                                  InputManager::InputDriverMode mode,
                                  StateManager::ActivePlayer **player /* out */,
                                  PlayerAction *action /* out */);
    InputDevice *mapKeyboardInput(int button_id,
                                  InputManager::InputDriverMode mode,
                                  StateManager::ActivePlayer **player /* out */,
                                  PlayerAction *action /* out */);

    bool load();
    void shutdown();

public:


    DeviceManager();
    ~DeviceManager();

    // ---- Assign mode ----
    PlayerAssignMode    getAssignMode() const               { return m_assign_mode; }
    void                setAssignMode(const PlayerAssignMode assignMode);

    // ---- Gamepads ----
    void addGamepad(GamePadDevice* d);
    int getGamePadAmount() const                            { return m_gamepads.size(); }
    int getGamePadConfigAmount() const                      { return m_gamepad_configs.size(); }
    GamePadDevice*      getGamePad(const int i)             { return m_gamepads.get(i); }
    GamepadConfig*      getGamepadConfig(const int i)       { return m_gamepad_configs.get(i); }
    GamePadDevice*      getGamePadFromIrrID(const int i);
    void                clearGamepads();
    /** Returns the keyboard that has a binding for this button, or NULL if none */
    bool                getConfigForGamepad(const int sdl_id, 
                                            const std::string& name,
                                            GamepadConfig **config);

    // ---- Keyboard(s) ----
    void addEmptyKeyboard();
    void addKeyboard(KeyboardDevice* d);
    void                clearKeyboard();
    int                 getKeyboardAmount()                 { return m_keyboards.size(); }
    int                 getActiveKeyboardAmount()
    {
        int active = 0;
        for (unsigned int i=0;i<m_keyboard_configs.size();i++)
        {
            if (m_keyboard_configs[i].isEnabled()) active++;
        }
        return active;
    }
    int                 getKeyboardConfigAmount() const     { return m_keyboard_configs.size(); }
    KeyboardDevice*     getKeyboard(const int i)            { return m_keyboards.get(i); }
    KeyboardConfig*     getKeyboardConfig(const int i)      { return m_keyboard_configs.get(i); }
    KeyboardDevice*     getKeyboardFromBtnID(const int btnID);

    // ---- Multitouch device ----
    MultitouchDevice*   getMultitouchDevice()    { return m_multitouch_device; }
    void                clearMultitouchDevices();
    void                updateMultitouchDevice();


    /**
      * \brief Delete the given config and removes DeviceManager references to it.
      */
    bool deleteConfig(DeviceConfig* config);

    /** Given some input, finds to which device it belongs and, using the corresponding device object,
      * maps this input to the corresponding player and game action.
      *
      * \return false if player/action could not be set.
      * \note   Special case : can return 'true' but set action to PA_BEFORE_FIRST if the input was used but
      *         is not associated to an action and a player
      *
      * \param mode used to determine whether to map game actions or menu actions
      */
    bool translateInput( Input::InputType type,
                         int deviceID,
                         int btnID,
                         int axisDir,
                         int *value /* inout */,
                         InputManager::InputDriverMode mode,
                         StateManager::ActivePlayer** player /* out */,
                         PlayerAction* action /* out */ );

    void                clearLatestUsedDevice();
    InputDevice*        getLatestUsedDevice();
    bool initialize();
    void save();

    // ------------------------------------------------------------------------
    /** Returns the active player if there is only a single local player. It
     *  returns NULL if multiplayer is active. */
    StateManager::ActivePlayer* getSinglePlayer()  { return m_single_player; }
    // ------------------------------------------------------------------------
    /** Sets the ActivePlayer if there is only a single local player. p must
     *  be NULL in case of splitscreen. A single player will receive events
     *  from all connected devices. This allows for example a single player
     *  to select a kart with the keyboard, but then use a gamepad for
     *  the actual racing. In splitscreen each player will only receive
     *  events from the device used to connect in the kart selection screen. */
    void setSinglePlayer(StateManager::ActivePlayer* p)
    {
        m_single_player = p; 
    }   // setSinglePlayer
    // ------------------------------------------------------------------------
    /** Sets or reset the 'map fire to select' option.
     */
    void mapFireToSelect(bool v) {m_map_fire_to_select = v; }

};   // DeviceManager


#endif