inventory.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef DRAGONS_INVENTORY_H
#define DRAGONS_INVENTORY_H

#include "common/system.h"

namespace Dragons {

class Actor;
class ActorManager;
class BackgroundResourceLoader;
class Background;
class Bag;
class DragonINIResource;

#define DRAGONS_MAX_INVENTORY_ITEMS 0x29

#define ACTOR_INVENTORY_OFFSET 0x17

enum InventoryState {
    Closed = 0,
    InventoryOpen = 1,
    InventionBookOpen = 2
};

class Inventory {
public:
    InventoryState _previousState;
private:
    DragonsEngine *_vm;
    int32 _sequenceId;
    int16 _screenPositionIndex;
    Actor *_actor;
    InventoryState _state;
    Bag *_bag;

    void (*_inventionBookPrevSceneUpdateFunc)();
    uint16 _inventionBookPrevSceneId;
    uint16 _inventionBookPrevFlickerINISceneId;
    Common::Point _inventionBookPrevFlickerINIPosition;

    uint16 _inventoryItemTbl[DRAGONS_MAX_INVENTORY_ITEMS];

public:
    Inventory(DragonsEngine *vm);

    void init(ActorManager *actorManager, BackgroundResourceLoader *backgroundResourceLoader, Bag *bag, DragonINIResource *dragonIniResource);
    void loadScene(uint32 sceneId);
    bool isActorSet() { return true; }

    int32 getSequenceId() {
        return _sequenceId;
    }
    void setActorSequenceId(int32 sequenceId);
    void updateActorSequenceId(int32 sequenceId);
    void resetSequenceId();

    InventoryState getState() { return _state; }
    void setState(InventoryState newState) { _state = newState; }
    void setPreviousState();

    int16 getPositionIndex() { return _screenPositionIndex; }
    Common::Point getPosition();

    bool isOpen() {
        return _state != Closed;
    }

    void close() { _state = Closed; }

    void updateVisibility();
    void setActorFlag400();
    void clearActorFlag400();
    void setPriority(uint16 priority);

    void openInventory();
    void closeInventory();

    void draw();
    uint16 getIniAtPosition(int16 x, int16 y);
    void loadInventoryItemsFromSave();

    void openInventionBook();
    void closeInventionBook();

    bool addItem(uint16 iniId);
    bool addItemIfPositionIsEmpty(uint16 iniId, uint16 x, uint16 y);
    void replaceItem(uint16 existingIniId, uint16 newIniId);
    bool clearItem(uint16 iniId);
    bool hasItem(uint16 iniId);

    Actor *getInventoryItemActor(uint16 iniId);
    void inventoryMissing();

private:
    void setPositionFromSceneId(uint32 sceneId);
    void animateBagIn();
    void animateBagOut();
};

} // End of namespace Dragons

#endif //DRAGONS_INVENTORY_H