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Bullet implementation for the physics module.
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//        This file is part of the Yildiz-Online project, licenced under the MIT License
//        (MIT)
//
//        Copyright (c) 2016 Grégory Van den Borre
//
//        More infos available: http://yildiz.bitbucket.org
//
//        Permission is hereby granted, free of charge, to any person obtaining a copy
//        of this software and associated documentation files (the "Software"), to deal
//        in the Software without restriction, including without limitation the rights
//        to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//        copies of the Software, and to permit persons to whom the Software is
//        furnished to do so, subject to the following conditions:
//
//        The above copyright notice and this permission notice shall be included in all
//        copies or substantial portions of the Software.
//
//        THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//        IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//        FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//        AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//        LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//        OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//        SOFTWARE.

package be.yildiz.module.physics.bullet;

import be.yildiz.common.id.EntityId;
import be.yildiz.common.nativeresources.Native;
import be.yildiz.common.nativeresources.NativePointer;
import be.yildiz.common.vector.Point3D;
import be.yildiz.module.physics.AbstractMovableObject;
import be.yildiz.module.physics.GhostObject;
import jni.BulletGhostObjectNative;
import lombok.Getter;

/**
 * A ghost object is meant only to be aware of objects colliding it, it is useful as trigger for example.
 *
 * @author Grégory Van den Borre
 */
final class BulletGhostObject extends AbstractMovableObject implements GhostObject, Native {

    /**
     * Pointer address to the associated native object.
     */
    private final NativePointer pointer;

    /**
     * Pointer address to the world containing this object.
     */
    private final NativePointer worldPointer;

    /**
     * Contains the native calls.
     */
    private final BulletGhostObjectNative ghostNative = new BulletGhostObjectNative();

    @Getter
    private final EntityId id;

    private boolean deleted;

    /**
     * Create a new instance.
     *
     * @param id             Unique identifier.
     * @param pointerAddress Native address.
     * @param world          World containing this object native address.
     * @param position       Object position when created.
     */
    BulletGhostObject(final EntityId id, final NativePointer pointerAddress, final NativePointer world, final Point3D position) {
        super(position);
        this.id = id;
        this.pointer = pointerAddress;
        this.worldPointer = world;
    }

    @Override
    public NativePointer getPointer() {
        this.checkDeleted();
        return this.pointer;
    }

    @Override
    public void delete() {
        this.deleted = true;
        this.ghostNative.delete(this.pointer.address, this.worldPointer.address);
    }

    @Override
    protected void setPositionImpl(final Point3D pos) {
        this.checkDeleted();
        this.ghostNative.setPosition(this.pointer.address, pos.x, pos.y, pos.z);
    }

    protected final void checkDeleted() {
        if(this.deleted) {
            throw new IllegalArgumentException("Trying to access native pointer after it has been deleted.");
        }
    }
}