/**
 *
 * @param physics
 * @param apiShape
 * @param zValues
 * @param minValue
 * @param maxValue
 * @param elementSize
 * @constructor
 */
GameLib.D3.Shape.HeightMap = function (
	physics,
    apiShape,
    zValues,
	minValue,
	maxValue,
	elementSize
) {
    this.physics = physics;
    this.physics.isNotCannonThrow();

    if (GameLib.Utils.UndefinedOrNull(zValues)) {
        zValues = [10, 10, 10, 10, 10, 10, 10, 10, 10, 10];
    }
    this.zValues = zValues;

    if (GameLib.Utils.UndefinedOrNull(minValue)) {
        minValue = 0;
    }
    this.minValue = minValue;

    if (GameLib.Utils.UndefinedOrNull(maxValue)) {
        maxValue = 10;
    }
    this.maxValue = maxValue;

    if (GameLib.Utils.UndefinedOrNull(elementSize)) {
        elementSize = 1;
    }
    this.elementSize = elementSize;

    GameLib.D3.Shape.call(
        this,
        this.physics,
        apiShape
    );
};

GameLib.D3.Shape.HeightMap.prototype = Object.create(GameLib.D3.Shape.prototype);
GameLib.D3.Shape.HeightMap.prototype.constructor = GameLib.D3.Shape.HeightMap;

/**
 * Create instance
 * @returns {GameLib.D3.Shape.HeightMap}
 */
GameLib.D3.Shape.HeightMap.prototype.createInstance = function() {

	var instance = new CANNON.Heightfield(
		this.zValues,
		{
			minValue : this.minValue,
			maxValue : this.maxValue,
			elemSize : this.elementSize
		}
	);

    return instance;
};

/**
 * Update instance
 */
GameLib.D3.Shape.HeightMap.prototype.updateInstance = function() {
    this.instance.data     = this.zValues;
    this.instance.minValue = this.minValue;
    this.instance.maxValue = this.maxValue;
    this.instance.elemSize = this.elemSize;
    this.instance.update();
	// this.instance.updateBoundingSphereRadius();
	// this.instance.updateMaxValue();
	// this.instance.updateMinValue();
};


GameLib.D3.Shape.HeightMap.prototype.toApiObject = function() {
    var apiShape = GameLib.D3.Shape.prototype.toApiObject.call(this);
    apiShape.zValues = this.zValues;
    apiShape.minValue = this.minValue;
    apiShape.maxValue = this.maxValue;
    apiShape.elemSize = this.elemSize;
    return apiShape;
};

GameLib.D3.Shape.HeightMap.prototype.setFromMesh = function() {

    if (this.parentMesh === null) {
        console.log('select a mesh first');
        return;
    }

    if (!this.parentMesh.isHeightMap) {
        console.log('not a heightmap mesh');
        return;
    }

    this.zValues = this.parentMesh.getHeightData();

    this.minValue = 0;
    this.maxValue = (this.parentMesh.widthSegments + 1) * (this.parentMesh.heightSegments + 1);

    this.updateInstance();
};

GameLib.D3.Shape.HeightMap.FromObject = function(physics, objectShape) {

    var apiShape = GameLib.D3.API.Shape.FromObject(objectShape);

    return new GameLib.D3.Shape.HeightMap(
        physics,
        apiShape,
        objectShape.zValues,
        objectShape.minValue,
        objectShape.maxValue,
        objectShape.elemSize
    );
};