/**
 * Face
 * @param id
 * @param name
 * @param v0index
 * @param v1index
 * @param v2index
 * @param materialIndex
 * @param uvs [[v0uv (GameLib.Vector2), v1uv(GameLib.Vector2), v2uv(GameLib.Vector2)]]
 * @param color
 * @param vertexColors
 * @param vertexNormals
 * @param normal
 * @constructor
 */
GameLib.D3.API.Face = function(
	id,
	name,
	v0index,
	v1index,
	v2index,
	materialIndex,
	uvs,
	color,
	vertexColors,
	vertexNormals,
	normal
) {

	if (GameLib.Utils.UndefinedOrNull(id)) {
		id = GameLib.Utils.RandomId();
	}
	this.id = id;

	if (GameLib.Utils.UndefinedOrNull(name)) {
		name = 'Face ' + id;
	}
	this.name = name;

	if (GameLib.Utils.UndefinedOrNull(v0index)) {
		v0index = -1;
	}
	this.v0index = v0index;

	if (GameLib.Utils.UndefinedOrNull(v1index)) {
		v1index = -1;
	}
	this.v1index = v1index;

	if (GameLib.Utils.UndefinedOrNull(v2index)) {
		v2index = -1;
	}
	this.v2index = v2index;

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

	if (GameLib.Utils.UndefinedOrNull(uvs)) {
		uvs = [[]];
	}
	this.uvs = uvs;

	if (GameLib.Utils.UndefinedOrNull(color)) {
		color = null;
	}
	this.color = color;

	if (GameLib.Utils.UndefinedOrNull(vertexColors)) {
		vertexColors = [];
	}
	this.vertexColors = vertexColors;

	if (GameLib.Utils.UndefinedOrNull(vertexNormals)) {
		vertexNormals = [];
	}
	this.vertexNormals = vertexNormals;

	if (GameLib.Utils.UndefinedOrNull(normal)) {
		normal = null;
	}
	this.normal = normal;
};

/**
 * We don't inherit from component - it makes the entitymanager too heavy - all faces end up in the register etc..
 */

// GameLib.D3.API.Face.prototype = Object.create(GameLib.Component.prototype);
// GameLib.D3.API.Face.prototype.constructor = GameLib.D3.API.Face;

/**
 * Returns an API Face from a data object
 * @constructor
 * @param objectFace
 */
GameLib.D3.API.Face.FromObject = function(objectFace) {

    var apiUvs = objectFace.uvs.reduce(

        function(result, uvArray, index) {

            result[index] = uvArray.reduce(
                function(uvResult, uv) {
                    uvResult.push(GameLib.API.Vector2.FromObject(uv));
                    return uvResult;
                },
                []
            );

            return result;
        },
        []
    );

    var apiVertexColors = objectFace.vertexColors.map(
        function(vertexColor) {
            return GameLib.API.Color.FromObject(vertexColor);
        }
    );

    var apiColor = null;
    if (objectFace.color) {
        apiColor = GameLib.API.Color.FromObject(objectFace.color);
    }

    var apiVertexNormals = objectFace.vertexNormals.map(
        function(vertexNormal) {
            return GameLib.API.Vector3.FromObject(vertexNormal);
        }
    );

    var apiNormal = null;
    if (objectFace.normal) {
        apiNormal = GameLib.API.Vector3.FromObject(objectFace.normal);
    }

    return new GameLib.D3.API.Face(
    	objectFace.id,
		objectFace.name,
		objectFace.v0index,
		objectFace.v1index,
		objectFace.v2index,
		objectFace.materialIndex,
        apiUvs,
        apiColor,
        apiVertexColors,
        apiVertexNormals,
        apiNormal
    );
};

/**
 * Clone a Face
 * @returns {GameLib.D3.API.Face}
 */
GameLib.D3.API.Face.prototype.clone = function(){
	return new GameLib.D3.API.Face(
		this.id,
		this.name,
		this.v0index,
		this.v1index,
		this.v2index,
		this.materialIndex,
		this.uvs,
		this.color,
		this.vertexColors,
		this.vertexNormals,
		this.normal
	);

};

/**
 * Returns true if two triangles are equal (their vertex indices match in some order)
 * @param triangle
 * @returns {boolean}
 */
GameLib.D3.API.Face.prototype.equals = function(triangle) {
	return (
		(
			(this.v0index === triangle.v0index) &&
			(this.v1index === triangle.v1index) &&
			(this.v2index === triangle.v2index)
		)
		||
		(
			(this.v0index === triangle.v0index) &&
			(this.v1index === triangle.v2index) &&
			(this.v2index === triangle.v1index)
		)
		||
		(
			(this.v0index === triangle.v1index) &&
			(this.v1index === triangle.v0index) &&
			(this.v2index === triangle.v2index)
		)
		||
		(
			(this.v0index === triangle.v1index) &&
			(this.v1index === triangle.v2index) &&
			(this.v2index === triangle.v0index)
		)
		||
		(
			(this.v0index === triangle.v2index) &&
			(this.v1index === triangle.v0index) &&
			(this.v2index === triangle.v1index)
		)
		||
		(
			(this.v0index === triangle.v2index) &&
			(this.v1index === triangle.v1index) &&
			(this.v2index === triangle.v0index)
		)
	);
};