/**
 * Mesh Superset - The apiMesh properties get moved into the Mesh object itself, and then the instance is created
 * @param graphics GameLib.D3.Graphics
 * @param apiMesh GameLib.D3.API.Mesh
 * @param width
 * @param height
 * @param widthSegments
 * @param heightSegments
 * @constructor
 */
GameLib.D3.Mesh.Plane = function (
    graphics,
    apiMesh,
    width,
    height,
    widthSegments,
    heightSegments
) {
    this.graphics = graphics;
    this.graphics.isNotThreeThrow();

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

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

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

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

    GameLib.D3.Mesh.call(
        this,
        this.graphics,
        apiMesh
    );
};

GameLib.D3.Mesh.Plane.prototype = Object.create(GameLib.D3.Mesh.prototype);
GameLib.D3.Mesh.Plane.prototype.constructor = GameLib.D3.Mesh.Plane;


GameLib.D3.Mesh.Plane.prototype.createInstance = function() {

    var geometry = new THREE.PlaneGeometry(
        this.width,
        this.height,
        this.widthSegments,
        this.heightSegments
    );

    /**
     * If this geometry is coming from the database, apply the vertex data
     */
    if (this.vertices.length > 0) {
        this.applyVertexDataToInstance(geometry);
    } else {
        this.updateVerticesFromGeometryInstance(geometry);
    }

    var materialInstances = this.materials.reduce(
        function(result, material) {
            result.push(material.instance);
            return result;
        },
        []
    );

    var instance = new THREE.Mesh(geometry, materialInstances);

    instance.userData.width = this.width;
    instance.userData.height = this.height;
    instance.userData.widthSegments = this.widthSegments;
    instance.userData.heightSegments = this.heightSegments;

    this.createInstanceDefaults(instance);

    return instance;
};

GameLib.D3.Mesh.Plane.prototype.updateInstance = function() {

    if (
        this.instance.userData.width  !== this.width ||
        this.instance.userData.height !== this.height ||
        this.instance.userData.widthSegments !== this.widthSegments ||
        this.instance.userData.heightSegments !== this.heightSegments
    ) {
        var geometry = new THREE.PlaneGeometry(
            this.width,
            this.height,
            this.widthSegments,
            this.heightSegments
        );

        this.instance.geometry = geometry;

        this.updateVerticesFromGeometryInstance(geometry);
    }

    GameLib.D3.Mesh.prototype.updateInstance.call(this);
};

/**
 * Converts a GameLib.D3.Mesh to a GameLib.D3.API.Mesh
 * @returns {GameLib.D3.API.Mesh}
 */
GameLib.D3.Mesh.Plane.prototype.toApiObject = function() {

    var apiMesh = GameLib.D3.Mesh.prototype.toApiObject.call(this);

    apiMesh.width = this.width;
    apiMesh.height = this.height;
    apiMesh.widthSegments = this.widthSegments;
    apiMesh.heightSegments = this.heightSegments;

    return apiMesh;
};

/**
 * TODO fix all this weird loading shit
 * Converts a standard object mesh to a GameLib.D3.Mesh
 * @param graphics GameLib.D3.Graphics
 * @param objectMesh {Object}
 * @constructor
 */
GameLib.D3.Mesh.Plane.FromObject = function(graphics, objectMesh) {

    var apiMesh = GameLib.D3.API.Mesh.FromObject(objectMesh);

    return new GameLib.D3.Mesh.Plane(
        graphics,
        apiMesh,
        objectMesh.width,
        objectMesh.height,
        objectMesh.widthSegments,
        objectMesh.heightSegments
    );

};

GameLib.D3.Mesh.Plane.prototype.getHeightData = function(img,scale) {

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

        if (GameLib.Utils.UndefinedOrNull(img)) {
            img = this.instance.material.bumpMap.image;
        }

        var canvas = document.createElement( 'canvas' );
        canvas.width = img.width;
        canvas.height = img.height;
        var context = canvas.getContext( '2d' );

        var size = img.width * img.height;
        var data = new Float32Array( size );

        context.drawImage(img,0,0);

        for ( var i = 0; i < size; i ++ ) {
            data[i] = 0
        }

        var imgd = context.getImageData(0, 0, img.width, img.height);
        var pix = imgd.data;

        var j=0;
        for (var i = 0; i<pix.length; i +=4) {
            var all = pix[i]+pix[i+1]+pix[i+2];
            data[j++] = all/(12*scale);
        }

        return data;

};

/**
 *
 * @returns {THREE.PlaneGeometry}
 */
GameLib.D3.Mesh.Plane.prototype.generateHeightMapFromBumpMap = function() {
    var data = this.getHeightData();

    for ( var i = 0; i < this.instance.geometry.vertices.length; i++ ) {
        this.instance.geometry.vertices[i].z = data[i];
    }

    this.instance.geometry.verticesNeedUpdate = true;

    this.updateVerticesFromGeometryInstance(this.instance.geometry);

    // this.updateInstance();
};