/* <copyright>
Copyright (c) 2012, Motorola Mobility LLC.
All Rights Reserved.

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modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.

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  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

* Neither the name of Motorola Mobility LLC nor the names of its
  contributors may be used to endorse or promote products derived from this
  software without specific prior written permission.

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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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</copyright> */

var Material = require("js/lib/rdge/materials/material").Material;
var Texture = require("js/lib/rdge/texture").Texture;

///////////////////////////////////////////////////////////////////////
// Class GLMaterial
//      RDGE representation of a material.
///////////////////////////////////////////////////////////////////////
var TwistVertMaterial = function TwistVertMaterial()
{
    // initialize the inherited members
    this.inheritedFrom = Material;
    this.inheritedFrom();

    ///////////////////////////////////////////////////////////////////////
    // Instance variables
    ///////////////////////////////////////////////////////////////////////
    this._name = "Twist Vertex";
    this._shaderName = "twistVert";

    this._tex0 = 'assets/images/rocky-normal.jpg';
    this._tex1 = 'assets/images/metal.png';

    this._angle = 0.0;
    this._deltaTime = 0.01;
    this._speed = 1.0;

    ///////////////////////////////////////////////////////////////////////
    // Property Accessors
    ///////////////////////////////////////////////////////////////////////
    this.getShaderName = function () { return this._shaderName; };
    this.isAnimated = function () { return true; };
    this.getShaderDef   = function()    {  return twistVertShaderDef;   };
    this.getTechniqueName   = function() { return 'twistMe' };

    this.hasVertexDeformation = function () { return this._hasVertexDeformation; };
    this._hasVertexDeformation = true;
    this._vertexDeformationTolerance = 0.1; // should be a property

    ///////////////////////////////////////////////////////////////////////
    // Material Property Accessors
    ///////////////////////////////////////////////////////////////////////
    this._propNames = [ "u_limit1",             "u_limit2",         "u_twistAmount",    "speed",        "u_tex0",                       "u_tex1"];
    this._propLabels = [ "Start Parameter",     "End Paramater",    "Twist Amount",     "Speed",        "Front facing texture map",     "Back facing texture map"];
    this._propTypes = [ "float",                "float",            "angle",            "float",        "file",                         "file"];
    this._propValues = [];

    // initialize the property values
    this._propValues[this._propNames[0]] = 0.0;
    this._propValues[this._propNames[1]] = 1.0;
    this._propValues[this._propNames[2]] = 2.0 * Math.PI;
    this._propValues[this._propNames[3]] = this._speed;
    this._propValues[this._propNames[4]] = this._tex0.slice();
    this._propValues[this._propNames[5]] = this._tex1.slice();
    ///////////////////////////////////////////////////////////////////////

    ///////////////////////////////////////////////////////////////////////
    // Methods
    ///////////////////////////////////////////////////////////////////////

    this.init = function (world)
    {
        this.setWorld(world);

        // set up the shader
        this._shader = new RDGE.jshader();
        this._shader.def = twistVertShaderDef;
        this._shader.init();

        // set up the material node
        this._materialNode = RDGE.createMaterialNode("twistVertMaterial" + "_" + world.generateUniqueNodeID());
        this._materialNode.setShader(this._shader);


        // initialize the twist vert properties
        this.setShaderValues();
    };

	this.resetToDefault = function()
	{
		this._propValues[this._propNames[0]] = 0.0;
		this._propValues[this._propNames[1]] = 1.0;
		this._propValues[this._propNames[2]] = 2.0 * Math.PI;
		this._propValues[this._propNames[3]] = this._speed;
		this._propValues[this._propNames[4]] = this._tex0.slice();
		this._propValues[this._propNames[5]] = this._tex1.slice();

		var nProps = this._propNames.length;
		for (var i=0; i<nProps;  i++)
			this.setProperty( this._propNames[i],  this._propValues[this._propNames[i]]  );
	};

    this.update = function (time)
    {
        if (this._shader && this._shader.twistMe)
        {
            var technique = this._shader.twistMe;

            var angle = this._angle;
            angle += this._deltaTime * this._propValues["speed"];
            if (angle > this._propValues["u_twistAmount"])
            {
                angle = this._propValues["u_twistAmount"];
                this._deltaTime = -this._deltaTime;
            }
            else if (angle < 0.0)
            {
                angle = 0;
                this._deltaTime = -this._deltaTime;
            }
            this._angle = angle;
            this._shader.twistMe["u_twistAmount"].set([angle]);

            var tex;
            var glTex = this._glTextures["u_tex0"];
            if (glTex)
            {
                //if (glTex.isAnimated())
                    glTex.render();
                tex = glTex.getTexture();
                if (tex)
                    technique.u_tex0.set( tex );
            }

            glTex = this._glTextures["u_tex1"];
            if (glTex)
            {
                //if (glTex.isAnimated())
                    glTex.render();
                tex = glTex.getTexture();
                if (tex)
                    technique.u_tex1.set( tex );
            }

        }
    }
};

// shader spec (can also be loaded from a .JSON file, or constructed at runtime)
twistVertShaderDef =
{
    'shaders': { // shader files
        'defaultVShader': "assets/shaders/TwistVert.vert.glsl",
        'defaultFShader': "assets/shaders/TwistVert.frag.glsl"
    },
    'techniques': { // rendering control
        'twistMe': [ // simple color pass
            {
            'vshader': 'defaultVShader',
            'fshader': 'defaultFShader',

            // attributes
            'attributes':
                 {
                     'vert': { 'type': 'vec3' },
                     'normal': { 'type': 'vec3' },
                     'texcoord': { 'type': 'vec2' }
                 },
            // attributes
            'params':
                 {
                    'u_tex0': { 'type' : 'tex2d' },
                    'u_tex1': { 'type' : 'tex2d' },
                     'u_limit1': { 'type': 'float' },
                     'u_limit2': { 'type': 'float' },
                     'u_minVal': { 'type': 'float' },
                     'u_maxVal': { 'type': 'float' },
                     'u_center': { 'type': 'float' },
                     'u_twistAmount': { 'type': 'float' },
                     'speed': { 'type': 'float' }
                 }
            }
        ]
    }
};

if (typeof exports === "object") {
    exports.TwistVertMaterial = TwistVertMaterial;
}