/// <reference path="../../../dist/preview release/babylon.d.ts"/>

module BABYLON {
    var maxSimultaneousLights = 4;

    class FireMaterialDefines extends MaterialDefines {
        public DIFFUSE = false;
        public CLIPPLANE = false;
        public ALPHATEST = false;
        public POINTSIZE = false;
        public FOG = false;
        public UV1 = false;
        public NORMAL = false;
        public VERTEXCOLOR = false;
        public VERTEXALPHA = false;
        public BONES = false;
        public BONES4 = false;
        public BonesPerMesh = 0;
        public INSTANCES = false;

        constructor() {
            super();
            this._keys = Object.keys(this);
        }
    }

    export class FireMaterial extends Material {
        public diffuseTexture: BaseTexture;
        public distortionTexture: BaseTexture;
        public opacityTexture: BaseTexture;

        public diffuseColor = new Color3(1, 1, 1);
        public disableLighting = false;
        
        public speed = 1.0;
        
        private _scaledDiffuse = new Color3();
        private _renderId: number;

        private _defines = new FireMaterialDefines();
        private _cachedDefines = new FireMaterialDefines();
        
        private _lastTime: number = 0;

        constructor(name: string, scene: Scene) {
            super(name, scene);

            this._cachedDefines.BonesPerMesh = -1;
        }

        public needAlphaBlending(): boolean {
            return (this.alpha < 1.0);
        }

        public needAlphaTesting(): boolean {
            return false;
        }

        public getAlphaTestTexture(): BaseTexture {
            return null;
        }

        // Methods   
        private _checkCache(scene: Scene, mesh?: AbstractMesh, useInstances?: boolean): boolean {
            if (!mesh) {
                return true;
            }

            if (this._defines.INSTANCES !== useInstances) {
                return false;
            }

            if (mesh._materialDefines && mesh._materialDefines.isEqual(this._defines)) {
                return true;
            }

            return false;
        }

        public isReady(mesh?: AbstractMesh, useInstances?: boolean): boolean {
            if (this.checkReadyOnlyOnce) {
                if (this._wasPreviouslyReady) {
                    return true;
                }
            }

            var scene = this.getScene();

            if (!this.checkReadyOnEveryCall) {
                if (this._renderId === scene.getRenderId()) {
                    if (this._checkCache(scene, mesh, useInstances)) {
                        return true;
                    }
                }
            }

            var engine = scene.getEngine();
            var needNormals = false;
            var needUVs = false;

            this._defines.reset();

            // Textures
            if (scene.texturesEnabled) {
                if (this.diffuseTexture && StandardMaterial.DiffuseTextureEnabled) {
                    if (!this.diffuseTexture.isReady()) {
                        return false;
                    } else {
                        needUVs = true;
                        this._defines.DIFFUSE = true;
                    }
                }                
            }

            // Effect
            if (scene.clipPlane) {
                this._defines.CLIPPLANE = true;
            }
            
            this._defines.ALPHATEST = true;

            // Point size
            if (this.pointsCloud || scene.forcePointsCloud) {
                this._defines.POINTSIZE = true;
            }

            // Fog
            if (scene.fogEnabled && mesh && mesh.applyFog && scene.fogMode !== Scene.FOGMODE_NONE && this.fogEnabled) {
                this._defines.FOG = true;
            }
            
            // Attribs
            if (mesh) {
                if (needNormals && mesh.isVerticesDataPresent(VertexBuffer.NormalKind)) {
                    this._defines.NORMAL = true;
                }
                if (needUVs) {
                    if (mesh.isVerticesDataPresent(VertexBuffer.UVKind)) {
                        this._defines.UV1 = true;
                    }
                }
                if (mesh.useVertexColors && mesh.isVerticesDataPresent(VertexBuffer.ColorKind)) {
                    this._defines.VERTEXCOLOR = true;

                    if (mesh.hasVertexAlpha) {
                        this._defines.VERTEXALPHA = true;
                    }
                }
                if (mesh.useBones && mesh.computeBonesUsingShaders) {
                    this._defines.BONES = true;
                    this._defines.BonesPerMesh = (mesh.skeleton.bones.length + 1);
                    this._defines.BONES4 = true;
                }

                // Instances
                if (useInstances) {
                    this._defines.INSTANCES = true;
                }
            }

            // Get correct effect      
            if (!this._defines.isEqual(this._cachedDefines)) {
                this._defines.cloneTo(this._cachedDefines);

                scene.resetCachedMaterial();

                // Fallbacks
                var fallbacks = new EffectFallbacks();             
                if (this._defines.FOG) {
                    fallbacks.addFallback(1, "FOG");
                }
             
                if (this._defines.BONES4) {
                    fallbacks.addFallback(0, "BONES4");
                }

                //Attributes
                var attribs = [VertexBuffer.PositionKind];

                if (this._defines.NORMAL) {
                    attribs.push(VertexBuffer.NormalKind);
                }

                if (this._defines.UV1) {
                    attribs.push(VertexBuffer.UVKind);
                }

                if (this._defines.VERTEXCOLOR) {
                    attribs.push(VertexBuffer.ColorKind);
                }

                if (this._defines.BONES) {
                    attribs.push(VertexBuffer.MatricesIndicesKind);
                    attribs.push(VertexBuffer.MatricesWeightsKind);
                }

                if (this._defines.INSTANCES) {
                    attribs.push("world0");
                    attribs.push("world1");
                    attribs.push("world2");
                    attribs.push("world3");
                }

                // Legacy browser patch
                var shaderName = "fire";
                
                var join = this._defines.toString();
                this._effect = scene.getEngine().createEffect(shaderName,
                    attribs,
                    ["world", "view", "viewProjection", "vEyePosition",
                        "vFogInfos", "vFogColor", "pointSize",
                        "vDiffuseInfos", 
                        "mBones",
                        "vClipPlane", "diffuseMatrix",
                        // Fire
                        "time", "speed"
                    ],
                    ["diffuseSampler",
                        // Fire
                        "distortionSampler", "opacitySampler"
                    ],
                    join, fallbacks, this.onCompiled, this.onError);
            }
            
            if (!this._effect.isReady()) {
                return false;
            }

            this._renderId = scene.getRenderId();
            this._wasPreviouslyReady = true;

            if (mesh) {
                if (!mesh._materialDefines) {
                    mesh._materialDefines = new FireMaterialDefines();
                }

                this._defines.cloneTo(mesh._materialDefines);
            }

            return true;
        }

        public bindOnlyWorldMatrix(world: Matrix): void {
            this._effect.setMatrix("world", world);
        }

        public bind(world: Matrix, mesh?: Mesh): void {
            var scene = this.getScene();

            // Matrices        
            this.bindOnlyWorldMatrix(world);
            this._effect.setMatrix("viewProjection", scene.getTransformMatrix());

            // Bones
            if (mesh && mesh.useBones && mesh.computeBonesUsingShaders) {
                this._effect.setMatrices("mBones", mesh.skeleton.getTransformMatrices());
            }

            if (scene.getCachedMaterial() !== this) {
                // Textures        
                if (this.diffuseTexture && StandardMaterial.DiffuseTextureEnabled) {
                    this._effect.setTexture("diffuseSampler", this.diffuseTexture);

                    this._effect.setFloat2("vDiffuseInfos", this.diffuseTexture.coordinatesIndex, this.diffuseTexture.level);
                    this._effect.setMatrix("diffuseMatrix", this.diffuseTexture.getTextureMatrix());
                    
                    this._effect.setTexture("distortionSampler", this.distortionTexture);
                    this._effect.setTexture("opacitySampler", this.opacityTexture);
                }
                
                // Clip plane
                if (scene.clipPlane) {
                    var clipPlane = scene.clipPlane;
                    this._effect.setFloat4("vClipPlane", clipPlane.normal.x, clipPlane.normal.y, clipPlane.normal.z, clipPlane.d);
                }

                // Point size
                if (this.pointsCloud) {
                    this._effect.setFloat("pointSize", this.pointSize);
                }

                this._effect.setVector3("vEyePosition", scene._mirroredCameraPosition ? scene._mirroredCameraPosition : scene.activeCamera.position);                
            }

            this._effect.setColor4("vDiffuseColor", this._scaledDiffuse, this.alpha * mesh.visibility);

            // View
            if (scene.fogEnabled && mesh.applyFog && scene.fogMode !== Scene.FOGMODE_NONE) {
                this._effect.setMatrix("view", scene.getViewMatrix());
            }
            
            // Fog
            if (scene.fogEnabled && mesh.applyFog && scene.fogMode !== Scene.FOGMODE_NONE) {
                this._effect.setFloat4("vFogInfos", scene.fogMode, scene.fogStart, scene.fogEnd, scene.fogDensity);
                this._effect.setColor3("vFogColor", scene.fogColor);
            }
            
            // Time
            this._lastTime += scene.getEngine().getDeltaTime();
            this._effect.setFloat("time", this._lastTime);
            
            // Speed
            this._effect.setFloat("speed", this.speed);

            super.bind(world, mesh);
        }

        public getAnimatables(): IAnimatable[] {
            var results = [];

            if (this.diffuseTexture && this.diffuseTexture.animations && this.diffuseTexture.animations.length > 0) {
                results.push(this.diffuseTexture);
            }
            if (this.distortionTexture && this.distortionTexture.animations && this.distortionTexture.animations.length > 0) {
                results.push(this.distortionTexture);
            }
            if (this.opacityTexture && this.opacityTexture.animations && this.opacityTexture.animations.length > 0) {
                results.push(this.opacityTexture);
            }

            return results;
        }

        public dispose(forceDisposeEffect?: boolean): void {
            if (this.diffuseTexture) {
                this.diffuseTexture.dispose();
            }
            if (this.distortionTexture) {
                this.distortionTexture.dispose();
            }

            super.dispose(forceDisposeEffect);
        }

        public clone(name: string): FireMaterial {
            var newMaterial = new FireMaterial(name, this.getScene());

            // Base material
            this.copyTo(newMaterial);

            // Fire material
            if (this.diffuseTexture && this.diffuseTexture.clone) {
                newMaterial.diffuseTexture = this.diffuseTexture.clone();
            }
            if (this.distortionTexture && this.distortionTexture.clone) {
                newMaterial.distortionTexture = this.distortionTexture.clone();
            }
            if (this.opacityTexture && this.opacityTexture.clone) {
                newMaterial.opacityTexture = this.opacityTexture.clone();
            }

            newMaterial.diffuseColor = this.diffuseColor.clone();
            return newMaterial;
        }
    }
}