var o0 = require('o0');

module.exports = {
    Filter: class{
        constructor() {

			this.stableAcceleration = null;
			this.maxrecordCount = 999999;

			this.frame = [];
			this.frameHit = [];//打击后的n帧
			for(var i = 0;i<200;++i){
				var o = new Object();
				o.time = new Date().getTime();
				o.timeGap = 20;
				o.acc = new o0.Vector2(0,0);
				o.gyr = new o0.Vector2(0,0);
				o.accFixed = 0;
				o.accSlope = 0;
				o.pos = new o0.Vector2(0,0);
				o.predict = new o0.Vector2(0,0);
				o.shake = 0;
				o.shakeFixed = 1;
				o.shakeSlope = 0;
				o.reliable = 1;
				o.speed = new o0.Vector2(0,0);
				o.hit = 0;
				this.frame.push(o);
				//this.frameHit.push(o);
			}
			this.frameSwing = this.frame[0];
			//this.frame = 0;

			this.force = new o0.Vector2(0,0);
			this.forceChanged = 0;
			this.momentum = 999999;
			this.momentunTime = 0;
			this.momentunSeek = 0.1;
			this.momentunPunch = false;
			this.punchCount = 0;
			this.leftRight = false;
			
			this.forceRecord = [];
			for(var i = 0;i<1;++i){
				this.forceRecord.push(new o0.Vector2(0,0));
			}/** */
			this.angle = 0;
        }
		Update(vector3,timeGap,gyr){
			if(this.stableAcceleration == null){
				this.stableAcceleration = vector3;
				this.recordCount = 1;
			}else{
				this.recordCount += 1;
				if(this.recordCount > this.maxrecordCount){
					this.recordCount = this.maxrecordCount;
				}
				let recordCount = this.recordCount;
				this.stableAcceleration = this.stableAcceleration.multiply((recordCount-1)/recordCount).plus(vector3.multiply(1/recordCount));
			}

			//++this.frame;

			var newForce = vector3.minus(this.stableAcceleration);

			var newFrame = new Object();
			newFrame.time = new Date().getTime();
			newFrame.timeGap = timeGap;
			newFrame.acc = new o0.Vector2(newForce.x,newForce.z);
			newFrame.gyr = new o0.Vector2(gyr.z,-gyr.x);
			let lastFrame = this.frame[this.frame.length-1];
			let last2Frame = this.frame[this.frame.length-2];
			let last3Frame = this.frame[this.frame.length-3];
			let last4Frame = this.frame[this.frame.length-4];
			let last5Frame = this.frame[this.frame.length-5];
			//////////////////////////////////////////////////////////////////////
			newFrame.accFixed = newFrame.acc.length * 100;

			if(newFrame.accFixed < lastFrame.accFixed * 0.85){
				newFrame.accFixed = lastFrame.accFixed * 0.85;
			}
			lastFrame.accFixed = Math.max(lastFrame.accFixed, Math.min(newFrame.accFixed,last2Frame.accFixed), Math.min(newFrame.accFixed,last3Frame.accFixed));
			///////////////////////////////////////////////////////////////////////
			//newFrame.pos = lastFrame.pos.plus(lastFrame.acc.plus(newFrame.acc).multiply(timeGap/60)).multiply(Math.max(1-timeGap/200,0));
			newFrame.pos = lastFrame.pos.plus(newFrame.acc.multiply(timeGap/30)).multiply(Math.max(1-timeGap/1000,0));
			////////////////////////////////////////////
			var accSlpoe1 = (newFrame.accFixed-lastFrame.accFixed);
			var accSlpoe2 = (newFrame.accFixed-last2Frame.accFixed);
			var accSlpoe3 = (newFrame.accFixed-last3Frame.accFixed);
			//newFrame.accSlope = accSlpoe1;
			//newFrame.accSlope = Math.min(accSlpoe1,accSlpoe2);
			//newFrame.accSlope = Math.min(accSlpoe1,accSlpoe2,accSlpoe3);
			newFrame.accSlope = Math.max(newFrame.accFixed-lastFrame.accFixed,0);

			/*
			if(newFrame.accSlope > 8){
				newFrame.accSlope = 1; 
			}else if(newFrame.accSlope <= 8){
				newFrame.accSlope = 0;
			}/** */
			/////////////////////////////////////////////////

			var lastI = this.frame.length-1;
			var t2 = this.frame[lastI-1].timeGap;
			var t3 = this.frame[lastI].timeGap + t2;
			var t4 = newFrame.timeGap + t3;
			
			/*newFrame.predict = new o0.Vector2(
				new o0.QuadraticEquation(0,this.frame[lastI-2].acc.x,t2,this.frame[lastI-1].acc.x,t3,this.frame[lastI].acc.x).y(t4),
				new o0.QuadraticEquation(0,this.frame[lastI-2].acc.y,t2,this.frame[lastI-1].acc.y,t3,this.frame[lastI].acc.y).y(t4));/** */
			/*
			newFrame.predict = new o0.Vector2(
				new o0.QuadraticEquation(0,this.frame[lastI-2].pos.x,t2,this.frame[lastI-1].pos.x,t3,this.frame[lastI].pos.x).y(t4),
				new o0.QuadraticEquation(0,this.frame[lastI-2].pos.y,t2,this.frame[lastI-1].pos.y,t3,this.frame[lastI].pos.y).y(t4));/** */
			
			newFrame.predict = new o0.Vector2(
				new o0.QuadraticEquation(0,this.frame[lastI-2].pos.x,t2,this.frame[lastI-1].pos.x,t3,this.frame[lastI].pos.x).y(t4),
				new o0.QuadraticEquation(0,this.frame[lastI-2].pos.y,t2,this.frame[lastI-1].pos.y,t3,this.frame[lastI].pos.y).y(t4));/** */
			//console.log(newFrame.pos);
			//////////////////////////////////////////
			//newFrame.shake = o0.distance2(newFrame.predict,newFrame.pos) * 500;
			//console.log(newFrame.pos.minus(lastFrame.pos).mod.angle(newFrame.predict.minus(lastFrame.pos).mod));

			//newFrame.shake = o0.distance2(newFrame.predict,newFrame.acc) * 100;
			newFrame.shake = o0.distance2(newFrame.predict,newFrame.pos) * 100;


			//newFrame.shake = o0.distance2(newFrame.predict,lastFrame.pos) * newFrame.acc.length / timeGap * 2000;
			
			if(isNaN(newFrame.shake)){
				newFrame.shake = 0.0;
			}/** */
			//newFrame.shake = Math.pow(o0.distance2(newFrame.predict,newFrame.pos) * newFrame.acc.length / timeGap,0.5) * 500;
			/////////////////////////////下面的代码有优化空间
			//newFrame.shakeFixed = lastFrame.shakeFixed * 0.9;
			//newFrame.shakeFixed = lastFrame.shakeFixed*(1.0+newFrame.shake)*0.9;
			//newFrame.shakeFixed = Math.pow(lastFrame.shakeFixed*(1.0+newFrame.shake),0.5)+1;
			//console.log(newFrame.shakeFixed+1);
			//newFrame.shakeFixed = newFrame.shake;
			
			newFrame.shakeFixed = lastFrame.shakeFixed * 0.85;
			if(newFrame.shake > newFrame.shakeFixed){
				newFrame.shakeFixed = newFrame.shake;
			}/* */
			lastFrame.shakeFixed = Math.max(lastFrame.shakeFixed, Math.min(newFrame.shakeFixed,last2Frame.shakeFixed), Math.min(newFrame.shakeFixed,last3Frame.shakeFixed));
			////////////////////////////////////////////////////////////////
			/*
			var shakeSlpoe1 = (newFrame.shakeFixed-lastFrame.shakeFixed);
			var shakeSlpoe2 = (newFrame.shakeFixed-last2Frame.shakeFixed);
			var shakeSlpoe3 = (newFrame.shakeFixed-last3Frame.shakeFixed);
			//newFrame.accSlope = accSlpoe1;
			//newFrame.accSlope = Math.min(accSlpoe1,accSlpoe2);
			newFrame.shakeSlope = Math.min(shakeSlpoe1,shakeSlpoe2,shakeSlpoe3);
			newFrame.shakeSlope = Math.max(newFrame.shakeSlope,0);/** */
			newFrame.shakeSlope = Math.max(newFrame.shakeFixed-lastFrame.shakeFixed,0);
			
			/*
			if(newFrame.shakeSlope > 40){
				newFrame.shakeSlope = 1;
			}else{
				newFrame.shakeSlope = 0;
			}/** */
			//////////////////////////////////////////////
			/*
			var slopeChange = newFrame.shakeFixed - lastFrame.shakeFixed;
			if(slopeChange < 0){
				newFrame.slope = (lastFrame.slope + (newFrame.shakeFixed - lastFrame.shakeFixed) / timeGap * 100) * 0.8;
			}else{
				newFrame.slope = (lastFrame.slope + (newFrame.shakeFixed - lastFrame.shakeFixed) / timeGap * 20) * 0.8;
			}
			if(newFrame.slope<0){
				newFrame.slope = 0;
			}/** */
			/////////////////////////////下面的代码有很大优化空间
			if(lastFrame.hit==0
				&& last2Frame.hit==0
				&& last3Frame.hit==0
				&& last4Frame.hit==0
				&& last5Frame.hit==0
				&& (newFrame.accSlope >= 15 || lastFrame.accSlope >= 20)
				&& (newFrame.shakeSlope >= 20 || lastFrame.shakeSlope >= 40)){
				newFrame.hit = newFrame.shake;
				this.frameHit = [];

				//this.frameSwing = last2Frame;
				for(var i = this.frame.length-3;i>=1;--i){
					let io = this.frame[i];
					let pio = this.frame[i-1];
					if(io.accFixed*0.85 <= pio.accFixed && io.accFixed >= pio.accFixed * 0.85){
						this.frameSwing = io;
					}
				}


			}else{
				newFrame.hit = 0;
			}


			/*
			if(lastFrame.hit == 0 
				&& this.frame[this.frame.length-2].hit == 0
				&& this.frame[this.frame.length-3].hit == 0
				&& newFrame.shakeFixed > 150
				&& newFrame.shakeFixed > lastFrame.shakeFixed * 2){
				newFrame.hit = newFrame.shakeFixed;
			}else{
				newFrame.hit = 0;
			}/** */
			/////////////力量大小
			if(lastFrame.hit!=0){
				lastFrame.hit = lastFrame.hit + newFrame.shake;
			}else if(last2Frame.hit!=0){
				last2Frame.hit = last2Frame.hit + newFrame.shake;
			}else if(last3Frame.hit!=0){
				last3Frame.hit = last3Frame.hit + newFrame.shake;
			}else if(last4Frame.hit!=0){
				last4Frame.hit = last4Frame.hit + newFrame.shake;
			}else if(last5Frame.hit!=0){
				last5Frame.hit = last5Frame.hit + newFrame.shake;
				console.log(last5Frame.hit);
			}/** */
			//newFrame.shake = o0.distance2(newFrame.predict,newFrame.pos) * o0.distance2(lastFrame.pos,newFrame.pos);
			//////////////////////////////////////////////////////////////////////////////////
			newFrame.reliable = Math.pow((Math.PI/2 - Math.atan(newFrame.shakeFixed/10000)) / (Math.PI/2),2000);

			let lastFrameAddSpeed = lastFrame.acc.multiply(lastFrame.timeGap/20).multiply(lastFrame.reliable);
			let newFrameAddSpeed = newFrame.acc.multiply(newFrame.timeGap/20).multiply(newFrame.reliable);
			
			newFrame.speed = lastFrame.speed.multiply(0.8);
			var lastFrameAngle = newFrame.speed.angle(lastFrameAddSpeed);
			if(isNaN(lastFrameAngle)){
				lastFrameAngle = 180.0;
			}
			//newFrame.speed = newFrame.speed.plus(lastFrameAddSpeed.multiply(Math.max(1,lastFrameAngle/60.0 - 1)));
			//newFrame.speed = newFrame.speed.multiply(1).plus(lastFrameAddSpeed.multiply(Math.max(1,lastFrameAngle/60.0 - 1)));
			newFrame.speed = newFrame.speed.multiply(1-lastFrameAngle/360.0).plus(lastFrameAddSpeed.multiply(Math.max(1,lastFrameAngle/60.0-1)));
			var newFrameAngle = newFrame.speed.angle(newFrameAddSpeed);
			if(isNaN(newFrameAngle)){
				newFrameAngle = 180.0;
			}
			//newFrame.speed = newFrame.speed.plus(newFrameAddSpeed.multiply(Math.min(1,newFrameAngle/60.0-1)));
			newFrame.speed = newFrame.speed.multiply(1-newFrameAngle/360.0).plus(newFrameAddSpeed.multiply(Math.max(1,newFrameAngle/60.0-1)));


			//////////////////////
			this.frame.shift();
			this.frame.push(newFrame);
			if(this.frameHit.length <=10){
				var o = new Object();
				o.time = newFrame.time;
				o.timeGap = newFrame.timeGap;
				o.acc = newFrame.acc;
				o.gyr = newFrame.gyr;

				let frameHitLength = this.frameHit.length+1;
				let lastFrameHit = this.frameHit[this.frameHit.length-1];
				if(frameHitLength == 1){
					o.allShakeLength = newFrame.shakeFixed;
				}else{
					o.allShakeLength = lastFrameHit.allShakeLength + newFrame.shakeFixed;
				}

				o.accFixed = o.acc.multiply(Math.pow(Math.max(0,1-newFrame.shakeFixed*frameHitLength / o.allShakeLength),5) * 20);//数字越大越忽略历史数据

				if(frameHitLength == 1){
					o.pos = o.accFixed.multiply(o.timeGap/60);
				}else{
					o.pos = lastFrameHit.pos.plus(lastFrameHit.accFixed.plus(o.accFixed).multiply(o.timeGap/60));
				}
				this.frameHit.push(o);
			}
			



			var vectorChanged = newForce.minus(this.force);
			var forceLength = this.force.length;
			var ForceChanged = newForce.length - forceLength;
			this.force = newForce;

			var currentLeftRight;
			if(Math.abs(newForce.x + newForce.z) > Math.abs(newForce.x - newForce.z)){
				currentLeftRight = Math.abs(newForce.x + newForce.z);
			}else{
				currentLeftRight = -Math.abs(newForce.x - newForce.z);
			}
			this.forceRecord.shift();
			this.forceRecord.push(newForce);
			
			if(this.forceChanged > 0 && ForceChanged < 0){// && forceLength > 0.1
				//&& this.momentum * Math.pow(0.9,(new Date().getTime()-this.momentunTime)/1) < forceLength){
				/*console.log(forceLength.toFixed(2));
				if( forceLength > 0.1 && forceLength >= this.momentum * 1.5){
					console.log(this.frame+" "+forceLength);
				}/** */
				if(forceLength > 0.1 && this.momentum != 999999){
					if(!this.momentunPunch){//等待击打
						if(this.momentunSeek > this.momentum){
							this.momentunSeek = this.momentum;
						}else{
							if(this.momentunSeek < this.momentum * 0.8 - 0.1){
								this.momentunPunch = !this.momentunPunch;
								this.punchCount++;
								//this.leftRight = (newForce.x+this.force.x) < 0;
								
								/*
								var largestForce = new o0.Vector3(0,0,0)
								for(var i = 0;i<this.forceRecord.length;++i){
									var element = this.forceRecord[i];
									if(largestForce.length < element.length){
										largestForce = element;
									}
								}
								if(Math.abs(largestForce.x + largestForce.z) > Math.abs(largestForce.x - largestForce.z)){
									currentLeftRight = Math.abs(largestForce.x + largestForce.z);
								}else{
									currentLeftRight = -Math.abs(largestForce.x - largestForce.z);
								}/** */
								this.leftRight = currentLeftRight < 0 ? "Right" : "Left";
								this.angle = new o0.Vector2(newForce.x,newForce.z).mod.angle(new o0.Vector2(0,1));
								if(this.angle > 90){
									this.angle = 180 -this.angle;
								}
								if(currentLeftRight > 0){
									this.angle = -this.angle;
								}/** */
								//this.leftRight = (largestChange.x > 0 && largestChange.z > 0) || (largestChange.x < 0 && largestChange.z < 0);
								/* */
								//console.log(this.momentum);
							}
						}
					}else{//打完了
						if(this.momentunSeek < this.momentum){
							this.momentunSeek = this.momentum;
						}else if(this.momentunSeek > this.momentum * 1.2 + 0.1){
							this.momentunPunch = !this.momentunPunch;
						}
					}
				}

				this.momentum = forceLength;
				this.momentunTime = new Date().getTime();
			}

			this.forceChanged = ForceChanged;
			


			//console.log(vector3.x);
			return [new o0.Vector3(newForce),currentLeftRight,this.momentum];
		}
        test(){
            return "123123131";
        }
    }
};