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package{
	//imports
	import flash.display.MovieClip;
	import flash.display.Sprite;
	import flash.events.*;
	//defining the class
	public class Enemy extends MovieClip{
		private var _root:MovieClip;
		public var xSpeed:int;//how fast it's going horizontally
		public var ySpeed:int;//how fast it's going vertically
		public var maxSpeed:int = 3;//how fast it can possibly go
 
		public function Enemy(){
			this.addEventListener(Event.ADDED, beginClass);
			this.addEventListener(Event.ENTER_FRAME, eFrameEvents);
		}
		private function beginClass(e:Event):void{
			_root = MovieClip(root);//defining the root
 
			//checking what the start direction is
			if(_root.startDir == 'UP'){//if it's starting up
				this.y = 300;//set the y value off the field
				this.x = _root.startCoord;//make the x value where it should be
				this.xSpeed = 0;//make it not move horizontally
				this.ySpeed = -maxSpeed;//make it move upwards
			} else if(_root.startDir == 'RIGHT'){//and so on for other directions
				this.x = -25;
				this.y = _root.startCoord;
				this.xSpeed = maxSpeed;
				this.ySpeed = 0;
			} else if(_root.startDir == 'DOWN'){
				this.y = -25;
				this.x = _root.startCoord;
				this.xSpeed = 0;
				this.ySpeed = maxSpeed;
			} else if(_root.startDir == 'LEFT'){
				this.x = 550;
				this.y = _root.startCoord;
				this.xSpeed = -maxSpeed;
				this.ySpeed = 0;
			}
 
			//draw the actual enemy, it's just a red ball
			this.graphics.beginFill(0xFF0000);
			this.graphics.drawCircle(12.5,12.5,5);
			this.graphics.endFill();
		}
		private function eFrameEvents(e:Event):void{
			//move it based on x and y value
			this.x += xSpeed;
			this.y += ySpeed;
 
			//checking what direction it goes when finishing the path
			if(_root.finDir == 'UP'){//if it finishes at the top
				if(this.y <= -25){//if the y value is too high
					destroyThis();//then remove this guy from the field
				}
			} else if(_root.finDir == 'RIGHT'){//and so on for other directions
				if(this.x >= 550){
					destroyThis();
				}
			} else if(_root.finDir == 'DOWN'){
				if(this.y >= 300){
					destroyThis();
				}
			} else if(_root.startDir == 'LEFT'){
				if(this.x <= 0){
					destroyThis();
				}
			}
 
			//remove this from stage when game is over
			if(_root.gameOver){
				destroyThis();
			}
		}
		public function destroyThis():void{
			//this function will make it easier to remove this from stage
			this.removeEventListener(Event.ENTER_FRAME, eFrameEvents);
			this.parent.removeChild(this);
		}
	}
}

var currentEnemy:int = 0;//the current enemy that we're creating from the array
var enemyTime:int = 0;//how many frames have elapsed since the last enemy was created
var enemyLimit:int = 12;//how many frames are allowed before another enemy is created
var enemyArray:Array = new Array();//this array will tell the function when to create an enemy
var enemiesLeft:int;//how many enemies are left on the field
enemyArray = [//defining the array
			[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],//1's will just represent an enemy to be created
			[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],//another row means another level
			[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
			  ];

addEventListener(Event.ENTER_FRAME, eFrame);//adding an eFrame function
function eFrame(e:Event):void{
	makeEnemies();//we'll just make some enemies
}
 
function makeEnemies():void{//this function will add enemies to the field
	if(enemyTime < enemyLimit){//if it isn't time to make them yet
		enemyTime ++;//then keep on waiting
	} else {//otherwise
		var theCode:int = enemyArray[currentLvl-1][currentEnemy];//get the code from the array
		if(theCode == 1){//if it's set as 1
			var newEnemy:Enemy = new Enemy();//then create a new enemy
			enemyHolder.addChild(newEnemy);//and add it to the enemyholder
		}
		currentEnemy ++;//move on to the next enemy
		enemyTime = 0;//and reset the time
	}
}

var enemyHolder:Sprite = new Sprite();
addChild(enemyHolder);

for(var i:int=0;i<enemyArray[currentLvl-1].length;i++){
	if(enemyArray[currentLvl-1][i] == 1){
		enemiesLeft ++;
	}
}

if(directType == 'START'){
	if(directType == 'START'){//if this is a start block
		//then define the startDir and StartCoord based on it's coordinates
		if(this.x == 0){
			_root.startDir = 'RIGHT';
			_root.startCoord = this.y;
		} else if (this.y == 0){
			_root.startDir = 'DOWN';
			_root.startCoord = this.x;
		} else if (this.x == 525){
			_root.startDir = 'LEFT';
			_root.startCoord = this.y;
		} else if (this.y == 275){
			_root.startDir = 'UP';
			_root.startCoord = this.x;
		} else {
			//this level won't work if not any of these values
		}
	} else if (directType == 'FINISH'){//if this is a finish block
		//then define the finDir based on it's coordinates
		if(this.x == 0){
			_root.finDir = 'LEFT';
		} else if (this.y == 0){
			_root.finDir = 'UP';
		} else if (this.x == 525){
			_root.finDir = 'RIGHT';
		} else if (this.y == 275){
			_root.finDir = 'DOWN';
		} else {
			//this level won't work if not any of these values
		}
	}

if(directType != 'START' && directType != 'FINISH'){//if this isn't a start of finish block
	//then it'll act as a directioning block
	for(var i:int = 0;i<_root.enemyHolder.numChildren;i++){//create a loop
		var enTarget = _root.enemyHolder.getChildAt(i);//this will hold a certain enemy
		//if the enTarget's coordinates are too close to this block
		if(this.x >= enTarget.x - enTarget.width*.5 && this.x <= enTarget.x + enTarget.width*.5
		&& this.y >= enTarget.y - enTarget.height*.5 && this.y <= enTarget.y + enTarget.height*.5){
			//then move the enemy's direction based on what direction this block points to
			if(directType == 'UP'){
				enTarget.xSpeed = 0;
				enTarget.ySpeed = -enTarget.maxSpeed;
			} else if(directType == 'RIGHT'){
				enTarget.xSpeed = enTarget.maxSpeed;
				enTarget.ySpeed = 0;
			} else if(directType == 'DOWN'){
				enTarget.xSpeed = 0;
				enTarget.ySpeed = enTarget.maxSpeed;
			} else if(directType == 'LEFT'){
				enTarget.xSpeed = enTarget.maxSpeed;
				enTarget.ySpeed = 0;
			}
		}
	}
}