Retro Vaders: Mothership Boss AI

package  {
    import flash.display.MovieClip;
    import flash.filters.GlowFilter;

    public class BossVader3 extends MovieClip{

        public var health:Number = 120;
        public var colour:String = "red";

        public var pointValue:int = 1000;

        public var isBoss:Boolean = true;

        public var dead:Boolean = false;

        var moveDir:Number = 1;
        var speed:Number = 4;
        var attackPattern:String = "normal";

        var hitTimer:int = 60; // 1 second (due to game running at 60 frames per second)
        var canBeHit:Boolean = true;

        var fireTimer:int = 6;
        var fireRate:int = 12;
        var shotCount:int = 3;

        var parentClass:GameScreen;

        public function BossVader3() {
            // constructor code
        }

        public function doBossLogic(){
        if(!canBeHit){
        hitTimer --
        this.alpha = 0.25
        if(attackPattern != "critical"){
        attackPattern = "hit"
        }
        if(hitTimer <= 0){
        canBeHit = true;
        hitTimer = 60;
        this.alpha = 1;
        if(health <= 60 && attackPattern != "critical"){
        attackPattern = "triple"
        }
        else if(health > 60 && attackPattern != "critical"){
        attackPattern = "normal"
        }
        }
        }

        moveShip(attackPattern)
        attackPlayer(attackPattern)
        }

        function moveShip(atk){
        switch(atk){
        case "normal":
        this.x += moveDir * speed
        if(this.x > 550 && moveDir > 0){
        moveDir = -1;
        }
        if(this.x < 50 && moveDir < 0){
        moveDir = 1;
        }
        break;
        case "triple":
        this.x += moveDir * speed
        if(this.x > 550 && moveDir > 0){
        moveDir = -1;
        }
        if(this.x < 50 && moveDir < 0){
        moveDir = 1;
        }
        break;
        case "hit":
        this.x += moveDir * (speed * 3)
        if(this.x > 550 && moveDir > 0){
        moveDir = -1;
        }
        if(this.x < 50 && moveDir < 0){
        moveDir = 1;
        }
        break;
        case "critical":
        this.x += moveDir * speed
        if(this.x > 550 && moveDir > 0){
        moveDir = -1;
        }
        if(this.x < 50 && moveDir < 0){
        moveDir = 1;
        }
        break;

        }
        }

        function attackPlayer(atk){
        if(!parentClass.gamePaused){
        fireTimer --
        if(fireTimer <= 0){

        switch(atk){
        case "normal":
        parentClass.createEnemyBullet(this.x,this.y+10)
        fireTimer = fireRate;
        break;
        case "triple":
        parentClass.createEnemyBullet(this.x,this.y+10)
        parentClass.createEnemyBullet(this.x+20,this.y+10)
        parentClass.createEnemyBullet(this.x-20,this.y+10)
        fireTimer = fireRate;
        break;
        case "hit":
        parentClass.createEnemyBullet(this.x,this.y+10)
        fireTimer = 6;
        break;
        case "critical":
        parentClass.createEnemyBullet(this.x+(Math.random()*40-20),this.y+10)
        fireTimer = 6;
        break;
        }

        }
        }
        }

        public function init(pClass:GameScreen){
        parentClass = pClass
        this.health = 120
        updateSkin();
        }

        // takeDamage(amount)
        function takeDamage(amount:Number){
        if(this.health > 0 && canBeHit){
        if(attackPattern == "critical"){
        this.health -= 99
        }
        else{
        this.health -= amount
        }
        parentClass.createExplosion(this.x-40,this.y-15,this.colour);
        parentClass.createExplosion(this.x+40,this.y-15,this.colour);
        parentClass.createExplosion(this.x-80,this.y,this.colour);
        parentClass.createExplosion(this.x+80,this.y,this.colour);
        parentClass.createExplosion(this.x,this.y-30,this.colour);
        parentClass.createExplosion(this.x-40,this.y+15,this.colour);
        parentClass.createExplosion(this.x+40,this.y+15,this.colour);
        updateSkin();
        canBeHit = false;
        if(this.health <= 0){
        parentClass.createExplosion(this.x,this.y-40,"red");
        parentClass.createExplosion(this.x-40,this.y-30,"yellow");
        parentClass.createExplosion(this.x+40,this.y-30,"yellow");
        parentClass.createExplosion(this.x-80,this.y-30,"yellow");
        parentClass.createExplosion(this.x+80,this.y-30,"yellow");
        parentClass.challenges.boss3 = true;
        this.dead = true;
        }
        }
        }

        // updateSkin()
        public function updateSkin(){
        if(this.health <= 10){
        this.colour = "yellow"
        this.gotoAndStop("critical")
        this.attackPattern = "critical"
        speed = 15;
        fireRate = 12;
        }
        else if(this.health <= 20){
        this.colour = "yellow"
        this.gotoAndStop("yellow")
        speed = 4;
        fireRate = 30;
        this.attackPattern = "normal"
        }
        else if(this.health <= 30){
        this.colour = "blue"
        this.gotoAndStop("blue")
        speed = 4;
        fireRate = 22;
        }
        else if(this.health <= 40){
        this.colour = "green"
        this.gotoAndStop("green")
        speed = 4;
        fireRate = 24;
        }
        else if(this.health <= 50){
        this.colour = "red"
        this.gotoAndStop("green/red")
        speed = 3.5;
        fireRate = 24;
        }
        else if(this.health <= 60){
        this.colour = "red"
        this.gotoAndStop("red")
        speed = 3;
        fireRate = 24;
        this.attackPattern = "triple"
        }
        else if(this.health <= 70){
        this.colour = "white"
        this.gotoAndStop("red/white")
        speed = 5.25
        fireRate = 12;
        }
        else if(this.health <= 80){
        this.colour = "white"
        this.gotoAndStop("white")
        speed = 5.5;
        fireRate = 12;
        }
        else if(this.health <= 90){
        this.colour = "black"
        this.gotoAndStop("white/black")
        speed = 5.7
        fireRate = 12;
        }
        else if(this.health <= 100){
        this.colour = "black"
        this.gotoAndStop("black/white")
        speed = 5.8
        fireRate = 12;
        }
        else if(this.health <= 110){
        this.colour = "black"
        this.gotoAndStop("black")
        speed = 5.9
        fireRate = 12;
        }
        else {
        this.colour = "black"
        this.gotoAndStop("max")
        speed = 6
        fireRate = 12;
        }
        }

    }

}