// @input Component.ObjectTracking3D leftHand
// @input Component.ObjectTracking3D rightHand

// @input SceneObject heat
// @input SceneObject instructionsBack
// @input SceneObject instructionsFront

// @input SceneObject leftHandPalm
// @input SceneObject rightHandPalm
// @input SceneObject cameraProjection
// @input SceneObject cameraTracking

// @input SceneObject fireball
// @input SceneObject fireballBack0
// @input SceneObject fireballBack1
// @input SceneObject explosionBack0
// @input SceneObject explosionBack1
// @input SceneObject fireballCollision
// @input SceneObject fireballTarget

// @input SceneObject handInstructions
// @input SceneObject pointInstructions

// @input Asset.Texture fireball0Texture
// @input Asset.Texture fireball1Texture
// @input Asset.Texture explosion0Texture
// @input Asset.Texture explosion1Texture

// @input Component.AudioComponent fireballStart
// @input Component.AudioComponent fireballShot
// @input Component.AudioComponent fireballHit



/////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////
//camera

var cameraDirection = 'selfie';

function onSwitchToFrontCamera() {
    cameraDirection = 'selfie';
    
    script.instructionsFront.enabled = true;
    script.instructionsBack.enabled = false;

    script.fireballBack0.enabled = false;
    // script.fireballBack1.enabled = false;
    script.explosionBack0.enabled = false;
    script.explosionBack1.enabled = false;

    fireballHeatStay = false;
    global.tweenManager.stopTween(script.heat, 'world fireball stay');
    global.tweenManager.stopTween(script.heat, 'world fireball shot');
    global.tweenManager.stopTween(script.heat, 'world fireball hit');    
    global.tweenManager.startTween(script.heat, 'off');    
    
}

function onSwitchToBackCamera() {
    cameraDirection = 'world';

    script.instructionsFront.enabled = false;
    script.instructionsBack.enabled = true;    
    
    script.fireballBack0.enabled = true;
    // script.fireballBack1.enabled = true;    
    script.explosionBack0.enabled = true;
    script.explosionBack1.enabled = true;    

    fireballMode = 'waiting';
    script.handInstructions.enabled = false;
    script.pointInstructions.enabled = false;

    handInstructionsCancel();
    pointerInstructionsCancel();
    
    handInstructionsStarted = false;
    handInstructionsShowDelayedEvent = null;
    pointerInstructionsStarted = false;
    pointerInstructionsShowDelayedEvent = null;

    script.fireball0Texture.control.stop();
    script.fireball1Texture.control.stop();

}

script.createEvent('CameraFrontEvent').bind(onSwitchToFrontCamera);
script.createEvent('CameraBackEvent').bind(onSwitchToBackCamera);



/////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////
//hand tracking

var isLeftTracking = false;
var isRightTracking = false;

var leftJoints = {};
var rightJoints = {};
const JOINT_NAMES = ["wrist","thumb-0","thumb-1","thumb-2","thumb-3","index-0","index-1","index-2","index-3","mid-0","mid-1","mid-2","mid-3","ring-0","ring-1","ring-2","ring-3","pinky-0","pinky-1","pinky-2","pinky-3","wrist_to_thumb","wrist_to_index","wrist_to_mid","wrist_to_ring","wrist_to_pinky"];

function onInitialize() {
    for (var i=0; i<JOINT_NAMES.length; i++) {
        leftJoints[JOINT_NAMES[i]] = script.leftHand.createAttachmentPoint(JOINT_NAMES[i]);
        rightJoints[JOINT_NAMES[i]] = script.rightHand.createAttachmentPoint(JOINT_NAMES[i]);
    }
}
onInitialize();

script.leftHand.onTrackingStarted = function() {
    isLeftTracking = true;
};

script.leftHand.onTrackingLost = function() {
    isLeftTracking = false;
};

script.rightHand.onTrackingStarted = function() {
    isRightTracking = true;
};

script.rightHand.onTrackingLost = function() {
    isRightTracking = false;
};

function getJointsPosition(handType, jointNames) {

    if (getActiveHand == null) {
        return;
    }
    
    if (!Array.isArray(jointNames)) {
        if ((handType != "R") && getActiveHand() == "L") {
            return leftJoints[jointNames].getTransform().getWorldPosition();
        } else if (handType != "L" && getActiveHand() == "R") {
            return rightJoints[jointNames].getTransform().getWorldPosition();
        }
    } else {
        var vec3arr = [];
        for (var i=0; i < jointNames.length; i ++) {
            if ((handType != "R") && getActiveHand() == "L") {
                vec3arr.push(leftJoints[jointNames[i]].getTransform().getWorldPosition());
            } else if (handType != "L" && getActiveHand() == "R") {
                vec3arr.push(rightJoints[jointNames[i]].getTransform().getWorldPosition());
            }
        }
    
        return getAverageVec3(vec3arr);
    }

}

function getAverageVec3(vecs) {
    var result = new vec3(0,0,0);
    for (var i=0; i < vecs.length; i ++) {
        result = result.add(vecs[i]);
    }
    result = result.uniformScale(1 / vecs.length);
    return result;
}

function getActiveHand() {
    if (isLeftTracking) {
        return "L";
    } else if (isRightTracking) {
        return "R";
    } else {
        return null;
    }
}

//
global.isLeftHandTracking = function() {
    return isLeftTracking;
};

global.isRightHandTracking = function() {
    return isRightTracking;
};

global.getActiveHand = getActiveHand;
global.getJointsPosition = getJointsPosition;



/////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////
//fireball

var fireballMode = 'waiting'; //waiting,tracking,shooting,done
var fireballTrackingLerp = 0.25;
var fireballHeatStay = false;
var fireballTrackerOffset = 3.5;

var fireballActiveScale = new vec3(1, 1, 1);
var fireballDeactiveScale = new vec3(0, 0, 0);
var fireballScaleLerp = 0.5;

var fireballShootingStart = new vec3(0, 0, 0);
var fireballShootingEnd = new vec3(0, 0, 0);
var fireballShootingLerp = 0.1;
var fireballShootingCollisionDistance = 150;
var fireballShootingCollisionWarmupDistance = 160;
var fireballShootingCollisionWarmupStarted = false;

updateEvent = script.createEvent('UpdateEvent');
updateEvent.bind(function(eventData)
{
    var trackingObject = null;
    var target = null;

    if(global.isRightHandTracking()){
        trackingObject = script.rightHandPalm;
    }
    if(global.isLeftHandTracking()){
        trackingObject = script.leftHandPalm;
    }

    if(cameraDirection == 'world'){
        //world

        if(trackingObject != null){
            //back
            target = trackingObject.getTransform().getWorldPosition();
            target.y += fireballTrackerOffset;               

        }

        if(fireballMode == 'waiting'){
            //waiting for hand

            handInstructionsShow();
            pointerInstructionsCancel();

            if(trackingObject != null){
                fireballMode = 'tracking';
    
                script.fireball.enabled = true;
                script.fireballStart.play(1);
    
                fireballShootingCollisionWarmupStarted = false;
                script.fireball0Texture.control.play(-1,0);
                script.fireball1Texture.control.play(-1,0);
    
                script.fireball.getTransform().setWorldPosition(target);

            }
    
        }else if(fireballMode == 'tracking'){        
            //tracking to hand

            if(!fireballHeatStay){
                fireballHeatStay = true;
                
                global.tweenManager.stopTween(script.heat, 'world fireball stay');
                global.tweenManager.stopTween(script.heat, 'world fireball shot');
                global.tweenManager.stopTween(script.heat, 'world fireball hit');    
                global.tweenManager.stopTween(script.heat, 'off');   

                global.tweenManager.startTween(script.heat, 'world fireball stay');

            }
            
            handInstructionsCancel();
            pointerInstructionsShow();

            if(trackingObject == null){
                target = script.cameraTracking.getTransform().getWorldPosition();
            }
    
            script.fireball.getTransform().setWorldPosition(vec3.lerp(script.fireball.getTransform().getWorldPosition(), target, fireballTrackingLerp));
    
        }else if(fireballMode == 'shooting'){
            //shooting

            handInstructionsCancel();
            pointerInstructionsCancel();

            script.fireball.getTransform().setWorldPosition(vec3.lerp(script.fireball.getTransform().getWorldPosition(), fireballShootingEnd, fireballShootingLerp));
    
            var distance = script.fireball.getTransform().getWorldPosition().distance(fireballShootingEnd);
            if(!fireballShootingCollisionWarmupStarted && distance < fireballShootingCollisionWarmupDistance){        
                fireballShootingCollisionWarmupStarted = true;
    
                script.explosion0Texture.control.play(1,0);
                script.explosion1Texture.control.play(1,0);
                              
                script.fireballHit.play(1);
    
            }
            
            if(distance < fireballShootingCollisionDistance){
                //collision
    
                script.fireballCollision.enabled = true;
                script.fireballCollision.getTransform().setWorldPosition(script.fireball.getTransform().getWorldPosition()); 

                global.tweenManager.stopTween(script.heat, 'world fireball shot');
                global.tweenManager.startTween(script.heat, 'world fireball hit');                  
    
                var delayedEvent = script.createEvent('DelayedCallbackEvent');
                delayedEvent.bind(function(eventData)
                {        
                    script.fireball.enabled = false;
                    fireballMode = 'waiting';
    
                });
                delayedEvent.reset(1);
    
            }
    
        }

    }

});

function onIndexFinger() {
    if(cameraDirection == 'world' && fireballMode == 'tracking'){
        fireballShootingStart = script.fireball.getTransform().getWorldPosition();

        script.fireballTarget.getTransform().setWorldPosition(script.cameraProjection.getTransform().getWorldPosition());
        fireballShootingEnd = script.fireballTarget.getTransform().getWorldPosition();                
        
        script.fireballShot.play(1);                
        
        script.pointInstructions.enabled = false;

        fireballHeatStay = false;
        global.tweenManager.stopTween(script.heat, 'world fireball stay');
        global.tweenManager.startTween(script.heat, 'world fireball shot');
        global.tweenManager.startTween(script.heat, 'world fireball hit');          

        fireballMode = 'shooting';

    }

}
global.behaviorSystem.addCustomTriggerResponse('index_finger_gesture_trigger', onIndexFinger);



/////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////
//instructions

var instructionCounter = 0;
var instructionCounterMax = 2;

var handInstructionsStarted = false;
var handInstructionsShowDelayedEvent = null;

function handInstructionsShow(){
    if(!handInstructionsStarted && instructionCounter < instructionCounterMax){
        handInstructionsStarted = true;

        handInstructionsShowDelayedEvent = script.createEvent('DelayedCallbackEvent');
        handInstructionsShowDelayedEvent.bind(function(eventData)
        {        
            script.handInstructions.enabled = true;
            script.pointInstructions.enabled = false;
        });
        handInstructionsShowDelayedEvent.reset(0.5);
    
    }

}

function handInstructionsCancel(){
    handInstructionsStarted = false;
    script.handInstructions.enabled = false;
    script.removeEvent(handInstructionsShowDelayedEvent);
}

var pointerInstructionsStarted = false;
var pointerInstructionsShowDelayedEvent = null;

function pointerInstructionsShow(){
    if(!pointerInstructionsStarted && instructionCounter < instructionCounterMax){
        pointerInstructionsStarted = true;
        instructionCounter++;

        pointerInstructionsShowDelayedEvent = script.createEvent('DelayedCallbackEvent');
        pointerInstructionsShowDelayedEvent.bind(function(eventData)
        {        
            script.handInstructions.enabled = false;
            script.pointInstructions.enabled = true;
        });
        pointerInstructionsShowDelayedEvent.reset(0.5);

    }

}

function pointerInstructionsCancel(){
    pointerInstructionsStarted = false;
    script.pointInstructions.enabled = false;
    script.removeEvent(pointerInstructionsShowDelayedEvent);

}