(function() {
	var dvaID = "{4d37c172-9315-4076-a091-a322d5428535}"; // ID number in edit entity
	var birdSound = SoundCache.getSound("https://hifi-content.s3.amazonaws.com/jimi/personal/sounds/City%20Ambiance.wav");
	//var crowID = "{https://hifi-content.s3.amazonaws.com/jimi/personal/props/crow.fbx}";
	// Array of butterflies
	var butterflies = [];

	this.enterEntity = function(entityID) {		// If you enter the zone, this will trigger
		print("YAY I WALKED INTO THE CUBE");
		// Generate the butterflies
		for (var i = 0; i < numButterflies; i++) {
		    addButterfly();
		};
		// dva appears
		//var props = {
		//	position: {x: -1719.9800, y: -1353.7898, z: -3153.9185
		//Entities.editEntity(dvaID, props);

		// for (var bird = 0; bird < 10; bird++) {
		// 	var randX = Math.random()-0.5	//randInteger(0.1); //Math.random(0.1)
		// 	var randZ = Math.random()-0.5	//randInteger(0.1);
		// 	var randY = Math.random()-0.5;
		// 	Entities.addEntity("model", {
		// 		velocity: {x:0+randX,y:10+randY,z:0+randZ},
		// 		position: { x: -1740.27,y: -1346.5,z: -3141.54},
		// 	    modelURL: "https://hifi-content.s3.amazonaws.com/jimi/personal/props/crow.fbx",
		// 	    //animationURL: "http://bird.fbx"
		// 	    lifetime: 5,
		// 	});
		// };


		// Audio.playSound(birdSound, { position: { x: -1740.27,y: -1346.5,z: -3141.54}, volume: 5});
		Script.setTimeout(0.5, function() {
			// show dva...
			Entities.editEntity(dvaID, {visible: true});
		});
		Script.update.connect(updateButterflies);
	};
	
	this.leaveEntity  = function(entityID) {	// If you leave the zone, this will trigger
		print("YAY I LEFT THE CUBE");
		// dva disappears
		// Entities.editEntity(dvaID, {visible: false});
   		Script.update.disconnect(updateButterflies);
		for (var i = 0; i < numButterflies; i++) {
        	Entities.deleteEntity(butterflies[i]);
   		}
   		// Clear the array
   		butterflies = [];
	};




// Adapting from butterflies.js. WE'll be modifying it to spawn crows instead

print("BUTTERFLIES START");


var numButterflies = 25;


function getRandomFloat(min, max) {
    return Math.random() * (max - min) + min;
}


// Create a random vector with individual lengths between a,b
function randVector(a, b) {
    var rval = { x: a + Math.random() * (b - a), y: a + Math.random() * (b - a), z: a + Math.random() * (b - a) };
    return rval;
}

var startTimeInSeconds = new Date().getTime() / 1000;

var NATURAL_SIZE_OF_BUTTERFLY = { x:0.7, y: 0.2, z: 0.47 };

var lifeTime = 60; // One minute lifespan
var range = 7.0; // Over what distance in meters do you want the flock to fly around
var frame = 0;

var DISTANCE_IN_FRONT_OF_ME = 1.5;
var DISTANCE_ABOVE_ME = 1.5;
var FIXED_LOCATION = false;
var flockPosition = { x: -1738.8, y: -1343.5, z: -3141.54};

// if (!FIXED_LOCATION) {
//     var flockPosition = Vec3.sum(MyAvatar.position,Vec3.sum(
//                         Vec3.multiply(Quat.getFront(MyAvatar.orientation), DISTANCE_ABOVE_ME), 
//                         Vec3.multiply(Quat.getFront(MyAvatar.orientation), DISTANCE_IN_FRONT_OF_ME)));
// } else {
//     var flockPosition = { x: 4999.6, y: 4986.5, z: 5003.5 };
// }

    
// This is our butterfly object
function defineButterfly(entityID, targetPosition) {
    this.entityID = entityID;
    this.targetPosition = targetPosition;
}


function addButterfly() {
    // Decide the size of butterfly 
    var color = { red: 100, green: 100, blue: 100 };
    var size = 0;

    var MINSIZE = 0.01;
    var RANGESIZE = 0.05;
    var maxSize = MINSIZE + RANGESIZE;
    
    size = MINSIZE + Math.random() * RANGESIZE;
    
    var dimensions = Vec3.multiply(NATURAL_SIZE_OF_BUTTERFLY, (size / maxSize));
        
    var GRAVITY = -0.2;
    var newFrameRate = 29 + Math.random() * 30;
    var properties = {
        type: "Model",
        lifetime: lifeTime,
        position: flockPosition,
        rotation: Quat.fromPitchYawRollDegrees(-80 + Math.random() * 20, Math.random() * 360.0, 0.0),
        velocity: { x: 0, y: 0, z: 0 },
        gravity: { x: 0, y: GRAVITY, z: 0 },
        damping: 0.00001,
        dimensions: dimensions,
        color: color,
        animation: { 
            url: "https://hifi-content.s3.amazonaws.com/jimi/personal/props/crow_Anim3.fbx",
            fps: newFrameRate,
            loop: true,
            running: true,
            startAutomatically:true
        },
        modelURL: "https://hifi-content.s3.amazonaws.com/jimi/personal/props/crow_Anim3.fbx"
    };
    butterflies.push(Entities.addEntity(properties));
}



// Main update function
function updateButterflies(deltaTime) {  
    frame++;
    // Only update every third frame because we don't need to do it too quickly
    if ((frame % 3) == 0) {
        // Update all the butterflies
        var CHANCE_OF_IMPULSE = 0.04;
        for (var i = 0; i < numButterflies; i++) {
            if (Math.random() < CHANCE_OF_IMPULSE) {
                var properties = Entities.getEntityProperties(butterflies[i]);
                if (Vec3.length(Vec3.subtract(properties.position, flockPosition)) > range) {
                    Entities.editEntity(butterflies[i], { position: flockPosition } );
                } else if (properties.velocity.y <= 0.0) {
                    //  If falling, Create a new direction and impulse
                    var HORIZ_SCALE = 0.50;
                    var VERT_SCALE = 0.50;
                    var newHeading = Math.random() * 360.0;  
                    var newVelocity = Vec3.multiply(HORIZ_SCALE, Quat.getFront(Quat.fromPitchYawRollDegrees(0.0, newHeading, 0.0))); 
                    newVelocity.y = (Math.random() + 0.5) * VERT_SCALE;
                    Entities.editEntity(butterflies[i], { rotation: Quat.fromPitchYawRollDegrees(-80 + Math.random() * 20, newHeading, (Math.random() - 0.5) * 10), 
                                                    velocity: newVelocity } );
                }
            }
        }
        // Check to see if we've been running long enough that our butterflies are dead
        var nowTimeInSeconds = new Date().getTime() / 1000;
        if ((nowTimeInSeconds - startTimeInSeconds) >= lifeTime) {
            Script.stop();
            return;
        }
    }
}

// register the call back so it fires before each data send
Script.update.connect(updateButterflies);

//  Delete our little friends if script is stopped
Script.scriptEnding.connect(function() {
    for (var i = 0; i < numButterflies; i++) {
        Entities.deleteEntity(butterflies[i]);
    }
});

print("BUTTERFLIES END");

	


});

// For (var) = Making things loop
// Bird++ means add 1 more bird
// Have to look up the codes, this is all currently pseudo code, look into docs
// Script setTimeout means once the script is running, wait x amount of time before running code.
// RandX and RandZ means Random x or z, randInteger(0.1) means it will vary between 0 - 0.1
// Audio.playSound(nameofSoundID, {props}) Can set properties like position of sound, volume, range