// BIG Thanks to tutsplus.com
// http://code.tutsplus.com/tutorials/webgl-with-threejs-basics--net-35688
// for helping me getting started

//Stuff for rendering
var DEG2RAD = Math.PI / 180;
var width, height, renderer, scene, camera;
var clock = new THREE.Clock;
var rotY = 0, rotX = 0;
var matWood = new THREE.MeshLambertMaterial({ color: 0x826841 });
//var matWood = new THREE.MeshLambertMaterial({ color: 0x826841, transparent: true, opacity: 0.5 }); //For testing the mesh alignment
var matStone = new THREE.MeshLambertMaterial({ color: 0xadadad });
var matTransparentStone = new THREE.MeshLambertMaterial({ color: 0xadadad });
matTransparentStone.opacity = 0.8;
matTransparentStone.transparent = true;
var viewCenter = new THREE.Vector3(0,0,0);
// Meshes
// The ones marked with //* are not real meshes, but contain a child (or more) which gets rendered.
// This is done, so these can easily be rotated around an accurate pivot point.
var mBasePlate;
var mBody; //*
var mHead; //*
var mSkull;
var mLegLeft; //*
var mLegRight; //*
var mArmLeft; //*
var mArmRight; //*
var armorstand, armorstandWrapper; //Group all the other elements


//DATA -> Stuff that we'll use to generate the command. Fetched from the controls.
var invisible = false;
var invulnerable = false;
var persistencerequired = false;
var noBasePlate = false;
var noGravity = false;
var showArms = false;
var small = false;

var equipmentMode;
var equipHandRight;
var equipHandLeft;
var equipShoes;
var equipLeggings;
var equipChestplate;
var equipHelmet = "";
var equipCustomHeadMode;
var equipColorShoes;
var equipColorLeggings;
var equipColorChestplate;
var equipColorHelmet;

var useDisabledSlots;

//The rotation values are all in degrees.
var head = new THREE.Vector3(0,0,0);
var body = new THREE.Vector3(0,0,0);
var leftLeg = new THREE.Vector3(0,0,0);
var rightLeg = new THREE.Vector3(0,0,0);
var leftArm = new THREE.Vector3(0,0,0);
var rightArm = new THREE.Vector3(0,0,0);
var rotation = 0;

//Stuff for mouse movements
var mouseDownX;
var mouseDownY;
var mouseMoveX;
var mouseMoveY;
var mouseRotationMultiplier = 0.008;
//A point class will help us manage the mouse movements.
Point = {
	x:null,
	y:null
};

$(document).ready(function(){
	//Init
	setup();
	updateUI();
	render();

	//Stuff to handle and update input
	$("input").on("input", function(){
		handleInput();
	});
	$(':checkbox, #equipCustomHeadMode, #equipmode').change(function() {
    	handleInput();
	});


	//Handle rotating with mouse
	$("#gl")
	.mousedown(function(event){
		mouseDownX = event.pageX;
		mouseDownY = event.pageY;
	})
	.mousemove(function(event){
		mouseMoveX = event.pageX;
		mouseMoveY = event.pageY;
	})
	.mouseup(function(event){
		rotY += getMouseDeltaX();
		rotX += getMouseDeltaY();
		mouseDownX = null;
		mouseDownY = null;
	});

	//Hide elements
	$("#getcommandblock").hide();
	$("#troubleshooting").hide();
	$("#inputarms").hide();
	$("#customequipment").hide();
	$("#disabledslots").hide();

    //Initialize colorpickers
    $('.colorfield').colpick({
        colorScheme:'light',
        layout:'hex',
        color:'ff8800',
        onSubmit:function(hsb,hex,rgb,el) {
            $(el).css('background-color', '#'+hex);
            $(el).colpickHide();
            handleInput();
        }
    });

});

function setup(){
	width = $("#gl").width();
	height = $("#gl").height();

	renderer = new THREE.WebGLRenderer({ antialias: true, alpha:true });
	renderer.setSize(width, height);
	$("#gl").append(renderer.domElement);


	scene = new THREE.Scene();
	armorstand = new THREE.Object3D();
	//Add an armorstandWrapper to the scene, so the armorstand can be rotated naturally.
	armorstandWrapper = new THREE.Object3D();
	armorstand.position.set(0,-0.5,0);
	armorstandWrapper.add(armorstand);


	//BasePlate
	mBasePlate = new THREE.Mesh(
		new THREE.BoxGeometry(12/16, 1/16, 12/16),
		matStone);
	mBasePlate.position.y = - (1/32 - armorstand.position.y);
	armorstandWrapper.add(mBasePlate);
	//Add a little dot, so the user knows which way is forward
	var mmBaseDot = new THREE.Mesh(
		new THREE.BoxGeometry(2/16, 1/16, 4/16),
		matStone);
	mmBaseDot.position.set(0,mBasePlate.position.y,10/16);
	armorstandWrapper.add(mmBaseDot);

	// To Generate the other body parts, we will use a mesh to display,
	// and add it as a child to the object that serves as a pivot.

	//Left Leg
	var mmLegLeft = new THREE.Mesh(
		new THREE.BoxGeometry(2/16, 11/16, 2/16),
		matWood);
	mmLegLeft.position.set(0,-5.5/16,0);
	mLegLeft = new THREE.Object3D();
	mLegLeft.position.set(2/16,11/16,0); //Pivot Point
	mLegLeft.add(mmLegLeft);
	armorstand.add(mLegLeft);

	//Right Leg
	var mmLegRight = new THREE.Mesh(
		new THREE.BoxGeometry(2/16, 11/16, 2/16),
		matWood);
	mmLegRight.position.set(0,-5.5/16,0);
	mLegRight = new THREE.Object3D();
	mLegRight.position.set(-2/16,11/16,0); //Pivot Point
	mLegRight.add(mmLegRight);
	armorstand.add(mLegRight);

	//Left Arm
	var mmArmLeft = new THREE.Mesh(
		new THREE.BoxGeometry(2/16, 12/16, 2/16),
		matWood);
	mmArmLeft.position.set(0,-4/16,0);
	mArmLeft = new THREE.Object3D();
	mArmLeft.position.set(6/16,21/16,0); //Pivot Point
	mArmLeft.add(mmArmLeft);
	armorstand.add(mArmLeft);

	//Right Arm
	var mmArmRight = new THREE.Mesh(
		new THREE.BoxGeometry(2/16, 12/16, 2/16),
		matWood);
	mmArmRight.position.set(0,-4/16,0);
	mArmRight = new THREE.Object3D();
	mArmRight.position.set(-6/16,21/16,0); //Pivot Point
	mArmRight.add(mmArmRight);
	armorstand.add(mArmRight);

	//Body (consists of four parts)
	var mmHip = new THREE.Mesh(
		new THREE.BoxGeometry(8/16, 2/16, 2/16),
		matWood);
	mmHip.position.set(0,-11/16,0);
	var mmBodyLeft = new THREE.Mesh(
		new THREE.BoxGeometry(2/16, 7/16, 2/16),
		matWood);
	mmBodyLeft.position.set(2/16,-6.5/16,0);
	var mmBodyRight = new THREE.Mesh(
		new THREE.BoxGeometry(2/16, 7/16, 2/16),
		matWood);
	mmBodyRight.position.set(-2/16,-6.5/16,0);
	var mmShoulders = new THREE.Mesh(
		new THREE.BoxGeometry(12/16, 3/16, 3/16),
		matWood);
	mmShoulders.position.set(0,-1.5/16,0);
	mBody = new THREE.Object3D();
	mBody.position.set(0,23/16,0); //Pivot Point
	mBody.add(mmHip);
	mBody.add(mmBodyLeft);
	mBody.add(mmBodyRight);
	mBody.add(mmShoulders);
	armorstand.add(mBody);

	//Head (neck and skull)
	var mmNeck = new THREE.Mesh(
		new THREE.BoxGeometry(2/16, 7/16, 2/16),
		matWood);
	mmNeck.position.set(0,3.5/16,0);
	mSkull = new THREE.Mesh(
		new THREE.BoxGeometry(10/16, 10/16, 10/16),
		matTransparentStone);
	mSkull.position.set(0,5/16,0);
	mHead = new THREE.Object3D();
	mHead.position.set(0,22/16,0); //Pivot Point
	mHead.add(mmNeck);
	mHead.add(mSkull);
	armorstand.add(mHead);


	scene.add(armorstandWrapper);

	camera = new THREE.PerspectiveCamera(45, width/height, 0.1, 1000);
	camera.position.y = 2;
	camera.position.z = 4;
	camera.lookAt(viewCenter);
	scene.add(camera);

	var pointLight = new THREE.PointLight(0xffffff);
	pointLight.position.set(0, 300, 200);

	scene.add(pointLight);
}

// Write stuff from input into variables
function handleInput(){

	invisible = getCheckBoxInput("invisible");
	invulnerable = getCheckBoxInput("invulnerable");
    persistencerequired = getCheckBoxInput("persistencerequired");
	noBasePlate = getCheckBoxInput("nobaseplate");
	noGravity = getCheckBoxInput("nogravity");
	showArms = getCheckBoxInput("showarms");
	small = getCheckBoxInput("small");

	equipmentMode = $("#equipmode").val(); // use direct jQuery for dropdowns
	equipHandRight = getInput("equipHandRight");
	equipHandLeft = getInput("equipHandLeft");
	equipShoes = getInput("equipShoes");
	equipLeggings = getInput("equipLeggings");
	equipChestplate = getInput("equipChestplate");
	equipHelmet = getInput("equipHelmet");
	equipCustomHeadMode = $("#equipCustomHeadMode").val();

    equipColorShoes = $("#shoecolor").css("background-color");
    equipColorLeggings = $("#leggingscolor").css("background-color");
    equipColorChestplate = $("#chestplatecolor").css("background-color");
    equipColorHelmet = $("#helmetcolor").css("background-color");

	useDisabledSlots = getCheckBoxInput("usedisabledslots");


	body.set(getRangeInput("bodyX"), getRangeInput("bodyY"), getRangeInput("bodyZ"));
	head.set(getRangeInput("headX"), getRangeInput("headY"), getRangeInput("headZ"));
	leftLeg.set(getRangeInput("leftLegX"), getRangeInput("leftLegY"), getRangeInput("leftLegZ"));
	rightLeg.set(getRangeInput("rightLegX"), getRangeInput("rightLegY"), getRangeInput("rightLegZ"));
	leftArm.set(getRangeInput("leftArmX"), getRangeInput("leftArmY"), getRangeInput("leftArmZ"));
	rightArm.set(getRangeInput("rightArmX"), getRangeInput("rightArmY"), getRangeInput("rightArmZ"));

	rotation = getRangeInput("rotation");

	updateUI();
}
function getCheckBoxInput(name){
	return $("input[name="+name+"]").prop("checked");
}
function getRangeInput(name){
	return $("input[name="+name+"]").val();
}
function getInput(name){
	return $("input[name="+name+"]").val();
}

/** Changes stuff according to our input values */
function updateUI(){

	//Hide/Show different inputs

	if(showArms)
		$("#inputarms").slideDown();
	else
		$("#inputarms").slideUp();

	if(equipmentMode != "none"){
		$("#customequipment").slideDown();
		if(equipmentMode == "1.9"){
			$("#equipHandLeft").show();
		}
		else{
			$("#equipHandLeft").hide();
		}
	}
	else{
		$("#customequipment").slideUp();
	}

    //Different colorinputs for armorparts
    if(isLeatherArmor(equipShoes))
        $("#shoecolor").slideDown();
    else
        $("#shoecolor").slideUp();
    if(isLeatherArmor(equipLeggings))
        $("#leggingscolor").slideDown();
    else
        $("#leggingscolor").slideUp();
    if(isLeatherArmor(equipChestplate))
        $("#chestplatecolor").slideDown();
    else
        $("#chestplatecolor").slideUp();
    if(isLeatherArmor(equipHelmet))
        $("#helmetcolor").slideDown();
    else
        $("#helmetcolor").slideUp();


	if(useDisabledSlots)
		$("#disabledslots").slideDown();
	else
		$("#disabledslots").slideUp();

	$("#code").text(generateCode());
	if(generateCode().length > 100){
		$("#codeinfo").html("<b>Please note:</b> This command is too long to be executed from chat. You need to place it inside a command block. (see below)");
	}


	// Rotate 3D Stuff
	// y and z rotation needs to be inverted
	setRotation(mBody, body);
	setRotation(mHead, head);
	setRotation(mLegLeft, leftLeg);
	setRotation(mLegRight, rightLeg);
	setRotation(mArmLeft, leftArm);
	setRotation(mArmRight, rightArm);
	armorstand.rotation.y = -rotation * DEG2RAD;

    // Scale model, depending on small variable
    if(small)
        armorstand.scale.set(0.6, 0.6, 0.6);
    else
        armorstand.scale.set(1, 1, 1);

	//Set Visibility
	mArmRight.visible = mArmLeft.visible = showArms;
	mBasePlate.visible = !noBasePlate;
	mSkull.visible = equipHelmet != "";
}

function generateCode(){
	var code = "/summon ArmorStand ~ ~ ~ {";

	var tags = [];

	//CheckBoxes
	if(invisible)
		tags.push("Invisible:1b");
	if(invulnerable)
		tags.push("Invulnerable:1b");
    if(persistencerequired)
        tags.push("PersistenceRequired:1b");
	if(noBasePlate)
		tags.push("NoBasePlate:1b");
	if(noGravity)
		tags.push("NoGravity:1b");
	if(showArms)
		tags.push("ShowArms:1b");
	if(small)
		tags.push("Small:1b");

	//Sliders
	if(rotation != 0)
		tags.push("Rotation:["+rotation+"f]");

	//1.8 Equipment
	if(equipmentMode == "1.8"){
		var equip = [];

		equip.push(getHandRightItem());
		equip.push(getShoesItem());
		equip.push(getLeggingsItem());
		equip.push(getChestplateItem());
		equip.push(getHeadItem());

		tags.push("Equipment:["+equip.join(",")+"]");
	}
	// 1.9 Equipment
	else if(equipmentMode == "1.9"){
		var armor = [];

		armor.push(getShoesItem());
		armor.push(getLeggingsItem());
		armor.push(getChestplateItem());
		armor.push(getHeadItem());

		tags.push("ArmorItems:["+armor.join(",")+"]");

		var hands = [];

		hands.push(getHandRightItem());
		hands.push(getHandLeftItem());

		tags.push("HandItems:["+hands.join(",")+"]");
	}

	//DisabledSlots
	if(useDisabledSlots){
		tags.push("DisabledSlots:"+calculateDisabledSlotsFlag());
	}

	//Now the pose
	var pose = [];
	if(!isZero(body))
		pose.push("Body:"+getJSONArray(body));
	if(!isZero(head))
		pose.push("Head:"+getJSONArray(head));
	if(!isZero(leftLeg))
		pose.push("LeftLeg:"+getJSONArray(leftLeg));
	if(!isZero(rightLeg))
		pose.push("RightLeg:"+getJSONArray(rightLeg));
	if(showArms){
		if(!isZero(leftArm))
			pose.push("LeftArm:"+getJSONArray(leftArm));
		if(!isZero(rightArm))
			pose.push("RightArm:"+getJSONArray(rightArm));
	}


	if(pose.length > 0)
		tags.push("Pose:{"+pose.join(",")+"}");

	code += tags.join(",");
	code += "}";
	return code;
}

function getHandRightItem(){
	if(equipHandRight == "") return "{}";
	return "{id:\""+equipHandRight+"\",Count:1b}";
}

function getHandLeftItem(){
	if(equipHandLeft == "") return "{}";
	return "{id:\""+equipHandLeft+"\",Count:1b}";
}

function getShoesItem(){
	if(equipShoes == "") return "{}";
	return "{id:\""+equipShoes+"\",Count:1b"
					+getLeatherColorString($("#shoecolor"), isLeatherArmor(equipShoes))
					+"}";
}

function getLeggingsItem(){
	if(equipLeggings == "") return "{}";
	return "{id:\""+equipLeggings+"\",Count:1b"
					+getLeatherColorString($("#leggingscolor"), isLeatherArmor(equipShoes))
					+"}";
}

function getChestplateItem(){
	if(equipChestplate == "") return "{}";
	return "{id:\""+equipChestplate+"\",Count:1b"
				+getLeatherColorString($("#chestplatecolor"), isLeatherArmor(equipShoes))
				+"}";
}

function getHeadItem(){
	if(equipHelmet == "") return "{}";

	// Use input as item
	if(equipCustomHeadMode == "item"){
		return "{id:\""+equipHelmet+"\",Count:1b"
		+getLeatherColorString($("#helmetcolor"), isLeatherArmor(equipShoes))
		+"}";
	}

	// Use input as player name
	else if(equipCustomHeadMode == "player"){
		return "{id:\"skull\",Count:1b,Damage:3b,tag:{SkullOwner:\""+equipHelmet+"\"}}";
	}

	// Use input as url
	// Best reference: http://redd.it/24quwx
	else if(equipCustomHeadMode == "url"){
		var uuid = generateUUID();
		var base64Value = btoa('{textures:{SKIN:{url:"'+equipHelmet+'"}}}');

		return '{id:"skull",Count:1b,Damage:3b,tag:{SkullOwner:{Id:'+uuid+',Properties:{textures:[{Value:'+base64Value+'}]}}}}';
	}
}

function calculateDisabledSlotsFlag() {
    var dH = $("#dH").is(":checked") ? 1 << (4) : 0;
    var dC = $("#dC").is(":checked") ? 1 << (3) : 0;
    var dL = $("#dL").is(":checked") ? 1 << (2) : 0;
    var dB = $("#dB").is(":checked") ? 1 << (1) : 0;
    var dW = $("#dW").is(":checked") ? 1 << (0) : 0;
    var dR = dH + dC + dL + dB + dW;

    var rH = $("#rH").is(":checked") ? 1 << (4 + 8) : 0;
    var rC = $("#rC").is(":checked") ? 1 << (3 + 8) : 0;
    var rL = $("#rL").is(":checked") ? 1 << (2 + 8) : 0;
    var rB = $("#rB").is(":checked") ? 1 << (1 + 8) : 0;
    var rW = $("#rW").is(":checked") ? 1 << (0 + 8) : 0;
    var rR = rH + rC + rL + rB + rW;

    var pH = $("#pH").is(":checked") ? 1 << (4 + 16) : 0;
    var pC = $("#pC").is(":checked") ? 1 << (3 + 16) : 0;
    var pL = $("#pL").is(":checked") ? 1 << (2 + 16) : 0;
    var pB = $("#pB").is(":checked") ? 1 << (1 + 16) : 0;
    var pW = $("#pW").is(":checked") ? 1 << (0 + 16) : 0;
    var pR = pH + pC + pL + pB + pW;

    var result = dR + rR + pR;
    return result;
}

function isZero(vector){
	return vector.x == 0 && vector.y == 0 && vector.z == 0;
}
function getJSONArray(vector){
	return "["+vector.x+"f,"+vector.y+"f,"+vector.z+"f]";
}

function getMouseDeltaX(){
	var mouseDeltaX = 0;
	if(mouseDownX != null && mouseMoveX != null){
		mouseDeltaX = mouseMoveX - mouseDownX;
	}
	return mouseDeltaX * mouseRotationMultiplier;
}
function getMouseDeltaY(){
	var mouseDeltaY = 0;
	if(mouseDownY != null && mouseMoveY != null){
		mouseDeltaY = mouseMoveY - mouseDownY;
	}
	return mouseDeltaY * mouseRotationMultiplier;
}

function render(){
	renderer.render(scene, camera);

	var deltaTime = clock.getDelta();

	armorstandWrapper.rotation.y = rotY + getMouseDeltaX();
	armorstandWrapper.rotation.x = rotX + getMouseDeltaY();

	requestAnimationFrame(render);
}




// ---- Additional functions

// From here: http://stackoverflow.com/a/8809472/1456971
function generateUUID(){
    var d = new Date().getTime();
    var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        var r = (d + Math.random()*16)%16 | 0;
        d = Math.floor(d/16);
        return (c=='x' ? r : (r&0x3|0x8)).toString(16);
    });
    return uuid;
}

function getDecimalRGB(rgb){
    //The string has the format 'rgb(r, g, b)'

    //Remove whitespaces. Now formatted: 'rgb(r,g,b)'
    rgb = rgb.replace(/ /g,"");

    var r = rgb.substring(4,rgb.indexOf(","));
    var g = rgb.substring(rgb.indexOf(",")+1,rgb.lastIndexOf(","));
    var b = rgb.substring(rgb.lastIndexOf(",")+1, rgb.length-1);


    return (r << 16) | (g << 8) | b;
}

function isLeatherArmor(item){
    if(item == null)
        return false;
    return item.indexOf("leather") == 0;
}

// Pass the colorpicker element as element. If condition is true, it will return a proper datatag for use in items, otherwise it will return an empty string.
function getLeatherColorString(element, condition){
    if(condition){
        var rgb = getDecimalRGB(element.css("background-color"));
        return ",tag:{display:{color:"+rgb+"}}";
    }
    return "";
}

// Rotate three.js mesh to fit the minecraft rotation
function setRotation(mesh, rotation){
	rotateAroundWorldAxis(mesh, new THREE.Vector3(1,0,0), rotation.x * DEG2RAD, true);
	rotateAroundWorldAxis(mesh, new THREE.Vector3(0,1,0), -rotation.y * DEG2RAD, false);
	rotateAroundWorldAxis(mesh, new THREE.Vector3(0,0,1), -rotation.z * DEG2RAD, false);
}

// From here: http://stackoverflow.com/a/11124197/1456971
var rotWorldMatrix;
// Rotate an object around an arbitrary axis in world space
function rotateAroundWorldAxis(object, axis, radians, reset) {
    rotWorldMatrix = new THREE.Matrix4();
    rotWorldMatrix.makeRotationAxis(axis.normalize(), radians);
		if(!reset)
    	rotWorldMatrix.multiply(object.matrix);        // pre-multiply
    object.matrix = rotWorldMatrix;
    object.rotation.setFromRotationMatrix(object.matrix);
}