let trees = [],
	birds = [],
	clouds = [],
	humans = [],
	ground = [],
	time = 12, // in hours
	cycleTime = 10, // in minutes
	worldWidth = 40000,
	viewPort = {x: Math.round(worldWidth / 2 - window.innerWidth / 2), y: 0, v: 20},
	waveDispo = 0,
	cliffDispo = 25,
	STRAIGHT_GROUND = 0,
	SMALL_HILLS = 1,
	LARGE_HILL = 2,
	LAKE = 3,
	gameIsRunning = false;
	
function setup(){
	setFrameRate(120);
    createCanvas(window.innerWidth, window.innerHeight);
	background(160, 160, 255);
	noStroke();
	$("#saveLink").hide();
	$("#fileBrowser").hide();
	$("#toolBarOpener").hide();
	$("#infoWrapper").hide();
	$("button").on("click", function(){this.blur();});
}

function createWorld(){
	$("#restoreWorld, #createWorld").hide();
	fill(80);
	rect(width * 0.1, height * 0.5 - 25, width * 0.8, 50);
	fill(0, 255, 0);
	let x = 0,
		createProgress = 0,
		y = random(height * 0.7, height * 0.8),
		treeDist = 0,
		a = 0, c = 1, b = 0,
		biome,
		biomeX = 0,
		biomeDistance = 1,
		usedBiomes = [],
		biomes = [STRAIGHT_GROUND, SMALL_HILLS, LARGE_HILL, LAKE],
		isWooden;
	
	function create(){
		//Updating progressbar
		createProgress++;
		rect(width * 0.1, height * 0.5 - 25, width * 0.8 * (createProgress / (worldWidth * 2)), 50);
		
		//Main creating
		if (ground.length < worldWidth){
			//Ground
			let biomeRemainder = (x - biomeX) % biomeDistance;
			if (biomeRemainder == 0){
				biome = random(biomes);
				if (usedBiomes.includes(biome)) biome = random(biomes);
				usedBiomes.push(biome);
				biomeX = x;
				isWooden = biome == LAKE ? false : random([true, false]);
				biomeDistance = round(random(1000, 1500));
				a = 0, c = 1, b = 0;
			}
			switch (biome){
				case STRAIGHT_GROUND:
					a = 0;
					if (y < height * 0.3) a = -1;
					if (y > height * 0.95) a = 1;
					//y = noise(x / 100, y / 100) * height;
					y += random(-0.25 - a, 0.25 - a);
					break;
				case SMALL_HILLS:
					if (biomeRemainder == round(biomeDistance / 12)
					 || biomeRemainder == round(biomeDistance * 5 / 12)
					 || biomeRemainder == round(biomeDistance * 0.75))
						c = -1;
					if (biomeRemainder == round(biomeDistance * 0.25)
					 || biomeRemainder == round(biomeDistance * 7 / 12)
					 || biomeRemainder == round(biomeDistance * 11 / 12))
						c = 1;
					if (y < height * 0.3){
						c = -1;
						b = -0.5;
					}
					else if (y > height * 0.9){
						c = 1;
						b = 0.5;
					}
					else b = 0;
					a -= random(0.005, 0.015) * c;
					y += random(2 * a - b);
					break;
				case LARGE_HILL:
					if (biomeRemainder == round(biomeDistance * 0.25)) c = -1;
					if (biomeRemainder == round(biomeDistance * 0.75)) c = 1;
					if (y < height * 0.3){
						c = -1;
						b = -1;
					}
					else if (y > height * 0.9){
						c = 1;
						b = 1;
					}
					else b = 0;
					a -= random(0.0025, 0.0075) * c;
					y += random(2 * a - b);
					break;
			}
			ground[x] = {y: y, biome: biome, isWooden: isWooden};
			
			//Trees
			let treeH, treeW, valid;
			treeDist++;
			if (isWooden) valid = random(100) < 1 ? true : false;
			if (!isWooden) valid = random(1000) < 0.5 ? true : false;
			treeH = random(height * 0.3, height * 0.5),
			treeW = random(40, 60);
			if (treeDist < treeH * 0.25) valid = false;
			try{if (ground[round(x - treeW / 2)].biome == LAKE || biomeRemainder > biomeDistance - treeW || y - treeH < height * 0.15) valid = false;}
			catch(e){}
			if (valid){
				trees.push(new Tree(x, treeW, treeH));
				treeDist = 0;
			}
			
			//Clouds
			let cloudY, cloudW, cloudH;
			valid = random(1000) < 1 ? true : false;
			if (valid){
				cloudY = random(0, 200),
				cloudW = random(100, 500),
				cloudH = random(50, 80);
				clouds.push(new Cloud(x, cloudY, cloudW, cloudH));
			}
			
			//Birds
			valid = random(1000) < 1 ? true : false;
			if (valid){
				birds.push(new Bird(x));
			}
			
			x++;
		}
		
		//Reset some variables
		if (x == worldWidth){
			x = 0;
			a = 0;
		}
		
		//Ground details
		if (ground.length == worldWidth){
			try{
				if (ground[x].biome != LAKE && ground[x + cliffDispo * 2].biome == LAKE){
					a++;
					ground[x].y += a * a * 0.01;
				}
				else if (ground[x].biome != LAKE && ground[x - cliffDispo * 2].biome == LAKE){
					a--;
					ground[x].y += a * a * 0.01;
				}
				else if (ground[x].biome == LAKE) a = cliffDispo * 2;
				else a = 0;
			}catch(e){}
			x++;
		}
		
		//End progress if bar is full
		if (createProgress == worldWidth * 2){
			clearInterval(interval);
			trees.shuffle();
			clouds.shuffle();
			birds.shuffle();
			$("#toolBarOpener").show();
			gameIsRunning = true;
		}
		if (createProgress < worldWidth * 2){
			setTimeout(create, 0);
		}
	}
	let interval = setInterval(create, 0);
}

function downloadWorld(){
	let newGround = [], 
		newTrees = [], 
		newBirds = [], 
		newClouds= [],
		worldValues = [{time: time, viewPort: {x: viewPort.x, y: viewPort.y}}];
	for (let g of ground) newGround.push({y: round(g.y), b: g.biome, w: g.isWooden ? 1 : 0});
	for (let t of trees) newTrees.push({x: round(t.x), w: round(t.width), h: round(t.height), c: t.color});
	for (let b of birds) newBirds.push({x: round(b.x), y: round(b.y), v: round(b.v * 100) / 100, l: round(b.length)});
	for (let c of clouds) newClouds.push({x: round(c.x), y: round(c.y), w: round(c.width), h: round(c.height), b: round(c.brightness * 100) / 100});
	let str =
	  JSON.stringify(newGround.partitiate(1)) + ", "
	+ JSON.stringify(newTrees.partitiate(1)) + ", "
	+ JSON.stringify(newBirds.partitiate(1)) + ", "
	+ JSON.stringify(newClouds.partitiate(1)) + ", "
	+ JSON.stringify(worldValues);
	let data = 'data:application/json;charset=utf-8,['+ encodeURIComponent(str) + "]";
	$("#saveLink").attr("href", data);
	$("#saveLink")[0].click();
}

function uploadWorld(){
	gameIsRunning = false;
	let files = document.getElementById("fileBrowser").files;
	let fr = new FileReader(), recovery = {ground: ground, trees: trees, birds: birds, clouds: clouds, time: time, viewPort: viewPort};
  	fr.onload = function(e){
		try{
			let data = JSON.parse(e.target.result);
			let newGround = data[0].departitiate();
			let newTrees = data[1].departitiate();
			let newBirds = data[2].departitiate();
			let newClouds = data[3].departitiate();
			
			ground = [], trees = [], birds = [], clouds = [];
			
			for (let g of newGround) ground.push({y: g.y, biome: g.b, isWooden: g.w == 1 ? true : false});
			for (let t of newTrees){
				let i = newTrees.indexOf(t);
				trees.push(new Tree(t.x, t.w, t.h));
				trees[i].color = t.c;
			}
			for (let b of newBirds){
				let i = newBirds.indexOf(b);
				birds.push(new Bird(b.x));
				birds[i].y = b.y;
				birds[i].v = b.v;
				birds[i].length = b.l;
			}
			for (let c of newClouds){
				let i = newClouds.indexOf(c);
				clouds.push(new Cloud(c.x, c.y, c.w, c.h));
				clouds[i].brightness = c.b;
			}

			time = data[4][0].time;
			viewPort = {x: data[4][0].viewPort.x, y: data[4][0].viewPort.y, v: recovery.viewPort.v};
			$("#restoreWorld, #createWorld").hide();
			$("#toolBarOpener").show();
			
		} catch(e){
			ground = recovery.ground;
			trees = recovery.trees;
			birds = recovery.birds;
			clouds = recovery.clouds;
			time = recovery.time;
			viewPort = recovery.viewPort;
			waveDispo = recovery.waveDispo;
			window.alert("Data is damaged!");
		}
		
		if (ground.length > 0) gameIsRunning = true;
		else {$("#restoreWorld, #createWorld").show();}
	}
	fr.readAsText(files.item(0));
}

function draw(){
	if (gameIsRunning){
		clear();
		translate(-viewPort.x, -viewPort.y);
		updateUnits();
		updateGround();
		updateTime();
		checkViewPort();
	}
}

function updateUnits(){
	//Sky
	background(160, 160, 255);
	
	//Clouds
	for (let c of clouds){
		c.move();
		c.show();
	}
	
	//Birds
	for (let b of birds){
		b.move();
		b.show();
	}
	
	//Trees
	for (let t of trees){
		t.show();
	}
	
	//Humans
	for (let h of humans){
		h.move();
		h.show();
	}
}

function updateGround(){
	let x, y, lake = false, grassH = 20, waveH = 2;
	waveDispo += 1;
	waveDispo %= 8 * PI;
	function wave(x){
		return sin((0.25 * (x - waveDispo))) * 3;
	}
	
	// grass
	fill(100, 200, 100);
	beginShape();
	for (x = viewPort.x; x <= viewPort.x + width; x++){
		//console.log(x);
		let g = ground[x];
		if (g.biome == LAKE)
			vertex(x, height);
		else
			vertex(x, g.y);
	}
	for (x = viewPort.x + width; x >= viewPort.x; x--){
		let g = ground[x];
		if (g.biome == LAKE)
			vertex(x, height);
		else
			vertex(x, g.y + grassH);
	}
	endShape();
	
	// water
	fill(100, 100, 255);
	beginShape();
	for (x = viewPort.x; x <= viewPort.x + width; x++){
		let g = ground[x];
		if (g.biome == LAKE)
			vertex(x, g.y + grassH / 2 + waveH + cliffDispo + wave(x));
		else
			vertex(x, height);
	}
	for (x = viewPort.x + width - 1; x >= viewPort.x; x--){
		vertex(x, height);
	}
	endShape();
	
	// water --> waves
	fill(50, 50, 255);
	beginShape();
	for (x = viewPort.x; x <= viewPort.x + width; x++){
		let g = ground[x];
		if (g.biome == LAKE)
			vertex(x, g.y + grassH / 2 + cliffDispo + wave(x));
		else
			vertex(x, height);
	}
	for (x = viewPort.x + width - 1; x >= viewPort.x; x--){
		let g = ground[x];
		if (g.biome == LAKE)
			vertex(x, g.y + grassH / 2 + cliffDispo + wave(x) + waveH);
		else
			vertex(x, height);
	}
	endShape();
	
	// dirt
	fill(80, 60, 40);
	beginShape();
	for (x = viewPort.x; x <= viewPort.x + width; x++){
		let g = ground[x];
		if (g.biome == LAKE)
			vertex(x, height);
		else
			vertex(x, g.y + grassH);
	}
	for (x = viewPort.x + width; x >= viewPort.x; x--){
		vertex(x, height);
	}
	endShape();
}

function updateTime(){
	function getDayBrightness(){
		let value = sin(PI / 12 * (time - 8)) + 0.25;
		value = value > 1 ? 1 : value;
		value = value < 0.1 ? 0.1 : value;
		return value;
	}
	let timeTick = 24 / (60 * cycleTime * frameRate());
	time += (timeTick == Infinity ? 0 : timeTick);
	fill(0, 0, 0, 255 - 255 * getDayBrightness());
	rect(viewPort.x, viewPort.y, width, height);
}

function checkViewPort(){
	let scrollBegin = 100;
	if (winMouseX <= scrollBegin && viewPort.x > 0) 
		viewPort.x -= round(viewPort.v * (scrollBegin - winMouseX) / scrollBegin);
	if (winMouseX >= width - scrollBegin && viewPort.x < worldWidth - width - viewPort.v) 
		viewPort.x += round(viewPort.v * (winMouseX - (width - scrollBegin)) / scrollBegin);
	if (viewPort.x < 0) viewPort.x = 0;
	if (viewPort.x >= worldWidth + width) viewPort.x = worldWidth - width - 1;
}

function togglePause(obj){
	gameIsRunning = !gameIsRunning;
	if (gameIsRunning) $(obj).html("||");
	else $(obj).html("►");
}

function toggleToolBar(obj){
	if ($(obj).css("top") == "0px"){
		$(obj).animate({top: 103}, {top: "easeOut"});
		$("#toolBar").animate({top: 0}, {top: "easeOut"});
	}
	if ($(obj).css("top") == "103px"){
		$(obj).animate({top: 0}, {top: "easeOut"});
		$("#toolBar").animate({top: -103}, {top: "easeOut"});
	}
}

function toggleInfo(){
	$("#pauseButton")[0].click();
	$("#infoWrapper").toggle();
}

Array.prototype.departitiate = function(){
	let newArr = [];
	for (let i = 0; i < this.length; i++){
		let a = this[i];
		for (let j = 0; j < a.length; j++){
			let object = a[j];
			newArr.push(object);
			//for (let k = 0; k < b.length; k++){}
		}
	}
	return newArr;
}