/*
pollFunc(function() {

  var movedBlocks = [];
  for (var i = 0; i < world.length; i++) {
    if (world[i].id == 5) {
      movedBlocks.push(world[i]);
      setBlock(world[i].x, world[i].y, 1, true);

      if (getBlock(world[i].x+1, world[i].y)[0].id == 8) {
        for (var j = 0; j < world.length; j++) {
          if (c.distance(world[i].x, world[i].y, world[j].x, world[j].y) < 10) {
            if (c.random(0, 1) == 1) {
              setBlock(world[j].x, world[j].y, 7, false);
            }
          }
        }
      }
    }
  }

  for (var i = 0; i < movedBlocks.length; i++) {
    setBlock(movedBlocks[i].x+1, movedBlocks[i].y, 5, false);
  }

}, 1000*40, 1000);
*/


var c = new GameCanvas('gc');
c.setsize(window.innerWidth, window.innerHeight);
c.hideScrollBar();
document.getElementById('gc').style.visibility = "visible";
document.getElementById('text').style.visibility = "hidden"; 
document.getElementById('text').style.fontSize = "1px";

var width = c.width;
var height = c.height;
var keys = [100];
var mouse = {x: 0, y: 0, right: false};
var scroll = "";
var centerX = width/2;
var centerY = height/2;
var tick = 0;
var isIpad = navigator.userAgent.match(/iPad/i) != null;

var world = [];
var worldInfo = {width: 500,
                 height: 40};
var blockSize = 50;
var screenMiddle = {x: width/2,
                    y: height/2};

var player = {x: 0,
              y: 3,
              width: 1,
              height: 2,
              velo: 0,
              img: 0};
var gravity = 0.01;

var camera = {x: 0,
              y: 0};

var inv = [];
for (var i = 0; i < 9; i++) {
  inv.push({id: 0, amount: 0, wall: false});
}

var invSel = 1;
var invScrollKey = true;
var placeKey = true;

var idInfo = [100];
idInfo[1] = {id: 1, name: "Air", color: "lightblue", image: "http://0.tqn.com/d/desktoppub/1/S/b/k/3/swatch-lightcyan.png"};
idInfo[2] = {id: 2, name: "Grass", color: "rgb(101, 64, 23)", image: "https://aaserver.net/images/grass.png"};
idInfo[3] = {id: 3, name: "Dirt", color: "rgb(101, 64, 23)", image: "https://aaserver.net/images/dirt.png"};
idInfo[4] = {id: 4, name: "Log", color: "rgb(72, 40, 9)", image: "https://aaserver.net/images/tree.png"};
idInfo[5] = {id: 5, name: "Wood", color: "rgb(221, 178, 140)", image: "https://aaserver.net/images/wood.jpg" /*"http://orig07.deviantart.net/d03e/f/2008/148/c/3/wood_floor_by_gnrbishop.jpg"*/};
idInfo[6] = {id: 6, name: "Work table", color: "rgb(187, 161, 80)", image: "https://aaserver.net/images/workbench.png"};
idInfo[7] = {id: 7, name: "Ice", color: "rgb(218, 220, 240)", image: "https://aaserver.net/images/snow.jpg"/*"http://bgfons.com/upload/snow_texture1556.jpg"*/};
idInfo[8] = {id: 8, name: "Cobble", color: "rgb(154, 154, 154)", image: "https://aaserver.net/images/cobble.png"};
idInfo[9] = {id: 9, name: "Stone block", color: "rgb(78, 78, 78)", image: "https://aaserver.net/images/stone_brick.png"};
idInfo[10] = {id: 10, name: "Leaves", color: "rgb(36, 152, 15)", image: "https://aaserver.net/images/leaves.png"};
idInfo[11] = {id: 11, name: "CMD line", color: "rgb(36, 152, 15)", image: "http://static.planetminecraft.com/files/resource_media/screenshot/1252/dYBGH_4521120_lrg.jpg"};
idInfo[12] = {id: 12, name: "PickBreaker", color: "rgb(87, 87, 87)", image: "https://aaserver.net/images/bedrock.jpg"/*"https://ih1.redbubble.net/image.258051353.4077/flat,800x800,070,f.u4.jpg"*/};

for (var i = 1; i < idInfo.length; i++) {
  if (idInfo[i].id != i) {
    alert("The game has crashed!\nError in idInfo array. Id's don't match!");
  }
}

var stars = [];
for (var i = 0; i < 300; i++) {
  stars.push({x: c.random(0, width),
              y: c.random(0, height),
              size: c.random(1, 5),
              blinkSpeed: c.random(0.03, 0.1)});
}

var crafting = false;
var craftKey = true;
var craftScroll = 1;
var craftMode = 1;
var craftingList = [];
craftingList.push({in: [2], out: {block: 2, wall: true}});
craftingList.push({in: [3], out: {block: 3, wall: true}});
craftingList.push({in: [4], out: {block: 4, wall: true}});
craftingList.push({in: [5], out: {block: 5, wall: true}});
craftingList.push({in: [6], out: {block: 6, wall: true}});
craftingList.push({in: [7], out: {block: 7, wall: true}});
craftingList.push({in: [8], out: {block: 8, wall: true}});
craftingList.push({in: [9], out: {block: 9, wall: true}});
craftingList.push({in: [10], out: {block: 10, wall: true}});
craftingList.push({in: [4], out: {block: 4, wall: false}});
craftingList.push({in: [10], out: {block: 10, wall: false}});

craftingList.push({in: [4], out: {block: 5, wall: false}});
craftingList.push({in: [3, 3], out: {block: 8, wall: false}});
craftingList.push({in: [8, 8], out: {block: 9, wall: false}});

var cmd = false;
var CmdPrompt = false;
var command = "";
var thisCMDBlock = {x: 0, y: 0};

var menu = true;

if (!generateWorld(worldInfo.width, worldInfo.height, blockSize, 3)) {
  alert("Cannot generate world!\nTry to reload the page!");
}
else {
  for (var i = -worldInfo.width/2+20; i < worldInfo.width/2-20; i++) {
    if (c.random(0, 10) == 1)
      tree(i, 2);
  }
  for (var i = -worldInfo.width/2+100; i < worldInfo.width/2-100; i++) {
    if (c.random(0, 40) == 1)
      mountain(i, 3);
  }
  pickUp(6, false);
  /*pickUp(11, false);
  for (var i = 0; i < 900; i++)
  pickUp(7, false);*/
  
  if (!localStorage.world) {
    localStorage.world = JSON.stringify(world);
  }
  
  if (!localStorage.inv) {
    localStorage.inv = JSON.stringify(inv);
  }
}

document.addEventListener('contextmenu', event => event.preventDefault());
loop();
function loop() {
  // drawVoid();
  c.rect(0, 0, width, height, "lightblue");
  drawWorld();
  drawPlayer();
  // drawCoordSys();
  inventory();
  craftingF();
  cmdF();
  
  if (tick % 400 == 0 && tick != 0 && !menu) {
    console.log("Saving...");
    localStorage.world = JSON.stringify(world);
    localStorage.inv = JSON.stringify(inv);
    console.log("World saved!");
  }
  
  if (inv[invSel-1].id == 0 && isIpad) {
    if (mouse.x < width/2 && mouse.click) {
      keys[37] = true;
    }
    else if (mouse.x > width/2 && mouse.click) {
      keys[39] = true;
    }
    else {
      keys = [100];
    }
  }
  
  if (menu)
    menuF();
  
  if (isIpad) {
    if (mouse.click && getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5)[0].id == 1 && inv[invSel-1].amount >= 1 && !crafting && !menu && mouse.y < height-100) {
    if (placeKey) {
      setBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5, inv[invSel-1].id, false);
      inv[invSel-1].amount--;
      placeKey = false;
    }
  }
  else if (!mouse.click) {
    placeKey = true;
  }
    
    if (mouse.click && getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5)[0].id != 1 && !crafting && !menu && inv[invSel-1].id != 0 && mouse.y < height-100) {
    if (placeKey) {
      pickUp(getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5)[0].id, getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5)[0].wall);
      setBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5, 1, false);
      placeKey = false;
    }
  }
  else if (!mouse.click) {
    placeKey = true;
  }
  }
  
  tick++;
  requestAnimationFrame(loop);
}

function menuF() {
  c.rect(width/2-300, 175, 600, height-175-100, "lightgray");
  c.picture(width/2-125/2, 150/2-125/2, "https://aaserver.net/images/diamond.png", 125, 125);
  c.text(width/2-125/2-80, 150/2+125/2-20, 120, "B", "black");
  c.text(width/2+125/2, 150/2+125/2-20, 120, "M", "black");
  c.text(width/2+125/2+100, 150/2+125/2-20, 60, "s", "black");
  c.text(width/2-125/2-30, 150, 40, "BlockMines", "gray");
  
  c.rect(width/2-125+10, 260, 250, 100, "darkblue");
  c.rect(width/2-125, 250, 250, 100, "blue");
  
  c.rect(width/2-125+10, 250+100+20+10, 250, 100, "darkblue");
  c.rect(width/2-125, 250+100+20, 250, 100, "blue");
  
  c.ctx.textAlign = "center";
  c.text(width/2, 325, 60, "START", "darkblue");
  c.text(width/2, 325+120, 60, "RESET", "darkblue");
  c.ctx.textAlign = "left";
  
  if (mouse.x > width/2-125 && mouse.x < width/2-125+250 && mouse.y > 250 && mouse.y < 250+100 && mouse.click) {
    invSel = 5;
    menu = false;
    world = JSON.parse(localStorage.world);
    inv = JSON.parse(localStorage.inv);
  }
  
  if (mouse.x > width/2-125 && mouse.x < width/2-125+250 && mouse.y > 250+120 && mouse.y < 250+120+100 && mouse.click) {
    if (confirm("Are you sure you want to delete the world?")) {
      localStorage.removeItem("world");
      localStorage.removeItem("inv");
      menu = false;
      invSel = 5;
    }
    else {
      mouse.x = 0;
      mouse.y = 0;
      mouse.click = false;
    }
  }
}

function drawVoid() {
  c.rect(0, 0, width, height, "black");
  var i;
  var ii = stars.length;
  
  for (i = 0; i < ii; i++) {
    if (stars[i].size >= 5 || stars[i].size <= 1)
      stars[i].blinkSpeed = -stars[i].blinkSpeed;
    
    stars[i].size += stars[i].blinkSpeed;
    if (stars[i].size <= 0) {
      stars[i].size = 1;
    }
    c.circle(stars[i].x, stars[i].y, stars[i].size, "rgba(255, 255, 255, 0.6)");
  }
}

function drawWorld() {
  var i;
  
  var wh = worldInfo.height;
  var d;
  var b;
  
  d = wh*worldInfo.width/2+Math.floor(camera.x)*wh-wh*Math.floor(width/2/blockSize)-wh;
  b = wh*worldInfo.width/2-Math.floor(camera.x)*wh-wh*Math.floor(width/2/blockSize)-wh*3;
  
  var ii = world.length-b;
  
  for (i = d; i < ii; i++) {
    var thisBlock = world[i];
    if (!thisBlock) {
      continue;
    }
    
    var thisX = thisBlock.x*blockSize-(blockSize/2)-camera.x*blockSize;
    var thisY = thisBlock.y*blockSize-(blockSize/2)-camera.y*blockSize;

    const z = 94;
    var p = point(thisX+blockSize, thisY, z);
    var p2 = point(thisX+blockSize, thisY+blockSize, z);
    var p3 = point(thisX, thisY, z);
    var p4 = point(thisX, thisY+blockSize, z);
    
    if (thisBlock.id != 1) {
      const baseColor = idInfo[thisBlock.id].color;
      const rgb = baseColor.split("(")[1].split(")")[0].split(",");
      
      // c.ctx.fillStyle = idInfo[thisBlock.id].color;
      
      if (!thisBlock.wall) {
        //Up
        let b = getBlock(thisBlock.x, thisBlock.y - 1);
        if (!b || b[0].id == 1 || b[0].wall) {
          c.ctx.fillStyle = `rgb(${rgb[0]}, ${rgb[1]}, ${rgb[2]})`;

          c.ctx.beginPath();
          c.ctx.moveTo(thisX+centerX, thisY+centerY);
          c.ctx.lineTo(p3.x, p3.y);
          c.ctx.lineTo(p.x, p.y);
          c.ctx.lineTo(thisX+centerX+blockSize, thisY+centerY);
          c.ctx.lineTo(thisX+centerX, thisY+centerY);
          c.ctx.fill();
        }

        //Down
        b = getBlock(thisBlock.x, thisBlock.y + 1);
        if (!b || b[0].id == 1 || b[0].wall) {
          c.ctx.fillStyle = `rgb(${Math.floor(rgb[0] * 0.5)}, ${Math.floor(rgb[1] * 0.5)}, ${Math.floor(rgb[2] * 0.5)})`;

          c.ctx.beginPath();
          c.ctx.moveTo(thisX+centerX, thisY+centerY+blockSize);
          c.ctx.lineTo(p4.x, p4.y);
          c.ctx.lineTo(p2.x, p2.y);
          c.ctx.lineTo(thisX+centerX+blockSize, thisY+centerY+blockSize);
          c.ctx.lineTo(thisX+centerX, thisY+centerY+blockSize);
          c.ctx.fill();
        }

        //Left
        b = getBlock(thisBlock.x + 1, thisBlock.y);
        if (!b || b[0].id == 1 || b[0].wall) {
          c.ctx.fillStyle = `rgb(${Math.floor(rgb[0] * 0.75)}, ${Math.floor(rgb[1] * 0.75)}, ${Math.floor(rgb[2] * 0.75)})`;

          c.ctx.beginPath();
          c.ctx.moveTo(thisX+blockSize+centerX, thisY+centerY);
          c.ctx.lineTo(p.x, p.y);
          c.ctx.lineTo(p2.x, p2.y);
          c.ctx.lineTo(thisX+centerX+blockSize, thisY+centerY+blockSize);
          c.ctx.lineTo(thisX+centerX+blockSize, thisY+centerY);
          c.ctx.fill();
        }

        //Right
        b = getBlock(thisBlock.x - 1, thisBlock.y);
        if (!b || b[0].id == 1 || b[0].wall) {
          c.ctx.fillStyle = `rgb(${Math.floor(rgb[0] * 0.9)}, ${Math.floor(rgb[1] * 0.9)}, ${Math.floor(rgb[2] * 0.9)})`;

          c.ctx.beginPath();
          c.ctx.moveTo(thisX+centerX, thisY+centerY);
          c.ctx.lineTo(p3.x, p3.y);
          c.ctx.lineTo(p4.x, p4.y);
          c.ctx.lineTo(thisX+centerX, thisY+centerY+blockSize);
          c.ctx.lineTo(thisX+centerX, thisY+centerY);
          c.ctx.fill();
        }
      }
      
      // Back
      if (thisBlock.wall) {
        c.picture(p3.x, p3.y, idInfo[thisBlock.id].image, p2.x - p3.x + 1, p2.y - p.y + 1);
        
        c.ctx.fillStyle = "rgba(0, 0, 0, 0.3)";
        c.ctx.beginPath();
        c.ctx.moveTo(p.x + 1, p.y);
        c.ctx.lineTo(p2.x + 1, p2.y + 1);
        c.ctx.lineTo(p4.x, p4.y + 1);
        c.ctx.lineTo(p3.x, p3.y);
        c.ctx.lineTo(p.x + 1, p.y);
        c.ctx.fill();
      }
    }
    else {
      let roofId;
      for (let j = 1; j < 10; j++) {
        const block = getBlock(thisBlock.x, thisBlock.y - j);
        if (block && !block[0].wall && (block[0].id == 2 || block[0].id == 3 || block[0].id == 7 || block[0].id == 8)) {
          roofId = block[0].id == 2 ? 3 : block[0].id;
          break;
        }
      }
      
      if (roofId) {
        // c.ctx.fillStyle = idInfo[roofId].color;
        // c.ctx.beginPath();
        // c.ctx.moveTo(p.x + 1, p.y);
        // c.ctx.lineTo(p2.x + 1, p2.y + 1);
        // c.ctx.lineTo(p4.x, p4.y + 1);
        // c.ctx.lineTo(p3.x, p3.y);
        // c.ctx.lineTo(p.x + 1, p.y);
        // c.ctx.fill();
        
        c.picture(p3.x, p3.y, idInfo[roofId].image, p2.x - p3.x + 1, p2.y - p.y + 1);
        
        c.ctx.fillStyle = "rgba(0, 0, 0, 0.5)";
        c.ctx.beginPath();
        c.ctx.moveTo(p.x + 1, p.y);
        c.ctx.lineTo(p2.x + 1, p2.y + 1);
        c.ctx.lineTo(p4.x, p4.y + 1);
        c.ctx.lineTo(p3.x, p3.y);
        c.ctx.lineTo(p.x + 1, p.y);
        c.ctx.fill();
      }
    }
  }
  
  var ii = world.length-b;
  
  for (i = d; i < ii; i++) {
    var thisBlock = world[i];
    
    if (thisBlock && thisBlock.id != 1 && !thisBlock.wall) {
      //c.rect(screenMiddle.x+thisBlock.x*blockSize-(blockSize/2)-camera.x*blockSize, screenMiddle.y+thisBlock.y*blockSize-(blockSize/2)-camera.y*blockSize, blockSize+1, blockSize+1, idInfo[thisBlock.id].color);

      var thisX = screenMiddle.x+thisBlock.x*blockSize-(blockSize/2)-camera.x*blockSize;
      var thisY = screenMiddle.y+thisBlock.y*blockSize-(blockSize/2)-camera.y*blockSize;

      c.rect(thisX, thisY, blockSize+1, blockSize+1, idInfo[thisBlock.id].color);
      c.picture(thisX, thisY, idInfo[thisBlock.id].image, blockSize+1, blockSize+1);
      if (thisBlock.wall) {
        c.rect(thisX, thisY, blockSize, blockSize, "rgba(0, 0, 0, 0.3)");
      }
    }
  }
}

function drawPlayer() {
  //c.circle(screenMiddle.x+player.x*blockSize-blockSize/2-camera.x*blockSize, screenMiddle.y+player.y*blockSize-blockSize/2-camera.y*blockSize, player.width*blockSize/2, "red");
  
  if (player.img == 0)
    c.picture(screenMiddle.x+player.x*blockSize-blockSize/2-camera.x*blockSize-blockSize/2, screenMiddle.y+player.y*blockSize-blockSize/2-camera.y*blockSize-player.height*blockSize, "https://aaserver.net/images/me1.png", player.width*blockSize, player.height*blockSize);
  else if (player.img == 1)
    c.picture(screenMiddle.x+player.x*blockSize-blockSize/2-camera.x*blockSize-blockSize/2, screenMiddle.y+player.y*blockSize-blockSize/2-camera.y*blockSize-player.height*blockSize, "https://aaserver.net/images/me2.png", player.width*blockSize, player.height*blockSize);
  else if (player.img == 2)
    c.picture(screenMiddle.x+player.x*blockSize-blockSize/2-camera.x*blockSize-blockSize/2, screenMiddle.y+player.y*blockSize-blockSize/2-camera.y*blockSize-player.height*blockSize, "https://aaserver.net/images/me3.png", player.width*blockSize, player.height*blockSize);
  
  if (keys[37] && !menu)
    player.x -= 0.1;
  if (keys[39] && !menu)
    player.x += 0.1;
  
  if (keys[37] && !menu)
    player.img = 1;
  else if (keys[39] && !menu)
    player.img = 2;
  else
    player.img = 0;
  
  if (player.x > camera.x)
    camera.x += 0.09;
  if (player.x < camera.x)
    camera.x -= 0.09;  
  
  if (player.y > camera.y)
    camera.y += player.velo;
  if (player.y < camera.y)
    camera.y -= player.velo;
  
  player.y += player.velo;
  player.velo += 0.01;
  
  if (getBlock(player.x, player.y)[0].id != 1 && getBlock(player.x, player.y)[0].wall == false) {
    player.velo = 0;
    if (keys[38] && !menu && !crafting) {
      player.velo -= 0.2;
    }
  }
  
  if (getBlock(player.x-0.5, player.y-0.5)[0].id != 1 && keys[37] && getBlock(player.x-0.5, player.y-0.5)[0].wall == false) {
    player.x += 0.1;
    
    if (getBlock(player.x, player.y)[0].id != 1 && getBlock(player.x, player.y)[0].wall == false && isIpad) {
      player.velo -= 0.2;
    }
  }
  if (getBlock(player.x+0.5, player.y-0.5)[0].id != 1 && keys[39] && getBlock(player.x+0.5, player.y-0.5)[0].wall == false) {
    player.x -= 0.1;
    
    if (getBlock(player.x, player.y)[0].id != 1 && getBlock(player.x, player.y)[0].wall == false && isIpad) {
      player.velo -= 0.2;
    }
  }
  /*if (getBlock(player.x, player.y-0.5)[0].id != 1 && keys[32]) {
    player.y -= player.velo;
  }*/
}

function inventory() {
  c.rect(width/2-25-4*55-5, height-80, (25+4*55)*2+10, 60, "lightgray");
  for (var i = 0; i < 5; i++) {
    c.rect(width/2-25-i*55, height-75, 50, 50, "gray");
    
    if (mouse.x > width/2-25-i*55 && mouse.x < width/2-25-i*55+50 && mouse.y > height-75 && mouse.y < height-75+50 && mouse.click) {
      invSel = 5-i;
    }
  }
  for (var i = 1; i < 5; i++) {
    c.rect(width/2-25+i*55, height-75, 50, 50, "gray");
    
    if (mouse.x > width/2-25+i*55 && mouse.x < width/2-25+i*55+50 && mouse.y > height-75 && mouse.y < height-75+50 && mouse.click) {
      invSel = 5+i;
    }
  }
  
  c.rect(width/2-25-4*55-5+(invSel-1)*55, height-80, 60, 60, "black");
  
  for (var i = 0; i < inv.length; i++) {
    if (inv[i].id != 0) {
      c.picture(width/2-25-4*55+i*55, height-75, idInfo[inv[i].id].image, 50, 50);
      c.rect(width/2-25-4*55+i*55, height-75, 50, 50, inv[i].wall ? "rgba(0, 0, 0, 0.3)" : "rgba(0, 0, 0, 0)");
      
      c.text(width/2-25-4*55+i*55+5, height-53, 20, inv[i].amount, "white");
    }
    
    if (inv[i].amount <= 0)
      inv[i].id = 0;
  }
  
  
  for (var i = 0; i < 9; i++) {
    if (keys[49+i] && !menu)
      invSel = 1+i;
  }
  
  var b = getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5);
  if (mouse.click && b && b[0].id == 1 && inv[invSel-1].amount >= 1 && !crafting && !menu && !cmd) {
    if (placeKey) {
      setBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5, inv[invSel-1].id, inv[invSel-1].wall);
      inv[invSel-1].amount--;
      placeKey = false;
    }
  }
  else if (!mouse.click) {
    placeKey = true;
  }
  
  if (mouse.right && getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5) && getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5)[0].id != 1 /*&& getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5)[0].id != 6*/ && !crafting && !menu && !cmd && getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5)[0].id != 12) {
    if (placeKey) {
      pickUp(getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5)[0].id, getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5)[0].wall);
      setBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5, 1, false);
      placeKey = false;
    }
  }
  else if (!mouse.click) {
    placeKey = true;
  }
}

function cmdF() {
  if (mouse.click && getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x, (mouse.y-screenMiddle.y)/blockSize+camera.y) && getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x, (mouse.y-screenMiddle.y)/blockSize+camera.y)[0].id == 11) {
    cmd = true;
    thisCMDBlock = {x: (mouse.x-screenMiddle.x)/blockSize+camera.x, y: (mouse.y-screenMiddle.y)/blockSize+camera.y};
  } 
  
  if (cmd) {
    c.rect(width/2-300, 100, 600, height-100-100, "lightgray");
    c.rect(width/2+300-30-10+5, 110+5, 30, 30, "darkred");
    c.rect(width/2+300-30-10, 110, 30, 30, "red");
    
    if ((mouse.x > width/2+300-30-10 && mouse.x < width/2+300-30-10+30 && mouse.y > 110 && mouse.y < 140 && mouse.click) || keys[27]) {
      cmd = false;
      document.getElementById('command').style.visibility = "hidden";
      document.getElementById('command').value = getBlock(thisCMDBlock.x, thisCMDBlock.y)[0].cmd ? getBlock(thisCMDBlock.x, thisCMDBlock.y)[0].cmd : "";
    }
    
    if (CmdPrompt) {
      document.getElementById('command').style.visibility = "visible";
      document.getElementById('command').style.left = width/2-300 + "px";
      document.getElementById('command').style.top = 150 + "px";
      CmdPrompt = false;
    }
    
    command = document.getElementById('command').value;
    
    c.rect(width/2-75+10, 430+10, 150, 75, "darkblue");
    c.rect(width/2-75, 430, 150, 75, "blue");
    c.ctx.textAlign = "center";
    c.text(width/2, 490, 50, "RUN", "darkblue");
    c.ctx.textAlign = "left";
    
    if (mouse.x > width/2-75 && mouse.x < width/2+75 && mouse.y > 430 && mouse.y < 430+75 && mouse.click) {
      try {
        eval(command);
      }
      catch(e) {
        alert(e);
      }
      world[getBlock(thisCMDBlock.x, thisCMDBlock.y)[1]].cmd = command;
      cmd = false;
      document.getElementById('command').style.visibility = "hidden";
    }
  }
  else {
    CmdPrompt = true;
  }
}

function craftingF() {
  if (mouse.click && getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5) && getBlock((mouse.x-screenMiddle.x)/blockSize+camera.x+0.5, (mouse.y-screenMiddle.y)/blockSize+camera.y+0.5)[0].id == 6) {
    crafting = true;
  }
  
  if (crafting) {
    c.rect(width/2-300, 100, 600, height-100-100, "lightgray");
    c.rect(width/2+300-30-10+5, 110+5, 30, 30, "darkred");
    c.rect(width/2+300-30-10, 110, 30, 30, "red");
    
    c.rect(width/2-295+5, 105+5, 250, 40, "darkblue");
    c.rect(width/2-295, 105, 250, 40, "blue");
    
    c.rect(width/2-295+5+260, 105+5, 250, 40, "darkblue");
    c.rect(width/2-295+260, 105, 250, 40, "blue");
    
    c.ctx.textAlign = "center";
    c.text(width/2-295+250/2, 135, 30, "Walls", "darkblue");
    c.text(width/2-295+260+250/2, 135, 30, "Others", "darkblue");
    c.ctx.textAlign = "left";
    
    if (mouse.x > width/2-295 && mouse.x < width/2-295+250 && mouse.y > 105 && mouse.y < 105+40 && mouse.click) {
      craftMode = 1;
    }
    
    if (mouse.x > width/2-295+260 && mouse.x < width/2-295+250+260 && mouse.y > 105 && mouse.y < 105+40 && mouse.click) {
      craftMode = 2;
    }
    
    if ((mouse.x > width/2+300-30-10 && mouse.x < width/2+300-30-10+30 && mouse.y > 110 && mouse.y < 140 && mouse.click) || keys[27]) {
      crafting = false;
    }
    
    if (keys[38]) {
      craftScroll -= 5;
    }
    
    if (keys[40] && craftScroll <= 0) {
      craftScroll += 5;
    }
    
    if (craftMode == 1) {
      for (var i = 0; i < 11; i++) {
        if (150+i*65+craftScroll > 150) {
          c.rect(width/2-300+5, 150+i*65+craftScroll, 590, 60, "gray");
        }
        for (var j = 0; j < craftingList[i].in.length; j++) {
          if (150+i*65+craftScroll > 150) {
            c.picture(width/2-300+10+j*55, 150+i*65+5+craftScroll, idInfo[craftingList[i].in[j]].image, 50, 50);
          }
        }
        if (150+i*65+craftScroll > 150) {
          c.picture(width/2+300-10-50, 150+i*65+5+craftScroll, idInfo[craftingList[i].out.block].image, 50, 50);
          c.rect(width/2+300-10-50, 150+i*65+5+craftScroll, 50, 50, craftingList[i].out.wall ? "rgba(0, 0, 0, 0.3)" : "rgba(0, 0, 0, 0)");
        }

        if (mouse.x > width/2-300+5 && mouse.x < width/2+300-5 && mouse.y > 150+i*65+craftScroll && mouse.y < 150+i*65+60+craftScroll && mouse.click) {
          if (craftKey) {
            var removedItems = [];
            for (var k = 0; k < craftingList[i].in.length; k++) {
              for (var j = 0; j < inv.length; j++) {
                if (inv[j].id == craftingList[i].in[k]) {
                  inv[j].amount--;
                  removedItems.push(inv[j].id);
                }
              }
            }
            if (removedItems.equals(craftingList[i].in)) {
              pickUp(craftingList[i].out.block, craftingList[i].out.wall);
            }
            else {
              for (var j = 0; j < removedItems.length; j++) {
                pickUp(removedItems[j], false);
              }
            }

            craftKey = false;
          }
        }
        else {
          if (!mouse.click)
            craftKey = true;
        }
      }
    }
    
    if (craftMode == 2) {
      for (var i = 11; i < craftingList.length; i++) {
        if (150+(i-11)*65+craftScroll > 150)
          c.rect(width/2-300+5, 150+(i-11)*65+craftScroll, 590, 60, "gray");
        for (var j = 0; j < craftingList[i].in.length; j++) {
          if (150+(i-11)*65+craftScroll > 150) {
            c.picture(width/2-300+10+j*55, 150+(i-11)*65+5+craftScroll, idInfo[craftingList[i].in[j]].image, 50, 50);
          }
        }
        if (150+(i-11)*65+craftScroll > 150) {
          c.picture(width/2+300-10-50, 150+(i-11)*65+5+craftScroll, idInfo[craftingList[i].out.block].image, 50, 50);
          c.rect(width/2+300-10-50, 150+(i-11)*65+5+craftScroll, 50, 50, craftingList[i].out.wall ? "rgba(0, 0, 0, 0.3)" : "rgba(0, 0, 0, 0)");
        }

        if (mouse.x > width/2-300+5 && mouse.x < width/2+300-5 && mouse.y > 150+(i-11)*65+craftScroll && mouse.y < 150+(i-11)*65+60+craftScroll && mouse.click) {
          if (craftKey) {
            var removedItems = [];
            for (var k = 0; k < craftingList[i].in.length; k++) {
              for (var j = 0; j < inv.length; j++) {
                if (inv[j].id == craftingList[i].in[k]) {
                  inv[j].amount--;
                  removedItems.push(inv[j].id);
                }
              }
            }
            if (removedItems.equals(craftingList[i].in)) {
              pickUp(craftingList[i].out.block, craftingList[i].out.wall);
            }
            else {
              for (var j = 0; j < removedItems.length; j++) {
                pickUp(removedItems[j], false);
              }
            }

            craftKey = false;
          }
        }
        else {
          if (!mouse.click)
            craftKey = true;
        }
      }
    }
  }
}

function mountain(x, y) {
  var a = 0;
  var r = c.random(10, 15);
  for (var j = 0; j < r; j++) {
    for (var i = 0; i < 30-a*c.random(1, 1.5); i++) {
      setBlock(x+i+a, y-j, j == r-1 ? 2 : 3, false);
      if (r-1 == j && c.random(0, 4) == 1) {
        tree(x+i+a, y-j);
      }
    }
    a += c.random(0, 3);
  }
}

function tree(x, y) {
  var r = c.random(4, 8);
  for (var i = 0; i < r; i++) {
    setBlock(x, y-i, 4, true);
  }
  if (r > 6) {
    setBlock(x-1, y-r/2, 10, true);
    setBlock(x-2, y-r/2, 10, true);
    setBlock(x+1, y-r/2, 10, true);
    setBlock(x+2, y-r/2, 10, true);
    
    setBlock(x-1, y-r+2, 10, true);
    setBlock(x+1, y-r+2, 10, true);
  }
}
             
// Warn if overriding existing method
if(Array.prototype.equals)
    console.warn("Overriding existing Array.prototype.equals. Possible causes: New API defines the method, there's a framework conflict or you've got double inclusions in your code.");
// attach the .equals method to Array's prototype to call it on any array
Array.prototype.equals = function (array) {
    // if the other array is a falsy value, return
    if (!array)
        return false;

    // compare lengths - can save a lot of time 
    if (this.length != array.length)
        return false;

    for (var i = 0, l=this.length; i < l; i++) {
        // Check if we have nested arrays
        if (this[i] instanceof Array && array[i] instanceof Array) {
            // recurse into the nested arrays
            if (!this[i].equals(array[i]))
                return false;       
        }           
        else if (this[i] != array[i]) { 
            // Warning - two different object instances will never be equal: {x:20} != {x:20}
            return false;   
        }           
    }       
    return true;
}
// Hide method from for-in loops
Object.defineProperty(Array.prototype, "equals", {enumerable: false});

function pickUp(id, wall) {
  for (var i = 0; i < inv.length; i++) {
    if (inv[i].id == id && inv[i].wall == wall) {
      inv[i].amount += 1;
      break;
    }
    else if (inv[i].id == 0) {
      inv[i].id = id;
      inv[i].amount++;
      inv[i].wall = wall;
      break;
    }
  }
}

function remove(id) {
  for (var i = 0; i < inv.length; i++) {
    if (inv[i].id == id) {
      inv[i].amount = 0;
      break;
    }
  }
}

function drawCoordSys() {
  c.line(0, coordOnScreen(0, 0).y, width, coordOnScreen(0, 0).y, 2, "red");
  c.line(coordOnScreen(0, 0).x, 0, coordOnScreen(0, 0).x, height, 2, "red");
}

function generateWorld(twidth, theight, blockSize, groundLevel) {
  for (var x = 0-twidth/2; x < 0+twidth/2; x++) {
    for (var y = 0-theight/2; y < 0+theight/2; y++) {
      var blockSettings = {x: x,
                           y: y,
                           wall: false};
      if (y < groundLevel)
        blockSettings.id = 1;
      else if (y == groundLevel)
        blockSettings.id = 2;
      else if (y > groundLevel && y < groundLevel+5)
        blockSettings.id = 3;
      else if (y >= groundLevel+5 && y < groundLevel+theight/2-10)
        blockSettings.id = 8;
      else if (y > groundLevel+theight/2-10 && y < groundLevel+theight/2-5)
        blockSettings.id = 7;
      else if (y > groundLevel+theight/2-6)
        blockSettings.id = 12;
      else
        blockSettings.id = 8;
      
      world.push(blockSettings);
    }
  }
  return true;
}

function getBlock(x, y) {
  x = Math.floor(x);
  y = Math.floor(y);
  
  if (x < -worldInfo.width / 2 || x > worldInfo.width / 2 || y < -worldInfo.height / 2 || y > worldInfo.height / 2) {
    return false;
  }
  
  const index = (x + worldInfo.width / 2) * worldInfo.height + y + worldInfo.height / 2;
  if (index < 0 || index >= world.length) {
    return false;
  }
  
  return [world[index], index];
}

// function getBlock(x, y) {
//   x = Math.floor(x);
//   y = Math.floor(y);
//   var i;
//   var ii = world.length;
//   for (i = 0; i < ii; i++) {
//     if (world[i].x == x && world[i].y == y) {
//       return [world[i], i];
//       break;
//     }
//   }
//   return false;
// }

function setBlock(x, y, id, wall) {
  world[getBlock(x, y)[1]].id = id;
  world[getBlock(x, y)[1]].wall = wall;
}

function coordOnScreen(x, y) {
  return {x: screenMiddle.x+x*blockSize-(blockSize/2)-camera.x*blockSize,
          y: screenMiddle.y+y*blockSize-(blockSize/2)-camera.y*blockSize};
}

function point(x, y, z) {;
  return {x: x*(map(z, 0, 100, 0, 100)/100)+centerX, y: y*(map(z, 0, 100, 0, 100)/100)+centerY};
}
  
function map( x,  in_min,  in_max,  out_min,  out_max){
  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}

function setCookie(cname, cvalue, exdays) {
    var d = new Date();
    d.setTime(d.getTime() + (exdays*24*60*60*1000));
    var expires = "expires="+ d.toUTCString();
    document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}

function getCookie(cname) {
    var name = cname + "=";
    var ca = document.cookie.split(';');
    for(var i = 0; i <ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0) == ' ') {
            c = c.substring(1);
        }
        if (c.indexOf(name) == 0) {
            return c.substring(name.length, c.length);
        }
    }
    return "";
}

function pollFunc(fn, timeout, interval) {
    var startTime = (new Date()).getTime();
    interval = interval || 1000,
    canPoll = true;

    (function p() {
        canPoll = ((new Date).getTime() - startTime ) <= timeout;
        if (!fn() && canPoll)  { // ensures the function exucutes
            setTimeout(p, interval);
        }
    })();
}

document.addEventListener("keydown", function(e) {
  keys[e.keyCode] = true;
});

document.addEventListener("keyup", function(e) {
  keys[e.keyCode] = false;
});

document.addEventListener("mousemove", function(e) {
  mouse.x = e.clientX;
  mouse.y = e.clientY;
});

document.addEventListener("mousedown", function(e) {
  if (e.button == 0)
    mouse.click = true;
  else if (e.button == 2)
    mouse.right = true;
});

document.addEventListener("mouseup", function(e) {
  mouse.click = false;
  mouse.right = false;
});

document.addEventListener("touchstart", function(e) {
  mouse.x = e.changedTouches[0].pageX;
  mouse.y = e.changedTouches[0].pageY;
  mouse.click = true;
});

document.addEventListener("touchmove", function(e) {
  mouse.x = e.changedTouches[0].pageX;
  mouse.y = e.changedTouches[0].pageY;
  e.preventDefault();
});

document.addEventListener("touchend", function(e) {
  mouse.click = false;
  mouse.right = false;
});

var lastScrollTop = 0;
// element should be replaced with the actual target element on which you have applied scroll, use window in case of no target element.
document.addEventListener("scroll", function(){
   var st = window.pageYOffset || document.documentElement.scrollTop;
   if (st > lastScrollTop){
       scroll = "down";
   } else {
      scroll = "up";
   }
   lastScrollTop = st;
}, false);

window.onerror = function(e) {
  if (e == "Uncaught TypeError: Cannot set property 'id' of undefined")
    alert("The game has crashed!\nCannot place block outside of world!");
  else if (e == "Uncaught TypeError: Cannot read property 'id' of undefined")
    alert("The game has crashed!\nCannot remove block/move outside of the world!");
  else
    alert("The game has crashed!\nUnknown error: " + e);
}