function saveVarsToFile()
        local h = fs.open("currentVars","w")
        local env = getfenv()
        for i,v in pairs(env) do
                h.write(i)
                h.write(': ')
                h.writeLine(v)
        end
        h.close()
end
 
if turtle.getFuelLevel() == 0 then
        print("No Fuel")
        error()
elseif turtle.getFuelLevel() < 300 then
        print("Low Fuel")
        error()
end
 
invList = {}
chestOrder = 1
enderchest1 = 15
enderchest2 = 16
 
tArgs = { ... }
if #tArgs ~= 1 then
  print("Usage: build <gunzipped schematic file>")
  return
end
 
filename = tArgs[1]
 
if not fs.exists(filename) then
  print("File does not exist.")
  return
end
 
length = 0
height = 0
width = 0
blocks = {}
data = {}
 
block_id = {}
 
block_id[0] = "Air"
block_id[1] = "Stone"
block_id[2] = "Grass"
block_id[3] = "Dirt"
block_id[4] = "Cobblestone"
block_id[5] = "Wooden Plank"
block_id[6] = "Sapling"
block_id[7] = "Bedrock"
block_id[8] = "Water"
block_id[9] = "Stationary water"
block_id[10] = "Lava"
block_id[11] = "Stationary lava"
block_id[12] = "Sand"
block_id[13] = "Gravel"
block_id[14] = "Gold Ore"
block_id[15] = "Iron (Ore)"
block_id[16] = "Coal Ore"
block_id[17] = "Log"
block_id[18] = "Leaves"
block_id[19] = "Sponge"
block_id[20] = "Glass"
block_id[21] = "Lapis Lazuli (Ore)"
block_id[22] = "Lapis Lazuli (Block)"
block_id[23] = "Dispenser"
block_id[24] = "Sandstone"
block_id[25] = "Note Block Tile entity"
block_id[26] = "Bed"
block_id[27] = "Powered Rail "
block_id[28] = "Detector Rail "
block_id[29] = "Sticky Piston"
block_id[30] = "Cobweb"
block_id[31] = "Tall Grass"
block_id[32] = "Dead Bush"
block_id[33] = "Piston"
block_id[34] = "Piston Extension"
block_id[35] = "Wool"
block_id[36] = "Block moved by Piston"
block_id[37] = "Dandelionandelion"
block_id[38] = "Rose"
block_id[39] = "Brown Mushroom"
block_id[40] = "Red Mushroom"
block_id[41] = "Block of Gold"
block_id[42] = "Block of Iron"
block_id[43] = "Double Slabs"
block_id[44] = "Slabs"
block_id[45] = "Brick Block"
block_id[46] = "TNT"
block_id[47] = "Bookshelf"
block_id[48] = "Moss Stone"
block_id[49] = "Obsidian"
block_id[50] = "Torch"
block_id[51] = "Fire"
block_id[52] = "Monster Spawner"
block_id[53] = "Wooden Stairs"
block_id[54] = "Chest"
block_id[55] = "Redstone (Wire)"
block_id[56] = "Diamond (Ore)"
block_id[57] = "Block of Diamond"
block_id[58] = "Crafting Table"
block_id[59] = "Seeds"
block_id[60] = "Farland"
block_id[61] = "Furnace"
block_id[62] = "Burning Furnace"
block_id[63] = "Sign Post"
block_id[64] = "Wooden Door"
block_id[65] = "Ladders"
block_id[66] = "Rails"
block_id[67] = "Cobblestone Stairs"
block_id[68] = "Wall Sign"
block_id[69] = "Lever"
block_id[70] = "Stone Pressure Plate"
block_id[71] = "Iron Door"
block_id[72] = "Wooden Pressure Plates"
block_id[73] = "Redstone Ore"
block_id[74] = "Glowing Redstone Ore"
block_id[75] = "Redstone Torch"
block_id[76] = "Redstone Torch"
block_id[77] = "Stone Button "
block_id[78] = "Snow"
block_id[79] = "Ice"
block_id[80] = "Snow Block"
block_id[81] = "Cactus"
block_id[82] = "Clay (Block)"
block_id[83] = "Sugar Cane"
block_id[84] = "Jukebox"
block_id[85] = "Fence"
block_id[86] = "Pumpkin"
block_id[87] = "Netherrack"
block_id[88] = "Soul Sand"
block_id[89] = "Glowstone"
block_id[90] = "Portal"
block_id[91] = "Jack-O-Lantern"
block_id[92] = "Cake Block"
block_id[93] = "Redstone Repeater"
block_id[94] = "Redstone Repeater"
block_id[95] = "Locked Chest"
block_id[96] = "Trapdoors"
block_id[97] = "Hidden Silverfish"
block_id[98] = "Stone Brick"
block_id[99] = "Huge brown and red mushroom"
block_id[100] = "Huge brown and red mushroom"
block_id[101] = "Iron Bars"
block_id[102] = "Glass Pane"
block_id[103] = "Melon"
block_id[104] = "Pumpkin Stem"
block_id[105] = "Melon Stem"
block_id[106] = "Vines"
block_id[107] = "Fence Gate"
block_id[108] = "Brick Stairs"
block_id[109] = "Stone Brick Stairs"
block_id[110] = "Mycelium"
block_id[111] = "Lily Pad"
block_id[112] = "Nether Brick"
block_id[113] = "Nether Brick Fence"
block_id[114] = "Nether Brick Stairs"
block_id[115] = "Nether Wart"
block_id[116] = "Enchantment Table"
block_id[117] = "Brewing Stand"
block_id[118] = "Cauldron"
block_id[119] = "End Portal"
block_id[120] = "End Portal Frame"
block_id[121] = "End Stone "
block_id[256] = "Iron Ingotron Shovel"
block_id[257] = "Iron Pickaxe"
block_id[258] = "Iron Axe"
block_id[259] = "Flint and Steel"
block_id[260] = "Red Apple"
block_id[261] = "Bow"
block_id[262] = "Arrow"
block_id[263] = "Coal"
 
woolColors = {}
woolColors[0] = "White"
woolColors[1] = "Orange"
woolColors[2] = "Magenta"
woolColors[3] = "Light Blue"
woolColors[4] = "Yellow"
woolColors[5] = "Lime"
woolColors[6] = "Pink"
woolColors[7] = "Gray"
woolColors[8] = "Light Gray"
woolColors[9] = "Cyan"
woolColors[10] = "Purple"
woolColors[11] = "Blue"
woolColors[12] = "Brown"
woolColors[13] = "Green"
woolColors[14] = "Red"
woolColors[15] = "Black"
 
function scanInv()
        local invList = {}
        for i = 1,16 do
                turtle.select(i)
                local item = turtle.getItemDetail()
                if item then
                        invList[i] = item.name
                end
        end
        return invList
end
 
function ParseInv()
        turtle.select(16)
        turtle.dropUp()
        while turtle.suck() do
                local item = turtle.getItemDetail()
                for i =1,16 do
                        if item.name == invList[i] then
                                turtle.transferTo(i)
                                break
                        end
                        if item.name == "minecraft:lava_bucket" or item.name == "minecraft:coal" then
                                turtle.refuel(64)
                        end
                end
                turtle.dropUp()
        end
end
 
function refill()
        EnderChests("set")
        ParseInv()
        EnderChests("gather")
end
 
function EnderChests(action)
        --action = 'set' or 'gather'
        if action == "set" then
                turtle.select(enderchest1)
                turtle.place()
                turtle.select(enderchest2)
                turtle.placeUp()
        elseif action == "gather" then
                if chestOrder == 1 then
                        turtle.select(enderchest1)
                        turtle.digUp()
                        turtle.select(enderchest2)
                        turtle.dig()
                        chestOrder = 2
                elseif chestOrder == 2 then
                        turtle.select(enderchest1)
                        turtle.dig()
                        turtle.select(enderchest2)
                        turtle.digUp()
                        chestOrder = 1
                end
        end
end
 
function getBlockName(id, blockData)
  blockData = blockData or nil
  if(block_id[id] == nil) then
    return "ID: "..tostring(id)..", Data: "..tostring(blockData)
  else
    if(blockData) then
      if(id == 35) then
        str = woolColors[blockData] .. " " .. block_id[id]
        return str
      end
    end
    return block_id[id]
  end
end
 
function getBlockId(x,y,z)
  return blocks[y + z*width + x*length*width + 1]
end
 
function getData(x,y,z)
  return data[y + z*width + x*length*width + 1]
end
 
function readbytes(h, n)
  for i=1,n do
    h.read()
  end
end
 
function readname(h)  
  n1 = h.read()
  n2 = h.read()
 
  if(n1 == nil or n2 == nil) then
    return ""
  end
 
  n = n1*256 + n2
 
  str = ""
  for i=1,n do
    c = h.read()
    if c == nil then
      return
    end  
    str = str .. string.char(c)
  end
  return str
end
 
function parse(a, h, containsName)
  containsName = containsName or true
  if a==0 then
    return
  end
  if containsName then
    name = readname(h)
  end
   
  if a==1 then
    readbytes(h,1)  
  elseif a==2 then
    i1 = h.read()
    i2 = h.read()
    i = i1*256 + i2
    if(name=="Height") then
      height = i
    elseif (name=="Length") then
      length = i
    elseif (name=="Width") then
      width = i
    end
  elseif a==3 then
    readbytes(h,4)
  elseif a==4 then
    readbytes(h,8)
  elseif a==5 then
    readbytes(h,4)
  elseif a==6 then
    readbytes(h,8)
  elseif a==7 then
    i1 = h.read()
    i2 = h.read()
    i3 = h.read()
    i4 = h.read()
    i = i1*256*256*256 + i2*256*256 + i3*256 + i4
    if name == "Blocks" then
      for i=1,i do
        table.insert(blocks, h.read())
      end
    elseif name == "Data" then
      for i=1,i do
        table.insert(data, h.read())
      end
    else
      readbytes(h,i)
    end
  elseif a==8 then
    i1 = h.read()
    i2 = h.read()
    i = i1*256 + i2
    readbytes(h,i)
  elseif a==9 then
        --readbytes(h,5)
        type = h.read()
        i1 = h.read()
    i2 = h.read()
    i3 = h.read()
    i4 = h.read()
    i = i1*256*256*256 + i2*256*256 + i3*256 + i4
    for j=1,i do
      parse(h.read(), h, false)
    end
  end
end
 
function forward()
  while not turtle.forward() do
    turtle.dig()
  end
end
 
function up()
  while not turtle.up() do
    turtle.digUp()
  end
end
 
function down()
  while not turtle.down() do
    turtle.digDown()
  end
end
 
function place()
  while not turtle.placeDown() do
    turtle.digDown()
  end
end
 
h = fs.open(filename, "rb")
 
a = 0
while (a ~= nil) do
  a = h.read()
  parse(a, h)
end
 
write("length: " .. length)
write("   width: " .. width)
write("   height: " .. height .. "\n")
 
uniqueblocks={}
for i,v in ipairs(blocks) do
  found = false
  for j,w in ipairs(uniqueblocks) do
    -- for now, data is only accounted for when the block is whool
    if (w.blockID==v and (w.data==data[i] or w.blockID ~= 35)) then
      found = true
      w.amount = w.amount + 1
      break
    end
  end
 
  if found==false then
    uniqueblocks[#uniqueblocks+1] = {}
    uniqueblocks[#uniqueblocks].blockID = v
    uniqueblocks[#uniqueblocks].data = data[i]
    uniqueblocks[#uniqueblocks].amount = 1
  end
end
 
print("number of block types: " .. #uniqueblocks)
for i,v in ipairs(uniqueblocks) do
  if (i%9)==0 then
    read()
  end
  print(" -" .. getBlockName(v.blockID, v.data) .. ": " .. v.amount)
end
 
read()
 
print("Give the numbers of all slots containing the specified block type:")
 
slots={}
for i,block in ipairs(uniqueblocks) do
  blockData = block.data
  print(" -in which slots is " .. getBlockName(block.blockID, blockData) .. "?")
  if not slots[block.blockID] then
    slots[block.blockID] = {}
  end
  slots[block.blockID][blockData] = {}
  write("   ")
  str = read()
  for i = 1, #str do
    local c = str:sub(i,i)
    n = tonumber(c)
    if(n) then
      if(n>0 and n<10) then
        table.insert(slots[block.blockID][blockData], n)
      end
    end
  end
end
 
print("Press key to start building...")
read()
invList = scanInv()
 
up()
n = 1
turtle.select(n)
 
for x=1,height do
  for y=1,width do
    for z=1,length do
      blockID = getBlockId(x-1,y-1,z-1)
      blockData = getData(x-1,y-1,z-1)
      forward()
      turtle.digDown()
      slot_lst = slots[blockID][blockData]
      if(slot_lst ~= nil) then
        if(#slot_lst > 0) then
          local found=false
          for i,v in ipairs(slot_lst) do
            if(turtle.getItemCount(v) > 0) then
              found=true
              turtle.select(v)
              break
            end
          end
          if not found then
                print("Not enough " .. getBlockName(blockID, blockData) .. ". Please refill...")
                local mem = turtle.getSelectedSlot()
                refill()
                turtle.select(mem)
          end
          place()
          if turtle.getFuelLevel() < 200 then
                refill()
          end
          --save()
        end
      end
    end
    turtle.turnLeft()
    forward()
    turtle.turnLeft()
    for i=1,length do
      forward()
    end
    turtle.turnRight()
    turtle.turnRight()
  end
  turtle.turnRight()
  for i=1,width do
    forward()
  end
  turtle.turnLeft()
  up()
end
 
for i=1,height+1 do
  down()
end