-- Made By Orwell
-- version 0.2 - 3 june 2012

local tArgs = { ... }
if #tArgs ~= 3 then
  print("Usage: build <gunzipped schematic file> <level> <facing>")
  return
end

local filename = tArgs[1]
local heightc = tArgs[2]
local sside = tArgs[3]

if not fs.exists(filename) then
  print("File does not exist.")
  return
end

local length = 0
local height = 0
local width = 0
local blocks = {}
local 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"

stairSide = {}
stairSide[0] = "South"
stairSide[1] = "West"
stairSide[2] = "North"
stairSide[3] = "East"

function getBlockName(id, blockData)
  blockData = blockData or nil
  if(block_id[id] == nil) then
    return "UNKNOWN"
  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()

up()
n = 1
turtle.select(n)

for x=heightc,heightc 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 blockID == 109 or blockID == 53 or blockID == 67 or blockID == 108 or blockID == 114 then
        print(blockData)
        slot_lst = slots[blockID][2]
      end
      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...")
            read()
          end
          if blockID == 109 or blockID == 53 or blockID == 67 or blockID == 108 or blockID == 114 then
            if blockData == 2 then
              place()
            elseif blockData == 3 then
              turtle.turnRight()
              turtle.turnRight()
              place()
              turtle.turnLeft()
              turtle.turnLeft()
            elseif blockData == 1 then
              turtle.turnRight()
              place()
              turtle.turnLeft()
            else
              turtle.turnLeft()
              place()
              turtle.turnRight()
            end
          else
            place()
          end
        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