Main

--Move Bot
function moveToLocation()
  newX = botCoords["x"] - newCoords["x"]
  newY = botCoords["y"] - newCoords["y"]
  newZ = botCoords["z"] - newCoords["z"]

  if newX > 0 then
    iWantToFace = 3
  else if newX < 0 then
    iWantToFace = 1
  end

  if newY > 0 then
    iWantToFace = 0
  else if newY < 0 then
    iWantToFace = 2
  end

  if newZ > 0 then
    if turtle.detectDown() then
      turtle.digDown()
    end
    turtle.down()
    botCoords["z"] = botCoords["z"] - 1
  else if newZ < 0 then
    if turtle.detectUp() then
      turtle.digUp()
    end
    turtle.up()
    botCoords["z"] = botCoords["z"] + 1
  end

  if facing == iWantToFace then
    if turtle.detect() then
      turtle.dig()
    end
    turtle.forward()
    if facing == 0 then
      botCoords["y"] = botCoords["y"] - 1
    elseif facing == 1 then
      botCoords["x"] = botCoords["x"] + 1
    elseif facing == 2 then
      botCoords["y"] = botCoords["y"] + 1
    elseif facing == 3 then
      botCoords["x"] = botCoords["x"] - 1
    end
  else
    turtle.turnRight()
    facing = facing + 1
    if facing > 3 then
      faceing = facing - 4
    end
  end
end

function canDig()
  hardParimeter = 10
  if botCoords["x"] + hardParimeter > nextCoords["x"] and botCoords["x"] - hardParimeter < nextCoords["x"] and botCoords["y"] +
    hardParimeter > nextCoords["y"] and botCoords["y"] - hardParimeter < nextCoords["y"] and botCoords["z"] +
    hardParimeter > nextCoords["z"] and botCoords["z"] - hardParimeter < nextCoords["z"] then

    return false
  else
    return true
  end
end

--Main Program
botCoords = {}
homeCoords = {}
chestCoords = {}
facing = 0
iWantToFace = 0
pathBack = {}

print("Gathering Coordinates")
file = fs.open("Locations", "r")
file.readLine()

x = tonumber(file.readLine())
botCoords["x"] = x
homeCoords["x"] = x

y = tonumber(file.readLine())
botCoords["y"] = y
homeCoords["y"] = y

z = tonumber(file.readLine())
botCoords["z"] = z
homeCoords["z"] = z

file.readLine()
chestCoords["x"] = tonumber(file.readLine())
chestCoords["y"] = tonumber(file.readLine())
chestCoords["z"] = tonumber(file.readLine())

goBackAt = 0
isGoingBack = true
needCoords = false


while true do
  if turtle.getFuelLevel() == 0 and turtle.getItemCount(16) > 0 then
    goBackAt = (turtle.getItemCount(16) * 80) / 2
    turtle.select(16)
    turtle.refuel(turtle.getItemCount(16))
    print("YUM")
    print(turtle.getFuelLevel())
  elseif turtle.getFuelLevel() == 0 then
    print("Sleepy Time")
    os.sleep(60)
  elseif turtle.getFuelLevel() <= goBackAt or isGoingBack then
    isGoingBack = true
    newCoords["x"] = chestCoords["x"]
    newCoords["y"] = chestCoords["y"]
    newCoords["z"] = chestCoords["z"]

    if turtle.detect() then
      data = turtle.inspect()
      if data.name == "Minecraft:Chest" then
        chest = peripheral.isPresent("front")
        for i = 1, 16 do
          turtle.select(i)
          turtle.drop()
        end
        for slot, item in pairs(chest.getAllStacks()) do
          if item.id == "Minecraft:Coal" then
            chest.pushItem("south", slot)
            break
          end
        end
        goBackAt = (turtle.getItemCount(16) * 80) / 2
        turtle.select(16)
        turtle.refuel(turtle.getItemCount(16))
        isGoingBack = false
        needCoords = true
      end
    end
  elseif needCoords then
    newCoords["x"] = math.floor(math.random() * goBackAt)
    newCoords["y"] = math.floor(math.random() * goBackAt)
    newCoords["z"] = math.floor(math.random() * goBackAt)
    needCoords = false
 end

  if not needCoords then
    moveToLocation()
  end
  end
end