AreaBuilder

areaX, areaY = ...

local move = require("move1")

if not areaX then
    areaX = 19
end
if not areaY then
    areaY = 19
end

local turtlePos = {0, 0, 0}
local turtleLastPos = {turtlePos[1], turtlePos[2], turtlePos[3]}

local turtleVec = {1, 0}
local turtleLastVec = {turtleVec[1], turtleVec[2]}

local workMode = 1

local function forward()
    move.Forward()
    turtlePos[1] = turtlePos[1] + turtleVec[1]
    turtlePos[2] = turtlePos[2] + turtleVec[2]
end
local function upward()
    move.Up()
    turtlePos[3] = turtlePos[3] + 1
end
local function downward()
    move.Down()
    turtlePos[3] = turtlePos[3] - 1
end
local function turnLeft()
    turtle.turnLeft()
    local buffer = turtleVec[1]
    turtleVec[1] = turtleVec[2]
    turtleVec[2] = -buffer
end
local function turnRight()
    turtle.turnRight()
    local buffer = turtleVec[1]
    turtleVec[1] = -turtleVec[2]
    turtleVec[2] = buffer
end

local function varInArr(var, arr)
    for i = 1, #arr, 1 do
        if var == arr[i] then
            return true
        end
    end
    return false
end

local function selectItemFromList(itemList)
    local itemA = turtle.getItemDetail()
    if itemA then
        if varInArr(itemA.name, itemList) then
            return true
        end
    end

    for i=1, 16, 1 do
        if turtle.getItemCount(i) > 0 then
            turtle.select(i)
            local itemB = turtle.getItemDetail()
            if itemB then
                if varInArr(itemB.name, itemList) then
                    return true
                end
            end
        end
    end
    return false
end

local function goToStart()
    if workMode == 1 then
        turtleLastPos = {turtlePos[1], turtlePos[2], turtlePos[3]}
        turtleLastVec = {turtleVec[1], turtleVec[2]}
        workMode = 2
    end

    while turtleVec[1] > -1 do
        turnRight()
    end
    if (turtlePos[1] + turtlePos[2] + math.abs(turtlePos[3])) > 0 then
        while turtlePos[1] > 0 do
            forward()
        end
        turnRight()
        while turtlePos[2] > 0 do
            forward()
        end
        turnLeft()
        while turtlePos[3] > 0 do
            downward()
        end
        while turtlePos[3] < 0 do
            upward()
        end
    end
    turnLeft()
    turnLeft()
end

local materialList = { "minecraft:cobblestone"}

turtle.placeDown()
while turtlePos[2] < areaY do
    if (turtlePos[2] % 2) == 0 then
        while turtlePos[1] < areaX - 1 do
            forward()
            selectItemFromList(materialList)
            turtle.placeDown()
        end
        if not (turtlePos[2] == areaY - 1) then
            turnRight()
            forward()
            selectItemFromList(materialList)
            turtle.placeDown()
            turnRight()
        else
            break
        end
    else
        while turtlePos[1] > 0 do
            forward()
            selectItemFromList(materialList)
            turtle.placeDown()
        end
        if not (turtlePos[2] == areaY - 1) then
            turnLeft()
            forward()
            selectItemFromList(materialList)
            turtle.placeDown()
            turnLeft()
        else
            break
        end
    end
end

goToStart()