Build

local m = require("blib")
local map = {x = 1, y = 0, z = 1, xf = 0, yf = 1}
local Length
local Width
local Height
local data


function MapTurnRight()
    turtle.turnRight()
    if map.xf == 1 then
        map.xf = 0
        map.yf = -1
    elseif map.xf == -1 then
        map.xf = 0
        map.yf = 1
    elseif map.yf == 1 then
        map.yf = 0
        map.xf = 1
    elseif map.yf == -1 then
        map.yf = 0
        map.xf = -1
    end
end

function MapTurnLeft()
    turtle.turnLeft()
    if map.xf == 1 then
        map.xf = 0
        map.yf = 1
    elseif map.xf == -1 then
        map.xf = 0
        map.yf = -1
    elseif map.yf == 1 then
        map.yf = 0
        map.xf = -1
    elseif map.yf == -1 then
        map.yf = 0
        map.xf = 1
    end
end

function MapForward()
    turtle.forward()
    if map.xf == 1 then
        map.x = map.x + 1
    elseif map.xf == -1 then
        map.x = map.x - 1
    elseif map.yf == 1 then
        map.y = map.y + 1
    elseif map.yf == -1 then
        map.y = map.y - 1
    end
end

function MapBackward()
    turtle.back()
    if map.xf == 1 then
        map.x = map.x - 1
    elseif map.xf == -1 then
        map.x = map.x + 1
    elseif map.yf == 1 then
        map.y = map.y - 1
    elseif map.yf == -1 then
        map.y = map.y + 1
    end
end

function MapUp()
    turtle.up()
    map.z = map.z + 1
end


-- Example ANY File
-- {
    -- Dimensions
    -- "X" : 2
    -- "Y" : 2
    -- "Z" : 2
    -- List of blocks needed
    -- "list" : {"name" : 1, "cobblestone" : 5, "name again" : 7} etc. for k, v in pairs(list) or whatever
    -- "1,1,1" : "minecraft:cobblestone"
    -- "2,1,1" : "Something else blockname idk"
-- }


function PlaceBlock()
    local fx = map.x
    local fy = map.y
    local fz = map.z

    if(map.xf ~= 0) then
        fx = fx + map.xf
    else
        fy = fy + map.yf
    end
    local key = tostring(fx) .. "," .. tostring(fy) .. "," .. tostring(fz)
    local blockName = data[key]
    if blockName ~= nil then
        if m.SelectItem(blockName) then
            turtle.place()
        end
    else
        return
    end

end

function PlaceBlockDown()
    local fx = map.x
    local fy = map.y
    local fz = map.z - 1
    local key = tostring(fx) .. "," .. tostring(fy) .. "," .. tostring(fz)
    local blockName = data[key]
    if blockName ~= nil then
        if m.SelectItem(blockName) then
            turtle.placeDown()
        end
    else
        return
    end

end




--- Building Process ---
function Start()

    MapTurnRight()
    MapTurnRight()           -- The turtle starts outside the square, as such, it enters at the start, and the Y index
    MapBackward()            -- is actually decremented by one, since mining on the x axis will manage one block off each
                             -- level change


    for z = 1, Height do

        for x = 1, Width do                         -- starting length cuts one turn off, but not one column off. see below

            for y = 1, Length - 1 do                -- width cuts one length down off the next

                -- check for fuel
                if(not m.CheckFuel(10)) then
                    return Shutdown("Out of Fuel!")
                end

                MapBackward()
                PlaceBlock()
            end

            if( Width - x ~= 0) then -- Technically on the last column, we want to continue forward so we can't do 'Width - 1', but don't turn into the next column
                if(lastTurn == "Right") then -- if we're on an even column, turn left
                    MapTurnLeft()
                    MapBackward()
                    PlaceBlock()
                    MapTurnLeft()
                    lastTurn = "Left"
                else -- odd columns (start is 1 btw) turn right!
                    MapTurnRight()
                    MapBackward()
                    PlaceBlock()
                    MapTurnRight()
                    lastTurn = "Right"
                end
            end

        end


        MapUp()
        PlaceBlockDown()
        MapTurnRight()
        MapTurnRight()



    end

    return 1
end

function Main()
    local response
    print("Welcome to the Minecraft file building program")
    print("please enter file you would like to build from")
    local FileName = read()
    local f = fs.open(FileName, "r") -- add nil safety
    local serializedData = f.readAll()
    data = textutils.unserialize(serializedData)
    Length = data.Y
    Width = data.X
    Height = data.Z

    Start()

    print("Finished!")
end
Main()