dig50x50x3

local length = 10 -- x
local width = 10 -- y
local height = 3 -- z
local key1 = false
local key2 = false
local key3 = false
local chestName = "minecraft:ender_chest"
--"enderstorage:ender_storage"

local slotCount = 16

--Sets the dimensions for the Mining Area from command line arguments
-- Default size is listed above
function SetDimensions(...)
    local args = {...}
    if(#args == 3) then
        length = tonumber(args[1])
        width = tonumber(args[2])
        if(tonumber(args[3]) > 1) then
            height = tonumber(args[3])
        else
            print("minimum height is 2, for walkability reasons, setting height = 3")
        end
    else
        print("Malformed input given, please input using the format: 'Command' 'x' 'y' 'z' ")
        print("Defaulting to 10x10x3")
    end
end

SetDimensions(...)

--Checks fuel level and refules if fuel level is less than 10
--refuels by checking each slot for fuel
function CheckFuel()
    if(turtle.getFuelLevel() < 10) then
        for slot = 1, slotCount do
            print("Attempting to refuel on slot " .. slot)
            turtle.select(slot)
            if(turtle.refuel(1)) then
                return true
             end
        end
        return false
    end
    return true
end

--Checks each inv slot for enderchest
--returns ender chest slot number
function GetEnderIndex()
    print("Searching for chest")
    for slot = 1, slotCount do
        local item = turtle.getItemDetail(slot)
        if(item ~= nil) then
            if(item["name"] == chestName) then
                return slot
            end
        end
    end
    return nil
end

--Checks if all inventory slots are full
--if full returns true
function InvFullCheck()
    print("Checking if Inventory Full")
    local sum = 0
    for slot = 1, slotCount do
        if(turtle.getItemCount(slot) > 0) then
            sum = sum + 1
        end
    end
    if (sum == slotCount) then
        return true
    end
    return false
end

--Dumps all items but coal into an enderchest its carrying
function DumpItems()
    print("Attempting to dump items")
    turtle.select(GetEnderIndex())
    turtle.digUp()
    turtle.placeUp()
    print("Dumping Items")
    for slot = 1, slotCount do
        if(turtle.getItemDetail(slot) ~= nil) then
            local item = turtle.getItemDetail(slot)

            if(item["name"] ~= "minecraft:coal") then
                turtle.select(slot)
                turtle.dropUp()
            end
        end
    end
    turtle.digUp()
end

--For cases of gravel
function DetectAndDig()
    while(turtle.detect()) do
        turtle.dig()
    end
end

function Forward()
    DetectAndDig()
    turtle.forward()
end

function OneLayer()
    Forward()
end

function TwoLayers()
    Forward()
    turtle.digDown()
end

function ThreeLayers()
    TwoLayers()
    turtle.digUp()
end

function Up()
    while(turtle.detectUp) do
        turtle.digUp()
    end
    turtle.up()
end

function turnRight()
    turtle.turnRight()
    Forward()
    turtle.turnRight()
end

function turnLeft()
    turtle.turnLeft()
    Forward()
    turtle.turnLeft()
end

--Calculates the number of Up()s taken based on the turtles position always being between
--base and last layer of a 3 layer square, (i.e. 2, in 1-3) by checking if z index is less than layer index
--then calculates number of times the turtle needs to go Up by comparing
function CalculateUp(z)
    if(z < height - 2) then
        if((z + 3) == height) then
            Up()
            Up()
        elseif((z + 3) < height) then
            Up()
            Up()
            Up()
        end
    end
end

function SetKey(z)
    if(z == height) then
        key1 = true
        key2 = false
        key3 = false
    elseif(height - z == 1) then
        key2 = true

        key1 = false
        key3 = false
    else
        key3 = true

        key1 = false
        key2 = false
    end
end

function TurnAround()
    turtle.turnRight()
    turtle.turnRight()
end

--Checks to see if has ender chest and coal
function ReadyForJourney()
    return true
end


--------------Main----------------------
function Main()
if (not ReadyForJourney()) then
print("Your turtle isnt ready to journey out!")
print("Make sure your turtle has enough fuel and an enderchest!")
return
end

for z = 1, height, 3 do                             --

    SetKey(z)

    for y = 1, width do                         --starting length cuts one turn off

        for x = 1, length - 1 do                    --width cuts one length down off the next
            if(not CheckFuel()) then
                print("Your turtle is out of fuel!")
                print("Powering down....")
                return
            end

            if(InvFullCheck == true) then
                DumpItems()
            end

            if(key1)then
                OneLayer()
            elseif(key2)then
                TwoLayers()
            elseif(key3)then
                ThreeLayers()
            end
            --run some function with some local variable as a param, that gets changed every z changed
            --based on the number the function will run the right, function of mine one two or three layers
            --somehow WITHOUT doing checks (because if it does checks, its redundancy)

        end

        if(y ~= 3) then
            if(math.fmod(y, 2) == 0) then
                turnLeft()
            else
                turnRight()
            end
        else
            TurnAround()
        end

    end

    CalculateUp(z)

end
end

Main()