Turtle Quarry

local relX = 0 --relative position from home
local relY = 0 --relative position from home
local relZ = 1 --relative position from home
local curDir = 0 --Current Direction the turtle is facing relative to home chest
local YLevel = 1 --Y level the turtle is at, used for Post-resume
local sizeX = 1 --Size of Quarry
local sizeY = 1 --Size of Quarry
local sizeZ = 1 --Size of Quarry
local X = 1 --saved pos for resume, this is the for loop's i value
local Y = 1     --saved pos for resume, this is the for loop's i value
local Z = 1 --saved pos for resume, this is the for loop's i value
local facing = 2 --saved facing dir for resume
local atHome = true --is the turtle at home
local swap = false --is the turtle minging left to right or right to left
local hasStarted = false
local isGoingHome = false
local hasCompleted = false
local isResume = false
function Start() --initalize
        print("Define Quarry Size")
        write("X: ")
        sizeX = tonumber(read())
        write("Z: ")
        sizeZ = tonumber(read())
        write("Y: ")
        sizeY = tonumber(read())
        print("Starting...")
        CheckFuel()
        Turn("right", 2)
        Move("forward", 1)
        Move("down", 2)
        turtle.digDown()
        hasStarted = true
        atHome = false
        while hasCompleted == false do
                Dig(1,YLevel,1, sizeX, sizeY, sizeZ)
                if isGoingHome == true then
                        GoHome()
                end
                print("Looping")
        end
        --print("Done!")
end
function Dig(curX, curY, curZ, curSizeX, curSizeY, curSizeZ) --digging control
        for i=tonumber(curY), curSizeY, 1 do
                for i=tonumber(curX), curSizeX, 1 do
                        for i = tonumber(curZ), curSizeZ-1, 1 do
                                --print("moving in Z, ".. curDir.." i: "..i)
                                if CheckStatus() == false then
                                        isGoingHome = true
                                        Z = i
                                        print("Got Full, Going Home")
                                        break
                                end
                                Move("forward", 1)
                                turtle.digDown()
                                if not i == sizeZ then
                                        turtle.dig()
                                end
                                turtle.digUp()
                                if curDir == 0 then
                                        relZ = relZ -1
                                elseif curDir == 2 then
                                        relZ = relZ +1
                                end
                                --os.sleep(1)
                        end
                        if isGoingHome == true then
                                X = i
                                break
                        end
                        if i < sizeX then
                                if swap then
                                        --print("moving right")
                                        if curDir == 2 then
                                                Turn("right", 1)
                                                Move("forward", 1)
                                                Turn("right", 1)
                                        elseif curDir == 0 then
                                                Turn("left", 1)
                                                Move("forward", 1)
                                                Turn("left", 1)
                                        end
                                elseif not swap then
                                        --print("moving left")
                                        if curDir == 0 then
                                                Turn("right", 1)
                                                Move("forward", 1)
                                                Turn("right", 1)
                                        elseif curDir == 2 then
                                                Turn("left", 1)
                                                Move("forward", 1)
                                                Turn("left", 1)
                                        end
                                end
                                relX = relX +1
                                turtle.digDown()
                                turtle.dig()
                                turtle.digUp()
                        elseif i == sizeX then
                                if swap == true then
                                        Turn("right",2)
                                elseif swap == false then
                                        Turn("left",2)
                                end
                        end
                        --print("moving in X, ".. curDir.." i: "..i)
                        --os.sleep(1)
                end
                if isResume == ture then
                        isResume = false
                        break
                end
                if isGoingHome == true then
                        Y = i
                        break
                end
                CheckFuel()
                if i < sizeY then
                        Move("down", 3)
                        turtle.digDown()
                        swap = not swap
                        --print("swap stat: "..tostring(swap))
                        --print("moving in Y, ".. curDir.." i: "..i)
                        --os.sleep(1)
                end
                if i >= sizeY then
                        isGoingHome = true
                        hasStarted = false
                        hasCompleted = true
                        break
                end
                YLevel = i
        end
end
function CheckStatus() -- check if inventory is full
        if turtle.getItemCount(15) > 0 then
                return false
        else
                return true
        end
end
function Resume() -- sets the turtle up for a resume
        print("Resuming...")
        isResume = true
        atHome = false
        isGoingHome = false
        Turn("right", 2)
        Move("forward", math.abs(Z))
        if X < 0 then
                Turn("right", 1)
        end
        if X > 0 then
                Turn("left", 1)
        end
        Move("forward", math.abs(X))
        while not curDir == facing do
                Turn("right", 1)
        end
        Move("down", math.abs(Y))
        Dig(math.abs(X),math.abs(Y),math.abs(Z),sizeX-math.abs(X), sizeY-math.abs(Y), sizeZ-math.abs(Z))
end
function GoHome() --sends the turtle home
        print("Going Home...")
        --print(X .. ","..Y..","..Z .."Dir: "..curDir)
        facing = curDir
        Move("up", math.abs(relY))
        if curDir == 2 then
                Turn("left",2)
        end
        if not curX == nil then
                if curX < 0 then
                        Turn("right", 1)
                end
                if curX > 0 then
                        Turn("left", 1)
                end
        end
        Move("forward", math.abs(relX))
        if curDir == 1 then
                Turn("left",1)
        end
        if curDir == 2 then
                Turn("left",2)
        end
        if curDir == 3 then
                Turn("right",1)
        end
        Move("forward", math.abs(relZ))
        print("Got Home")
        atHome = true
        CheckFuel()
        Deposit()
end
function CheckFuel() -- checks the fuel level, refuels and gets more is the turtle is at home
        print("Refueling...")
        turtle.select(16)
        if atHome == true then
                if turtle.getItemCount(16) <= 1 then
                        GetFuel()
                end
        end
        turtle.select(16)
        while turtle.getFuelLevel() <= 500 do
                turtle.refuel(1)
        end
        turtle.select(1)
        print("Fuel Level: ".. turtle.getFuelLevel());
end
function GetFuel() -- gets more fuel
        print("Getting More Fuel...")
        Move("up",1)
        while turtle.getItemCount(16) < 64 do
                turtle.suck(1)
        end
        Move("down",1)
        --Deposit()
end
function Deposit() -- deposits items
        print("Depositing Items...");
        for i=1, 15, 1 do
                turtle.select(i)
                turtle.drop()
        end
        turtle.select(1)
        if hasStarted == true then
                Resume()
        else
                return
        end
end
function Turn(dir, count) --turn controller to keep track of direction
        if dir == "left" then
                for i=1, count, 1 do
                        --print("turing Left, cur Dir: "..curDir )
                        turtle.turnLeft()
                        curDir = curDir - 1
                        if curDir < 0 then
                                curDir = 3
                        end
                        --print("turned Left, new Dir: "..curDir )
                        --print("left, current Dir: "..curDir)
                end
        end
        if dir == "right" then
                for i=1, count, 1 do
                        --print("turning Right, cur Dir: "..curDir )
                        turtle.turnRight()
                        curDir = curDir + 1
                        if curDir > 3 then
                                curDir = 0
                        end
                        --print("turned right, new Dir: "..curDir )
                        --print("right, current Dir: "..curDir)
                end
        end
end
function Move(dir, dist) --move controller to insure propper movement and keep track of relative position
        if dir == "forward" then
                for i=1, dist, 1 do
                        while not turtle.forward() do
                                if turtle.detect() then
                                        turtle.dig()
                                else
                                        turtle.attack()
                                end
                                --turtle.forward()
                                --break
                        end
                        --if curDir == 0 then
                                --relZ = relZ - 1
                        --end
                        --if curDir == 2 then
                                --relZ = relZ + 1
                        --end
                        --if curDir == 1 then
                                --relZ = relX + 1
                        --end
                        --if curDir == 3 then
                                --relZ = relX - 1
                        --end
                end
        end
        if dir == "up" then
                for i=1, dist, 1 do
                        --print("Moving up...")
                        while turtle.up() == false do
                                if turtle.detectUp() then
                                        turtle.digUp()
                                else
                                        turtle.attackUp()
                                end
                                --turtle.up()
                                --break
                        end
                        relY = relY + 1
                end
        end
        if dir == "down" then
                for i=1, dist, 1 do
                        while not turtle.down() do
                                if turtle.detectDown() then
                                        turtle.digDown()
                                else
                                        turtle.attackDown()
                                end
                                --turtle.down()
                                --break
                        end
                        relY = relY - 1
                end
        end
end
Start() --Calls Start
print("Done!")