Efficient Smart Turtle with Comeback!

----------------------
-- Efficient Quarry --
--  Made By Vilsol  --
--     1/20/2012    --
----------------------

term.clear()
term.setCursorPos(1, 1)

tArgs = { ... }
depth = 0
left = false
bonux = 0
bonuz = 0

if(tArgs[1] == "update")then
    shell.run("rm", "ebQuarry")
    shell.run("pastebin", "get", "LpBaQVER", "ebQuarry")
    print "Update successfull!"
    error()
end

function safeUp()
    checkFuel()
    if(not turtle.up())then
        sleep(1)
        if(turtle.attackUp())then
            for attack = 1, 50 do
                turtle.attackUp()
                if(turtle.up())then
                    up = 1
                    break
                end
                sleep(1)
            end
            if up then
                up = 0
                return true
            else
                error("Unknown problem!")
            end
        else
            if(turtle.digUp())then
                sleep(1)
                for graveler = 1, 8 do
                    if(not turtle.digUp())then
                        break
                    end
                    sleep(1)
                end
                if(turtle.up())then
                    return true
                else
                    error("Unknown problem!")
                end
            else
                error("Unknown problem!")
            end
        end
    else
        return true
    end
end

function safeDown()
    checkFuel()
    if(not turtle.down())then
        sleep(1)
        if(turtle.attackDown())then
            for attack = 1, 50 do
                turtle.attackDown()
                if(turtle.down())then
                    down = 1
                    break
                end
                sleep(1)
            end
            if down then
                down = 0
                return true
            else
                error("Unknown problem!")
            end
        else
            if(turtle.digDown())then
                sleep(1)
                for graveler = 1, 8 do
                    if(not turtle.digDown())then
                        break
                    end
                    sleep(1)
                end
                if(turtle.down())then
                    return true
                else
                    error("Unknown problem!")
                end
            else
                error("Unknown problem!")
            end
        end
    else
        return true
    end
end

function bringHome(widthz, heightx)
    if(widthz == nil)then widthz = 0 end
    if(heightx == nil)then heightx = 0 end
    if left then
        turtle.turnRight()
        if(widthz > 1)then
            for back = 1, widthz-1 do
                safeForward(12345, 12345)
            end
        end
        turtle.turnLeft()
        if(x-heightx > -3)then
            for back = 1, x-heightx+1 do
                safeForward(12345, 12345)
            end
        end
    else
        turtle.turnLeft()
        if(widthz > 1)then
            for back = 1, widthz-1 do
                safeForward(12345, 12345)
            end
        end
        turtle.turnLeft()
        if(heightx > 1)then
            for back = 1, heightx-1 do
                safeForward(12345, 12345)
            end
        end
    end
    if(adddown)then
        for backup = 1, depth+adddown do
            safeUp()
        end
    else
        for backup = 1, depth do
            safeUp()
        end
    end

    for slots = 1, 12 do
        turtle.select(slots)
        turtle.drop()
    end
    turtle.select(1)
    if(adddown)then
        for backdown = 1, depth+adddown do
            safeDown()
        end
    else
        for backdown = 1, depth do
            safeDown()
        end
    end

    if left then
        turtle.turnLeft()
        turtle.turnLeft()
        if(x-heightx+1 > -3)then
            for back = 1, x-heightx+1 do
            turtle.forward()
            end
        end
        turtle.turnRight()
        if(widthz > 1)then
            for back = 1, widthz-1 do
                turtle.forward()
            end
        end
        turtle.turnRight()
    else
        turtle.turnLeft()
        turtle.turnLeft()
        if(heightx > 1)then
            for back = 1, heightx-1 do
                turtle.forward()
            end
        end
        turtle.turnRight()
        if(widthz > 1)then
            for back = 1, widthz-1 do
                turtle.forward()
            end
        end
        turtle.turnLeft()
    end
end

function isFull(widthz, heightx)
    slot = turtle.getItemCount(12)
    if(slot >= 1)then
        bringHome(widthz, heightx)
    end
end

function checkSlots()
    dirt = turtle.getItemCount(14)
    stone = turtle.getItemCount(15)
    fuel = turtle.getItemCount(16)
    if(dirt == 1 and stone == 1 and fuel >= 1)then
        return true
    else
        return false
    end
end

function checkFuel()
    if(turtle.getFuelLevel() < 100)then
        turtle.select(16)
        if (turtle.refuel())then
            print "Refueled successfully"
            return true
        else
            error("Out of fuel!")
        end
        turtle.select(1)
    else
        return true
    end
end

function safeDig(widthz, heightx)
    isFull(widthz, heightx)
    if(not turtle.dig())then
        if(not turtle.detect())then
            return true
        else
            if(turtle.attack())then
                for attack = 1, 50 do
                    turtle.attack()
                    if(turtle.dig())then
                        dig = 1
                        break
                    end
                    sleep(0.1)
                end
                if dig then
                    dig = 0
                    return true
                else
                    error("Unknown problem!")
                end
            else
                error("Unknown problem!")
            end
        end
    else
        return true
    end
end

function safeForward(widthz, heightx)
    checkFuel()
    if(widthz ~= 12345 and heightx ~= 12345)then
        isFull(widthz, heightx)
    end
    if(not turtle.forward())then
        sleep(1)
        if(turtle.attack())then
            for attack = 1, 50 do
                turtle.attack()
                if(turtle.forward())then
                    forward = 1
                    break
                end
                sleep(1)
            end
            if forward then
                forward = 0
                return true
            else
                error("Unknown problem!")
            end
        else
            if(turtle.dig())then
                sleep(1)
                for graveler = 1, 8 do
                    if(not turtle.dig())then
                        break
                    end
                    sleep(1)
                end
                if(turtle.forward())then
                    return true
                else
                    error("Unknown problem!")
                end
            else
                if(not turtle.forward())
                    error("Unknown problem!")
                end
            end
        end
    else
        return true
    end
end

function compareOre()
    digup = 0
    digdown = 0
    turtle.select(14)
    if not turtle.compareUp() then
        digup = 1
    end
    if not turtle.compareDown() then
        digdown = 1
    end
    turtle.select(15)
    if not turtle.compareUp() then
        digup = digup + 1
    end
    if not turtle.compareDown() then
        digdown = digdown + 1
    end
    turtle.select(1)
    if(digup == 2)then turtle.digUp() end
    if(digdown == 2)then turtle.digDown() end
end

function turn()
    if left then
        left = false
        turtle.turnLeft()
        safeDig(widthz, heightx)
        safeForward(12345, 12345)
        turtle.turnLeft()
    else
        left = true
        turtle.turnRight()
        safeDig(widthz, heightx)
        safeForward(12345, 12345)
        turtle.turnRight()
    end
end

function calcuturn()
    if left then
        left = false
    else
        left = true
    end
end

function checkLayer(x, z)
    undone = 0
    for widthz = 1, z do
        if(bonuz > widthz and bonuz > 0)then
            bonuz = bonuz+1
            undone = 1
            break
        end
        for heightx = 1, x do
            if(bonux > heightx and bonux > 0)then
                bonux = bonux+1
                break
            end
            compareOre()
            safeDig(widthz, heightx)
            safeForward(widthz, heightx)
        end
        compareOre()
        if tonumber(widthz) < tonumber(z) then
            turn()
        end
    end
    if undone then
        if left then
            turtle.turnRight()
            for back = 1, z-1 do
                safeForward(widthz, heightx)
            end
            turtle.turnRight()
        else
            turtle.turnLeft()
            for back = 1, z-1 do
                safeForward(widthz, heightx)
            end
            turtle.turnLeft()
            for back = 1, x do
                safeForward(widthz, heightx)
            end
            turtle.turnLeft()
            turtle.turnLeft()
        end
        left = false
    end
end

function backUp()
    if(adddown)then
        for up = 1, y+2+adddown do
            safeUp()
        end
    else
        for up = 1, y+2 do
            safeUp()
        end
    end
end

function digQuarry(x, z, y)
    while true do
        checkLayer(x, z)
        bonux = 0
        bonuz = 0
        for down = 1, 3 do
            depth = depth + 1
            turtle.digDown()
            turtle.down()
        end
        if(depth >= y)then
            backUp()
            print "Done!"
            break
        end
    end
end

if(#tArgs < 3)then
    print "Usage: ebQuarry x z y add +x +z"
    error()
else
    x = tonumber(tArgs[1]) - 1
    z = tonumber(tArgs[2])
    y = tonumber(tArgs[3])
    if(tonumber(x) and tonumber(z) and tonumber(y))then
        if(checkSlots())then
            if(checkFuel())then
                if(#tArgs >= 4)then
                    if(tonumber(tArgs[4]) > 0)then
                        adddown = tonumber(tArgs[4])
                        for addingdown = 1, adddown do
                            turtle.digDown()
                            turtle.down()
                        end
                    end
                end
                if(#tArgs >= 5)then
                    if(tonumber(tArgs[5])-1 > 0)then
                        bonux = tonumber(tArgs[5])
                        for bx = 1, bonux do
                            turtle.forward()
                        end
                    end
                end
                if(#tArgs >= 6)then
                    if(tonumber(tArgs[6]) > 0)then
                        turtle.turnRight()
                        bonuz = tonumber(tArgs[6])
                        for bz = 1, bonuz do
                            turtle.forward()
                            calcuturn()
                        end
                        if left == false then
                            turtle.turnLeft()
                        else
                            turtle.turnRight()
                        end
                    end
                end
                print ("Digging a " .. x+1 .. "x" .. z .. "x" .. y .. " quarry!")
                digQuarry(x, z, y)
            else
                error("Something went very wrong!")
            end
        else
            print "Please fill in the slot as follows:"
            print "Slot 14: Dirt"
            print "Slot 15: Stone"
            print "Slot 16: Fuel"
            error()
        end
    else
        print "Please use only numbers!"
        error()
    end
end