enderchest miner

-- RENAME THIS PROGRAM TO STARTUP --
-- enderchest for fuel goes in slot 15
-- enderchest for item dropoff goes in slot 16

-- ARGS --

args = {...}
args[1] = tonumber(args[1])


-- VARIABLES --

file = "config"
usage = ("usage: programname [#] [left or right]")

-- STARTUP CODE --

if fs.exists(file) then
    f = fs.open(file, "r")
    left = tonumber(f.readLine())
    turn = f.readLine()
    len = tonumber(f.readLine())
    f.close()
    print("loaded config")
else
    if #args ~= 2 then
        return print(usage)
    elseif args[2] ~= "left" then
        if args[2] ~= "right" then
            return print(usage)
        end
    elseif args[2] ~= "right" then
        if args[2] ~= "left" then
            return print(usage)
        end
    end

    f = fs.open(file, "w")
    f.writeLine("1")
    f.writeLine(args[2])
    f.writeLine(tostring(args[1]))
    f.close()
    print("config made")

    print("rebooting computer to save changes")
    sleep(3)
    os.reboot()

end

-- FUNCTIONS --

function refuel(poo)
    digUp()
    if turtle.getFuelLevel() < poo then
        turtle.select(15)
        turtle.placeUp()
        turtle.suckUp()
        turtle.dropUp(turtle.getItemCount(15)-2)
        turtle.refuel()
        turtle.refuel()
        turtle.digUp()
    end
end

function unload()
    digUp()
    if turtle.getItemCount(9) > 0 then
        turtle.select(16)
        turtle.placeUp()
        for o = 1,9 do
            turtle.select(o)
            turtle.dropUp()
        end
        turtle.select(16)
        digUp()
        if turtle.getItemCount(10) > 0 then
            turtle.select(10)
            turtle.transferTo(1)
        end
    end
    turtle.select(1)
end

function dig()
  repeat
    turtle.dig()
    sleep(0.45)
  until not turtle.detect()
end

function digUp()
  repeat
    turtle.digUp()
    sleep(0.45)
  until not turtle.detectUp()
end

function goforward()
  while not turtle.forward() do
    turtle.attack()
  end
end

function toggle(var)
    if turn == "left" then
        turn = "right"
    elseif turn == "right" then
        turn = "left"
    end
end

function save(lol,haha)
    f = fs.open(file,"w")
    f.writeLine(tostring(lol+1))
    f.writeLine(haha)
    f.writeLine(len)
    f.close()
end

-- CODE --

if turtle.getItemCount(16) < 1 then
    turtle.select(16)
    turtle.digUp()
elseif turtle.getItemCount(15) < 1 then
    turtle.select(15)
    turtle.digUp()
end

while true do

    turtle.select(1)

    for i = left,len-1 do
        refuel(10)
        unload()
        turtle.digDown()
        digUp()
        dig()
        goforward()
        save(i,turn)
    end

    if turn == "left" then
        digUp()
        turtle.digDown()
        turtle.turnLeft()
        dig()
        goforward()
        turtle.turnLeft()
    elseif turn == "right" then
        digUp()
        turtle.digDown()
        turtle.turnRight()
        dig()
        goforward()
        turtle.turnRight()
    end

    toggle(turn)
    left = 1
    save(left,turn)
end