branchmine

-- Dig a S shaped mine to the left or right based on input
-- Checks for whether all slots are full, dumps everything in ender chest in slot 1.
-- Places torches reasonably when they are placed in slot 16.

function turnAround()
    for i=1,2 do
       turtle.turnLeft()
    end
end

function smartForward()
    --Dig a 2 high, 1 wide tunnel; gravel and sand friendly.
    while not turtle.forward() do
        turtle.dig()
    end
    while turtle.detectUp() do
        turtle.digUp()
        sleep(0.5)
    end
end

function snakeRight()
    -- Make a right turn in the snake.
    turtle.turnRight()
    for i=1,3 do
        smartForward()
    end
    torchPlace()
    turtle.turnRight()
end

function snakeLeft()
    -- Make a left turn in the snake.
    turtle.turnLeft()
    for i=1,3 do
        smartForward()
    end
    torchPlace()
    turtle.turnLeft()
end

function enderDump()
    --Dump contents of slots 2 through 15 in an ender chest.
    turnAround()
    turtle.select(1)
    turtle.place()
    for i=2,15 do
        turtle.select(i)
        turtle.drop()
    end
    turtle.select(1)
    turtle.dig()
    turnAround()
end

function torchPlace()
    while turtle.getItemCount(16) == 0 do
        print("Waiting for more torches!")
        sleep(2)
    end

    turtle.select(16)
    turtle.turnRight()
    sleep(0.25)
    turtle.placeUp()
    turtle.turnLeft()
    turtle.select(1)
end


function isFull()
    if turtle.getItemCount(15) < 64 then
        return false
     end
    return true
end

local args = {...}
if table.getn(args) < 1 then
    print("Usage: snakemine numBranch branchLength direction")
    print("numBranch is the number of loops to make.")
    print("branchLength is the length of the side branch")
    print("direction is left or right")
    print("Make sure torches are in slot 16!")
    print("Make sure Enderchest is in slot 1!")
    return
end
local numBranch = tonumber(args[1])
local branchLength = tonumber(args[2])
local direction = args[3]

if direction == "left" then
    print("left-handed!")
elseif direction == "right" then
    print("right-handed!")
else
    print("Direction must be left or right!")
    return
end

local sincetorch = 0

for a=1,numBranch do
    for b=1,branchLength do
        smartForward()
        sincetorch = sincetorch + 1
        if sincetorch == 10 then

            torchPlace()
            sincetorch = 0
        end

        if isFull() then
            enderDump()
        end
    end
    if direction == "left" then
        snakeRight()
    else
        snakeLeft()
    end

    for b=1,branchLength do
        smartForward()
        sincetorch = sincetorch + 1

        if sincetorch == 10 then
            torchPlace()
            sincetorch = 0
        end

        if isFull() then
            enderDump()
        end

    end
    if direction == "left" then
        snakeLeft()
    else
        snakeRight()
    end
end