rect

local depth, width, height = ...
depth = tonumber(depth)
width = tonumber(width)
height = tonumber(height)
height_direction_to_go = 'up'
width_direction_to_go = 'right'

function goHeight()
    if height > 1 then
        for h = 2, height do
            if height_direction_to_go == 'up' then
                print('up')
                turtle.digUp()
                turtle.up()
            elseif height_direction_to_go == 'down' then
                print('down')
                turtle.digDown()
                turtle.down()
            end
        end
        if height_direction_to_go == 'up' then
            height_direction_to_go = 'down'
        elseif height_direction_to_go == 'down' then
            height_direction_to_go = 'up'
        end
    end
end

function goWidth(moveUp)
    print('here 1')
    if width > 1 then
        print('here 2')
        for w = 2, width do
            print('here 3')
            if w == 2 and width_direction_to_go == 'right' then
                print('here 4')
                print('turn right')
                turtle.turnRight()
            elseif w == 2 and width_direction_to_go == 'left' then
                print('here 5')
                print('turn left')
                turtle.turnLeft()
            end
            print('width ' .. width_direction_to_go)
            turtle.dig()
            turtle.forward()
            if moveUp == true then
                goHeight()
            end
        end
        if width_direction_to_go == 'right' then
            print('here 6')
            print('turn left')
            width_direction_to_go = 'left'
            turtle.turnLeft()
        elseif width_direction_to_go == 'left' then
            print('here 7')
            print('turn right')
            width_direction_to_go = 'right'
            turtle.turnRight()
        end
    end
end

function forward()
    for d = 1, depth do
        print('forward')
        turtle.dig()
        turtle.forward()
        goHeight()
        goWidth(true)
    end
end

function goHome()
    if height_direction_to_go == 'down' then
        goHeight()
    end
    if width_direction_to_go == 'left' then
        goWidth(false)
    end
    turtle.turnLeft()
    turtle.turnLeft()
    for d = 1, depth do
        turtle.forward()
    end
end

function refuel()
    for i = 1, 16 do
        turtle.select(i)
        turtle.refuel()
    end
end

function drop()
    for i = 1, 16 do
        turtle.select(i)
        turtle.drop()
    end
end

function init()
    refuel()
    forward()
    goHome()
    drop()
end

init()