local component = require('component')
local event = require('event')
local serialization = require('serialization')
local sides = require('sides')

local transposer = component.proxy(component.get("260", "transposer"))

IN_DIR = sides.south
OUT_DIR = sides.north

while true do

    local up = transposer.getAllStacks(IN_DIR)
    local stack = up()
    local slot = 1
    while stack do
        if stack.name then
            print(serialization.serialize(stack))

            -- find the first empty slot
            local output = transposer.getAllStacks(OUT_DIR)
            local output_stack = output()
            local dest_slot = 1
            while output_stack do
                -- find stack that matches item
                if not output_stack.name then
                    break
                end
                dest_slot = dest_slot + 1
                output_stack = output()
            end
            if dest_slot > transposer.getInventorySize(OUT_DIR) then
                print("Bottom inventory full")
                break
            end
            local result = transposer.transferItem(IN_DIR, OUT_DIR, stack.size, slot, dest_slot)
            print(result)
            -- todo handle if not everything was transfered
        end
        stack = up()
        slot = slot + 1
    end

    -- "sleep"
    if event.pull(2, "interrupted") then
        break
    end
end