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

local char_up = 200
local char_down = 208
local char_right = 205
local char_left = 203

userChest = component.proxy('d6d5b397-6c3f-4291-9f3d-af2a67fcfd92')
redstoneBlock = component.proxy('5f2a5daf-d4d4-42e8-8125-a0a4778a87d7')
selectedItem = 1
currentlySelectedItem = nil
isInItemMenu = false
isInItemDisplayMenu = false


function unknownEvent()
  -- do nothing if the event wasn't relevant
end

-- table that holds all event handlers, and in case no match can be found returns the dummy function unknownEvent
local myEventHandlers = setmetatable({}, { __index = function() return unknownEvent end })

function myEventHandlers.key_up(adress, char, code, playerName)
    if (code == char_up) then
        if(isInItemMenu) then
            selectedItem = selectedItem - 1
            displayMenu()
        end
    end
    if (code == char_down) then
        if(isInItemMenu) then
            selectedItem = selectedItem + 1
            displayMenu()
        end
    end
    if(code == char_right) then
        if(isInItemMenu) then
            interactWithItem(currentlySelectedItem)
        end
    end
    if(code == char_left) then
        if(isInItemDisplayMenu) then
            displayMenu()
        end
    end
end

function handleEvent(eventID, ...)
  if (eventID) then -- can be nil if no event was pulled for some time
    myEventHandlers[eventID](...) -- call the appropriate event handler with all remaining arguments
  end
end

--- Setup our barrels.
allBarrels = {}
--- Loop through all our currently connected components, if the component is a barrel, proxy it and add it to our list.
for key,value in pairs(component.list()) do
    if(value == 'mcp_mobius_betterbarrel') then
        currentBarrel = component.proxy(key)
        allBarrels[currentBarrel.getAllStacks()[2].all().display_name] = component.proxy(key)
    end
end

function interactWithItem(item)
    isInItemMenu = false
    isInItemDisplayMenu = true
    for key,value in pairs(allBarrels) do
        if(key == item) then
            myItemName = key
            myItemQty = value.getAllStacks()[2].all().qty
        end
    end
    term.clear()
    print(myItemName, myItemQty)
    print('Amount to withdraw:')
    amount = io.read()
    if(tonumber(amount) < 65) then
        allBarrels[myItemName].pushItemIntoSlot(2,2,amount,1)
    end
    displayMenu()
end

function wait(seconds)
    local start = os.time()
    repeat until os.time() > start + seconds
end

function displayMenu()
    isInItemMenu = true
    isInItemDisplayMenu = false
    term.clear()
    i = 1
    for key,value in pairs(allBarrels) do
        if(selectedItem == i) then
            print(key,value.getAllStacks()[2].all().qty, 'X')
            currentlySelectedItem = key
        else
            print(key,value.getAllStacks()[2].all().qty)
        end
        i = i+1
    end
end

displayMenu()
while true do
    handleEvent(event.pull())
end