-- IOC.lua — I/O Controller (AtlasOS Terminal v2.0)
-- out[1] = display_text    → Terminal
-- out[2] = display_clear   → Terminal
-- out[3] = display_color   → Terminal
-- out[4] = cmd_tx          → CMC.in[1] (IN|command)
-- in[1]  = user_input      ← Terminal
-- in[2]  = cmd_rx          ← CMC.out[1] (OUT|text / CLR / COL|R,G,B)

local txActive = false

inp = {}

function upd()
  if inp[1] ~= nil then
    out[4] = "IN|" .. tostring(inp[1])
    txActive = true
  elseif txActive then
    out[4] = ""
    txActive = false
  end

  if inp[2] ~= nil then
    local msg = tostring(inp[2])
    local pipe = msg:find("|")
    local op = pipe and msg:sub(1, pipe - 1) or msg
    local arg = pipe and msg:sub(pipe + 1) or nil
    if op == "OUT" and arg then
      out[1] = arg
    elseif op == "CLR" then
      out[2] = 1
    elseif op == "COL" and arg then
      out[3] = arg
    end
  end

  table.clear(inp)
end