local expansion = {}
local origArgs

function has_arg(name)
	-- The argument can exist and be empty or not exist at all
	return string.len(origArgs[name] or '') > 0
end

function arg(name)
	return origArgs[name]
end

function single_entry(box, argn)
	if has_arg(argn) then
		box:tag('div'):attr('style', 'min-width: 250px; display: inline-block;'):wikitext("'''" .. argn .. ":''' " .. arg(argn))
	end
end

function expansion.expansion(frame)

    if frame == mw.getCurrentFrame() then
        origArgs = frame:getParent().args
    else
        origArgs = frame
    end

    local entry = mw.html.create('div')

    entry
        :attr('style', 'background:#f9f9f9; margin: 10px 2px 10px 2px; padding: 5px; border: 1px solid #a7d7f9;')
        
    if not has_arg('type') then
    	return "* ERROR: '''WRONG <code>type</code> parameter!'''"	
	end
	
	if arg('type') == 'PCIe' then
		return 	expansion.pcie(entry)
	end
   
   return entry     
end

function expansion.pcie(box)
	return box	
end