local buffer = ""
local completion_index = nil
local completion_fn = nil
local hide_input = false

KEY_BACKSPACE = 259
KEY_ENTER = 257

function do_event(etype, edata)
	if etype == "char" then
		buffer = buffer .. edata
		if hide_input then
			write("*")
		else
			write(edata)
		end
	elseif etype == "key" then
		if edata == KEY_BACKSPACE and #buffer > 0 then
			x, y = term.getCursorPos()
			x = x - 1
			term.setCursorPos(x, y)
			write(" ")
			term.setCursorPos(x, y)
			buffer = string.sub(buffer, 1, string.len(buffer) - 1)
		elseif edata == KEY_ENTER then
			local b = buffer
			buffer = ""
			return b
		end
	end
end

return {
	do_event = do_event,
	get_buffer = function() return buffer end,
	reset_buffer = function() buffer = "" end,
	set_completion = function(f) completion_fn = f end,
	hide_input = function(hide) hide_input = hide end,
}