local mcm_key = DIK_keys.DIK_Z -- your default key
local mcm_id = "exo_power" -- change this
local key_function = "key_func" -- this too if you renamed the function

function key_func()
    exo_powers.activate_powers()
end

local mcm_keybinds = ui_mcm and ui_mcm.key_hold
local modifier = 0
local second_key = 0

function on_mcm_load()
    local options = {
        id = mcm_id, sh = true,
        gr = {
            { id = mcm_id     , type = "slide"             , link = "ui_options_slider_player", text = "ui_mcm_menu_" .. mcm_id, size = {512, 50}, spacing = 20},
			{ id = "keybind"             , type = "key_bind"          , val = 2, def = mcm_key },
	        { id = "modifier"            , type = ui_mcm.kb_mod_radio , val = 2, def = 0, hint = "mcm_kb_mode" , 
                content = {
                    { 0, "mcm_kb_mode_press"},
                    { 1, "mcm_kb_mode_dtap"},
                    { 2, "mcm_kb_mode_hold"} 
                }
            },
            { id = "second_key"                   , type = ui_mcm.kb_mod_radio, val = 2, def = 0, hint = "mcm_kb_modifier" , 
                content = { 
                    {0,"mcm_kb_mod_none"} , 
                    {1,"mcm_kb_mod_shift"} , 
                    {2,"mcm_kb_mod_ctrl"},
                    {3,"mcm_kb_mod_alt"}
                }},
            { id = "desc_mcm"    	 	        , type = "desc"     , text = "ui_mcm_" .. mcm_id .. "_mcm", clr = {255, 175 ,0 ,0}, precondition = {function() return not mcm_keybinds end} }
        }
    }
    return options
end

local modes = {
    [0] = { ["call"] = {"on_key_press", "on_key_hold"}, ["function"] = function(key) ui_mcm.simple_press(mcm_id, key, key_function) end },
    [1] = { ["call"] = {"on_key_press", "on_key_hold"}, ["function"] = function(key) if ui_mcm.double_tap(mcm_id, key) then key_function() end end },
    [2] = { ["call"] = {"on_key_hold", "on_key_press"}, ["function"] = function(key) if ui_mcm.key_hold(mcm_id, key) then key_function() end end }
}

function on_key_press(key)
	if key ~= mcm_key then return end
    if not mcm_keybinds then 
        key_function() 
        return 
    end
    if ui_mcm.get_mod_key(second_key) then
        modes[modifier]["function"](key)
    end
end

function on_key_hold(key)
    if key ~= mcm_key then return end
    if ui_mcm.get_mod_key(second_key) then
        modes[modifier]["function"](key)
    end
end

function on_option_change(mcm)
	if mcm then
		mcm_key = ui_mcm.get(mcm_id .. "/keybind")
		modifier = ui_mcm.get(mcm_id .. "/modifier")
        second_key = ui_mcm.get(mcm_id .. "/second_key")
        RegisterScriptCallback(modes[modifier]["call"][1], this[modes[modifier]["call"][1]])
        UnregisterScriptCallback(modes[modifier]["call"][2], this[modes[modifier]["call"][2]])
	end
end

function on_game_start()
    RegisterScriptCallback("on_option_change", on_option_change)
    RegisterScriptCallback("on_key_press", on_key_press)
    key_function = this[key_function]
    on_option_change(mcm_keybinds)
end