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local RShift = 0x3c
local RAlt = 0x3d
local RCtrl = 0x3e

local pending
local modKeyRemap = {}

----------

local function pressFn(mods, key)
    return function() hs.eventtap.keyStroke(mods, key, 1000) end
end

local function remap(mods, key, pressFn, keyCode)
    if key ~= nil then
	    hs.hotkey.bind(mods, key, pressFn, nil, pressFn)
    else
        table.insert(modKeyRemap, {
            mods = mods,
            pressFn = pressFn,
            keyCode = keyCode
        })
    end
end

eventtap = hs.eventtap.new({
    hs.eventtap.event.types.flagsChanged,
    hs.eventtap.event.types.keyUp,
    hs.eventtap.event.types.keyDown
    }, function(e)
    if e:getType() == hs.eventtap.event.types.flagsChanged then
        local keyCode = e:getKeyCode()
        local flags = e:getFlags()

        for _, map in pairs(modKeyRemap) do
            local keyUpMods = {table.unpack(map.mods)}
            table.remove(keyUpMods, 1)
            if flags:containExactly(keyUpMods) and pending == map.mods then
                map.pressFn()
                pending = nil
            elseif flags:containExactly(map.mods) and keyCode == map.keyCode then
                pending = map.mods
            end
        end
    else
        pending = nil
    end
end)
eventtap:start()

----------

remap({'cmd', 'shift', 'alt'}, nil, pressFn({'ctrl'}, 'up'), RAlt) -- Action Center
remap({'cmd', 'ctrl'}, nil, pressFn({}, 'f11'), RCtrl) -- Connect
remap({'cmd', 'shift'}, nil, pressFn({'cmd'}, 'space'), RShift) -- Spotlight
-- remap({'cmd'}, 'd', pressFn({}, 'f11'))