-- Generate v4 UUID, copy to clipboard, speak short suffix.
math.randomseed(os.time() + (jarvis.context.time.minute or 0) * 1000)

local function hex(n)
    local s = {}
    for _ = 1, n do
        s[#s + 1] = string.format("%x", math.random(0, 15))
    end
    return table.concat(s)
end

-- v4 UUID: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where y is 8|9|a|b
local y_pool = { "8", "9", "a", "b" }
local uuid = string.format(
    "%s-%s-4%s-%s%s-%s",
    hex(8), hex(4), hex(3),
    y_pool[math.random(1, 4)], hex(3),
    hex(12)
)

jarvis.system.clipboard.set(uuid)
jarvis.system.notify("UUID", uuid)

-- Speak last 4 hex chars so user knows it landed but doesn't have to listen
-- to 32 characters.
local suffix = uuid:sub(-4)
return jarvis.cmd.ok("UUID в буфере, заканчивается на " .. suffix .. ".")