-- tracker.stop — close the currently open session.
local lang = jarvis.context.language or "ru"
local now = jarvis.context.time.timestamp or os.time()

local data = jarvis.state.get("data") or {}
local sessions = data.sessions or {}

local start_ts = data.current_session_start
if not start_ts then
    return jarvis.cmd.not_found(lang == "ru"
        and "Трекер не запущен, сэр."
        or  "Tracker isn't running, sir.")
end

local elapsed = now - start_ts
if elapsed < 1 then elapsed = 1 end

table.insert(sessions, { start = start_ts, ["end"] = now })

data.current_session_start = nil
data.sessions = sessions
jarvis.state.set("data", data)

local function format_dur(sec)
    sec = math.floor(sec)
    local h = math.floor(sec / 3600)
    local m = math.floor((sec % 3600) / 60)
    if lang == "ru" then
        if h > 0 and m > 0 then return h .. " ч " .. m .. " мин" end
        if h > 0 then return h .. " ч" end
        return m .. " мин"
    else
        if h > 0 and m > 0 then return h .. "h " .. m .. "m" end
        if h > 0 then return h .. "h" end
        return m .. "m"
    end
end

return jarvis.cmd.ok(lang == "ru"
    and ("Записал. Сессия: " .. format_dur(elapsed) .. ".")
    or  ("Done. Session: " .. format_dur(elapsed) .. "."))