-- tracker.reset — wipe today's entries (and the open session).
local lang = jarvis.context.language or "ru"
local now = jarvis.context.time.timestamp or os.time()

local t = jarvis.context.time
local h = tonumber(t.hour) or 0
local mi = tonumber(t.minute) or 0
local s = tonumber(t.second) or 0
local today_start = now - (h * 3600 + mi * 60 + s)

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

local kept = {}
local dropped = 0
for _, sess in ipairs(sessions) do
    local sstart = tonumber(sess.start) or 0
    if sstart < today_start then
        table.insert(kept, sess)
    else
        dropped = dropped + 1
    end
end

local had_open = data.current_session_start ~= nil
data.sessions = kept
data.current_session_start = nil
jarvis.state.set("data", data)

if dropped == 0 and not had_open then
    return jarvis.cmd.ok(lang == "ru"
        and "Сегодня сбрасывать нечего, сэр."
        or  "Nothing to reset today, sir.")
end

local confirm
if lang == "ru" then
    confirm = "Подтверждаю: трекер за сегодня очищен"
    if dropped > 0 then
        local sw
        local n10 = dropped % 10; local n100 = dropped % 100
        if n100 >= 11 and n100 <= 14 then sw = "сессий"
        elseif n10 == 1 then sw = "сессия"
        elseif n10 >= 2 and n10 <= 4 then sw = "сессии"
        else sw = "сессий" end
        confirm = confirm .. ", удалено " .. dropped .. " " .. sw
    end
    if had_open then confirm = confirm .. ", активный отсчёт остановлен" end
    confirm = confirm .. "."
else
    confirm = "Confirmed: tracker for today cleared"
    if dropped > 0 then
        confirm = confirm .. ", " .. dropped .. " session" .. (dropped == 1 and "" or "s") .. " removed"
    end
    if had_open then confirm = confirm .. ", running session stopped" end
    confirm = confirm .. "."
end

return jarvis.cmd.ok(confirm)