-- Summarise the last N turns of LLM conversation in 1-2 sentences.
--
-- Reads the persistent history via `jarvis.llm_history()`, builds a short
-- recap prompt, asks the LLM. If there's no history yet or the LLM is
-- unreachable, falls back to a polite "ничего не вспомнить" reply.

local lang = jarvis.context.language

local turns = jarvis.llm_history() or {}
-- Take only the last 12 user/assistant turns to keep prompt small.
local recent = {}
local start = math.max(1, #turns - 11)
for i = start, #turns do
    if turns[i] then table.insert(recent, turns[i]) end
end

if #recent == 0 then
    return jarvis.cmd.not_found(lang == "ru"
        and "Мы пока ещё ни о чём не говорили, сэр."
        or  "We haven't talked about anything yet, sir.")
end

-- Render history as a compact "Пользователь: ... / Я: ..." dialogue.
local lines = {}
for _, m in ipairs(recent) do
    local who = m.role == "assistant" and (lang == "ru" and "Я" or "Me")
                                       or  (lang == "ru" and "Пользователь" or "User")
    table.insert(lines, who .. ": " .. (m.content or ""))
end
local transcript = table.concat(lines, "\n")

local token = jarvis.system.env("GROQ_TOKEN")
if not token or token == "" then
    -- Offline path: just speak the user's last message back briefly.
    return jarvis.cmd.ok(lang == "ru"
        and ("Без сети, сэр. Последний раз вы спросили: " .. (recent[#recent].content or ""):sub(1, 200))
        or  ("No network, sir. Last topic: " .. (recent[#recent].content or ""):sub(1, 200)))
end

local base  = jarvis.system.env("GROQ_BASE_URL")
if not base or base == "" then base = "https://api.groq.com/openai/v1" end
local model = jarvis.system.env("GROQ_MODEL")
if not model or model == "" then model = "llama-3.3-70b-versatile" end

local sys
if lang == "ru" then
    sys = "Ты — J.A.R.V.I.S. По ниже идущему диалогу с пользователем составь короткое "
        .. "напоминание (1-3 предложения), о чём шла речь. Говори от первого лица в "
        .. "стиле британского дворецкого. Не пересказывай дословно — сожми суть."
else
    sys = "You are J.A.R.V.I.S. From the dialogue below, write a brief recap "
        .. "(1-3 sentences) of what we talked about. Use first person, British "
        .. "butler tone. Don't quote verbatim — distil the essence."
end

local payload = {
    model = model,
    messages = {
        { role = "system", content = sys },
        { role = "user",   content = transcript },
    },
    max_tokens = 200,
    temperature = 0.4,
}

local res = jarvis.http.post_json(base .. "/chat/completions", payload,
                                  { Authorization = "Bearer " .. token })
if not res.ok then
    return jarvis.cmd.error(lang == "ru" and "LLM не отвечает." or "LLM didn't respond.")
end

local content = (res.body or ""):match('"content"%s*:%s*"(.-[^\\])"')
if not content then
    return jarvis.cmd.error(lang == "ru" and "Не смог разобрать ответ." or "Couldn't parse reply.")
end
content = content:gsub('\\n', ' '):gsub('\\"', '"'):gsub('\\\\', '\\')
content = content:gsub("%s+", " "):gsub("^%s+", ""):gsub("%s+$", "")

return jarvis.cmd.ok(content)