-- Summarize the last few unread emails into one paragraph via the LLM.
-- Pulls FROM+SUBJECT of up to 5 unread items, then asks the model for a
-- short paragraph in the user's language.

local lang = jarvis.context.language
local helper = jarvis.context.command_path .. "\\_outlook.ps1"
local cmd = string.format(
    'powershell -NoProfile -ExecutionPolicy Bypass -File "%s" -Action summarize_inbox -Limit 5',
    helper
)

local res = jarvis.system.exec(cmd)
local out = (res.stdout or ""):gsub("\r", "")

if not res.success or out == "" then
    jarvis.log("error", "outlook summarize_inbox exec failed: " .. tostring(res.stderr))
    return jarvis.cmd.error(lang == "ru"
        and "Outlook недоступен — запусти Outlook сначала."
        or  "Outlook is unavailable — start Outlook first.")
end

local lines = {}
for line in out:gmatch("[^\n]+") do table.insert(lines, line) end

local status = lines[1] or ""
if status:sub(1, 3) == "ERR" then
    jarvis.log("warn", "outlook summarize_inbox: " .. status)
    return jarvis.cmd.error(lang == "ru"
        and "Outlook недоступен — запусти Outlook сначала."
        or  "Outlook is unavailable — start Outlook first.")
end

local emails = {}
for i = 2, #lines do
    local from, subject = lines[i]:match("^FROM\t(.-)\tSUBJECT\t(.*)$")
    if from then
        table.insert(emails, { from = from, subject = subject or "" })
    end
end

if #emails == 0 then
    return jarvis.cmd.not_found(lang == "ru"
        and "Непрочитанных писем нет."
        or  "No unread emails.")
end

-- Build the prompt
local list_str = ""
for i, m in ipairs(emails) do
    list_str = list_str .. string.format("%d. From: %s | Subject: %s\n", i, m.from, m.subject)
end

local sys_prompt = lang == "ru"
    and "Ты помощник по почте. Кратко опиши, что лежит в инбоксе, ОДНИМ абзацем (2-4 предложения). Сгруппируй по темам/отправителям если возможно. Без преамбулы, без перечисления списком."
    or  "You are an email assistant. Briefly describe the inbox in ONE paragraph (2-4 sentences). Group by topic/sender when possible. No preamble, no bullet list."

local user_prompt = (lang == "ru" and "Непрочитанные письма:\n" or "Unread emails:\n") .. list_str

local reply = jarvis.llm(
    { { role = "system", content = sys_prompt },
      { role = "user",   content = user_prompt } },
    { max_tokens = 250, temperature = 0.4 }
)

if not reply or reply == "" then
    -- Fallback: simple flat enumeration when LLM is unavailable.
    local parts = {}
    for _, m in ipairs(emails) do
        table.insert(parts, string.format("%s — %s", m.from, m.subject))
    end
    local fallback = (lang == "ru"
        and string.format("Непрочитанных: %d. ", #emails)
        or  string.format("Unread: %d. ", #emails)) .. table.concat(parts, "; ") .. "."
    jarvis.system.notify(lang == "ru" and "Инбокс" or "Inbox", fallback)
    return jarvis.cmd.ok(fallback)
end

jarvis.system.notify(lang == "ru" and "Инбокс" or "Inbox", reply)
return jarvis.cmd.ok(reply)