Maven/cmd/mavend/voice.go

// Package main is mavend's voice wiring + reactive handler.
//
// Two responsibilities for the audio path:
//
//  1. CONSTRUCTION: read cfg.Voice, build the stt/tts/transcribers (Stub
//     in-process by default, Remote via worker socket when configured),
//     the router (stage-0 grammar + HashEmbedder classifier seeded with
//     floor examples — production swaps in the ONNX multilingual model
//     later), the voice TCP listener, the sessions registry, the
//     voicesink, and wire the voicesink into the dispatcher's Voice slot.
//
//  2. HANDLER: a concrete voice.Handler that processes PushToTalk
//     requests: stt → router → action → replier → tts → reply. The
//     handler is what makes the audio round-trip "live". It wires to the
//     CoreAPI in-process (the daemon already has it as ipc.NewStoreAPI(st)
//     for module-IPC — the reactive path uses the same CoreAPI off the
//     same store; both are the "core = the only key-holder" path through
//     the daemon-embedded adapter).
//
// The "actions" handled today (per spec order; some deferred):
//
//   - IntentFact: WriteFact via CoreAPI. The router's Slots.Key/Value feed
//     the write; Source = "tap:voice" (the voice path is a tap, value=1.0
//     confidence — the user said it out loud, maven trusts the capture).
//   - IntentReminder: CreateReminder via CoreAPI. The router already
//     resolved relative→absolute at capture ("in 4h" → fire_ts); the
//     CoreAPI stores it as-is.
//   - IntentAct: the tool executor runs the matched fn against the store's
//     ENABLED allowlist (internal/tool). A verb not on it is scaffolded as a
//     'proposed' tool a human enables on the authed mavweb surface (never
//     voice). Destructive tools run only after a spoken confirm turn.
//   - IntentNote: chroma/vector-store deferred. The handler replies
//     "saved" without persisting — a stub on the way to chroma.
//   - IntentQuery: RAG-over-chroma deferred. The handler replies "I'll
//     look that up later" — same shape as the other deferred slots.
//   - Clarify: the router's stage-3 confidence gate fired; reply "didn't
//     catch that, can you rephrase?"
//
// The Replier (voice.StubReplier today) renders the reply TEXT across all
// these branches. The TTS synthesiser (tts.Stub today) renders that text
// to audio. The PushToTalkResp carries BOTH so the client can play (audio)
// AND log (text) for tests asserting the round-trip.
package main

import (
	"bufio"
	"context"
	"errors"
	"fmt"
	"log"
	"os"
	"path/filepath"
	"strings"
	"sync"
	"time"

	"github.com/kami/maven/internal/audio"
	"github.com/kami/maven/internal/config"
	"github.com/kami/maven/internal/delivery"
	"github.com/kami/maven/internal/delivery/voicesink"
	"github.com/kami/maven/internal/dialogue"
	"github.com/kami/maven/internal/ipc"
	"github.com/kami/maven/internal/llm"
	"github.com/kami/maven/internal/memory"
	"github.com/kami/maven/internal/pattern"
	"github.com/kami/maven/internal/phraser"
	"github.com/kami/maven/internal/router"
	"github.com/kami/maven/internal/store"
	"github.com/kami/maven/internal/stt"
	"github.com/kami/maven/internal/tool"
	"github.com/kami/maven/internal/tts"
	"github.com/kami/maven/internal/ttsnorm"
	"github.com/kami/maven/internal/voice"
	"github.com/kami/maven/internal/weather"
	"github.com/kami/maven/internal/worker"
)

// voiceWiring — everything the daemon needs to run the audio path. Held by
// cmd/mavend/main.go alongside the other wirings; closed on shutdown.
type voiceWiring struct {
	server    *voice.Server
	sessions  *voice.Sessions
	voiceSink delivery.Sink
	embedder  router.Embedder
	handler   *reactiveHandler // the reactive handler for IPC Chat
	// worker clients (set when configured as Remote): closed on shutdown so
	// mavsttd / mavttsd don't keep a stale conn into a restarting daemon.
	sttClient *worker.Client
	ttsClient *worker.Client
}

// close releases the listener + worker conns. Safe to call on nil (when
// voice is not wired — wireVoice returns nil,nil).
func (w *voiceWiring) close() {
	if w == nil {
		return
	}
	if w.embedder != nil {
		_ = w.embedder.Close()
	}
	if w.server != nil {
		_ = w.server.Close()
	}
	if w.sttClient != nil {
		_ = w.sttClient.Close()
	}
	if w.ttsClient != nil {
		_ = w.ttsClient.Close()
	}
}

// wireVoice builds the audio path from cfg + a CoreAPI + a router. Returns
// nil wiring + nil error when voice isn't enabled (the caller's voice sink
// stays nil; the dispatcher's ChannelVoice routing drops silently).
//
// When voice is enabled, MUST wire a voicesink into the dispatcher's Voice
// slot using w.sessions (the caller does that — see main.go).
func wireVoice(cfg *config.Config, coreAPI ipc.CoreAPI, phr phraser.Phraser, memStore memory.Store, dataStore *store.Store, eco *ecosystemWiring) (*voiceWiring, error) {
	if cfg.Voice == nil || !cfg.Voice.Enabled {
		return nil, nil
	}
	w := &voiceWiring{}

	// ----- stt (Stub in-process OR Remote via worker socket) -----
	var transcriber stt.Transcriber
	if cfg.Voice.Stt != nil && cfg.Voice.Stt.Socket != "" {
		c := worker.Dial(cfg.Voice.Stt.Socket)
		w.sttClient = c
		lang := cfg.Voice.Stt.Lang
		if lang == "" {
			lang = cfg.Voice.Lang
		}
		transcriber = stt.NewRemote(c, lang)
	} else {
		transcriber = stt.NewStub()
	}

	// ----- tts (Stub in-process OR Remote) -----
	var synthesizer tts.Synthesizer
	if cfg.Voice.Tts != nil && cfg.Voice.Tts.Socket != "" {
		c := worker.Dial(cfg.Voice.Tts.Socket)
		w.ttsClient = c
		lang := cfg.Voice.Tts.Lang
		if lang == "" {
			lang = cfg.Voice.Lang
		}
		synthesizer = tts.NewRemote(c, lang, cfg.Voice.Tts.Voice)
	} else {
		synthesizer = tts.NewStub()
	}

	// ----- router: embedder (ONNX when configured, floor HashEmbedder otherwise) -----
	var emb router.Embedder
	if cfg.Voice.Embedder != nil {
		onnx, err := router.NewONNXEmbedder(
			cfg.Voice.Embedder.ModelPath,
			cfg.Voice.Embedder.TokenizerPath,
			cfg.Voice.Embedder.LibPath,
		)
		if err != nil {
			w.close()
			return nil, fmt.Errorf("embedder: %w", err)
		}
		log.Printf("voice: onnx embedder loaded (%d dim)", onnx.Dim())
		emb = onnx
	} else {
		log.Printf("voice: embedder not configured, using HashEmbedder floor")
		emb = router.NewHashEmbedder(1024)
	}
	w.embedder = emb
	checkStoredEmbedder(dataStore, emb)

	// ----- tool executor (the enabled act allowlist, store-backed) -----
	// Config tools are the declarative bootstrap: seed them into the store as
	// enabled (editing mavend.json IS the human enable act). Ad-hoc tools are
	// enabled later through the authed mavweb surface. The executor + matcher
	// both read the store live, so a newly-enabled tool is runnable without a
	// daemon restart.
	seedTools(coreAPI, cfg.Voice.Tools)
	exec := tool.NewExecutor(coreAPI, time.Duration(cfg.Voice.ToolTimeout))
	matcher := tool.NewMatcher(coreAPI)

	// ----- weather provider (Open-Meteo when configured, Stub otherwise) -----
	var weatherProvider weather.Provider
	var weatherLocation string
	if cfg.Voice.Weather != nil && cfg.Voice.Weather.Provider == "open-meteo" {
		weatherProvider = weather.NewOpenMeteoProvider()
		weatherLocation = cfg.Voice.Weather.DefaultLocation
		log.Printf("voice: weather provider: open-meteo (default location: %s)", cfg.Voice.Weather.DefaultLocation)
	} else {
		weatherProvider = weather.NewStubProvider()
		log.Printf("voice: weather provider: stub (not configured)")
	}

	// The replier uses the same llama-server as the phraser.
	var llmClient *llm.Client
	if lp, ok := phr.(*phraser.LLMPhraser); ok {
		llmClient = llm.New(lp.BaseURL(), 60*time.Second)
	}
	// ----- router (the cascade; floor examples seed the classifier) -----
	// The act matcher's allowlist is exactly the enabled tool names — the
	// router only matches acts the executor can run (one source of truth).
	threshold := cfg.Voice.RouterThreshold
	if threshold <= 0 {
		threshold = config.DefaultRouterThreshold
	}
	// The resident model routes by default: 63.2% of held-out intents right
	// against the classifier's 50.0%, at about 1s a turn instead of 30ms (see
	// config.VoiceConfig.LLMRouter). The classifier always stays wired as the
	// fallback, so a model error never breaks a turn.
	rtr := buildRouter(emb, matcher, threshold, pickLLMRouter(cfg.Voice.UseLLMRouter(), llmClient))

	// ----- sessions registry (shared with voicesink) -----
	sessions := voice.NewSessions()
	w.sessions = sessions

	// ----- voice sink (proactive nudges: dispatcher → voicesink → tts → push to client) -----
	w.voiceSink = voicesink.New(synthesizer, sessions)

	// ----- memory (long-term vector storage) -----
	// Persistent (store-backed, survives restarts) when the daemon passes one;
	// falls back to the in-memory floor otherwise (tests / no-store paths).
	if memStore == nil {
		memStore = memory.NewInMemoryStore()
	}

	// ----- dialogue (multi-turn slot carry-over; 2-min follow-up window) -----
	// Store-backed when the daemon passes a store, so a restart mid-conversation
	// keeps the thread (Vikunja #363). Sessions past their TTL are dropped on
	// load, never revived. Clarify's parked question stays in memory only.
	var dialogueSessions *dialogue.SessionStore
	if dataStore != nil {
		dialogueSessions = dialogue.NewPersistentSessionStore(2*time.Minute, dataStore)
		if err := dialogueSessions.Load(context.Background(), time.Now()); err != nil {
			log.Printf("dialogue: load saved sessions: %v", err)
		}
	} else {
		dialogueSessions = dialogue.NewSessionStore(2 * time.Minute)
	}
	clarifyStore := dialogue.NewClarifyStore(clarifyTTL)
	timeParser := router.NewPythonDateParser()

	// ----- replier (LLM-backed when the engine is on, Stub floor otherwise) -----
	replier := voice.Replier(voice.NewStubReplier())
	if llmClient != nil {
		replier = newLLMReplier(llmClient, contextBlockFn(cfg, time.Now))
	}

	// ----- the handler (the reactive path; closes over stt / tts / router / coreAPI / memory) -----
	h := &reactiveHandler{
		stt:              transcriber,
		tts:              synthesizer,
		router:           rtr,
		embedder:         emb,
		api:              coreAPI,
		tools:            exec,
		matcher:          matcher,
		replier:          replier,
		phraser:          phr,
		now:              time.Now,
		weatherProvider:  weatherProvider,
		weatherLocation:  weatherLocation,
		memStore:         memStore,
		dataStore:        dataStore,
		dialogueSessions: dialogueSessions,
		clarifyStore:     clarifyStore,
		// 0 here (unset config) ⇒ the dialogue default.
		clarifyMaxAttempts: cfg.Voice.ClarifyMaxAttempts,
		extractor:          router.Extractor{Time: timeParser, Acts: matcher, Facts: router.DefaultFactParser{}},
		queryMinScore:      cfg.Voice.QueryMinScore,
		queryMinMargin:     cfg.Voice.QueryMinMargin,
		timeParser:         timeParser,
		ecosystem:          eco,
	}

	// ----- the server (TCP listener) -----
	srv := voice.NewServer(cfg.Voice.Bind, h, sessions)
	if err := srv.Listen(); err != nil {
		w.close()
		return nil, fmt.Errorf("voice listen: %w", err)
	}
	w.server = srv
	w.handler = h

	return w, nil
}

// reactiveHandler — voice.Handler implementation. One method: turn a
// PushToTalkReq into a reply (audio + text). The handler is concurrency-
// safe (the wired stt/tts/router/api all are); called from per-conn
// goroutines on the voice.Server.
type reactiveHandler struct {
	stt      stt.Transcriber
	tts      tts.Synthesizer
	router   *router.Router
	embedder router.Embedder // reused for note write/query (same model as the classifier)
	api      ipc.CoreAPI
	tools    *tool.Executor
	matcher  *tool.Matcher
	phraser  phraser.Phraser
	replier  voice.Replier
	now      func() time.Time

	weatherProvider weather.Provider
	weatherLocation string // default location for weather queries

	memStore  memory.Store
	dataStore *store.Store // direct store access for event extraction + pattern detection

	// queryMinScore — the note-recall confidence gate. Top cosine below this ⇒
	// "I don't know" instead of a guess. Tuned for the ONNX embedder; a knob, not
	// load-bearing math (same posture as the presence thresholds). Set by
	// wireVoice from VoiceConfig; default 0.55.
	queryMinScore float64
	// queryMinMargin — the second half of that gate: how far the top hit must
	// beat the runner-up. 0 ⇒ margin off.
	queryMinMargin float64

	// timeParser — used as a fallback for stage-0 reminder grammar matches
	// (where the extractor didn't run). Shared with the router's extractor.
	// The production dateparser will replace StubDateTimeParser here too.
	timeParser router.DateTimeParser

	// dialogueSessions carries slots across turns for follow-ups (single-user
	// box → one session slot, keyed voiceDialogueID). nil ⇒ no carry-over.
	dialogueSessions *dialogue.SessionStore

	// clarifyStore parks the request behind an open question she asked (see
	// clarify.go). nil ⇒ she falls back to the canned "не поняла" reply.
	clarifyStore *dialogue.ClarifyStore

	// clarifyMaxAttempts — questions per request before she gives up out loud.
	// 0 ⇒ dialogue.DefaultMaxAttempts (3). Set from VoiceConfig.
	clarifyMaxAttempts int

	// extractor parses the answer to an open question, with the same parsers
	// the router's own stage-2 uses.
	extractor router.Extractor

	// pending destructive-act confirmation. A destructive act replies with a
	// "выполнить X? да/нет" prompt and parks here; the NEXT utterance is read as
	// the y/n answer. ponytail: single slot, single-user box — a second act
	// while one waits overwrites it (last-asked wins); expires after confirmTTL.
	mu             sync.Mutex
	pending        *pendingAct
	pendingRoutine *pendingRoutineConfirm // routine proposal awaiting y/n
	pendingHexis   *pendingHexisExec      // mutating Hexis capability awaiting y/n

	ecosystem *ecosystemWiring // nexus + hexis + praxis clients
}

// pendingHexisExec — a mutating Hexis capability parked awaiting a spoken
// confirm. The confirmation is bound to the resolved capability + canonical
// target entity so a later "да" can only execute exactly what was proposed
// (ecosystem invariant: protected actions require bound confirmation).
type pendingHexisExec struct {
	capabilityID string
	capName      string
	entityID     string
	displayName  string
	expiry       time.Time
}

// pendingRoutineConfirm — a proposed routine awaiting a spoken y/n to become
// a recurring reminder. Set by detectPattern after creating a proposal.
type pendingRoutineConfirm struct {
	routineID int64
	action    string
	object    string
	interval  float64
	phrase    string
	expiry    time.Time
}

// pendingAct — a destructive act awaiting a spoken confirm.
type pendingAct struct {
	fn     string
	args   []string
	phrase string
	expiry time.Time
}

// confirmTTL — how long a parked destructive confirm stays answerable. Short:
// a confirm is a same-breath gesture; a stale prompt shouldn't fire on an
// unrelated later "да".
const confirmTTL = 90 * time.Second

// HandlePushToTalk — the full reactive round-trip. Each step's failure
// surfaces as a short reply text + empty audio OR an error; the voice
// server translates an error into a wire RpcError. Today the handler
// prefers a canned error-reply over an error return (a user-facing "didn't
// catch that" is better than a wire error the client surfaces as
// "internal"); the only error returned is a synthesizer fault (no audio
// to ship back).
func (h *reactiveHandler) HandlePushToTalk(ctx context.Context, req voice.PushToTalkReq, _ uint64) (voice.PushToTalkResp, error) {
	// 1. stt — transcribe the audio.
	text, _, err := h.stt.Transcribe(ctx, req.Audio)
	if err != nil {
		log.Printf("voice: stt error: %v", err)
		return h.reply(ctx, "не получилось разобрать речь — попробуй ещё раз.", nil)
	}
	if text == "" {
		return h.reply(ctx, "ничего не услышала — попробуй ещё раз.", nil)
	}
	log.Printf("voice: stt → %q", text)

	// 1b. confirm turn — if a destructive act is parked, this utterance is its
	// y/n answer, not a fresh command. Handled before routing so "да" doesn't
	// get classified as some other intent.
	if reply, handled := h.resolveConfirm(ctx, text); handled {
		return h.reply(ctx, reply, nil)
	}

	// 1b2. expired clarify — a question was parked but its TTL ran out, so the
	// request behind it is gone. Say that out loud (see clarify.go) and carry
	// on: these words are still routed as a fresh utterance below, with the
	// notice glued in front of whatever the fresh routing answers. Checked
	// BEFORE the answer path: reading a parked question drops an expired one.
	expiredNotice := h.clarifyExpiredNotice()

	// 1b3. clarify answer — if she asked a live question last turn, this
	// utterance is its answer, not a fresh command. After the confirm check: a
	// y/n gate is armed by her own prompt and is the narrower claim on the
	// utterance.
	if reply, handled := h.resolveClarifyAnswer(ctx, text); handled {
		return h.reply(ctx, reply, nil)
	}

	// 1c. quiet-hours toggle — keyword match, not classifier-dependent.
	// "тихий режим" / "quiet on" would route through the classifier
	// unreliably (it's a command, not a free-form query), so we match it
	// before routing. Same pattern as the confirm turn above.
	if reply, handled := h.resolveQuietToggle(ctx, text); handled {
		return h.reply(ctx, withNotice(expiredNotice, reply), nil)
	}

	// 2. router — classify the utterance.
	dec, err := h.router.Route(ctx, text, h.now())
	if err != nil {
		// ErrNoIntents ⇒ classifier unseeded (cold boot). reply with a
		// "still warming up" rather than a wire error.
		if errors.Is(err, router.ErrNoIntents) {
			return h.reply(ctx, withNotice(expiredNotice, "я ещё не понимаю свободную речь — скоро научусь."), nil)
		}
		log.Printf("voice: router error: %v", err)
		return h.reply(ctx, withNotice(expiredNotice, "не получилось разобрать команду."), nil)
	}

	// 2b. dialogue — fill this turn's missing slots from a prior same-intent
	// turn (follow-ups like «напомни завтра» → «…позвонить маме»), then remember
	// this turn for the next follow-up. Only same-intent, non-expired, non-
	// clarify turns carry (see followUpMerge). Best-effort: nil store ⇒ skipped.
	if h.dialogueSessions != nil {
		now := h.now()
		prev := h.dialogueSessions.Get(voiceDialogueID, now)
		dec = followUpMerge(prev, dec, now)
		if !dec.Clarify {
			h.rememberTurn(prev, dec, now)
		}
	}

	// 2c. clarify — she is not sure. If one named thing is missing, ask about it
	// and park the request (clarify.go); otherwise the replier's canned reply
	// stands.
	if dec.Clarify {
		if question, asked := h.askClarify(dec); asked {
			return h.reply(ctx, withNotice(expiredNotice, question), nil)
		}
	}

	// 3. action — execute the decision's intent. errors here surface as
	// short reply text (the user wants to know the action didn't land);
	// the round-trip stays alive.
	replyText := h.applyAction(ctx, dec)

	// 4. replier — phrase the reply across the router decision.
	if replyText == "" {
		replyText = h.replier.Reply(dec)
	}

	// 5. tts — synthesise the reply text; return to the voice server which
	// ships it back on the conn.
	return h.reply(ctx, withNotice(expiredNotice, replyText), nil)
}

// handleText — the core reactive path without stt/tts: confirm check →
// route → dialogue → action → replier. Used by the IPC Chat endpoint
// (and eventually by telegram). Splits out the audio bookends from
// HandlePushToTalk so text channels share the same routing logic.
func (h *reactiveHandler) handleText(ctx context.Context, text string) string {
	log.Printf("voice: handleText: %q", text)
	// 1b. confirm turn — if a destructive act is parked, this utterance is its
	// y/n answer. Same check as HandlePushToTalk.
	if reply, handled := h.resolveConfirm(ctx, text); handled {
		return reply
	}

	// 1b2/1b3. expired clarify then clarify answer — same order and reasons as
	// HandlePushToTalk.
	expiredNotice := h.clarifyExpiredNotice()
	if reply, handled := h.resolveClarifyAnswer(ctx, text); handled {
		return reply
	}

	// 2. router — classify the utterance.
	dec, err := h.router.Route(ctx, text, h.now())
	if err != nil {
		if errors.Is(err, router.ErrNoIntents) {
			return withNotice(expiredNotice, "я ещё не понимаю свободную речь — скоро научусь.")
		}
		log.Printf("voice: handleText router error: %v", err)
		return withNotice(expiredNotice, "не получилось разобрать команду.")
	}
	log.Printf("voice: route result: intent=%s slots=%+v", dec.Intent, dec.Slots)

	// 2b. dialogue — same as HandlePushToTalk.
	if h.dialogueSessions != nil {
		now := h.now()
		prev := h.dialogueSessions.Get(voiceDialogueID, now)
		dec = followUpMerge(prev, dec, now)
		if !dec.Clarify {
			h.rememberTurn(prev, dec, now)
		}
	}

	// 2c. clarify — same as HandlePushToTalk: ask about the one missing thing.
	if dec.Clarify {
		if question, asked := h.askClarify(dec); asked {
			return withNotice(expiredNotice, question)
		}
	}

	// 3. action — execute the decision's intent.
	replyText := h.applyAction(ctx, dec)
	log.Printf("voice: applyAction returned: %q", replyText)

	// 4. replier — phrase the reply when applyAction returned "".
	if replyText == "" {
		replyText = h.replier.Reply(dec)
	}
	return withNotice(expiredNotice, replyText)
}

// applyAction — executes the router's Decision. Intent-by-intent:
//
//   - IntentFact: WriteFact via CoreAPI. Source = "tap:voice" (a voice
//     capture is a tap; confidence 1.0).
//   - IntentReminder: CreateReminder via CoreAPI.
//   - IntentAct: tool-executor deferred (no-op today; the reply says so).
//   - IntentNote / IntentQuery: chroma/RAG deferred (no-op; reply says so).
//   - Clarify: the router's stage-3 fired; no action.
//
// Returns "" when the Replier should phrase the reply (the default path);
// returns a non-empty string when the action path wants to OVERRIDE the
// reply text (e.g. an action error the user should hear SPECIFICALLY, not
// a generic "ok"). Errors surface as a short reply text the user hears.
func (h *reactiveHandler) applyAction(ctx context.Context, dec router.Decision) string {
	if dec.Clarify {
		return "" // the Replier phrases clarify
	}
	if handler, ok := actionHandlers[dec.Intent]; ok {
		return handler(h, ctx, dec)
	}
	return ""
}

// detectPattern extracts an event from the written fact and runs the pattern
// detector. If a stable recurring pattern is found and no proposed routine
// exists for this action+object yet, one is created and the user is prompted
// to confirm via the park() mechanism. Returns the suggestion phrase when a
// new proposal was created and parked; "" otherwise.
func (h *reactiveHandler) detectPattern(ctx context.Context, factID int64, key, value string, ts time.Time) string {
	ev := pattern.Extract(factID, key, value, ts)
	if ev == nil {
		return "" // not an actionable event
	}
	if _, err := h.dataStore.CreateEvent(ctx, factID, ev.Action, ev.Object, ts); err != nil {
		log.Printf("voice: create event: %v", err)
		return ""
	}
	// Detect+propose (Vikunja #43) is shared with the digestion tick's
	// proactive scan — see patterns.go. Event *extraction* above stays here,
	// tied to this fact write; detection over the accumulated history does
	// not need to happen right now for the voice path to have already done
	// its job — it's dedupe-safe to also let the next tick find the same
	// pattern independently.
	r, id, err := detectAndPropose(ctx, h.dataStore, ev.Action, ev.Object, ts)
	if err != nil {
		log.Printf("voice: detect pattern %s/%s: %v", ev.Action, ev.Object, err)
		return ""
	}
	if r == nil {
		return "" // not enough data, too irregular, or already proposed/decided
	}
	log.Printf("voice: proposed routine: %s/%s every %.1f days", r.Action, r.Object, r.IntervalDays)

	// Park the proposal for voice confirmation.
	phrase := pattern.PhraseRoutine(r)
	h.mu.Lock()
	h.pendingRoutine = &pendingRoutineConfirm{
		routineID: id,
		action:    r.Action,
		object:    r.Object,
		interval:  r.IntervalDays,
		phrase:    phrase,
		expiry:    ts.Add(confirmTTL),
	}
	h.mu.Unlock()
	return phrase
}

// resolveQuietToggle — pre-route keyword check. Returns (reply, true) when
// the utterance is a quiet-on/off command; ("", false) otherwise. Called from
// HandlePushToTalk BEFORE the router so a classifier miscue can't drop it.
func (h *reactiveHandler) resolveQuietToggle(ctx context.Context, text string) (string, bool) {
	u := strings.ToLower(strings.TrimSpace(text))
	var on, off bool
	// Match as whole-token phrases so "тихий" in "тихий режим включи" still
	// catches, but "тихий" alone in "очень тихий сегодня день" doesn't fire.
	// The confirm turn is handled above, so "да"/"нет" won't reach here.
	for _, kw := range []string{"quiet on", "quiet mode", "тихий режим", "тихий", "не шуми", "не беспокоить", "тихо"} {
		if strings.Contains(u, kw) {
			on = true
			break
		}
	}
	if !on {
		for _, kw := range []string{"quiet off", "quiet end", "громкий режим", "шумный режим", "отмени тихий", "выключи тихий", "не тихо"} {
			if strings.Contains(u, kw) {
				off = true
				break
			}
		}
	}
	if !on && !off {
		return "", false
	}
	val := "false"
	reply := "тихий режим выключен."
	if on {
		val = "true"
		reply = "тихий режим включён. буду реже напоминать."
	}
	if _, err := h.api.WriteFact(ctx, ipc.WriteFactReq{
		Ts:         h.now(),
		Kind:       "config",
		Key:        "quiet_hours",
		Value:      val,
		Source:     "tap:voice",
		Confidence: 1.0,
	}); err != nil {
		log.Printf("voice: write quiet_hours: %v", err)
		return "не получилось переключить тихий режим.", true
	}
	return reply, true
}

// replySystem answers system-observable queries using the handler's clock
// and (in future) system interfaces. The decision's utterance is parsed
// for keywords to determine what the user is asking about.
func (h *reactiveHandler) replySystem(ctx context.Context, dec router.Decision) string {
	u := strings.ToLower(dec.Utterance)
	now := h.now()

	// stage-0 grammars catch the exact time/date patterns, but duration
	// queries ("сколько времени прошло") bypass the grammar's build filter
	// and can reach replySystem via the classifier path. Guard against them.
	if hasDurationWords(u) {
		return "пока не умею отвечать на этот вопрос."
	}

	switch {
	case strings.Contains(u, "час") || strings.Contains(u, "врем"):
		// "который час в киеве" — she keeps one clock, so any named place gets
		// the honest answer. Never local time dressed up as the city's.
		if mentionsUnknownPlace(u) {
			return onlyLocalTimeReply
		}
		return "сейчас " + ruClock(now)
	case strings.Contains(u, "день") || strings.Contains(u, "числ"):
		// "какое число завтра" — answer for the day the user asked about,
		// not today. Reuses the router's calendar day-word parser.
		day := now
		prefix := "сегодня"
		if d, ok := router.ParseCalendarDate(u, now); ok {
			day = d
			prefix = dayPrefix(now, d)
		} else if mentionsUnknownDay(u) {
			// He named a day she cannot work out ("в пятницу", "через неделю").
			// Answering today's date here would be the same silent wrong answer
			// this arm was fixed for, so say what she can do instead.
			return onlyNearDaysReply
		}
		dow := ruWeekdays[day.Weekday()]
		month := ruMonths[day.Month()-1]
		return fmt.Sprintf("%s %s, %d %s %d года", prefix, dow, day.Day(), month, day.Year())
	case strings.Contains(u, "кто дома") || strings.Contains(u, "человек дома"):
		return "присутствие пока не подключено к голосовому запросу."
	case strings.Contains(u, "памят") || strings.Contains(u, "процессор") || strings.Contains(u, "загрузк") || strings.Contains(u, "статус") || strings.Contains(u, "работа") || strings.Contains(u, "сервис") || strings.Contains(u, "диск") || strings.Contains(u, "ip") || strings.Contains(u, "аптайм") || strings.Contains(u, "трафик") || strings.Contains(u, "интернет"):
		return "системная статистика пока не подключена."
	default:
		return "пока не умею отвечать на этот вопрос."
	}
}

// chatHistory collects dialogue turns from the session store for the current
// conversation. Returns prior user utterances (newest last) up to a depth of
// 4 turns. Returns nil when there's no session or no history.
func (h *reactiveHandler) chatHistory() []dialogue.Turn {
	if h.dialogueSessions == nil {
		return nil
	}
	now := h.now()
	prev := h.dialogueSessions.Get(voiceDialogueID, now)
	if prev == nil {
		return nil
	}
	// History already includes the immediate prior turn (set by the dialogue
	// merge at lines 373-395), plus up to 3 more from deeper history.
	out := make([]dialogue.Turn, 0, 1+len(prev.History))
	out = append(out, dialogue.Turn{
		Intent: prev.Intent,
		Slots:  prev.Slots,
		Text:   prev.Slots.Text,
	})
	out = append(out, prev.History...)
	return out
}

// reply wraps a text reply through TTS to produce a PushToTalkResp. If TTS
// fails, the response carries an empty audio + the text — the client can
// still display text if it can't play. The routedChannels field is
// reserved for a future "the dispatcher also forwarded to ntfy/telegram"
// reply (today the reactive path doesn't dispatch nudges; that's the loop
// tick's job).
func (h *reactiveHandler) reply(ctx context.Context, text string, _ []string) (voice.PushToTalkResp, error) {
	spoken := ttsnorm.Speakable(text)
	log.Printf("voice: reply → %q", text)
	audioOut, err := h.tts.Synthesize(ctx, spoken)
	if err != nil {
		log.Printf("voice: tts error: %v", err)
		return voice.PushToTalkResp{ReplyText: text, ReplyAudio: audio.Audio{}}, nil
	}
	return voice.PushToTalkResp{ReplyText: text, ReplyAudio: audioOut}, nil
}

// pickLLMRouter returns the LLM router when the operator asked for it and there
// is a llama-server to talk to, and nil otherwise. nil is safe: the cascade then
// routes with the classifier, so an unusable setting costs accuracy, not turns.
func pickLLMRouter(enabled bool, c *llm.Client) *router.LLMRouter {
	if !enabled {
		return nil
	}
	if c == nil {
		log.Printf("voice: voice.llm_router is on but there is no llama-server to route with (the phraser is not an LLM phraser) — using the classifier instead")
		return nil
	}
	log.Printf("voice: LLM router enabled")
	return router.NewLLMRouter(c)
}

// buildRouter constructs the reactive-path router with the given embedder
// and confidence threshold.
//   - stage-0 grammars from DefaultActMatcher whose fn allowlist is exactly
//     the enabled tool names (actFns) — the router only matches acts the
//     executor can run. Empty ⇒ every act refuses at the matcher.
//   - The embedder is provided by wireVoice: HashEmbedder (floor) when no
//     embedder config is present, or the ONNX multilingual model when
//     configured — same interface, one constructor change.
//   - 6 bootstrap examples covering the 5 intents + one compound-capture
//     placeholder. Spec calls for ~10 per intent at production; this is the
//     bootstrapping floor swapped by tuning the seed set later.
//   - Threshold is from voice.router_threshold config (default 0.55).
func buildRouter(emb router.Embedder, acts router.ActMatcher, threshold float64, llmR *router.LLMRouter) *router.Router {
	cls := router.NewClassifier(emb)
	seedClassifier(cls)
	grammars := router.DefaultGrammars(acts)
	grammars = append(grammars, router.SystemTimeDateGrammars()...)
	grammars = append(grammars, router.ReminderGrammar())
	return router.New(router.Config{
		Grammars:   grammars,
		Classifier: cls,
		Extractor: router.Extractor{
			Time:  router.NewPythonDateParser(),
			Acts:  acts,
			Facts: router.DefaultFactParser{},
		},
		Threshold: threshold,
		LLM:       llmR,
	})
}

// seedDir is the directory containing intent seed files. Each file is named
// <intent>.txt and contains one training example per line (blank lines and
// lines starting with # are ignored). Relative to the working directory.
const seedDir = "models/seeds"

// seedClassifier floors the embedded examples so the cold-boot path
// doesn't return ErrNoIntents. Loads examples from seedDir — one file per
// intent (act.txt, reminder.txt, fact.txt, note.txt, query.txt). When the
// classifier can't decide it falls through to Clarify — the last-resort
// path asks the user to rephrase rather than guessing wrong.
func seedClassifier(c *router.Classifier) {
	intents := []router.Intent{
		router.IntentAct,
		router.IntentReminder,
		router.IntentFact,
		router.IntentNote,
		router.IntentQuery,
		router.IntentChat,
		router.IntentSystem,
	}
	total := 0
	for _, intent := range intents {
		n, err := loadSeedFile(c, intent)
		if err != nil {
			log.Printf("voice: seed %s: %v", intent, err)
			continue
		}
		total += n
	}
	log.Printf("voice: loaded %d seed examples from %s", total, seedDir)
}

func loadSeedFile(c *router.Classifier, intent router.Intent) (int, error) {
	path := filepath.Join(seedDir, string(intent)+".txt")
	f, err := os.Open(path)
	if err != nil {
		return 0, fmt.Errorf("open %s: %w", path, err)
	}
	defer f.Close()

	var count int
	sc := bufio.NewScanner(f)
	for sc.Scan() {
		line := strings.TrimSpace(sc.Text())
		if line == "" || strings.HasPrefix(line, "#") {
			continue
		}
		if err := c.AddExample(context.Background(), intent, line); err != nil {
			log.Printf("voice: seed %s: skipping %q: %v", intent, line, err)
			continue
		}
		count++
	}
	if err := sc.Err(); err != nil {
		return count, fmt.Errorf("scan %s: %w", path, err)
	}
	return count, nil
}

// park stores a destructive act awaiting confirmation. Overwrites any prior
// pending (last-asked wins — single-user box).
func (h *reactiveHandler) park(fn string, args []string, phrase string) {
	h.mu.Lock()
	h.pending = &pendingAct{fn: fn, args: args, phrase: phrase, expiry: h.now().Add(confirmTTL)}
	h.mu.Unlock()
}

// resolveConfirm interprets an utterance as the answer to a parked destructive
// act OR a parked routine proposal. Returns (reply, true) when it consumed the
// utterance as a y/n answer; ("", false) when there's nothing pending (or the
// parked act expired), so the caller routes the utterance normally. An
// unrecognised answer cancels the pending and routes normally — a confirm that
// can't be answered clearly is safer abandoned than left armed.
func (h *reactiveHandler) resolveConfirm(ctx context.Context, text string) (string, bool) {
	h.mu.Lock()
	defer h.mu.Unlock()

	// Check routine proposal first (newer feature; checked before tool confirm
	// so a routine confirm doesn't get eaten by a stale tool pending).
	pr := h.pendingRoutine
	if pr != nil && !h.now().After(pr.expiry) {
		switch classifyConfirm(text) {
		case confirmYes:
			h.pendingRoutine = nil
			// Only record the acceptance. The tick loop reads accepted
			// routines and nudges on their own interval. Building a reminder
			// here made a routine fire exactly once (Vikunja #366).
			if err := h.dataStore.AcceptProposedRoutine(ctx, pr.routineID, h.now()); err != nil {
				log.Printf("voice: accept proposed routine: %v", err)
				return "не получилось запомнить рутину.", true
			}
			return "буду напоминать.", true
		case confirmNo:
			h.pendingRoutine = nil
			if err := h.dataStore.DismissProposedRoutine(ctx, pr.routineID); err != nil {
				log.Printf("voice: dismiss proposed routine: %v", err)
			}
			return "хорошо, не буду.", true
		default:
			// unclear: abandon the routine proposal, route normally.
			h.pendingRoutine = nil
			return "", false
		}
	}
	// Clear expired routine if it existed.
	if pr != nil {
		h.pendingRoutine = nil
	}

	// Check pending Hexis execution confirm. Bound to the exact capability +
	// target that was proposed; a stray "да" can only run that, nothing else.
	if hx := h.pendingHexis; hx != nil {
		if h.now().After(hx.expiry) {
			h.pendingHexis = nil
		} else {
			switch classifyConfirm(text) {
			case confirmYes:
				h.pendingHexis = nil
				return h.execHexis(ctx, hx.capabilityID, hx.capName, hx.entityID, hx.displayName), true
			case confirmNo:
				h.pendingHexis = nil
				return "отменила.", true
			default:
				h.pendingHexis = nil
				return "", false
			}
		}
	}

	// Check tool confirm (existing behavior).
	p := h.pending
	if p == nil {
		return "", false
	}
	if h.now().After(p.expiry) {
		h.pending = nil
		return "", false
	}
	switch classifyConfirm(text) {
	case confirmYes:
		h.pending = nil
		out, err := h.tools.Exec(ctx, p.fn, p.args, true) // confirmed
		if err != nil {
			log.Printf("voice: tool %s (confirmed): %v", p.fn, err)
			if out != "" {
				return "не получилось выполнить команду: " + firstLine(out), true
			}
			return "не получилось выполнить команду.", true
		}
		if out != "" {
			return "готово: " + firstLine(out), true
		}
		return "готово.", true
	case confirmNo:
		h.pending = nil
		return "отменила.", true
	default:
		// unclear answer: abandon the confirm, route this utterance normally.
		h.pending = nil
		return "", false
	}
}

// proposeGap scaffolds a 'proposed' tool for an act whose verb isn't enabled.
// maven drafts the registration (name = the verb, provenance = the utterance);
// a human enables it on the authed surface. She suggests, never enables.
func (h *reactiveHandler) proposeGap(ctx context.Context, dec router.Decision) string {
	name := firstWord(stripWake(dec.Utterance))
	if name == "" {
		return "не разобрала команду — попробуй иначе."
	}
	newly, err := h.api.ProposeTool(ctx, name, dec.Utterance, "", h.now())
	if err != nil {
		log.Printf("voice: propose tool %q: %v", name, err)
		return "команды «" + name + "» нет в списке разрешённых."
	}
	if newly {
		return "команды «" + name + "» нет в списке. Предложила её добавить — включи через клиент."
	}
	return "команды «" + name + "» пока нет в списке — она уже предложена, включи через клиент."
}

// confirmVerdict — the parse of a y/n confirm answer.
type confirmVerdict int

const (
	confirmUnknown confirmVerdict = iota
	confirmYes
	confirmNo
)

// classifyConfirm reads a short ru/en yes-or-no answer. Substring match on the
// stems so inflections/fillers ("да, давай", "нет, отмени") still land.
func classifyConfirm(text string) confirmVerdict {
	t := strings.ToLower(strings.TrimSpace(text))
	// negatives first — "не надо" contains no "да", but check no-stems before
	// yes so a leading "нет" isn't shadowed.
	for _, no := range []string{"нет", "не надо", "отмен", "стоп", "no", "cancel", "stop", "don't"} {
		if strings.Contains(t, no) {
			return confirmNo
		}
	}
	for _, yes := range []string{"да", "ага", "давай", "подтвер", "конечно", "yes", "yeah", "yep", "confirm", "ок", "okay", "ok"} {
		if strings.Contains(t, yes) {
			return confirmYes
		}
	}
	return confirmUnknown
}

// actPhrase renders "fn arg1 arg2" for the confirm prompt.
func actPhrase(fn string, args []string) string {
	if len(args) == 0 {
		return fn
	}
	return fn + " " + strings.Join(args, " ")
}

// seedTools upserts the config-declared tools into the store as enabled. Editing
// mavend.json is a human act, so a config tool is enabled by definition; this
// makes the declarative config the reproducible bootstrap while the store stays
// the single runtime source of truth (mavweb enables ad-hoc ones on top).
func seedTools(api ipc.CoreAPI, tools []config.ToolConfig) {
	ctx := context.Background()
	now := time.Now()
	n := 0
	for _, tc := range tools {
		if tc.Name == "" || len(tc.Cmd) == 0 {
			log.Printf("voice: skipping malformed tool config %+v", tc)
			continue
		}
		if err := api.EnableTool(ctx, tc.Name, tc.Cmd, tc.Destructive, tc.Scope, now); err != nil {
			log.Printf("voice: seed tool %q: %v", tc.Name, err)
			continue
		}
		n++
	}
	log.Printf("voice: seeded %d act tools from config", n)
}

// reembedOnStart is the -reembed flag (set in run()). Opt-in on purpose: see
// runReembed.
var reembedOnStart bool

// checkStoredEmbedder compares the embedder we just loaded with the one that
// wrote the vectors already in the DB (Vikunja #378).
//
// The two models we have both make 384-dim vectors, so a size check catches
// nothing: after a swap, recall silently compares vectors from different
// spaces and the scores are noise. So we say it out loud. Recall itself is not
// changed here — the fix is `mavend -reembed`.
func checkStoredEmbedder(dataStore *store.Store, emb router.Embedder) {
	if dataStore == nil {
		return
	}
	current := router.EmbedderID(emb)
	if reembedOnStart {
		runReembed(dataStore, emb, current)
		return
	}
	stored, mismatch, err := dataStore.CheckEmbedder(context.Background(), current)
	if err != nil {
		log.Printf("voice: embedder marker check failed: %v", err)
		return
	}
	if mismatch {
		log.Printf("voice: WARNING embedder MISMATCH — stored vectors were written by %q but the configured embedder is %q; recall scores are noise until the notes and facts are re-embedded — run `mavend -reembed` once (Vikunja #378)", stored, current)
		return
	}
	log.Printf("voice: embedder marker ok (%s)", current)
}

// runReembed is the one-shot backfill behind -reembed.
//
// Why a flag and not automatic on mismatch: the embedder is ONNX on the
// laptop's CPU, so a few thousand notes is minutes of work. Doing that silently
// inside a normal start would look like the daemon hanging on boot. So the user
// runs it once, deliberately, after an embedder swap; the mismatch warning
// above tells them to. It re-embeds, logs what it did, and then the daemon
// carries on serving as usual — no separate binary, no second start needed.
func runReembed(dataStore *store.Store, emb router.Embedder, current string) {
	log.Printf("voice: re-embedding stored notes and facts with %s — this can take a few minutes, do not interrupt", current)
	res, err := dataStore.ReembedAll(context.Background(), current,
		// EmbedPassage, not EmbedQuery: these are stored texts being searched
		// FOR, which is the side they were written with.
		func(ctx context.Context, text string) ([]float32, error) {
			return router.EmbedPassage(ctx, emb, text)
		})
	if err != nil {
		log.Printf("voice: re-embed FAILED, nothing was changed and no marker was written — safe to run again: %v", err)
		return
	}
	if res.Skipped {
		log.Printf("voice: re-embed skipped — the stored vectors were already written by %s", current)
		return
	}
	log.Printf("voice: re-embed done — %d notes in the notes table, %d notes and %d facts in the memory index, took %s; stored vectors now belong to %s",
		res.Notes, res.MemNotes, res.Facts, res.Took.Round(time.Second), current)

	// A row with no text cannot be re-embedded, so its vector is still the old
	// model's noise while the marker now says everything is current. Both write
	// paths always store the text, so this should be zero — say it loudly
	// rather than bury it in the line above if it ever isn't.
	if res.NoText > 0 {
		log.Printf("voice: WARNING %d stored rows had no text, so their vectors could not be re-embedded and are still noise; they will never match anything useful (Vikunja #378)", res.NoText)
	}
}