// Package main is mavend — maven's daemon.
//
// "core = the only key-holder": one process holds the unlocked store + the
// trigger loop; modules are separate processes, key-free, fail-independent.
// the daemon wires Store → Gatherer → Tick → phraser → delivery, runs the 60s
// ticker, owns the cold-start unlock dance, and exposes the CoreAPI boundary
// over a unix socket for modules (router/delivery/poller/...) to call.
//
// Floor (this file): pluggable seams wired with the deterministic Stubs.
//   - phraser Stub (no LLM)
//   - voice sink wired via wireVoice: embedder/classifier seeded with ~10
//     examples across 5 intents; stt + tts stubs in-process by default,
//     remote module sockets when configured; TCP listener on voice.bind.
//     The voice sink (voicesink.Sink via Sessions) is wired into the
//     dispatcher — the reactive path (push-to-talk) AND proactive nudges
//     (care-when-present, sev3/sev4 present) both route through the same
//     stt→router→tts→client pipeline.
//   - auth FloorEnrollment + nil Session — cold-start unlock assumed: today
//     the store opens plain sqlite (sqlcipher deferred). the daemon runs
//     "unlocked" — the locked-until-asserted dance lands with the Session
//     verifier + ask-password transport (open spec item).
//
// Everything wired here is swappable at the construction seam — every module
// behind an interface — without changing the loop. Wire a real phraser, voice
// sink, or session verifier, and the daemon's main loop is unchanged.
package main

import (
	"context"
	"errors"
	"flag"
	"fmt"
	"log"
	"net"
	"os"
	"os/signal"
	"sync"
	"syscall"
	"time"

	"github.com/kami/maven/internal/auth"
	"github.com/kami/maven/internal/config"
	"github.com/kami/maven/internal/delivery"
	"github.com/kami/maven/internal/delivery/ntfysink"
	"github.com/kami/maven/internal/delivery/telegramsink"
	"github.com/kami/maven/internal/ipc"
	"github.com/kami/maven/internal/loop"
	"github.com/kami/maven/internal/phraser"
	"github.com/kami/maven/internal/store"
)

func main() {
	if err := run(os.Args[1:]); err != nil {
		fmt.Fprintln(os.Stderr, "mavend:", err)
		os.Exit(1)
	}
}

func run(args []string) error {
	cfgPath := flag.String("config", defaultConfigPath(), "path to mavend JSON config")
	flag.CommandLine.Parse(args)
	cfg, err := config.Load(*cfgPath)
	if err != nil {
		return err
	}

	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
	defer stop()

	// ----- store (the unlocked handle; core = the only key-holder) -----
	st, err := store.Open(ctx, cfg.DBPath)
	if err != nil {
		return fmt.Errorf("open store: %w", err)
	}
	defer st.Close()

	// ----- loop: rules + gatherer -----

	rules := loop.DefaultRules()
	gatherer := loop.NewGatherer(st, rules)

	// ----- phraser (LLM-backed when configured, Stub floor otherwise) -----
	var phr phraser.Phraser = phraser.NewStub()
	if cfg.Phraser != nil {
		pc := phraser.Config{
			ModelPath:  cfg.Phraser.ModelPath,
			BinPath:    cfg.Phraser.BinPath,
			Listen:     cfg.Phraser.Listen,
			NGpuLayers: cfg.Phraser.NGpuLayers,
			NCtx:       cfg.Phraser.NCtx,
			Timeout:    time.Duration(cfg.Phraser.Timeout),
		}
		if pc.BinPath == "" {
			pc.BinPath = "llama-server"
		}
		if pc.Listen == "" {
			pc.Listen = "127.0.0.1:0"
		}
		if pc.NCtx <= 0 {
			pc.NCtx = 2048
		}
		if pc.Timeout <= 0 {
			pc.Timeout = 30 * time.Second
		}
		var err error
		phr, err = phraser.NewLLMPhraser(ctx, pc)
		if err != nil {
			return fmt.Errorf("phraser: %w", err)
		}
	}
	defer phr.Close()

	// ----- voice: reactive audio path (TCP listener + stt/router/tts) -----
	voiceW, err := wireVoice(cfg, ipc.NewStoreAPI(st))
	if err != nil {
		return fmt.Errorf("wire voice: %w", err)
	}
	defer voiceW.close()

	// ----- delivery: sinks + dispatcher -----
	var ntfy delivery.Sink
	if cfg.Ntfy != nil {
		s, err := ntfysink.New(*cfg.Ntfy)
		if err != nil {
			return fmt.Errorf("wire ntfy sink: %w", err)
		}
		ntfy = s
	}
	var telegram delivery.Sink
	if cfg.Telegram != nil {
		s, err := telegramsink.New(*cfg.Telegram)
		if err != nil {
			return fmt.Errorf("wire telegram sink: %w", err)
		}
		telegram = s
	}
	// Voice sink: nil when voice is not enabled — the dispatcher's nil-sink
	// path skips ChannelVoice silently, just like the pre-voice floor).
	var voiceSink delivery.Sink
	if voiceW != nil {
		voiceSink = voiceW.voiceSink
	}
	dispatcher := delivery.NewDispatcher(delivery.Config{
		Ntfy:     ntfy,
		Telegram: telegram,
		Voice:    voiceSink,
		// AckTracker nil ⇒ repeat-til-ack disabled in the dispatcher. We
		// drive repeats from store.UnackedTelegramRules + Dispatcher.RepeatUnacked
		// below, which uses the nudges table's outcome=pending row itself as
		// the ack-or-not state — the production ack source. The AckTracker
		// interface stays reserved for an in-memory cache if the daemon ever
		// wants to drive repeats without the SQL hit; the table IS the truth.
		Nudges:    st, // *store.Store satisfies delivery.NudgeRecorder
		Reminders: st, // *store.Store satisfies delivery.ReminderCompleter
	})

	// ----- the proactive loop driver (60s ticker, lives HERE per spec) -----
	tickInterval := time.Duration(cfg.TickInterval)
	repeatInterval := time.Duration(cfg.RepeatInterval)
	autotuneInterval := time.Duration(cfg.AutotuneInterval)
	loop := newTickLoop(st, gatherer, dispatcher, phr, rules, tickInterval, repeatInterval, autotuneInterval)

	// ----- IPC boundary (core ↔ modules) -----
	coreAPI := ipc.NewStoreAPI(st)
	srv, err := ipc.Listen(cfg.SocketPath, coreAPI)
	if err != nil {
		return fmt.Errorf("ipc listen: %w", err)
	}
	// auth floor: any same-uid caller is fully trusted (FloorEnrollment +
	// FloorSession — L3, step-up satisfied). The cold-start unlock dance and a
	// real passkey Session are the open spec items; today the daemon runs
	// unlocked — plain sqlite, sqlcipher deferred. FloorSession keeps the floor
	// consistent so the authed mavweb /tools page can EnableTool (AuthStepUp)
	// against the local socket; the passkey verifier swaps FloorSession later.
	srv.Check = (&auth.Gate{Enrollment: auth.NewFloorEnrollment(), Session: auth.FloorSession{}}).Check

	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		defer wg.Done()
		if err := srv.Serve(); err != nil && !errors.Is(err, net.ErrClosed) {
			log.Printf("ipc serve: %v", err)
		}
	}()
	log.Printf("mavend: ipc listening on %s", srv.Path())

	if voiceW != nil {
		wg.Add(1)
		go func() {
			defer wg.Done()
			if err := voiceW.server.Serve(); err != nil && !errors.Is(err, net.ErrClosed) {
				log.Printf("voice serve: %v", err)
			}
		}()
		log.Printf("mavend: voice listening on %s", voiceW.server.Addr())
	}

	wg.Add(1)
	go func() {
		defer wg.Done()
		loop.run(ctx)
	}()

	<-ctx.Done()
	log.Printf("mavend: shutdown signal received")
	if err := srv.Close(); err != nil {
		log.Printf("ipc close: %v", err)
	}
	wg.Wait()
	log.Printf("mavend: bye")
	return nil
}