// Cyrene v2 — LLM-powered AI companion platform.
// Single binary entry point that wires all services together.
package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"

	"git.yeij.top/AskaEth/Cyrene_v2/internal/config"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/db"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/nats"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/platform"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/plugin"

	"git.yeij.top/AskaEth/Cyrene_v2/plugins/calculator"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/crypto"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/datetime"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/file"
	httpplugin "git.yeij.top/AskaEth/Cyrene_v2/plugins/http"
	iotmock "git.yeij.top/AskaEth/Cyrene_v2/plugins/iot-mock"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/json"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/markdown"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/random"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/text"
	webfetch "git.yeij.top/AskaEth/Cyrene_v2/plugins/web-fetch"
	websearch "git.yeij.top/AskaEth/Cyrene_v2/plugins/web-search"

	"git.yeij.top/AskaEth/Cyrene_v2/services/ai-core/llm"
	aiCoreCtx "git.yeij.top/AskaEth/Cyrene_v2/services/ai-core/context"
	"git.yeij.top/AskaEth/Cyrene_v2/services/ai-core/orchestrator"
	"git.yeij.top/AskaEth/Cyrene_v2/services/ai-core/persona"
	"git.yeij.top/AskaEth/Cyrene_v2/services/ai-core/subsession"
	"git.yeij.top/AskaEth/Cyrene_v2/services/gateway/api"
	"git.yeij.top/AskaEth/Cyrene_v2/services/gateway/ws"
	"git.yeij.top/AskaEth/Cyrene_v2/services/memory"
	voicesvc "git.yeij.top/AskaEth/Cyrene_v2/services/voice"
)

func main() {
	log.SetFlags(log.LstdFlags | log.Lshortfile)
	log.Println("🧠 Cyrene v2 启动中...")

	// === 1. Platform & Config ===
	plat := platform.Detect()
	log.Printf("[platform] %s", plat.Summary())

	cfg, err := config.Load()
	if err != nil {
		log.Printf("[config] .env load failed: %v", err)
	}
	cfg.ValidateOrFatal()
	cfg.LogSanitized()
	plat.EnsureDirs()

	// === 2. Database ===
	database, err := db.Connect(db.Config{
		Host: cfg.PostgresHost, Port: cfg.PostgresPort,
		User: cfg.PostgresUser, Password: cfg.PostgresPassword,
		DBName: cfg.PostgresDB, SSLMode: cfg.PostgresSSLMode,
		MaxOpenConns: 25, MaxIdleConns: 5,
	})
	if err != nil {
		log.Printf("[db] warning: %v (running without persistence)", err)
	} else {
		defer database.Close()
		db.RunMigration(context.Background(), database, "memories", db.SplitSQL(memory.CreateTableSQL()))
	}

	// === 3. NATS (in-process) ===
	natsConn := nats.NewInProcess()
	log.Printf("[nats] ready")
	_ = natsConn

	// === 4. Plugin Registry ===
	reg := plugin.NewRegistry()
	pluginCfg := plugin.PluginConfig{
		DataDir:     cfg.DataDir,
		NATSURL:     cfg.NATSUrl,
		DatabaseURL: cfg.GetDatabaseURL(),
		LogLevel:    cfg.LogLevel,
	}

	// Load IoT plugin
	if cfg.IoTProvider == "mock" || cfg.IoTProvider == "" {
		reg.Register(iotmock.New(), pluginCfg)
	}

	// Load tool plugins
	reg.Register(calculator.New(), pluginCfg)
	reg.Register(datetime.New(), pluginCfg)
	reg.Register(crypto.New(), pluginCfg)
	reg.Register(random.New(), pluginCfg)
	reg.Register(text.New(), pluginCfg)
	reg.Register(json.New(), pluginCfg)
	reg.Register(markdown.New(), pluginCfg)
	reg.Register(file.New(), pluginCfg)
	reg.Register(httpplugin.New(), pluginCfg)
	reg.Register(webfetch.New(), pluginCfg)
	if cfg.SearXNGURL != "" {
		reg.Register(websearch.New(cfg.SearXNGURL), pluginCfg)
	}

	log.Printf("[plugin] loaded %d plugins: %v", reg.Count(), reg.ListNames())

	// === 5. Voice Service ===
	voiceSvc := voicesvc.New(voicesvc.Config{
		STTProvider:  cfg.ASRProvider,
		TTSProviders: []string{cfg.TTSProvider},
		DashScopeKey: cfg.DashScopeAPIKey,
	})
	log.Printf("[voice] ready")

	// === 6. Memory Service ===
	var memSvc *memory.Service
	if database != nil {
		memRepo := memory.NewRepository(database)
		memSvc = memory.NewService(memRepo)
		log.Printf("[memory] connected")
	} else {
		log.Printf("[memory] disabled (no database)")
	}

	// === 7. AI-Core: Persona ===
	personaLoader, err := persona.NewLoader(cfg.PersonaDir)
	if err != nil {
		log.Printf("[persona] load error: %v (using builtin)", err)
	}
	log.Printf("[persona] loaded %d persona(s): %v", personaLoader.Count(), personaLoader.List())
	personaInjector := persona.NewInjector(personaLoader.Default())

	// === 8. AI-Core: LLM Adapter ===
	llmCfg := llm.DefaultConfig()
	llmCfg.BaseURL = cfg.LLMBaseURL
	llmCfg.APIKey = cfg.LLMAPIKey
	llmCfg.Model = cfg.LLMModel
	llmCfg.FallbackModel = cfg.LLMFallbackModel
	llmSelector := llm.NewModelSelector(llmCfg)
	log.Printf("[llm] adapter ready (model=%s)", cfg.LLMModel)

	// === 9. AI-Core: Context Store ===
	ctxStore := aiCoreCtx.NewStore(4000, 50)
	log.Printf("[context] sliding window ready (4000 tokens, 50 turns)")

	// === 10. AI-Core: Sub-session Manager ===
	subMgr := subsession.NewManager(
		&subsession.GeneralProvider{},
		&subsession.MemoryProvider{},
		&subsession.IoTProvider{
			GetDeviceState: func(ctx context.Context) (string, error) {
				iot := reg.GetIoTProvider()
				if iot == nil {
					return "", fmt.Errorf("no iot provider")
				}
				devices, err := iot.ListDevices(ctx)
				if err != nil {
					return "", err
				}
				states := make([]orchestrator.DeviceState, len(devices))
				for i, d := range devices {
					states[i] = orchestrator.DeviceState{ID: d.ID, Name: d.Name, State: d.State}
				}
				return orchestrator.BuildIoTContext(states), nil
			},
		},
	)
	log.Printf("[subsession] 4 providers ready")

	// === 11. AI-Core: Orchestrator ===
	semanticCache := llm.NewSemanticCache()
	orch := orchestrator.NewPipeline(llmSelector, semanticCache, ctxStore, subMgr, personaInjector)
	log.Printf("[orchestrator] pipeline ready")

	// === 12. Gateway ===
	authMgr := api.NewStubAuthManager()
	apiRouter := api.New(authMgr)

	wsHub := ws.NewHub()
	wsMux := http.NewServeMux()
	wsMux.HandleFunc("/ws/chat", wsHub.UpgradeHandler())

	mainMux := http.NewServeMux()
	mainMux.Handle("/api/", apiRouter)
	mainMux.Handle("/ws/", wsMux)

	addr := fmt.Sprintf("%s:%d", cfg.Host, cfg.Port)
	srv := &http.Server{Addr: addr, Handler: mainMux}

	// === 13. Start ===
	go func() {
		log.Printf("[gateway] listening on %s", addr)
		log.Printf("[gateway] plugins=%d tools=%d", reg.Count(), len(reg.GetAllToolDefinitions()))
		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("[gateway] %v", err)
		}
	}()

	quit := make(chan os.Signal, 1)
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit

	log.Println("[gateway] shutting down...")
	reg.Shutdown()
	srv.Close()
	log.Println("Cyrene v2 已安全退出")

	_ = voiceSvc
	_ = memSvc
	_ = orch
}