package main

import (
	"context"
	"embed"
	"io/fs"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/sandrodach/mindsift/internal/api"
	"github.com/sandrodach/mindsift/internal/config"
	"github.com/sandrodach/mindsift/internal/storage"
	"github.com/sandrodach/mindsift/internal/ws"
)

//go:embed all:dist
var embeddedDist embed.FS

func main() {
	cfg := config.Load()

	log.Printf("🧠 Starting MindSift Server on port %s (DB: %s)", cfg.Port, cfg.DatabasePath)

	store, err := storage.NewStore(cfg.DatabasePath)
	if err != nil {
		log.Fatalf("Failed to initialize storage: %v", err)
	}
	defer store.Close()

	// Seed SMTP defaults from environment variables into DB if not yet configured in DB
	store.SeedSMTPDefaultsFromEnv(cfg.SMTPHost, cfg.SMTPPort, cfg.SMTPUser, cfg.SMTPPass, cfg.SMTPFrom, cfg.SMTPTLS)

	if cfg.DemoMode {
		log.Printf("🧪 Demo-Modus aktiv (MINDA_DEMO=true): Richte Demo-Benutzer admin/admin und user/user ein...")
		if err := store.EnsureDemoAccounts(); err != nil {
			log.Printf("⚠️ Fehler beim Anlegen der Demo-Accounts: %v", err)
		} else {
			log.Printf("✅ Demo-Accounts bereit: admin / admin (Admin-Rolle) und user / user (Standard-Rolle)")
		}
	}

	wsHub := ws.NewHub()

	staticFS, err := fs.Sub(embeddedDist, "dist")
	if err != nil {
		log.Fatalf("Failed to mount embedded dist filesystem: %v", err)
	}

	srv := api.NewServer(cfg, store, wsHub, staticFS)

	httpServer := &http.Server{
		Addr:         ":" + cfg.Port,
		Handler:      srv.Router(),
		ReadTimeout:  15 * time.Second,
		WriteTimeout: 30 * time.Second,
		IdleTimeout:  60 * time.Second,
	}

	go func() {
		log.Printf("✨ MindSift ready at http://0.0.0.0:%s", cfg.Port)
		if err := httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("HTTP server error: %v", err)
		}
	}()

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

	log.Println("Shutting down MindSift server gracefully...")
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	_ = httpServer.Shutdown(ctx)
}