package main

import (
	"context"
	"embed"
	"io/fs"
	"log/slog"
	"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()

	level := cfg.SlogLevel()
	logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: level}))
	slog.SetDefault(logger)

	slog.Info("MindSift Server starting", "port", cfg.Port, "log_level", level.String())

	store, err := storage.NewStore(cfg.DatabasePath)
	if err != nil {
		slog.Error("Failed to initialize storage", "error", err)
		os.Exit(1)
	}
	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 {
		slog.Info("🧪 Demo-Modus aktiv (MINDA_DEMO=true): Richte Demo-Benutzer admin/admin und user/user ein...")
		if err := store.EnsureDemoAccounts(); err != nil {
			slog.Warn("⚠️ Fehler beim Anlegen der Demo-Accounts", "error", err)
		} else {
			slog.Info("✅ Demo-Accounts bereit: admin / admin (Admin-Rolle) und user / user (Standard-Rolle)")
		}
	}

	wsHub := ws.NewHub()

	staticFS, err := fs.Sub(embeddedDist, "dist")
	if err != nil {
		slog.Error("Failed to mount embedded dist filesystem", "error", err)
		os.Exit(1)
	}

	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() {
		slog.Info("✨ MindSift ready", "url", "http://0.0.0.0:"+cfg.Port)
		if err := httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			slog.Error("HTTP server error", "error", err)
			os.Exit(1)
		}
	}()

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

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