package main

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

	"skyview/internal/config"
	"skyview/internal/server"
)

//go:embed static/*
var staticFiles embed.FS

func main() {
	daemon := flag.Bool("daemon", false, "Run as daemon (background process)")
	flag.Parse()

	cfg, err := config.Load()
	if err != nil {
		log.Fatalf("Failed to load configuration: %v", err)
	}

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	srv := server.New(cfg, staticFiles, ctx)

	log.Printf("Starting skyview server on %s", cfg.Server.Address)
	log.Printf("Connecting to dump1090 SBS-1 at %s:%d", cfg.Dump1090.Host, cfg.Dump1090.DataPort)

	httpServer := &http.Server{
		Addr:    cfg.Server.Address,
		Handler: srv,
	}

	go func() {
		if err := httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("Server failed to start: %v", err)
		}
	}()

	if *daemon {
		log.Printf("Running as daemon...")
		select {}
	} else {
		log.Printf("Press Ctrl+C to stop")
		
		sigChan := make(chan os.Signal, 1)
		signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
		<-sigChan
		
		log.Printf("Shutting down...")
		cancel()
		
		shutdownCtx, shutdownCancel := context.WithTimeout(context.Background(), 5*time.Second)
		defer shutdownCancel()
		
		if err := httpServer.Shutdown(shutdownCtx); err != nil {
			log.Printf("Server shutdown error: %v", err)
		}
	}
}