package main

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

	"kubeviz/internal/config"
	"kubeviz/internal/httpserver"
)

func main() {
	cfg := config.Load()
	srv, err := httpserver.New(cfg)
	if err != nil {
		log.Fatalf("failed to initialize server: %v", err)
	}

	httpSrv := &http.Server{
		Addr:         cfg.Addr,
		Handler:      srv.Handler(),
		ReadTimeout:  20 * time.Second,
		WriteTimeout: 20 * time.Second,
		IdleTimeout:  60 * time.Second,
	}

	go func() {
		log.Printf("kubeviz server listening on %s", cfg.Addr)
		if err := httpSrv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("server failure: %v", err)
		}
	}()

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

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	srv.Shutdown(ctx)
	if err := httpSrv.Shutdown(ctx); err != nil {
		log.Printf("graceful shutdown failed: %v", err)
	}
}