package main

import (
	"context"
	"log/slog"
	"os"
	"os/signal"
	"syscall"

	"sdns/internal/server"
)

func main() {
	logger := slog.New(slog.NewJSONHandler(os.Stderr, &slog.HandlerOptions{
		Level: slog.LevelInfo,
	}))
	slog.SetDefault(logger)

	udp := os.Getenv("SDNS_LISTEN_UDP")
	if udp == "" {
		udp = ":5353"
	}

	tcp := os.Getenv("SDNS_LISTEN_TCP")
	if tcp == "" {
		tcp = ":5353"
	}

	doh := os.Getenv("SDNS_LISTEN_DOH")
	if doh == "" {
		doh = ":8443"
	}

	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
	defer stop()

	srv, err := server.New(udp, tcp, doh, logger)
	if err != nil {
		logger.Error("create server failed", "err", err)
		os.Exit(1)
	}
	defer srv.Close()

	logger.Info("sdns starting", "udp", udp, "tcp", tcp, "doh", doh)

	if err := srv.Run(ctx); err != nil && err != context.Canceled {
		logger.Error("server stopped with error", "err", err)
		os.Exit(1)
	}
	logger.Info("sdns stopped cleanly")
}