package main

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

	"github.com/ruby-sea-battle/game-server/internal/config"
	"github.com/ruby-sea-battle/game-server/internal/game"
	"github.com/ruby-sea-battle/game-server/internal/ws"

	_ "github.com/joho/godotenv/autoload"
)

func main() {
	log := slog.New(slog.NewTextHandler(os.Stdout, nil))

	cfg, err := config.Load()
	if err != nil {
		log.Error("configuration error", "err", err)
		os.Exit(1)
	}

	manager := game.NewManager(cfg.JoinTimeout)
	handler := ws.NewHandler(manager, cfg.JWTSecret, cfg.PublicAddr, cfg.AllowedOrigins, log)

	mux := http.NewServeMux()
	mux.Handle("/ws", handler)
	mux.HandleFunc("/healthz", func(w http.ResponseWriter, _ *http.Request) {
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte("ok"))
	})

	srv := &http.Server{
		Addr:              cfg.ListenAddr,
		Handler:           mux,
		ReadHeaderTimeout: 10 * time.Second,
	}

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

	go func() {
		log.Info("game server listening",
			"listen_addr", cfg.ListenAddr,
			"public_addr", cfg.PublicAddr,
			"join_timeout", cfg.JoinTimeout,
		)
		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
			log.Error("server failed", "err", err)
			os.Exit(1)
		}
	}()

	<-ctx.Done()
	log.Info("shutting down")
	manager.Shutdown()
	shutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	_ = srv.Shutdown(shutdownCtx)
}