package main

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

	"go-htmx-chat/internal/chat"
	"go-htmx-chat/internal/store"
	"go-htmx-chat/internal/web"
)

func main() {
	addr := flag.String("addr", ":8080", "HTTP listen address")
	dbPath := flag.String("db", "data/chat.json", "JSON data file path")
	flag.Parse()

	logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: slog.LevelInfo}))

	st, err := store.Open(*dbPath)
	if err != nil {
		logger.Error("open store", "error", err)
		os.Exit(1)
	}
	defer st.Close()

	authCfg, err := web.AuthConfigFromEnv(logger)
	if err != nil {
		logger.Error("auth config", "error", err)
		os.Exit(1)
	}

	srv, err := web.NewServer(st, chat.NewHub(), logger, authCfg)
	if err != nil {
		logger.Error("new server", "error", err)
		os.Exit(1)
	}

	httpServer := &http.Server{
		Addr:              *addr,
		Handler:           srv.Routes(),
		ReadHeaderTimeout: 5 * time.Second,
	}

	go func() {
		logger.Info("listening", "addr", *addr)
		if err := httpServer.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
			logger.Error("listen", "error", err)
			os.Exit(1)
		}
	}()

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

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	_ = httpServer.Shutdown(ctx)
	logger.Info("server stopped")
}