package main

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

	"warpbox.dev/backend/libs/config"
	"warpbox.dev/backend/libs/httpserver"
)

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

	cfg, err := config.Load()
	if err != nil {
		logger.Error("failed to load config", "error", err)
		os.Exit(1)
	}

	server, err := httpserver.New(cfg, logger)
	if err != nil {
		logger.Error("failed to create server", "error", err)
		os.Exit(1)
	}

	errs := make(chan error, 1)
	go func() {
		logger.Info("warpbox server starting", "addr", cfg.Addr, "env", cfg.Environment)
		errs <- server.ListenAndServe()
	}()

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

	select {
	case err := <-errs:
		if err != nil && !errors.Is(err, http.ErrServerClosed) {
			logger.Error("server stopped unexpectedly", "error", err)
			os.Exit(1)
		}
	case sig := <-shutdown:
		logger.Info("shutdown signal received", "signal", sig.String())
		ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
		defer cancel()

		if err := server.Shutdown(ctx); err != nil {
			logger.Error("graceful shutdown failed", "error", err)
			os.Exit(1)
		}
		logger.Info("server stopped")
	}
}