package main

import (
	"context"
	"errors"
	"log/slog"
	"net/http"
	"os"
	"os/signal"
	"subalineado/server/internal/httpapi"
	"syscall"
	"time"
)

func main() {
	if err := run(); err != nil {
		slog.Error("server stopped", "error", err)
		os.Exit(1)
	}
}

func run() error {
	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
	defer stop()
	addr := os.Getenv("HTTP_ADDR")
	if addr == "" {
		addr = ":8080"
	}
	server := &http.Server{
		Addr: addr, Handler: httpapi.NewRouter(),
		ReadHeaderTimeout: 5 * time.Second, ReadTimeout: 10 * time.Second,
		WriteTimeout: 15 * time.Second, IdleTimeout: 60 * time.Second,
	}
	failures := make(chan error, 1)
	go func() {
		slog.Info("API listening", "address", addr)
		failures <- server.ListenAndServe()
	}()
	select {
	case err := <-failures:
		if errors.Is(err, http.ErrServerClosed) {
			return nil
		}
		return err
	case <-ctx.Done():
		shutdownCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
		defer cancel()
		return server.Shutdown(shutdownCtx)
	}
}