//go:build !windows

package server

import (
	"os"
	"os/signal"
	"syscall"

	"github.com/eleksir/pekoe/internal/logger"
)

// signalSetup configures signal handlers for Unix systems.
// Returns a channel that receives incoming signals.
func signalSetup() chan os.Signal {
	sigCh := make(chan os.Signal, 1)
	signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGUSR1)
	return sigCh
}

// handleSignal processes a received signal and returns true if the server should shutdown.
func (s *Server) handleSignal(sig os.Signal) bool {
	switch sig {
	case syscall.SIGUSR1:
		// Reopen log files for log rotation
		if err := logger.Reopen(); err != nil {
			logger.Error("event=log_reopen_error error=%v", err)
		} else {
			logger.Info("event=log_reopened")
		}
		return false // Continue listening

	case syscall.SIGINT, syscall.SIGTERM:
		// Graceful shutdown
		logger.Info("event=shutdown signal=%v", sig)
		return true // Shutdown

	case syscall.SIGHUP:
		// Reserved for future config reload functionality
		logger.Info("event=sighup_ignored message=reload not implemented")
		return false // Continue listening

	default:
		return false
	}
}