//go:build !windows

package cli

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

	"golang.org/x/term"

	"pxmon/internal/cluster"
)

func installWinchHandler(fd int, resize chan<- cluster.InteractiveShellSize) chan os.Signal {
	sigCh := make(chan os.Signal, 4)
	signal.Notify(sigCh, syscall.SIGWINCH)
	go func() {
		for range sigCh {
			w, h, err := term.GetSize(fd)
			if err != nil || w <= 0 || h <= 0 {
				continue
			}
			select {
			case resize <- cluster.InteractiveShellSize{Width: w, Height: h}:
			default:
			}
		}
	}()
	return sigCh
}

func closeWinchHandler(sigCh chan os.Signal, resize chan cluster.InteractiveShellSize) {
	if sigCh != nil {
		signal.Stop(sigCh)
		close(sigCh)
	}
	if resize != nil {
		close(resize)
	}
}