//go:build !windows

package windsurf

import (
	"os"
	"os/exec"
	"syscall"
	"time"
)

// attachProcessGroup configures the child to run in its own process group so
// we can signal the entire tree on shutdown. Windows has no Unix-style
// process groups; see lspool_stop_windows.go for the no-op.
func attachProcessGroup(cmd *exec.Cmd) {
	if cmd.SysProcAttr == nil {
		cmd.SysProcAttr = &syscall.SysProcAttr{}
	}
	cmd.SysProcAttr.Setpgid = true
}

// terminateProcess asks the LS process (and its children) to exit
// gracefully, then kills them if they don't exit within 5 seconds.
func terminateProcess(p *os.Process, done <-chan struct{}) {
	pgid, err := syscall.Getpgid(p.Pid)
	if err != nil {
		// Process may have already exited; fall back to signalling
		// the original PID directly.
		pgid = p.Pid
	}
	// Negative pid here means "send to the whole process group" per kill(2).
	_ = syscall.Kill(-pgid, syscall.SIGINT)
	select {
	case <-done:
	case <-time.After(5 * time.Second):
		_ = syscall.Kill(-pgid, syscall.SIGKILL)
		<-done
	}
}