package exegroup

import (
	"context"
	"fmt"
	"os"
	"os/signal"
	"syscall"

	"git.blauwelle.com/go/crate/log"
)

// HandleSignal 提供信号处理函数;
func HandleSignal(signals ...os.Signal) func(ctx context.Context) error {
	c := make(chan os.Signal, 1)
	if len(signals) == 0 {
		signals = []os.Signal{syscall.SIGTERM, syscall.SIGINT}
	}
	signal.Notify(c, signals...)
	return func(ctx context.Context) error {
		log.Tracef(ctx, "notify signal %v", signals)
		defer signal.Stop(c)
		select {
		case sig := <-c:
			err := fmt.Errorf("signal received: %s", sig)
			log.Trace(ctx, err.Error())
			return err
		case <-ctx.Done():
			return ctx.Err()
		}
	}
}