package app

import (
	"fmt"
	"strings"
	"time"
)

func appMarksClear(target string) error {
	target = strings.ToLower(strings.TrimSpace(target))
	if target != "vpn" && target != "direct" {
		return fmt.Errorf("invalid target")
	}

	appMarksMu.Lock()
	defer appMarksMu.Unlock()

	st := loadAppMarksState()
	changed := pruneExpiredAppMarksLocked(&st, time.Now().UTC())

	kept := st.Items[:0]
	for _, it := range st.Items {
		if strings.ToLower(strings.TrimSpace(it.Target)) == target {
			_ = nftDeleteAppMarkRule(target, it.ID)
			changed = true
			continue
		}
		kept = append(kept, it)
	}
	st.Items = kept

	if changed {
		return saveAppMarksState(st)
	}
	return nil
}