package validators

import (
	"fmt"
	"os/exec"
)

// CheckBridge returns nil if the bridge exists on the host.
func CheckBridge(name string) error {
	if name == "" {
		return fmt.Errorf("bridge name required")
	}
	if err := exec.Command("bash", "-lc", fmt.Sprintf("ip link show %s", name)).Run(); err != nil {
		return fmt.Errorf("bridge %s not found", name)
	}
	return nil
}

// CheckBridgeSet validates all bridges in NIC specs.
func CheckBridgeSet(nics []libvirt.NICSpec) error {
	for _, nic := range nics {
		if err := CheckBridge(nic.Bridge); err != nil {
			return err
		}
	}
	return nil
}

// CheckBridgeSetCT validates bridges for LXC NICs.
func CheckBridgeSetCT(nics []lxc.NICSpec) error {
	for _, nic := range nics {
		if err := CheckBridge(nic.Bridge); err != nil {
			return err
		}
	}
	return nil
}

// CheckStoragePool is a stub; implement LVM/ZFS/dir verification as needed.
func CheckStoragePool(name string) error {
	if name == "" {
		return fmt.Errorf("storage pool name required")
	}
	// TODO: query configured pools
	return nil
}