//go:build !windows

package netcfg

import (
	"errors"
	"fmt"

	"gitea.apointless.space/bsncubed/ipswap/internal/preset"
)

// ErrElevationRequired keeps the non-Windows build type-compatible so the rest
// of the tree compiles and `go vet ./...` is useful during development on
// Linux. Nothing here touches a real adapter.
var ErrElevationRequired = errors.New("this operation requires an elevated process")

// ErrUnsupported is returned by every write path off Windows.
var ErrUnsupported = errors.New("adapter configuration is only supported on Windows")

// Stub is a Manager that reports a plausible fixture instead of touching the
// host. It exists so the tray, the editor server and the confirmation text can
// be exercised on the development machine.
type Stub struct{}

// New returns the platform Manager.
func New() Manager { return Stub{} }

func (Stub) Adapters() ([]Adapter, error) {
	return []Adapter{
		{Name: "Ethernet", Description: "Stub adapter (non-Windows build)", Up: true},
		{Name: "Wi-Fi", Description: "Stub adapter (non-Windows build)", Up: false},
	}, nil
}

func (Stub) Current(adapter string) (LiveConfig, error) {
	return LiveConfig{
		Adapter:     adapter,
		DHCP:        true,
		Addresses:   []preset.Address{{Address: "192.168.1.87", Prefix: 24}},
		Gateways:    []string{"192.168.1.1"},
		DNS:         []string{"192.168.1.1"},
		DNSFromDHCP: true,
	}, nil
}

func (Stub) Apply(plan []Command) error {
	return fmt.Errorf("%w (plan had %d commands)", ErrUnsupported, len(plan))
}