// SPDX-License-Identifier: MIT

package checker

import (
	"context"
	"encoding/json"
	"errors"

	sdk "git.happydns.org/checker-sdk-go/checker"
)

// stubObs is a minimal ObservationGetter for rule tests. It JSON round-trips
// the stored value into the destination so it exercises the same code path
// rules see in production.
type stubObs struct {
	value any
	err   error
}

func (s stubObs) Get(_ context.Context, _ sdk.ObservationKey, dest any) error {
	if s.err != nil {
		return s.err
	}
	if s.value == nil {
		return errors.New("no value")
	}
	raw, err := json.Marshal(s.value)
	if err != nil {
		return err
	}
	return json.Unmarshal(raw, dest)
}

func (s stubObs) GetRelated(_ context.Context, _ sdk.ObservationKey) ([]sdk.RelatedObservation, error) {
	return nil, nil
}