package storage

import "context"

// NoopBackend is a deterministic no-op archive/storage adapter.
type NoopBackend struct{}

// Archive returns the requested items as archived with placeholder metadata.
func (n *NoopBackend) Archive(ctx context.Context, req ArchiveRequest) (ArchiveResult, error) {
	if err := ctx.Err(); err != nil {
		return ArchiveResult{}, err
	}
	return ArchiveResult{Archived: append([]ArchiveItem(nil), req.Items...), Metadata: map[string]any{"placeholder": true}}, nil
}

// FakeBackend captures archive requests and returns deterministic responses.
type FakeBackend struct {
	Requests []ArchiveRequest
	Err      error
	Result   ArchiveResult
}

// Archive records request and returns configured response.
func (f *FakeBackend) Archive(ctx context.Context, req ArchiveRequest) (ArchiveResult, error) {
	if err := ctx.Err(); err != nil {
		return ArchiveResult{}, err
	}
	f.Requests = append(f.Requests, req)
	if f.Err != nil {
		return ArchiveResult{}, f.Err
	}
	res := f.Result
	if res.Archived == nil {
		res.Archived = append([]ArchiveItem(nil), req.Items...)
	}
	if res.Metadata == nil {
		res.Metadata = map[string]any{"fake": true}
	}
	return res, nil
}