package promptkit

import (
	"context"
	"errors"

	artifactadapter "gitea.maximumdirect.net/eric/promptkit/internal/artifact"
	"gitea.maximumdirect.net/eric/promptkit/internal/domain"
)

var errNilArtifactReaderResponse = errors.New("artifact reader returned nil artifact without error")

type publicArtifactReaderAdapter struct {
	reader ArtifactReader
}

var _ artifactadapter.Reader = publicArtifactReaderAdapter{}

func (a publicArtifactReaderAdapter) Read(ctx context.Context, ref domain.ArtifactRef) (*domain.Artifact, error) {
	artifact, err := a.reader.Read(ctx, ArtifactRef{
		Type: ArtifactRefType(ref.Type),
		URI:  ref.URI,
		Body: ref.Body,
	})
	if err != nil {
		return nil, err
	}
	if artifact == nil {
		return nil, errNilArtifactReaderResponse
	}
	return &domain.Artifact{
		Name:        artifact.Name,
		ContentType: artifact.ContentType,
		Body:        copyBytes(artifact.Body),
		URI:         artifact.URI,
		Size:        artifact.Size,
		Hash:        artifact.Hash,
	}, nil
}