export const ARTIFACT_EVENT_TYPE = "stream.thought.artifact";
export const ARTIFACT_REQUEST_EVENT_TYPE = "stream.thought.artifact.requested";
export const ARTIFACT_SCHEMA_VERSION = 1;
export const ARTIFACT_REQUEST_SCHEMA_VERSION = 1;

export const ARTIFACT_KINDS = ["skill", "spec", "report", "design", "code", "document", "image"] as const;
export type ArtifactKind = (typeof ARTIFACT_KINDS)[number];

export const ARTIFACT_MEDIA_TYPES = [
  "text/markdown",
  "text/plain",
  "application/json",
  "application/yaml",
  "text/yaml",
  "image/png",
  "image/jpeg",
] as const;
export type ArtifactMediaType = (typeof ARTIFACT_MEDIA_TYPES)[number];

export const ARTIFACT_VISIBILITY = ["private", "sensitive"] as const;
export type ArtifactVisibility = (typeof ARTIFACT_VISIBILITY)[number];
export const ARTIFACT_REQUEST_STATUSES = ["pending", "failed", "denied"] as const;
export type ArtifactRequestStatus = (typeof ARTIFACT_REQUEST_STATUSES)[number];

export const ARTIFACT_MAX_TEXT_BYTES = 256 * 1024;
export const ARTIFACT_MAX_IMAGE_BYTES = 8 * 1024 * 1024;
export const ARTIFACT_MAX_BODY_BYTES = ARTIFACT_MAX_TEXT_BYTES;
export const ARTIFACT_MAX_TITLE_LENGTH = 500;
export const ARTIFACT_MAX_SUMMARY_LENGTH = 2_000;

export interface ArtifactProvenance { source: string; label: string }
export interface ArtifactRelation { type: string; eventId: string }
export interface ArtifactBlobReference {
  algorithm: "sha256";
  sha256: string;
  relativePath: string;
  byteCount: number;
}

export interface ArtifactPayload {
  artifactId: string;
  artifactVersion: number;
  kind: ArtifactKind;
  title: string;
  summary: string;
  mediaType: ArtifactMediaType;
  blob: ArtifactBlobReference;
  provenance: ArtifactProvenance;
  relations: ArtifactRelation[];
  visibility: ArtifactVisibility;
  publicationEligible: false;
  supersedesArtifactEventId?: string;
}

export interface ArtifactRequestPayload {
  requestId: string;
  workspaceLeaseId: string;
  workspaceRootLabel: string;
  relativeFilePath: string;
  artifactId: string;
  artifactVersion: number;
  kind: ArtifactKind;
  title: string;
  summary: string;
  mediaType: ArtifactMediaType;
  provenance: ArtifactProvenance;
  visibility: ArtifactVisibility;
  publicationEligible: false;
  publicationAuthority: false;
  status: ArtifactRequestStatus;
  reasonCode?: string;
  requestingAgentId?: string;
  requestingRunId?: string;
  sourceEventId?: string;
  supersedesArtifactEventId?: string;
}