import type { ToolPart } from '../components/tool';
import type { AttachmentData } from '../components/attachments';

/** The five built-in action buttons (each carries its own curated icon + label). */
export type ChatMessageAction = 'copy' | 'like' | 'dislike' | 'regenerate' | 'edit';

/** A host-defined action button. `icon` is a curated registry name (see
 *  `src/ui/action-icons.ts`); unknown/absent icons render label-only. */
export interface CustomAction {
  /** Emitted as the `kc-message-action` detail `action` when clicked. */
  id: string;
  /** Visible/`aria-label` text. */
  label: string;
  /** A curated icon name from the action-icon registry. */
  icon?: string;
  /** Tooltip text shown on hover. Defaults to `label` when omitted. */
  tooltip?: string;
}

/** The speaker avatar for a message row. (Mirrors the `…Data` convention of
 *  `AttachmentData`; named to avoid clashing with the `MessageAvatar` component.) */
export interface AvatarData {
  /** Image URL. When present, renders an `<img>`. */
  src?: string;
  /** Initials/short text shown when there is no `src`. */
  fallback?: string;
  /** Alt text for the image. */
  alt?: string;
}

export interface ChatMessage {
  id: string;
  role: 'user' | 'assistant';
  content: string;
  reasoning?: { text: string; label?: string };
  tools?: ToolPart[];
  attachments?: AttachmentData[];
  /** Action buttons under the message — built-in names and/or custom descriptors. */
  actions?: (ChatMessageAction | CustomAction)[];
  /** Optional speaker avatar shown to the left of the message column. */
  avatar?: AvatarData;
}