import {
  getBoard,
  type IssueQuery,
  listIssues,
  listLabels,
  listMilestones,
  listSpaceMembers,
} from '@app/domains/issues/model'
import { boardKey, prefetch, spaceMembersPageKey } from '@app/lib'
import { ISSUE_PAGE_SIZE } from './use-board-data'

/**
 * The query a board mounts with (board-location defaults: state `open`, sort
 * `created`, page 1). Field order matters — `useBoardData` derives its cache
 * key from `JSON.stringify(query)`, so this literal must produce the exact
 * same string as the board view's.
 */
const DEFAULT_QUERY: IssueQuery = {
  state: 'open',
  q: undefined,
  priorities: undefined,
  labelIds: undefined,
  milestoneIds: undefined,
  assigneeIds: undefined,
  sort: 'created',
  limit: ISSUE_PAGE_SIZE,
  offset: 0,
}

/** Hover prefetch for the board column: everything `useBoardData` loads. */
export function prefetchBoardView(space: string, board: string): void {
  if (!space || !board) return
  const ref = { space, board }
  void prefetch(boardKey(space, board, 'board'), () => getBoard(ref))
  void prefetch(boardKey(space, board, 'labels'), () => listLabels(ref))
  void prefetch(boardKey(space, board, 'milestones'), () => listMilestones(ref))
  void prefetch(boardKey(space, board, `issues:${JSON.stringify(DEFAULT_QUERY)}`), () => listIssues(ref, DEFAULT_QUERY))
  void prefetch(spaceMembersPageKey(space), () => listSpaceMembers(space))
}