import { useLayoutEffect, type Dispatch, type SetStateAction } from "react";

import { reconcileManualRepositoriesWithCatalog, type RepoDraft } from "./session-tools";
import type { GitHubRepository, PersonalGitHubRepositoryCatalogItem } from "../types";

/**
 * A restored draft can hold a manual row for a workspace repository: its
 * GitHub identity retained while the catalog was unknown, or a bare URL for the
 * same remote. Once the catalog is known, fold that row into the catalog
 * selection so the picker shows the repository checked and it is attached
 * exactly once. See reconcileManualRepositoriesWithCatalog for the rules.
 *
 * The fold writes plain values computed from one committed render, so it runs
 * as a layout effect inside that commit. A passive effect would run only when
 * the next render starts, after a picker toggle, workspace reset or draft
 * hydration may already have queued its own update, and the older values would
 * then overwrite that update.
 */
export function useManualRepositoryCatalogReconciliation(input: {
  manualRepos: RepoDraft[];
  selectedRepoIds: Set<number>;
  selectedRepoRefs: Record<number, string>;
  repositories: GitHubRepository[];
  catalogReady: boolean;
  /** The personal GitHub selection; a repository selected there keeps that authority. */
  personalRepositories: PersonalGitHubRepositoryCatalogItem[];
  selectedPersonalRepoIds: Set<string>;
  selectedPersonalRepoRefs: Record<string, string>;
  setManualRepos: Dispatch<SetStateAction<RepoDraft[]>>;
  setSelectedRepoIds: Dispatch<SetStateAction<Set<number>>>;
  setSelectedRepoRefs: Dispatch<SetStateAction<Record<number, string>>>;
}): void {
  const {
    manualRepos,
    selectedRepoIds,
    selectedRepoRefs,
    repositories,
    catalogReady,
    personalRepositories,
    selectedPersonalRepoIds,
    selectedPersonalRepoRefs,
    setManualRepos,
    setSelectedRepoIds,
    setSelectedRepoRefs,
  } = input;
  useLayoutEffect(() => {
    const reconciled = reconcileManualRepositoriesWithCatalog(
      { manualRepos, selectedRepoIds, selectedRepoRefs },
      repositories,
      catalogReady,
      {
        repositories: personalRepositories,
        selectedRepoIds: selectedPersonalRepoIds,
        selectedRepoRefs: selectedPersonalRepoRefs,
      },
    );
    if (!reconciled) return;
    setManualRepos(reconciled.manualRepos);
    setSelectedRepoIds(reconciled.selectedRepoIds);
    setSelectedRepoRefs(reconciled.selectedRepoRefs);
  }, [
    catalogReady,
    manualRepos,
    personalRepositories,
    repositories,
    selectedPersonalRepoIds,
    selectedPersonalRepoRefs,
    selectedRepoIds,
    selectedRepoRefs,
    setManualRepos,
    setSelectedRepoIds,
    setSelectedRepoRefs,
  ]);
}