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import type { ActivePageSnapshot, ActivePageState } from "@/client/lib/active-page-model";
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import type { PageAncestor, PageKind, SharePermission } from "@/shared/types";
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export interface ShareRootPage {
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  id: string;
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  kind: PageKind;
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  title: string;
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  icon: string | null;
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  cover_url: string | null;
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  permission: SharePermission;
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}
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export interface SharePagePresentation {
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  activePageId: string;
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  isRootActive: boolean;
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  isPageLoading: boolean;
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  isAncestorTrailLoading: boolean;
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  page: ActivePageSnapshot | null;
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  ancestors: PageAncestor[];
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  displayTitle: string;
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  displayIcon: string | null;
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  displayCoverUrl: string | null;
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  isViewOnly: boolean;
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}
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export function deriveSharePagePresentation(
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  rootPage: ShareRootPage,
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  activePageId: string,
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  activePageState: ActivePageState,
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): SharePagePresentation {
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  const isRootActive = activePageId === rootPage.id;
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  const readyState =
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    activePageState.kind === "ready" && activePageState.snapshot.id === activePageId ? activePageState : null;
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  return {
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    activePageId,
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    isRootActive,
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    isPageLoading: !readyState && activePageState.kind !== "unavailable",
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    isAncestorTrailLoading: readyState?.ancestorsStatus === "loading",
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    page: readyState?.snapshot ?? null,
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    ancestors: readyState?.ancestors ?? [],
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    displayTitle: readyState?.snapshot.title ?? "",
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    displayIcon: readyState?.snapshot.icon ?? null,
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    displayCoverUrl: readyState?.snapshot.coverUrl ?? null,
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    isViewOnly: readyState ? readyState.access.mode === "view" : rootPage.permission === "view",
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  };
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}