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import { useMemo } from "react";
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import { useParams } from "@tanstack/react-router";
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import { hasWorkspaceIdentity } from "@/client/lib/workspace-route-model";
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import {
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  usePageById,
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  useWorkspaceAccessMode,
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  useWorkspaceHead,
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  useWorkspaceMembers,
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  useWorkspacePages,
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  useWorkspaceRole,
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  type WorkspaceAccessMode,
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} from "@/client/stores/workspace-replica";
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import { useWorkspaceView } from "./use-workspace-view";
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import type { Page, Workspace, WorkspaceMember, WorkspaceRole } from "@/shared/types";
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export interface CanonicalPageContextValue {
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  workspaceId: string | null;
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  currentPageMeta: Page | null;
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  workspace: Workspace | null;
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  pages: Page[];
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  members: WorkspaceMember[];
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  accessMode: WorkspaceAccessMode | null;
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  workspaceRole: WorkspaceRole | null;
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}
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/**
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 * Derive canonical page inputs from the current workspace route and replica
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 * store. Layout and page-level consumers can call this directly without a
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 * layout-owned context provider.
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 */
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export function useCanonicalPageContext(): CanonicalPageContextValue {
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  const { route } = useWorkspaceView();
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  const params = useParams({ strict: false }) as { pageId?: string };
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  const workspaceId = hasWorkspaceIdentity(route) ? route.workspaceId : null;
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  const workspace = useWorkspaceHead(workspaceId);
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  const replicaAccessMode = useWorkspaceAccessMode(workspaceId);
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  const workspaceRole = useWorkspaceRole(workspaceId);
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  const pages = useWorkspacePages(workspaceId);
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  const members = useWorkspaceMembers(workspaceId);
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  const currentPageMeta = usePageById(params.pageId ?? null);
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  const accessMode = route.phase === "ready" ? route.accessMode : replicaAccessMode;
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  return useMemo(
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    () => ({
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      workspaceId,
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      currentPageMeta,
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      workspace,
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      pages,
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      members,
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      accessMode,
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      workspaceRole,
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    }),
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    [accessMode, workspaceRole, currentPageMeta, pages, members, workspaceId, workspace],
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  );
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}