/**
 * HTTP client for the graph endpoint (R3.5.1 backend).
 *
 * Uses the shared Docmost `api` axios instance (same base "/api" and cookie auth)
 * rather than the bridge client — the graph endpoint lives on the Docmost server.
 */

import api from "@/lib/api-client";

export interface GraphNode {
  id: string;
  label: string | null;
  /** URL slug for /p/:slug navigation — null when the page has no slug yet */
  slug: string | null;
  type: "page";
  spaceId: string;
  spaceName: string | null;
  icon: string | null;
  isOrphan: boolean;
  metrics: {
    inDegree: number;
    outDegree: number;
  };
}

export interface GraphEdge {
  id: string;
  source: string;
  target: string;
  type: "wikilink" | "mention" | "database_embed" | "parent_child";
  weight: number;
}

export interface GraphMeta {
  totalNodes: number;
  totalEdges: number;
  workspaceId: string;
  rootPageId?: string;
  depth?: number;
  truncated: boolean;
}

export interface GraphResponse {
  nodes: GraphNode[];
  edges: GraphEdge[];
  meta: GraphMeta;
}

export interface GraphQueryParams {
  spaceId?: string;
  pageId?: string;
  depth?: number;
  types?: Array<"wikilink" | "mention" | "database_embed">;
  includeOrphans?: boolean;
}

export async function fetchGraph(
  params: GraphQueryParams,
): Promise<GraphResponse> {
  const query: Record<string, string> = {};
  if (params.spaceId) query.spaceId = params.spaceId;
  if (params.pageId) query.pageId = params.pageId;
  if (params.depth !== undefined) query.depth = String(params.depth);
  if (params.types && params.types.length > 0)
    query.types = params.types.join(",");
  if (params.includeOrphans !== undefined)
    query.includeOrphans = String(params.includeOrphans);

  const qs = new URLSearchParams(query).toString();
  const url = qs ? `/v1/graph?${qs}` : "/v1/graph";

  return api.get(url) as unknown as Promise<GraphResponse>;
}