/** obsidian_rag_status tool implementation. */

import type { ObsidianRagConfig } from "../utils/config.js";
import type { ResponseEnvelope } from "../utils/types.js";
import { makeEnvelope } from "../utils/response.js";
import { readSyncResult } from "../services/indexer-bridge.js";

export async function statusTool(
  config: ObsidianRagConfig,
): Promise<ResponseEnvelope<{
  plugin_health: string;
  total_docs: number;
  total_chunks: number;
  last_sync: string | null;
  unindexed_files: number;
  ollama_status: string;
  active_job: null;
}>> {
  const sync = readSyncResult(config);
  const ollamaUp = await checkOllama(config);

  return makeEnvelope(
    sync ? "healthy" : "unavailable",
    {
      plugin_health: sync ? "healthy" : "unavailable",
      total_docs: sync?.indexed_files ?? 0,
      total_chunks: sync?.total_chunks ?? 0,
      last_sync: sync?.timestamp ?? null,
      unindexed_files: 0,
      ollama_status: ollamaUp ? "up" : "down",
      active_job: null,
    },
    null,
  );
}

async function checkOllama(config: ObsidianRagConfig): Promise<boolean> {
  try {
    const res = await fetch(`${config.embedding.base_url}/api/tags`, { signal: AbortSignal.timeout(3000) });
    return res.ok;
  } catch {
    return false;
  }
}