import { defineTool } from "eve/tools";
import { z } from "zod";
import { blogApiUrl, authHeaders } from "../lib/blog-client.js";

export default defineTool({
  description:
    "Recall the most relevant saved memories for a query using Cosmos DB vector (semantic) search. Use before answering when past context might help.",
  inputSchema: z.object({
    query: z.string().min(1).describe("What to search your memory for."),
    sessionId: z
      .string()
      .optional()
      .describe("Limit recall to one memory group; omit to search all."),
    k: z
      .number()
      .int()
      .min(1)
      .max(20)
      .default(5)
      .describe("How many memories to return."),
  }),
  async execute({ query, sessionId, k }) {
    const url = new URL(blogApiUrl("/api/memory"));
    url.searchParams.set("q", query);
    url.searchParams.set("k", String(k));
    if (sessionId) url.searchParams.set("sessionId", sessionId);

    const res = await fetch(url, { headers: authHeaders() });
    if (!res.ok) {
      return { ok: false, error: `Recall failed (${res.status})` };
    }
    const { results } = await res.json();
    return { ok: true, memories: results };
  },
});