/**
 * In-memory history queries — only used when a richer userbot-backed
 * implementation isn't available. Frontends may override these.
 */

import {
  getRecentFormatted,
  getFormattedBefore,
  getFormattedBeforeTime,
  searchHistory,
  getMessagesByUser,
  getKnownUsers,
} from "../../../storage/history.js";
import { formatMediaIndex } from "../../../storage/media-index.js";
import type { SharedActionHandlers } from "./types.js";

export const historyHandlers: SharedActionHandlers = {
  read_history: (body, chatId) => {
    const limit = Math.min(100, Number(body.limit ?? 30));
    const cid = String(chatId);
    // The tool schema advertises `offset_id` and `before` for paging back;
    // this fallback used to ignore both and hand back the same newest
    // window no matter what the model asked, so "go further back" was a
    // silent no-op on frontends without a platform history API (WhatsApp,
    // native).
    const offsetId = Number(body.offset_id);
    if (Number.isFinite(offsetId) && offsetId > 0) {
      return { ok: true, text: getFormattedBefore(cid, offsetId, limit) };
    }
    if (body.before !== undefined) {
      const ts = Date.parse(String(body.before));
      if (Number.isFinite(ts)) {
        return { ok: true, text: getFormattedBeforeTime(cid, ts, limit) };
      }
    }
    return { ok: true, text: getRecentFormatted(cid, limit) };
  },

  search_history: (body, chatId) => {
    const limit = Math.min(100, Number(body.limit ?? 20));
    return {
      ok: true,
      text: searchHistory(String(chatId), String(body.query ?? ""), limit),
    };
  },

  get_user_messages: (body, chatId) => {
    const limit = Math.min(50, Number(body.limit ?? 20));
    return {
      ok: true,
      text: getMessagesByUser(
        String(chatId),
        String(body.user_name ?? ""),
        limit,
      ),
    };
  },

  list_known_users: (body, chatId) => ({
    ok: true,
    text: getKnownUsers(String(chatId)),
  }),

  list_media: (body, chatId) => ({
    ok: true,
    text: formatMediaIndex(
      String(chatId),
      Math.min(20, Number(body.limit ?? 10)),
    ),
  }),
};