// tg-core.js - Telegram API helpers
const config = require("./config");

const API = config.TG_TOKEN ? "https://api.telegram.org/bot" + config.TG_TOKEN : "";

async function tg(method, body) {
  const res = await fetch(API + "/" + method, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(body),
  });
  return res.json();
}

function allowed(chatId) {
  if (config.ALLOWED_IDS.length === 0) return true;
  return config.ALLOWED_IDS.includes(chatId);
}

async function sendMessage(chatId, text, opts) {
  const safeText = String(text || "");
  try {
    return await tg("sendMessage", Object.assign(
      { chat_id: chatId, text: safeText, parse_mode: "HTML", disable_web_page_preview: true },
      opts || {}
    ));
  } catch (e) {
    if (e.message && (e.message.includes("parse") || e.message.includes("HTML"))) {
      return await tg("sendMessage", Object.assign(
        { chat_id: chatId, text: safeText },
        opts || {}
      ));
    }
    throw e;
  }
}

async function handleCallback(chatId, queryId, data, handlers) {
  if (!data) return;
  const parts = data.split("_");
  const cmd = parts[0];
  const page = parseInt(parts[1]) || 1;

  if (cmd === "list" && handlers.list) {
    await handlers.list(chatId, String(page));
  } else if (cmd === "links" && handlers.links) {
    await handlers.links(chatId, String(page));
  } else if (cmd === "feeds" && handlers.feeds) {
    await handlers.feeds(chatId, String(page));
  }
  try { await tg("answerCallbackQuery", { callback_query_id: queryId }); } catch {}
}

module.exports = { tg, allowed, sendMessage, handleCallback };