// SvxPortal — web front-end for SvxReflector
// Copyright (C) 2026 SA7AUX (Björn)
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify it under
// the terms of the GNU Affero General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option) any
// later version. See the LICENSE file for details.

'use strict';

let __lhInflight = false;

async function refreshLastheard(){
  if (__lhInflight) return;
  __lhInflight = true;
  try {
    const r = await apiFetch('/svxportal/api/lastheard?limit=200');   // lib/api.js
    if(!r.ok || !r.json){
      renderLastheard({events:[], count:0, _err:`http ${r.status}`});
      return;
    }
    const j = r.json;
    renderLastheard(j);
  } catch(e){
    renderLastheard({events:[], count:0, _err:String(e)});
  } finally {
    __lhInflight = false;
  }
}

function renderLastheard(payload){
  const tbody = document.getElementById('lastheardRows');
  const cnt   = document.getElementById('lastheardCount');
  if(!tbody) return;

  const evs = (payload?.events || []).map(e => {
    if (typeof e === 'string'){ try{ return JSON.parse(e); }catch{ return null; } }
    return e;
  }).filter(Boolean);

  if (cnt) cnt.textContent = evs.length ? `${evs.length} event${evs.length===1?'':'s'} / last 24h` :
                                          (payload?._err ? `error: ${payload._err}` : 'no events yet');

  if (evs.length === 0){
    tbody.innerHTML = `<tr><td colspan="8" class="text-secondary">No keyups recorded in last 24h.</td></tr>`;
    return;
  }

  // Network bridge directory (crawled from every reflector): so a bridge that
  // arrives bare over a trunk (hub reflector: node/system empty) renders IDENTICALLY to
  // where it is a local client (bridge box: astmeta filled node/system). Same code,
  // same result on both boxes.
  const bn = (window.__svxportal_lastStatus && window.__svxportal_lastStatus.bridge_nodes) || {};
  const now = Math.floor(Date.now()/1000);
  tbody.innerHTML = evs.map(e => {
    const ts = Number(e.ts || 0);
    const age = now - ts;
    const ageStr = formatAge(age);
    const absTs = new Date(ts*1000).toLocaleString();
    const dur = Number(e.duration_s || 0);
    const durStr = dur >= 60 ? `${Math.floor(dur/60)}m${dur%60}s` : `${dur}s`;
    const sig = (e.siglev !== undefined && e.siglev !== null && e.siglev !== 0)
      ? ` <span class="text-secondary mono">${Number(e.siglev).toFixed(0)}</span>` : '';
    const rx  = e.rx_name ? `${escHtml(e.rx_name)}${sig}` : '<span class="text-secondary">-</span>';
    const bi = bn[String(e.callsign || '').toUpperCase()];
    const eSystem = e.system || (bi && bi.system) || '';
    // Backend = HOW the talker enters (AllStar / SVXLink / trunk / DMR / PBX …),
    // the ingress path — same concept the DMR side calls "Backend" (there "Mode"
    // means the DV protocol, a different fact). Carried in the network field.
    const eBackend = e.network || (bi && bi.network) || '';
    // Callsign column = the callsign field as-is (e.g. the trunk callsign
    // KT4ROY-ASL). The gateway/reflector descriptor ("East Coast Reflector via
    // 45225 / W2ECR") lives in the Location column. Uniform on every box: an
    // AllStar row (bridge box) and the same talker arriving over the trunk (hub)
    // render identically — the backend already fills callsign + location, the
    // web just shows them, it never re-derives the name.
    const csCell = `<b>${escHtml(e.callsign || eSystem || '')}</b>`;
    return `<tr>
      <td class="mono nowrap" title="${escHtml(absTs)}">${ageStr}</td>
      <td class="mono">${csCell}</td>
      <td class="wrap">${escHtml(eBackend)}</td>
      <td class="mono nowrap">${Number(e.tg||0)}</td>
      <td class="wrap">${escHtml(e.location || '')}</td>
      <td class="wrap">${rx}</td>
      <td class="mono nowrap">${durStr}</td>
    </tr>`;
  }).join('');
}

function formatAge(sec){
  if (sec < 0) sec = 0;
  if (sec < 60) return `${sec}s ago`;
  if (sec < 3600) return `${Math.floor(sec/60)}m ago`;
  if (sec < 86400) return `${Math.floor(sec/3600)}h ago`;
  const d = Math.floor(sec/86400);
  return `${d}d ago`;
}

function escHtml(s){
  return String(s).replace(/[&<>"']/g, c => ({
    '&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'
  }[c]));
}

window.refreshLastheard = refreshLastheard;
window.renderLastheard  = renderLastheard;