// services/renderers/mppPhoneDiagnosticsRenderer.js
//
// MPP desk phone diagnostics follow-up for /phonestatus (via relay).

import { formatDisplayTime } from '../../utils/time.js';

/**
 * @param {Array} results  probeAll() output
 * @param {object} opts
 * @param {string} opts.storeNum
 * @param {boolean} [opts.verbose=false]  Tier 3 fields
 * @param {boolean} [opts.footer=true]
 * @returns {string}
 */
export function renderMppPhoneDiagnosticsMarkdown(results, opts = {}) {
  const { storeNum, verbose = false, footer = true } = opts;
  const list = Array.isArray(results) ? results : [];
  if (list.length === 0) return '';

  let out = `**MPP Desk Phone Diagnostics — Store ${storeNum}**\n\n`;

  for (const r of list) {
    out += renderOnePhone(r, { verbose });
    out += '\n';
  }

  if (footer) {
    out += `\n*Phone diagnostics pulled at ${formatDisplayTime()} via the DECT relay.*`;
    if (!verbose) {
      out += ' Pass `verbose` or `debug` for extension/debug counters.';
    }
    out += ' Raw capture: `node scripts/probePhone.js raw <store>`';
  }

  return out.trim();
}

function renderOnePhone(r, { verbose }) {
  const label = r.phone?.name || r.phone?.product || `Phone ${r.phone?.mac || '?'}`;
  const ip = r.phone?.ip || r.parsed?.network?.ipv4 || '?';

  if (!r.ok) {
    return `⚠️ **${label}** (${ip}) — probe failed: ${r.error?.message || 'unknown error'}` +
      (r.error?.hint ? `\n   _${r.error.hint}_` : '');
  }

  const mpp = r.mpp || {};
  const parsed = mpp.parsed || r.parsed || {};
  const verdict = mpp.verdict || r.verdict || {};
  const device = parsed.device || {};
  const network = parsed.network || {};
  const phoneStatus = parsed.phoneStatus || {};
  const line1 = parsed.lines?.find((l) => l.index === 1) || parsed.lines?.[0];
  const neighbor = mpp.networkNeighbor || {};
  const download = mpp.download || {};
  const system = mpp.system || {};

  const icon = verdict.healthy ? '✅' : '⚠️';
  const fwShort = shortenFirmware(device.firmware);
  let out = `${icon} **${label}** (${ip})\n`;
  out += `   ${device.product || '?'} · ${device.mac || '?'} · ${fwShort}\n`;

  if (line1?.registrationState) {
    out += `   Ext ${line1.index}: ${line1.registrationState}`;
    if (line1.lastRegistrationIp) out += ` → ${line1.lastRegistrationIp}`;
    if (line1.lastRegistrationAt) out += ` (last ${line1.lastRegistrationAt})`;
    out += '\n';
  }

  const uptime = phoneStatus.elapsedTime || '?';
  const vlan = network.vlan ? `VLAN ${network.vlan}` : null;
  const link = phoneStatus.linkSpeed || neighbor.portSpeed || null;
  const netBits = [uptime !== '?' ? `uptime ${uptime}` : null, vlan, link].filter(Boolean);
  if (netBits.length) out += `   ${netBits.join(' · ')}\n`;

  if (neighbor.switchDevice) {
    const swIp = neighbor.switchIp ? ` (${neighbor.switchIp})` : '';
    out += `   Switch: ${neighbor.switchDevice} ${neighbor.switchPort || ''}${swIp}\n`;
  }

  if (parsed.rebootHistory?.length) {
    out += `   Last reboot: ${formatReboot(parsed.rebootHistory[0])}\n`;
  }

  if (download.latestProvisioning) {
    const prov = download.latestProvisioning;
    const host = prov.url ? hostFromUrl(prov.url) : '?';
    const result = prov.succeeded ? 'OK' : (prov.failed ? 'FAILED' : (prov.result || '?'));
    out += `   Last resync: ${host} · ${result}\n`;
  }

  if (download.latestFirmwareUpgrade) {
    const fw = download.latestFirmwareUpgrade;
    if (fw.succeeded) {
      out += `   Firmware upgrade: OK\n`;
    } else if (fw.failed) {
      out += `   Firmware upgrade: ${fw.result}\n`;
    }
  }

  if (phoneStatus.dot1xStatus) {
    out += `   802.1X: ${phoneStatus.dot1xStatus}${phoneStatus.dot1xProtocol ? ` (${phoneStatus.dot1xProtocol})` : ''}\n`;
  }

  if (phoneStatus.ledLine1Color) {
    out += `   Line 1 LED: ${phoneStatus.ledLine1Color}${phoneStatus.ledLine1Cadence ? ` ${phoneStatus.ledLine1Cadence}` : ''}\n`;
  }

  if (parsed.sip?.messagesSent || parsed.sip?.messagesRecv) {
    out += `   SIP msgs: ${parsed.sip.messagesSent || 0} sent / ${parsed.sip.messagesRecv || 0} recv`;
    if (phoneStatus.sipBytesSent) out += ` (${phoneStatus.sipBytesSent}B / ${phoneStatus.sipBytesRecv || 0}B)`;
    out += '\n';
  }

  if (system.webServer) {
    out += `   Web server: ${system.webServer}`;
    if (system.proxyMode) out += ` · proxy ${system.proxyMode}`;
    out += '\n';
  }

  if (line1?.messageWaiting && line1.messageWaiting !== 'No') {
    out += `   Message waiting: ${line1.messageWaiting}\n`;
  }
  if (line1?.hotelingState && line1.hotelingState !== 'Disabled') {
    out += `   Hoteling: ${line1.hotelingState}\n`;
  }

  if (Array.isArray(verdict.warnings) && verdict.warnings.length > 0) {
    for (const w of verdict.warnings) {
      out += `   ⚠️ ${w}\n`;
    }
  }

  if (verbose) {
    out += renderVerboseTier(r, parsed, neighbor, mpp.probes);
  }

  return out;
}

function renderVerboseTier(r, parsed, neighbor, probes) {
  let out = '';

  const otherLines = (parsed.lines || []).filter((l) => l.index !== 1);
  for (const line of otherLines) {
    out += `   Ext ${line.index}: ${line.registrationState || '?'}\n`;
  }

  const ps = parsed.phoneStatus || {};
  if (ps.ipv6Status || ps.ipv6Address) {
    out += `   IPv6: ${ps.ipv6Status || '?'} ${ps.ipv6Address || ''}\n`.trimEnd() + '\n';
  }
  if (ps.tr069Feature) out += `   TR-069: ${ps.tr069Feature}\n`;
  if (ps.multicastRx != null || ps.multicastTx != null) {
    out += `   Paging multicast: rx ${ps.multicastRx || 0} / tx ${ps.multicastTx || 0}\n`;
  }
  if (ps.streamingRx != null) out += `   XML streaming rx: ${ps.streamingRx}\n`;

  const counters = neighbor.errorCounters || {};
  const counterKeys = Object.keys(counters);
  if (counterKeys.length > 0) {
    out += '   Ethernet errors:\n';
    for (const k of counterKeys.slice(0, 8)) {
      out += `     ${k}: ${counters[k]}\n`;
    }
  }

  const probeList = Array.isArray(probes) ? probes : [];
  if (probeList.length > 0) {
    out += '   Probe paths:\n';
    out += '   ```\n';
    out += '   STATUS BYTES PATH\n';
    for (const p of probeList) {
      const status = p.status == null ? 'ERR' : String(p.status);
      out += `   ${status.padEnd(6)} ${String(p.sizeBytes || 0).padEnd(6)} ${p.path}\n`;
    }
    out += '   ```\n';
  }

  return out;
}

function shortenFirmware(fw) {
  if (!fw || typeof fw !== 'string') return '?';
  const m = fw.match(/(sip78xx[^\s]+)/i);
  return m ? m[1] : (fw.length > 36 ? `${fw.slice(0, 36)}…` : fw);
}

function formatReboot(raw) {
  if (!raw) return '?';
  const m = raw.match(/^(\w+)\(([^)]+)\)/);
  return m ? `${m[1]} ${m[2]}` : raw;
}

function hostFromUrl(url) {
  if (!url || typeof url !== 'string') return '?';
  try {
    const normalized = url.startsWith('http') ? url : `https://${url}`;
    const u = new URL(normalized);
    return u.hostname;
  } catch {
    return url.length > 30 ? `${url.slice(0, 30)}…` : url;
  }
}