// services/renderers/mppPhoneDiagnosticsRenderer.js
//
// MPP desk phone diagnostics for /phonediag (via relay).

import { formatDisplayTime } from '../../utils/time.js';
import {
  shortenFirmware,
  formatHeaderStatusLine,
  headerIconForLine,
  isLineRegistered,
  formatRebootEntry,
  formatProvisioningResync,
  formatFirmwareUpgrade,
  collectIssues,
} from './mppPhoneFormatters.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 device = parsed.device || {};
  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 issues = collectIssues(mpp, parsed);

  let out = renderPhoneHeader({ label, ip, device, phoneStatus, neighbor, line1 });
  out += renderRegistrationSection(line1, phoneStatus);
  out += renderSwitchSection(neighbor);
  out += renderProvisioningSection(parsed, download);
  out += renderIssuesSection(issues);

  if (verbose) {
    out += renderVerboseTier(r, parsed, neighbor, mpp.probes, line1);
  }

  return out;
}

function renderPhoneHeader({ label, ip, device, phoneStatus, neighbor, line1 }) {
  const icon = headerIconForLine(line1);
  const fwShort = shortenFirmware(device.firmware);
  let out = `${icon} **${label}** · \`${ip}\`\n`;
  out += `_${device.product || '?'} · ${device.mac || '?'} · ${fwShort}_\n`;
  const statusLine = formatHeaderStatusLine(phoneStatus, neighbor);
  if (statusLine) out += `_${statusLine}_\n`;
  return `${out}\n`;
}

function renderRegistrationSection(line1, phoneStatus) {
  const bullets = [];
  if (line1?.registrationState) {
    let reg = `Ext ${line1.index}: ${line1.registrationState}`;
    if (line1.lastRegistrationIp) reg += ` → ${line1.lastRegistrationIp}`;
    if (line1.lastRegistrationAt) reg += ` (last ${line1.lastRegistrationAt})`;
    bullets.push(reg);
  }

  if (line1 && !isLineRegistered(line1) && phoneStatus.ledLine1Color) {
    const led = `${phoneStatus.ledLine1Color}${phoneStatus.ledLine1Cadence ? ` ${phoneStatus.ledLine1Cadence}` : ''}`;
    bullets.push(`Line 1 LED: ${led}`);
  }

  if (line1?.messageWaiting && line1.messageWaiting !== 'No') {
    bullets.push(`Message waiting: ${line1.messageWaiting}`);
  }
  if (line1?.hotelingState && line1.hotelingState !== 'Disabled') {
    bullets.push(`Hoteling: ${line1.hotelingState}`);
  }

  if (bullets.length === 0) return '';
  return `**Registration**\n${bullets.map((b) => `• ${b}`).join('\n')}\n\n`;
}

function renderSwitchSection(neighbor) {
  if (!neighbor?.switchDevice) return '';
  const swIp = neighbor.switchIp ? ` · \`${neighbor.switchIp}\`` : '';
  const port = neighbor.switchPort || '';
  return `**Switch**\n• ${neighbor.switchDevice} · ${port}${swIp}\n\n`;
}

function renderProvisioningSection(parsed, download) {
  const bullets = [];
  if (parsed.rebootHistory?.length) {
    const reboot = formatRebootEntry(parsed.rebootHistory[0]);
    if (reboot) bullets.push(`Last reboot: ${reboot}`);
  }
  const resync = formatProvisioningResync(download.latestProvisioning);
  if (resync) bullets.push(resync);
  const fw = formatFirmwareUpgrade(download.latestFirmwareUpgrade);
  if (fw) bullets.push(fw);

  if (bullets.length === 0) return '';
  return `**Provisioning**\n${bullets.map((b) => `• ${b}`).join('\n')}\n\n`;
}

function renderIssuesSection(issues) {
  if (!Array.isArray(issues) || issues.length === 0) return '';
  return `**Issues**\n${issues.map((i) => `• ${i}`).join('\n')}\n\n`;
}

function renderVerboseTier(r, parsed, neighbor, probes, line1) {
  let out = '';

  const otherLines = (parsed.lines || []).filter((l) => l.index !== 1);
  if (otherLines.length > 0) {
    out += '**Extensions**\n';
    for (const line of otherLines) {
      out += `• Ext ${line.index}: ${line.registrationState || '?'}\n`;
    }
    out += '\n';
  }

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

  if (isLineRegistered(line1) && line1 && parsed.phoneStatus?.ledLine1Color) {
    const ps = parsed.phoneStatus;
    const led = `${ps.ledLine1Color}${ps.ledLine1Cadence ? ` ${ps.ledLine1Cadence}` : ''}`;
    out += `**LED**\n• Line 1: ${led}\n\n`;
  }

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

  const probeList = Array.isArray(probes) ? probes : [];
  if (probeList.length > 0) {
    out += '**Probe paths**\n```\nSTATUS 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;
}