// src/services/renderers/phoneStatusRenderer.js
//
// Extracted from commands/voiceStatus.js so the same output can drive
// BOTH the chat reply (`bot.say('markdown', md)`) AND the Jira poller
// comment (via utils/markdownToAdf).
//
// Options
//   storeNum   (required)  header string uses it
//   detailed   default false — mirrors chat's `?detailed=true` toggle:
//              adds SIP URLs / alt SIPs, more port info, PoE state, etc.
//   footer     default true  — appends the `*Last checked: HH:MM*`
//              italic line. Chat passes true (unchanged). Poller passes
//              false because a Jira comment already has an authoritative
//              header timestamp and a Jira-side comment `created` field.
//
// The renderer is pure (no I/O). All time-derived output goes through
// `simpleTimeAgo` — the same helper the chat handler used, so relative
// times ("2h ago") stay consistent across chat and Jira surfaces.

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

/**
 * Render a phone-status markdown snapshot from a `collectPhoneStatus`
 * result.
 *
 * @param {object} data                collectPhoneStatus() output
 * @param {object} opts
 * @param {string} opts.storeNum       2-6 digit store id (header text)
 * @param {boolean} [opts.detailed=false]
 * @param {boolean} [opts.footer=true]
 * @returns {string} markdown, whitespace-trimmed and ready to send.
 */
export function renderPhoneStatusMarkdown(data, opts = {}) {
  const {
    storeNum,
    detailed = false,
    footer = true,
  } = opts;

  let reply = `**Voice Status - Store ${storeNum}**\n\n`;

  const phones = data.phones?.data || [];
  const dectBasestations = data.dectBasestations || [];
  const dectHandsets = data.dectHandsets || [];
  const dectNet = data.dectNetwork || null;

  if (phones.length === 0 && dectBasestations.length === 0) {
    reply += 'No phones or DECT basestations found.\n';
    return reply.trim();
  }

  const prof = data.telephonyProfile || {};
  const pers = data.person || {};
  if (prof.timeZone) {
    reply += `**Timezone:** ${prof.timeZone}\n`;
  }
  if (data.locationMainNumber) {
    let extPart = '';
    if (pers.phoneNumbers && pers.phoneNumbers.length > 0) {
      const nums = pers.phoneNumbers.map(n => n.value || n).filter(Boolean);
      if (nums.length > 0) {
        extPart = ` (${nums.join(', ')})`;
      }
    }
    reply += `**PhoneNumber:** ${data.locationMainNumber}${extPart}\n\n`;
  }
  if (detailed && prof.outgoingPermission) {
    const op = prof.outgoingPermission;
    const mode = op.useCustomEnabled ? 'custom rules' : 'default';
    const ruleCount = op.callingPermissions ? op.callingPermissions.length : 0;
    reply += `Outgoing: ${mode} (${ruleCount} permission entries)\n\n`;
  }

  // Desk Phones
  if (phones.length > 0) {
    reply += '**Desk Phones:**\n';
    phones.forEach(phone => {
      const lastSeen = simpleTimeAgo(phone.lastSeen) || 'unknown';
      let prefix = '✅ ';
      if (phone.status !== 'connected') prefix = '⚠️ ';

      reply += `${prefix}**${phone.displayName || phone.name || 'Unknown Phone'}** (${phone.status}) Last seen: ${lastSeen}\n`;

      const fw = phone.firmware && phone.firmware !== '—' ? ` FW: ${phone.firmware}` : '';
      const ser = phone.serial && phone.serial !== '—' ? ` Serial: ${phone.serial}` : '';
      if (fw || ser) {
        reply += `   ${fw}${ser ? (fw ? ' •' : '') + ser : ''}\n`;
      }
      if (detailed && phone.primarySipUrl && phone.primarySipUrl !== '—') {
        reply += `   SIP: ${phone.primarySipUrl}\n`;
      }
      if (detailed && phone.sipUrls && phone.sipUrls.length > 1) {
        reply += `   Alt SIPs: ${phone.sipUrls.slice(0, 2).join(', ')}${phone.sipUrls.length > 2 ? '…' : ''}\n`;
      }
      if (phone.errorCodes && phone.errorCodes.length > 0) {
        reply += `   ⚠️ Errors: ${phone.errorCodes.join(', ')}\n`;
      }

      if (phone.meraki && (phone.meraki.port || phone.meraki.switchName)) {
        let mPrefix = '';
        if (phone.meraki.status !== 'Online') mPrefix = '⚠️ ';
        reply += ` •${mPrefix}**${phone.meraki.switchName || 'Unknown Switch'}** (${phone.meraki.status || 'unknown'}) ` +
                 `Wired • Port: ${phone.meraki.port || '—'} • VLAN: ${phone.meraki.vlan || '—'} ` +
                 `• IP: ${phone.meraki.ip || '—'} LastSeen: ${simpleTimeAgo(phone.meraki.lastSeen)}${phone.meraki.clientUrl ? ` [Meraki↗](${phone.meraki.clientUrl})` : ''}\n`;

        const u = phone.meraki.usage;
        if (u && (u.sent || u.recv || u.total)) {
          const sent = formatBytes(u.sent || 0);
          const recv = formatBytes(u.recv || 0);
          const tot = u.total ? formatBytes(u.total) : '';
          reply += `   Data (recent): ${sent} sent / ${recv} recv${tot ? ' (total ' + tot + ')' : ''}\n`;
        }
        if (detailed) {
          const poe = phone.meraki.poeEnabled != null ? (phone.meraki.poeEnabled ? 'PoE on' : 'PoE off') : '';
          const spd = phone.meraki.speed ? `${phone.meraki.speed}` : '';
          const pol = phone.meraki.portName ? `port ${phone.meraki.portName}` : '';
          const extras = [poe, spd, pol].filter(Boolean).join(' • ');
          if (extras) reply += `   ${extras}\n`;
          if (phone.meraki.accessPolicy) reply += `   Policy: ${phone.meraki.accessPolicy}\n`;
        }
      } else if (detailed) {
        reply += `   (no recent Meraki client/switch data)\n`;
      }
      reply += '\n';
    });
  }

  // DECT Basestations
  if (dectBasestations.length > 0) {
    reply += '**DECT Basestations:**\n';

    // Multicast health signal — DECT relies on multicast for basestation
    // discovery / handset registration handshakes. When IGMP snooping is
    // on without a corresponding querier, or when flood-unknown is off,
    // those frames get dropped and DECT registration silently fails.
    // Only emitted when the summarizer says `needsFix` — the healthy
    // state is common and would just add noise. Silent on fetch errors
    // (summarizer returns needsFix:false + error:...) so a diagnostic
    // bot doesn't itself become a new source of noise.
    if (data.multicast?.needsFix) {
      const mc = data.multicast;
      const parts = [];
      if (mc.defaultSnoopOn)  parts.push('IGMP snoop=ON default');
      if (mc.defaultFloodOff) parts.push('flood-unknown=OFF default');
      const overrideCount = mc.deviatingOverrides?.length || 0;
      if (overrideCount > 0) {
        parts.push(`${overrideCount} switch override(s) deviate from DECT-safe defaults`);
      }
      // parts is always non-empty here: needsFix implies at least one deviation
      reply += `**Multicast:** ⚠️ ${parts.join(', ')} — may disrupt DECT\n`;
    }

    if (dectNet) {
      reply += `**Network:** ${dectNet.name || '—'} (assigned handsets: ${dectNet.handsetsCount || 0})\n`;
    }
    dectBasestations.forEach(base => {
      let prefix = '✅ ';
      if (base.meraki?.status !== 'Online') prefix = '⚠️ ';

      const lines = base.linesRegistered != null ? ` (lines: ${base.linesRegistered})` : '';
      reply += `${prefix}**Basestation ${base.mac || 'Unknown'}**${lines}\n`;

      if (base.meraki && (base.meraki.port || base.meraki.switchName)) {
        let mPrefix = '';
        if (base.meraki.status !== 'Online') mPrefix = '⚠️ ';
        reply += ` •${mPrefix}**${base.meraki.switchName || 'Unknown Switch'}** (${base.meraki.status || 'unknown'}) ` +
                 `Wired • Port: ${base.meraki.port || '—'} • VLAN: ${base.meraki.vlan || '—'} ` +
                 `• IP: ${base.meraki.ip || '—'} LastSeen: ${simpleTimeAgo(base.meraki.lastSeen)}${base.meraki.clientUrl ? ` [Meraki↗](${base.meraki.clientUrl})` : ''}\n`;
        if (detailed && base.meraki.usage) {
          const u = base.meraki.usage;
          reply += `   Data (recent): ${formatBytes(u.sent || 0)} sent / ${formatBytes(u.recv || 0)} recv\n`;
        }
      } else {
        reply += `   (no recent Meraki client/switch data — possibly offline or not attached to this network)\n`;
      }

      const registeredHandsets = dectHandsets.filter(h => h.baseStationId === base.id);
      if (registeredHandsets.length > 0) {
        registeredHandsets.forEach(h => {
          reply += ` • **${h.index}-${h.name || 'Handset'}** (ext ${h.extension || '—'}) Registered: ${simpleTimeAgo(h.lastRegistrationTime)}\n`;
        });
      } else {
        reply += `   No handsets registered\n`;
      }
      reply += '\n';
    });

    const unregisteredHandsets = dectHandsets.filter(h => !h.baseStationId);
    if (unregisteredHandsets.length > 0) {
      reply += '**Unregistered Handsets:**\n';
      unregisteredHandsets.forEach(h => {
        reply += ` • **${h.index}-${h.name || 'Handset'}** (ext ${h.extension || '—'}) Registered: ${simpleTimeAgo(h.lastRegistrationTime)}\n`;
      });
      reply += '\n';
    }
  }

  if (detailed) {
    reply += `_Detailed mode — additional fields above (use without ?detailed=true for compact view)_\n`;
  }

  if (footer) {
    reply += `\n*Last checked: ${formatDisplayTime()}*`;
  }

  return reply.trim();
}