// src/services/renderers/phoneStatusRenderer.js
//
// Extracted from commands/phoneStatus.js so the same output can drive
// BOTH the chat reply (`bot.say('markdown', md)`) AND the Jira poller
// comment (via utils/markdownToAdf). Byte-for-byte identical to what
// the chat command used to emit for a given input.
//
// 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 } 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]
 * @param {number}  [opts.dectFollowUpBaseCount=0]
 *   When > 0, emits an "⏳ DECT base data loading for N base(s)…"
 *   line inside the DECT Basestations section. Signals to the reader
 *   that a follow-up message with base-station diagnostics is on the
 *   way. Chat handler passes this after the base count comes back
 *   from discoverDectBases(); poller and HTTP callers pass 0.
 * @returns {string} markdown, whitespace-trimmed and ready to send.
 */
export function renderPhoneStatusMarkdown(data, opts = {}) {
  const { storeNum, detailed = false, footer = true, dectFollowUpBaseCount = 0 } = opts;

  let reply = `**Phone 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';
    }

    // DECT relay follow-up notice. Only shown when the caller has
    // told us a follow-up is actually in-flight (chat handler, after
    // discoverDectBases returned a non-empty list). Silent for HTTP /
    // Jira surfaces where a follow-up doesn't happen.
    if (dectFollowUpBaseCount > 0) {
      const n = dectFollowUpBaseCount;
      reply += `_⏳ Base-station diagnostics loading for ${n} base${n === 1 ? '' : 's'} — a follow-up message will arrive shortly._\n\n`;
    }
  }

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

  if (footer) {
    reply += `\n*Last checked: ${new Date().toLocaleTimeString()}*`;
  }

  return reply.trim();
}

// ─── DECT base-station diagnostics (follow-up message) ──────────────
//
// Separate exported renderer for the follow-up message that arrives
// ~10-30s after the main /phonestatus output. Input is the array
// returned by services/dectCollectorService.collectAll(): per-base
// { ok, data (parsed status), verdict, error } records.
//
// Chat surface stays compact — most operators only need to see the
// exceptional stuff (warnings, recent power-loss reboots). Firmware
// / emergency numbers / detailed reboot log stay behind the future
// /dectstatus command where the full CLI-style dump makes more sense.

/**
 * @param {Array} results        collectAll() output
 * @param {object} opts
 * @param {string} opts.storeNum
 * @param {boolean} [opts.footer=true]
 * @returns {string} markdown, whitespace-trimmed. Empty string when
 *          the input list is empty (caller shouldn't send a message
 *          in that case).
 */
export function renderDectDiagnosticsMarkdown(results, opts = {}) {
  const { storeNum, footer = true } = opts;
  const list = Array.isArray(results) ? results : [];
  if (list.length === 0) return '';

  let out = `**DECT Base Station Diagnostics — Store ${storeNum}**\n\n`;

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

  if (footer) {
    out += `\n*Base diagnostics pulled at ${new Date().toLocaleTimeString()} via the DECT relay. Use \`/dectstatus ${storeNum}\` for full details and reboot/factory-reset controls.*`;
  }
  return out.trim();
}

function renderOneBase(r) {
  const label = r.base?.name || `Basestation ${r.base?.mac || '?'}`;
  const ip = r.base?.ip || '?';
  if (!r.ok) {
    return `⚠️ **${label}** (${ip}) — collect failed: ${r.error?.message || 'unknown error'}` +
      (r.error?.hint ? `\n   _${r.error.hint}_\n` : '\n');
  }

  const data = r.data || {};
  const verdict = r.verdict || {};
  const uptimeText = data.time?.operatingTime || '?';
  const fw = data.firmware?.version || '?';
  const conflict = data.conflictInfo && data.conflictInfo !== 'No Conflict'
    ? ` • RF conflict: ${data.conflictInfo}` : '';
  const role = data.multiCell?.role ? ` • role: ${data.multiCell.role}` : '';

  // Header line uses a checkmark or warning depending on verdict.
  const icon = verdict.healthy ? '✅' : '⚠️';
  let out = `${icon} **${label}** (${ip}) — uptime ${uptimeText} • fw ${fw}${role}${conflict}\n`;

  // Most-recent Power Loss reboot (if any in the last-6 log) is the
  // highest-signal thing we can surface here. Anything else falls
  // under "warnings" below.
  const powerLoss = (data.rebootLog || []).find((entry) => entry.reasonCode === 80);
  if (powerLoss) {
    out += `   ⚡ Recent power loss: ${powerLoss.at} (reboot #${powerLoss.sequence})\n`;
  }

  // Warnings from summarizeBaseHealth() are already user-facing
  // strings; render as a bulleted list under the header.
  if (Array.isArray(verdict.warnings) && verdict.warnings.length > 0) {
    for (const w of verdict.warnings) {
      // Skip the power-loss warning if we already surfaced the
      // structured line above — avoids duplication.
      if (powerLoss && /power.?loss/i.test(w)) continue;
      out += `   ⚠️ ${w}\n`;
    }
  }

  // RTP: only show if there's an active session — usually the
  // diagnostic reader cares whether a call is up right now, not
  // that this base has served 2 total calls since boot.
  if ((data.rtp?.current || 0) > 0) {
    out += `   📞 ${data.rtp.current} active RTP session(s)\n`;
  }

  return out;
}