// services/enrichment/avEnrichmentCore.js
//
// Core orchestrator for AV enrichment.
// Single place that composes:
//   - base collection (MDM + Atlas via shared filters)
//   - relevant Meraki prefilters for ports/clients
//   - parallel domain (RED/Opti)
//   - full Meraki enrichment (clients + switches/APs via shared)
//   - attach domain data with shape adapters
//   - final assembly for different output shapes
//
// Shapes:
//   'chat'     -> same shape as old collectDeviceStatus (for /avstatus, commands)
//   'rich'     -> same shape as old buildAVDevices (for /av/devices/build + topology)
//   'dashboard'-> the enriched list (for modals / avEnricher) - fully unified now
//
// This centralizes rate-limit smarts (relevant only) and makes future expansion (new sources, new commands)
// much easier without copy/paste drift.
//
// Thin callers in deviceService / avDeviceBuilder / avEnricher delegate here + adapt if needed.

import { logger } from '../../utils/logger.js';
import { collectBaseAVData, filterAVDevices } from './filters.js';
import {
  getClientsForStore,
  getPortsForStore
} from '../../integrations/meraki/clients.js';
import { getREDStatusForStore } from '../../integrations/red/players.js';
import { getOptiSignStatus } from '../../integrations/optisigns/client.js';
import { findMerakiNetwork } from '../../integrations/meraki/networks.js';
import { enrichAllMerakiData, attachMerakiClientWithPorts, enrichWirelessDetails, enrichMerakiDeviceDetails } from './merakiEnrichment.js';
import { attachDomainData } from './domainEnrichment.js';
import { enrichDomainData as sharedEnrichDomainData } from './domainEnrichment.js';
import { findBestMerakiClientMatch } from './merakiMatcher.js';
import { normalizeMac } from './normalizers.js';
import { normalizePlayerName } from '../../utils/normalize.js';
import {
    getAllMerakiDevices,
    getMerakiTopology,
} from '../../integrations/meraki/devices.js';

// ====================== CHAT ATTACHERS (MDM + Atlas + domain) ======================
// Moved here from deviceService to allow core to own the chat composition without cycles.
// These are chat-slim specific (full red object etc flow via domain attach).

export async function enrichMdmDevices(mdmResult, enrichedMeraki, redResult, optisignsResult) {
  let mdmDevices = mdmResult.value || [];
  const redPlayers = redResult.value || [];
  const optiDevices = optisignsResult.value?.devices || [];

  // Base collection already filtered (unified), no need to re-filter here
  logger('device:service', `MDM from unified base: ${mdmDevices.length} (already filtered)`, 'debug');

  // First pass: meraki matching per MDM device (using shared)
  const mdmWithMeraki = await Promise.all(mdmDevices.map(async (mdmDevice) => {
    // Be defensive: raw MDM objects may expose UserName / DeviceFriendlyName instead of friendlyName
    const friendly = mdmDevice.friendlyName || mdmDevice.DeviceFriendlyName || mdmDevice.UserName || mdmDevice.name || '';
    const normName = normalizePlayerName(friendly).toLowerCase().trim();
    const mdmMac = normalizeMac(mdmDevice.mac || mdmDevice.serial || mdmDevice.MacAddress || '');

    const matchDevice = {
      identifier: friendly,
      mdmData: mdmDevice
    };
    const matched = findBestMerakiClientMatch(matchDevice, enrichedMeraki.devices || []);
    let matchedClient = matched || (enrichedMeraki.devices || []).find(c => {
      const clientMeraki = c.meraki || c;
      const cName = clientMeraki.name || clientMeraki.description || clientMeraki.UserName || '';
      return (
        normalizeMac(clientMeraki.mac) === mdmMac ||
        normalizePlayerName(cName).toLowerCase().trim() === normName
      );
    });

    const merakiData = matchedClient ? { ... (matchedClient.meraki || matchedClient) } : {};

    return {
      ...mdmDevice,
      meraki: merakiData
    };
  }));

  // Second pass: unified domain attach (RED+Opti) for the whole list (slim for chat)
  attachDomainData(mdmWithMeraki, redPlayers, optiDevices, {
    identifierField: 'friendlyName',
    optiShape: 'display',  // slim display for /avstatus
    onlyForMSCRed: false,
    onlyForVWLEDopti: false
  });

  return mdmWithMeraki;
}

export function enrichAtlasDevices(atlasResult, enrichedMeraki) {
  const atlasDevices = atlasResult.value || [];

  return atlasDevices.map(atlasDev => {
    const state = atlasDev.state || {};
    const atlasIp = (state.IpAddress || '').trim();
    const atlasNameLower = (atlasDev.name || atlasDev.displayName || '').toLowerCase();

    // Match Atlas to enriched client using shared advanced matcher (for name strategies) + ip fallback
    // Pass ip so the general matcher can use its IP strategy (consistent with rich path)
    let matchedClient = findBestMerakiClientMatch({ 
      identifier: atlasDev.name || atlasDev.displayName || '', 
      ip: atlasIp 
    }, enrichedMeraki.devices || []);

    if (!matchedClient) {
      // Fallback search like in enrichMdmDevices, to ensure we attach Meraki for AMPs even if
      // exact matcher misses due to list shape or naming (by mac, name, or ip).
      matchedClient = (enrichedMeraki.devices || []).find(c => {
        const clientMeraki = c.meraki || c;
        const cName = clientMeraki.name || clientMeraki.description || clientMeraki.UserName || '';
        const cIp = (clientMeraki.ip || '').trim();
        const devMac = normalizeMac( atlasDev.mac || (atlasDev.state && atlasDev.state.MacAddress) || '' );
        return (
          (devMac && normalizeMac(clientMeraki.mac) === devMac) ||
          normalizePlayerName(cName).toLowerCase().trim() === normalizePlayerName(atlasDev.name || '').toLowerCase().trim() ||
          (atlasIp && cIp === atlasIp)
        );
      });
    }

    const merakiData = matchedClient
      ? { ...(matchedClient.meraki || matchedClient) }
      : {};

    return {
      ...atlasDev,
      meraki: merakiData,   // ← flat meraki object
      apDetails: matchedClient?.apDetails || null,
      switchDetails: matchedClient?.switchDetails || null
    };
  });
}

// ====================== MAIN ENTRY ======================

/**
 * Main entry: enrich AV data for a store, returning shape-specific result.
 * For 'chat' we preserve exact prior collectDeviceStatus contract (so existing commands + char + avEnricher unchanged).
 */
export async function enrichAVForStore(storeNumber, { shape = 'chat' } = {}) {
  const storeNum = String(storeNumber).trim();
  logger('av:core', `enrichAVForStore(${storeNum}, shape=${shape})`, 'debug');

  if (shape === 'chat') {
    return collectDeviceStatusViaCore(storeNum);
  }

  if (shape === 'rich' || shape === 'build') {
    return buildAVDevicesViaCore(storeNum);
  }

  if (shape === 'dashboard' || shape === 'enricher') {
    const chatShape = await collectDeviceStatusViaCore(storeNum);
    return buildDashboardList(chatShape);
  }

  throw new Error(`Unknown shape: ${shape}`);
}

/**
 * Chat/collect shape implemented via the shared pieces (no behavior change).
 * This is the body that used to live in deviceService.collectDeviceStatus.
 */
async function collectDeviceStatusViaCore(storeNum) {
  logger('device:service', `Starting device status collection for store ${storeNum} (via core)`, 'debug');

  // Get clients first so we can prefilter switches for ports (to interrogate fewer switches and avoid rate limits)
  const clientsData = await getClientsForStore(storeNum);
  const merakiClientsResultRaw = { value: clientsData };
  const clientsForPorts = Array.isArray(clientsData) ? clientsData : (clientsData?.clients || []);
  const relevantSwitchesForPorts = new Set();
  for (const c of clientsForPorts) {
    const conn = (c.recentDeviceConnection || '').toLowerCase();
    if (c.recentDeviceSerial && !conn.includes('wireless')) {
      relevantSwitchesForPorts.add(c.recentDeviceSerial);
    }
  }

  // Use unified base collection for MDM + Atlas
  const baseAV = await collectBaseAVData(storeNum, { includeDomain: true });
  // For chat/enrichMdmDevices + avStatus consumers, ensure top-level friendlyName/name + lastSeen (camelCase)
  // (the raw MDM objects from integration use PascalCase like UserName / DeviceFriendlyName / LastSeen / LastSystemSampleTime;
  // prepareMDMBaseDevice normalizes into mdmDataSummary but for chat we extract .mdmData raw for full original data.
  // Patch the expected top-level fields so display (last seen, name) + matching in enrichMdm + domain attach all work correctly.
  // This keeps the per-device Meraki/port attachment distinct.)
  const mdmBase = baseAV.filter(d => d.source === 'mdm').map(d => {
    const raw = { ...(d.mdmData || d) };
    const bestName = raw.friendlyName || raw.DeviceFriendlyName || raw.UserName || d.identifier || raw.name || '';
    if (!raw.friendlyName) raw.friendlyName = bestName;
    if (!raw.name) raw.name = bestName;
    raw.lastSeen = raw.lastSeen || raw.LastSeen || raw.LastSystemSampleTime || '';
    return raw;
  });
  const atlasBase = baseAV.filter(d => d.source === 'atlas').map(d => d.atlasData);

  const [
    merakiPortsResultRaw,
    redResult,
    optisignsResult
  ] = await Promise.allSettled([
    getPortsForStore(storeNum, relevantSwitchesForPorts),
    getREDStatusForStore(storeNum),
    getOptiSignStatus(storeNum)
  ]);

  const mdmResult = { status: 'fulfilled', value: mdmBase };
  const atlasResult = { status: 'fulfilled', value: atlasBase };

  const networkInfo = await findMerakiNetwork(storeNum);

  // FULL MERAKI via the shared (now in enrichment layer)
  const merakiEnriched = await enrichAllMerakiData(
    networkInfo?.id,
    merakiClientsResultRaw,
    merakiPortsResultRaw,
    networkInfo
  );

  // Enrich MDM with Meraki + RED + OptiSigns (chat slim shape)
  const enrichedMdm = await enrichMdmDevices(
    mdmResult,
    merakiEnriched,
    redResult,
    optisignsResult
  );

  const enrichedAtlas = enrichAtlasDevices(atlasResult, merakiEnriched);

  logger('device:service',
    `Collected for store ${storeNum}: MDM=${enrichedMdm.length}, Atlas=${enrichedAtlas.length}, ` +
    `Meraki clients=${merakiEnriched.devices.length}`);

  return {
    mdm: { status: mdmResult.status, data: enrichedMdm },
    atlas: { status: atlasResult.status, data: enrichedAtlas },
    optisigns: prepareResult(optisignsResult, 'optisigns'),
    red: prepareResult(redResult, 'red'),
    meraki: merakiEnriched,
    topology: null
  };
}

/**
 * Rich/build shape implemented via shared pieces (no behavior change from old avDeviceBuilder).
 * Replicates the orchestration but delegates client/ports/wireless/details/domain to shared,
 * keeps relevant-only for rate limits, assembles exact prior result shape.
 */
async function buildAVDevicesViaCore(storeNum) {
  logger('av:builder', `Building AV devices for store ${storeNum} (via core)`, 'debug');

  try {
    const baseDevices = await collectBaseAVData(storeNum, { includeDomain: false });

    if (!baseDevices || baseDevices.length === 0) {
      logger('av:builder', `No base devices found for store ${storeNum}`, 'warn');
    }

    const merakiData = await getClientsForStore(storeNum);

    // Prefilter switches for ports using the clients' connected device serials (only wired ones need switch ports)
    const relevantSwitchesForPorts = new Set();
    for (const c of (merakiData.clients || [])) {
      const conn = (c.recentDeviceConnection || '').toLowerCase();
      if (c.recentDeviceSerial && !conn.includes('wireless')) {
        relevantSwitchesForPorts.add(c.recentDeviceSerial);
      }
    }
    const portsData = await getPortsForStore(storeNum, relevantSwitchesForPorts);

    // Step 1: Meraki client + port enrichment (uses shared)
    let enrichedDevices = await enrichWithMerakiViaCore(
      baseDevices,
      merakiData.clients || [],
      merakiData.network?.url || '',
      portsData
    );

    // Step 2: Wireless details (only for wireless clients) - shared
    enrichedDevices = await enrichWirelessDetails(enrichedDevices, merakiData.network?.id);

    // Step 3: Meraki device details (switches + APs with wirelessStatus) - relevant only
    const allMerakiDevices = merakiData.network
      ? await getAllMerakiDevices(merakiData.network.id)
      : [];

    const relevantSerials = new Set();
    for (const device of enrichedDevices) {
      const c = device.meraki?.client || {};
      if (c.recentDeviceSerial) relevantSerials.add(c.recentDeviceSerial);
      if (c.switchSerial) relevantSerials.add(c.switchSerial);
      if (device.meraki?.apSerial) relevantSerials.add(device.meraki.apSerial);
      if (device.meraki?.switchSerial) relevantSerials.add(device.meraki.switchSerial);
    }
    const relevantDevices = allMerakiDevices.filter(d => relevantSerials.has(d.serial));
    logger('av:builder', `Enriching details only for ${relevantDevices.length}/${allMerakiDevices.length} relevant Meraki devices (to reduce rate limits)`);

    const merakiDeviceDetails = await enrichMerakiDeviceDetails(merakiData.network?.id, relevantDevices);

    // Step 4: Topology
    const topology = await getMerakiTopology(merakiData.network?.id);

    // Step 5: Domain data (RED + OptiSigns) — MUST be last, rich shape
    enrichedDevices = await sharedEnrichDomainData(enrichedDevices, storeNum, { optiShape: 'rich' });

    const result = {
      success: true,
      storeNumber: storeNum,
      network: merakiData.network || null,
      merakiDevices: allMerakiDevices,
      merakiDeviceDetails,
      merakiTopology: topology,
      deviceCount: enrichedDevices.length,
      devices: enrichedDevices,
      lastUpdated: new Date().toISOString()
    };

    logger('av:builder', `Build complete for store ${storeNum} (${enrichedDevices.length} devices)`);
    return result;

  } catch (err) {
    logger('av:builder', `Build failed for store ${storeNum}: ${err.message}`, 'error');
    throw err;
  }
}

async function enrichWithMerakiViaCore(baseDevices, allMerakiClients, networkUrl = '', portsData = null) {
  const enriched = [];
  const portStatusCache = new Map();
  const portConfigs = (portsData && (portsData.ports || portsData)) || [];

  logger('av:meraki', `Enriching ${baseDevices.length} devices with Meraki data`, 'debug');

  for (const device of baseDevices) {
    await attachMerakiClientWithPorts(device, allMerakiClients, portConfigs, portStatusCache, networkUrl);
    enriched.push(device);
  }

  // Extra visibility for the reported case (multiple historical client records for same AV)
  enriched.filter(d => /2477/i.test(d.identifier || '')).forEach(d => {
    const c = d.meraki?.client || {};
    const mdm = d.mdmData || d.mdm || {};
    const mdmLast = mdm.LastSeen || mdm.lastSeen || mdm.LastSystemSampleTime || (mdm.mdmDataSummary && mdm.mdmDataSummary.lastSeen) || 'n/a';
    logger('av:meraki', `2477 device after attach: ${d.identifier} → client lastSeen=${c.lastSeen || 'n/a'} port/switchport=${c.switchport || c.portNumber || c.recentDevicePort || 'n/a'} status=${c.status || 'n/a'} recentDev=${c.recentDeviceSerial || 'n/a'} mdmLastSeen=${mdmLast}`);
  });

  logger('av:meraki', `Meraki enrichment complete: ${enriched.filter(d => d.meraki?.client).length} matched`, 'debug');
  return enriched;
}

// ====================== DASHBOARD / AV ENRICHER LIST BUILDER ======================
// Moved here from avEnricher.js for full unification. 'dashboard' shape now returns the
// enriched list directly (used by avModalService, and avEnricher for compat).
// Uses 'raw' opti shape + identifier 'name' on the built objects.

const normalizeName = name => normalizePlayerName(name || '').toLowerCase().trim();

function getCategory(name) {
  const u = name.toUpperCase();
  if (u.includes('AMP')) return 'AMP';
  if (u.includes('VW')) return 'VW';
  if (u.includes('LED')) return 'LED';
  if (u.includes('MSC')) return 'MSC';
  return 'Other';
}

function findMerakiFallback(deviceName, merakiClients) {
  if (!Array.isArray(merakiClients)) return {};
  const normName = normalizeName(deviceName);
  return merakiClients.find(c => {
    const m = c.meraki || c || {};
    return normalizeName(m.description || m.user || m.name || '') === normName;
  }) || {};
}

function buildDashboardList(rawData) {
  const { mdm, atlas, meraki, red, optisigns } = rawData;

  logger('av:dashboard', `Enriching AV devices - MDM:${mdm?.data?.length || 0}, Atlas:${atlas?.data?.length || 0}`);

  const avDevices = [];

  // MDM Players (VW, LED, MSC) - use shared filter (strict, no domain here)
  const mdmPlayers = filterAVDevices(mdm?.data || [], false);

  for (const device of mdmPlayers) {
    avDevices.push(enrichOneDevice(device, 'MDM', rawData));
  }

  // Atlas AMPs
  const atlasAmps = (atlas?.data || []).filter(d => 
    (d.name || d.displayName || '').toLowerCase().includes('amp')
  );

  for (const device of atlasAmps) {
    avDevices.push(enrichOneDevice(device, 'Atlas', rawData));
  }

  // Domain (red/opti) attachment now unified via shared (use 'raw' shape to preserve previous dashboard behavior)
  attachDomainData(avDevices, rawData.red?.data || [], rawData.optisigns?.data?.devices || [], {
    identifierField: 'name',
    optiShape: 'raw',
    onlyForMSCRed: false,
    onlyForVWLEDopti: false
  });

  logger('av:dashboard', `Final enriched AV devices: ${avDevices.length}`);
  return avDevices;
}

function enrichOneDevice(sourceDevice, sourceType, rawData) {
  const name = sourceDevice.friendlyName || sourceDevice.name || sourceDevice.displayName || 'Unknown';
  const category = getCategory(name);
  const isAtlasAmp = category === 'AMP';

  // Use the meraki object already attached (best source)
  let merakiData = sourceDevice.meraki || {};

  // If it's empty or not an object, do a strict fallback search using the shared advanced matcher
  if (!merakiData || typeof merakiData !== 'object' || Object.keys(merakiData).length < 5) {
    const matchDevice = { identifier: name };
    const matched = findBestMerakiClientMatch(matchDevice, rawData.meraki?.devices || []);
    merakiData = matched || findMerakiFallback(name, rawData.meraki?.devices || []);
  }

  const switchportStatus = (merakiData && merakiData.switchportStatus) || {};
  const switchportConfig = (merakiData && merakiData.switchportConfig) || {};

  return {
    identifier: name,
    name: name,
    deviceCategory: category,
    source: sourceType,
    isAtlasAmp,

    ip: merakiData.ip || sourceDevice.state?.IpAddress || sourceDevice.ip,
    mac: merakiData.mac || sourceDevice.mac || sourceDevice.serialNumber,
    vlan: merakiData.vlan,
    switchport: merakiData.switchport || merakiData.portNumber,
    status: merakiData.status || 'Online',
    lastSeen: merakiData.lastSeen || sourceDevice.lastSeen,

    meraki: merakiData,
    switchportStatus,
    switchportConfig,

    mdm: sourceType === 'MDM' ? sourceDevice : null,
    atlas: isAtlasAmp ? sourceDevice : null,

    // red/optisigns attached post-build via shared attachDomainData (raw shape for dashboard)
    // (removed from here to unify)

    usage: merakiData.usage || { sent: 0, recv: 0 }
  };
}

function prepareResult(result, name) {
  if (result.status === 'fulfilled') return { status: 'success', data: result.value };
  logger('device:service', `${name} fetch failed: ${result.reason?.message || result.reason}`, 'warn');
  return { status: 'failed', error: result.reason?.message || result.reason || 'Unknown error' };
}

export { buildDashboardList };  // for avEnricher compat / direct dashboard list use

export default {
  enrichAVForStore,
};