// src/integrations/meraki/clients.js
import { fetchAllPages } from './client.js';
import { logger } from '../../utils/logger.js';
import { findMerakiNetwork } from './networks.js';
import { merakiAxios } from './client.js';
import { findBestMerakiClientMatch } from '../../services/enrichment/merakiMatcher.js';
import { attachMerakiClientWithPorts } from '../../services/enrichment/merakiEnrichment.js';
/**
 * Get all clients from a network
 */
export async function getMerakiClients(networkId, timespanDays = 7) {
  logger('meraki:clients', `Fetching clients for network ${networkId} (timespan: ${timespanDays} days)`, 'debug');

  if (!networkId) {
    logger('meraki:clients', 'No networkId provided', 'warn');
    return [];
  }

  try {
    const timespanSeconds = timespanDays * 24 * 60 * 60;
    const url = `/networks/${networkId}/clients?perPage=5000&timespan=${timespanSeconds}`;

    const clients = await fetchAllPages(url);

    logger('meraki:clients', `Fetched ${clients.length} clients from network ${networkId}`, 'debug');
    return clients;

  } catch (err) {
    logger('meraki:clients', `Error fetching clients for network ${networkId}: ${err.message}`, 'error');
    return [];
  }
}

/**
 * Get clients for a specific store — now returns { clients, network }
 */
export async function getClientsForStore(storeNumber, timespanDays = 7) {
  const network = await findMerakiNetwork(storeNumber);   // ← full object
  if (!network) {
    logger('meraki:clients', `No network found for store ${storeNumber}`);
    return { clients: [], network: null, networkId: null };
  }

  const clients = await getMerakiClients(network.id, timespanDays);
  return { 
    clients, 
    network,           // ← full network object with .url
    networkId: network.id 
  };
}

/**
 * Get detailed port status and configuration for a network
 * Only queries MS switches (Meraki Switch devices)
 */
export async function getMerakiPorts(networkId) {
  logger('meraki:ports', `Fetching port configurations for network ${networkId}`, 'debug');

  if (!networkId) {
    logger('meraki:ports', 'No networkId provided', 'warn');
    return [];
  }

  try {
    const devicesUrl = `/networks/${networkId}/devices`;
    const devices = await fetchAllPages(devicesUrl);

    let allPorts = [];

    for (const device of devices) {
      // Only MS switches support switch ports endpoint
      if (!device.model || !device.model.startsWith('MS')) {
        logger('meraki:ports', `Skipping non-switch device ${device.serial} (${device.model || 'unknown'})`, 'debug');
        continue;
      }

      logger('meraki:ports', `Fetching ports for MS switch ${device.serial} (${device.model})`);

      try {
        const portsUrl = `/devices/${device.serial}/switch/ports`;
        const ports = await fetchAllPages(portsUrl);

        const enrichedPorts = ports.map(port => ({
          deviceSerial: device.serial,
          deviceName: device.name || device.model,
          model: device.model,
          portId: port.portId,
          portNumber: port.number,
          enabled: port.enabled,
          status: port.status || 'unknown',
          poeEnabled: port.poeEnabled,
          poePower: port.poePower || 0,
          accessPolicy: port.accessPolicy,
          stickyMac: port.stickyMac || false,
          allowedMacs: port.allowedMacs || [],
          // 'access' | 'trunk' | undefined. Preserved so /voicediag
          // port-hygiene checks can flag phones that end up on a
          // trunk uplink (downstream through a non-Meraki switch,
          // typically a Cisco stack) where per-port policy isn't
          // visible from our side.
          portType: port.type || null,
          voiceVlan: port.voiceVlan,
          dataVlan: port.vlan,
          portName: port.name || `Port ${port.number}`,
          errors: port.errors || [],
          packetErrors: {
            rxErrors: port.rxErrors || 0,
            txErrors: port.txErrors || 0,
            collisions: port.collisions || 0
          },
          lastUpdated: port.lastUpdated || null
        }));

        allPorts = allPorts.concat(enrichedPorts);
      } catch (portErr) {
        logger('meraki:ports', `Failed to fetch ports for device ${device.serial}: ${portErr.message}`, 'warn');
        // Continue with other devices
      }
    }

    logger('meraki:ports', `Total ports collected from MS switches: ${allPorts.length}`, 'debug');
    return allPorts;

  } catch (err) {
    logger('meraki:ports', `Error fetching port data for network ${networkId}: ${err.message}`, 'error');
    return [];
  }
}

export async function getPortsForStore(storeNumber, relevantSwitchSerials = null) {
  logger('meraki:ports', `Getting ports for store ${storeNumber}`, 'debug');
  const network = await findMerakiNetwork(storeNumber);
  const networkId = network?.id;
  if (!networkId) {
    logger('meraki:ports', `No network found for store ${storeNumber}`, 'warn');
    return [];
  }

  try {
    // Get all devices in the network
    const devices = await fetchAllPages(`/networks/${networkId}/devices`);
    let msSwitches = devices.filter(d => d.model && d.model.startsWith('MS'));

    if (relevantSwitchSerials && relevantSwitchSerials.size > 0) {
      msSwitches = msSwitches.filter(sw => relevantSwitchSerials.has(sw.serial));
      logger('meraki:ports', `Filtered to ${msSwitches.length} relevant switches for ports (to reduce rate limits)`);
    }

    let allPorts = [];

    for (const sw of msSwitches) {
      try {
        logger('meraki:ports', `Fetching ports for switch ${sw.serial} (${sw.name || sw.model})`, 'debug');
        const ports = await fetchAllPages(`/devices/${sw.serial}/switch/ports`);

        const enrichedPorts = ports.map(p => ({
          ...p,
          deviceSerial: sw.serial,
          deviceName: sw.name || sw.model || 'Unknown Switch',
          model: sw.model,
          // Explicitly map known fields
          portId: p.portId || p.number,
          status: p.status || (p.enabled ? 'Enabled' : 'Disabled'), // fallback
          accessPolicy: p.accessPolicy || null,   // may still be missing
          stickyMac: p.stickyMac || false,
          allowedMacs: p.allowedMacs || [],
        }));

        allPorts = allPorts.concat(enrichedPorts);
      } catch (err) {
        logger('meraki:ports', `Error fetching ports for ${sw.serial}: ${err.message}`, 'warn');
      }
    }

    logger('meraki:ports', `Total ports collected from MS switches: ${allPorts.length}`, 'debug');
    return allPorts;
  } catch (err) {
    logger('meraki:ports', `Error fetching ports for store ${storeNumber}: ${err.message}`, 'error');
    return [];
  }
}

/**
 * Get full Layer-2 topology (nodes + links) from Meraki
 * Uses the official Topology API you asked about
 */
export async function getLinkLayerTopology(networkId) {
  if (!networkId) {
    logger('meraki:topology', 'No networkId provided', 'warn');
    return { nodes: [], links: [], errors: [] };
  }

  try {
    logger('meraki:topology', `Fetching linkLayer topology for network ${networkId}`);

    // This endpoint is NOT paginated → single call
    const url = `/networks/${networkId}/topology/linkLayer`;
    const response = await merakiAxios.get(url);   // uses your existing axios instance

    const topology = response.data || { nodes: [], links: [], errors: [] };

    logger('meraki:topology', 
      `✅ Received ${topology.nodes?.length || 0} nodes and ${topology.links?.length || 0} links`);

    return topology;

  } catch (err) {
    logger('meraki:topology', `Failed to fetch topology: ${err.message}`, 'error');
    return { nodes: [], links: [], errors: [err.message] };
  }
}

export async function getWirelessClientConnectionStats(networkId, clientId) {
  const timespan = 86400; // 24 hours. Use 604800 for full 7 days if you want more history

  try {
    const response = await merakiAxios.get(
      `/networks/${networkId}/wireless/clients/${clientId}/connectionStats?timespan=${timespan}`
    );

    logger('meraki:clients', 'Connection stats response received');

    // Extract the nested connectionStats object, or return empty
    const rawStats = response.data?.connectionStats || {};

    return {
      assoc: rawStats.assoc || 0,
      auth: rawStats.auth || 0,
      dhcp: rawStats.dhcp || 0,
      dns: rawStats.dns || 0,
      success: rawStats.success || 0
    };

  } catch (err) {
    logger('meraki', `Connection stats failed for ${clientId}: ${err.message}`, 'warn');
    return { assoc: 0, auth: 0, dhcp: 0, dns: 0, success: 0 };
  }
}

export async function getWirelessClientHealthScores(networkId, clientId) {
  try {
    const response = await merakiAxios.get(
      `/networks/${networkId}/wireless/clients/${clientId}/healthScores`
    );

    logger('meraki:clients', 'Health scores response received');

    return response.data || {};

  } catch (err) {
    logger('meraki', `Health scores failed for ${clientId}: ${err.message}`, 'warn');
    return {};
  }
}
/**
 * Get port configuration for a specific switch port
 */
export async function getSwitchPortConfig(serial, portId) {
  try {
    const res = await merakiAxios.get(`/devices/${serial}/switch/ports/${portId}`);
    return res.data;
  } catch (err) {
    logger('meraki:ports', `Port config failed for ${serial}:${portId}`, 'warn');
    return null;
  }
}

/**
 * Get port status for a specific switch port (uses cached statuses per switch)
 * Note: We still use the builder's portStatusCache for now, but this can be moved later if desired.
 */
export async function getSwitchPortStatus(serial, portId, portStatusCache) {
  if (!portStatusCache.has(serial)) {
    try {
      const res = await merakiAxios.get(`/devices/${serial}/switch/ports/statuses`);
      portStatusCache.set(serial, res.data || []);
    } catch (err) {
      logger('meraki:ports', `Port statuses failed for switch ${serial}`, 'warn');
      portStatusCache.set(serial, []);
    }
  }

  const statuses = portStatusCache.get(serial) || [];
  return statuses.find(p => String(p.portId || p.number) === String(portId)) || null;
}

/**
 * Get *all* port statuses for a switch in one call (batch /statuses).
 * Returns the array directly (for use in switches map for chat path etc).
 */
export async function getSwitchPortsStatuses(serial) {
  try {
    const res = await merakiAxios.get(`/devices/${serial}/switch/ports/statuses`);
    return res.data || [];
  } catch (err) {
    logger('meraki:ports', `Failed to get port statuses for switch ${serial}: ${err.message}`, 'warn');
    return [];
  }
}

/**
 * Enrich a single AV device with Meraki client + port data
 * This centralizes all client matching and port fetching
 */
export async function enrichDeviceWithMeraki(device, allMerakiClients, portStatusCache) {
  // Delegate fully to shared (unified)
  // Note: portStatusCache passed through
  await attachMerakiClientWithPorts(device, allMerakiClients, [], portStatusCache);  // portConfigs empty here, or pass if available
  // The shared attachMerakiClientWithPorts will set client + ports
  // We keep wireless null as before
  if (device.meraki) {
    device.meraki.wirelessDetails = device.meraki.wirelessDetails || null;
    device.meraki.wirelessSummary = device.meraki.wirelessSummary || null;
  }
  return device;
}

export default {
  getMerakiClients,
  getClientsForStore,
  getMerakiPorts,
  getPortsForStore,
  getWirelessClientConnectionStats,
  getWirelessClientHealthScores,
  getSwitchPortConfig,
  getSwitchPortStatus,
  getSwitchPortsStatuses,
  enrichDeviceWithMeraki   // new
};