// integrations/cisco-mpp-phone/probes.js
//
// Read-only probes against Cisco MPP desk phones (Webex Calling).
// Current-release Webex MPP firmware uses JSON endpoints on the SPA
// web UI (not legacy /admin/status.xml).

import { tryRequest } from './client.js';
import { parseCfgXml } from './statusXml.js';

export const READ_PROBE_PATHS = [
  { path: '/', purpose: 'user web landing (SPA shell)' },
  { path: '/Status.json', purpose: 'primary status JSON (Info > Status tab)' },
  { path: '/Download%20Status.json', purpose: 'provisioning + firmware upgrade history' },
  { path: '/ns.json', purpose: 'network statistics JSON' },
  { path: '/basic/System.json', purpose: 'system configuration JSON (admin fields)' },
  // Legacy fallbacks (older MPP loads / CUCM-style)
  { path: '/admin/status.xml', purpose: 'legacy admin status XML' },
  { path: '/status.xml', purpose: 'legacy user status XML' },
  { path: '/admin/cfg.xml', purpose: 'legacy admin config XML' },
];

export const EXPLORE_PROBE_PATHS = [
  { path: '/Debug%20Info.json', purpose: 'debug info JSON' },
  { path: '/basic/init.json', purpose: 'UI layout metadata' },
  { path: '/admin/advanced', purpose: 'legacy admin HTML landing' },
];

export const MUTATING_ACTION_PATHS = Object.freeze({
  REBOOT: '/admin/reboot',
  RESYNC: '/admin/resync',
  UPGRADE: '/admin/upgrade',
});

export async function runProbeList(client, pathList) {
  const results = [];
  for (const { path, purpose } of pathList) {
    const r = await tryRequest(client, { method: 'GET', path });
    results.push({ ...r, purpose });
  }
  return results;
}

export async function runReadProbes(client) {
  return runProbeList(client, READ_PROBE_PATHS);
}

export async function runExploreProbes(client) {
  return runProbeList(client, [...READ_PROBE_PATHS, ...EXPLORE_PROBE_PATHS]);
}

export async function runPhoneProbe(client, { includeBodies = false } = {}) {
  const started = Date.now();
  const probes = await runReadProbes(client);

  const statusJson = await fetchBodyIfOk(probes, client, '/Status.json');
  const statusXml = !statusJson
    ? (await fetchBodyIfOk(probes, client, '/admin/status.xml')
      || await fetchBodyIfOk(probes, client, '/status.xml'))
    : null;

  const downloadStatusJson = await fetchBodyIfOk(probes, client, '/Download%20Status.json');
  const nsJson = await fetchBodyIfOk(probes, client, '/ns.json');
  const systemJson = await fetchBodyIfOk(probes, client, '/basic/System.json');
  const cfgXml = await fetchBodyIfOk(probes, client, '/admin/cfg.xml');
  const cfgParsed = cfgXml ? parseCfgXml(cfgXml) : null;

  const summary = summarizeProbes(probes, { statusJson, statusXml });

  return {
    probes: includeBodies ? await attachBodies(client, probes) : probes,
    summary,
    statusJson,
    downloadStatusJson: downloadStatusJson || null,
    nsJson: nsJson || null,
    systemJson: systemJson || null,
    statusXml,
    cfgXml: includeBodies ? cfgXml : (cfgXml ? truncate(cfgXml, 4000) : null),
    cfgParsed: cfgParsed?.highlights || null,
    byteLength: statusJson
      ? Buffer.byteLength(statusJson, 'utf8')
      : (statusXml ? Buffer.byteLength(statusXml, 'utf8') : null),
    elapsedMs: Date.now() - started,
  };
}

export async function fetchStatusJson(client) {
  const r = await tryRequest(client, { method: 'GET', path: '/Status.json' });
  if (r.status === 200 && r.sizeBytes > 0) {
    const body = await fetchBody(client, '/Status.json');
    return {
      rawJson: body,
      rawXml: null,
      byteLength: Buffer.byteLength(body || '', 'utf8'),
      probe: r,
      path: '/Status.json',
    };
  }
  const xml = await fetchStatusXml(client);
  return {
    rawJson: null,
    rawXml: xml.rawXml,
    byteLength: xml.byteLength,
    probe: xml.probe,
    path: xml.path,
  };
}

export async function fetchStatusXml(client) {
  for (const path of ['/admin/status.xml', '/status.xml']) {
    const r = await tryRequest(client, { method: 'GET', path });
    if (r.status === 200 && r.sizeBytes > 0) {
      const body = await fetchBody(client, path);
      return { rawXml: body, byteLength: Buffer.byteLength(body || '', 'utf8'), probe: r, path };
    }
  }
  const err = new Error('phone returned no Status.json or status.xml');
  err.code = 'PHONE_BAD_STATUS';
  throw err;
}

async function fetchBodyIfOk(probes, client, path) {
  const p = probes.find((row) => row.path === path);
  if (p?.status === 200 && p.sizeBytes > 0) {
    return fetchBody(client, path);
  }
  return null;
}

async function fetchBody(client, path) {
  try {
    const res = await client.get(path);
    return typeof res.data === 'string' ? res.data : JSON.stringify(res.data ?? '');
  } catch {
    return null;
  }
}

async function attachBodies(client, probes) {
  const out = [];
  for (const p of probes) {
    if (p.status === 200 && p.sizeBytes > 0) {
      const body = await fetchBody(client, p.path);
      out.push({ ...p, body: body ?? null });
    } else {
      out.push({ ...p, body: null });
    }
  }
  return out;
}

function truncate(str, max) {
  if (!str || str.length <= max) return str;
  return `${str.slice(0, max)}\n<!-- truncated ${str.length - max} bytes -->`;
}

export function summarizeProbes(probes, { statusJson = null, statusXml = null } = {}) {
  const okCount = probes.filter((p) => p.status === 200).length;
  const authOk = probes.some((p) => p.status === 200);
  const statusJsonFound = probes.some(
    (p) => p.path === '/Status.json' && p.status === 200 && p.sizeBytes > 0,
  ) || !!statusJson;
  const statusXmlFound = probes.some(
    (p) => (p.path === '/admin/status.xml' || p.path === '/status.xml')
      && p.status === 200 && p.sizeBytes > 0,
  ) || !!statusXml;
  return {
    okCount,
    total: probes.length,
    authOk,
    statusJsonFound,
    statusXmlFound,
    statusJsonBytes: statusJson ? Buffer.byteLength(statusJson, 'utf8') : 0,
    statusXmlBytes: statusXml ? Buffer.byteLength(statusXml, 'utf8') : 0,
    forbidden: probes.filter((p) => p.status === 403).map((p) => p.path),
    unauthorized: probes.filter((p) => p.status === 401).map((p) => p.path),
    notFound: probes.filter((p) => p.status === 404).map((p) => p.path),
    okPaths: probes.filter((p) => p.status === 200).map((p) => p.path),
  };
}

export async function getPath(client, path) {
  return tryRequest(client, { method: 'GET', path });
}