import { mkdir, writeFile } from 'node:fs/promises';
import { request } from 'node:https';
import { dirname, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

const baseUrl = (process.env.LISGLOSIPS_BASE_URL || 'https://100.90.90.91').replace(/\/$/, '');
const username = process.env.LISGLOSIPS_AUTH_USERNAME || 'admin';
const password = process.env.LISGLOSIPS_AUTH_PASSWORD;
const lowUsername = process.env.LISGLOSIPS_LOW_AUTH_USERNAME || 'codex.low';
const lowPassword = process.env.LISGLOSIPS_LOW_AUTH_PASSWORD || `${password}!low`;
const timeoutMs = Number(process.env.LISGLOSIPS_CALLS_TIMEOUT_MS || 30000);
const reportDir = resolve(dirname(fileURLToPath(import.meta.url)), '../reports');

if (!password) {
  console.error('LISGLOSIPS_AUTH_PASSWORD is required.');
  process.exit(2);
}

function requestApi(path, options = {}) {
  return new Promise((resolveRequest) => {
    const startedAt = Date.now();
    const url = new URL(path, baseUrl);
    const method = options.method || 'GET';
    const body = options.body === undefined ? undefined : JSON.stringify(options.body);
    const headers = {
      Accept: 'application/json',
      'User-Agent': 'lisglosips-remote-calls-cdr-billing/1.0',
      ...(body ? { 'Content-Type': 'application/json', 'Content-Length': Buffer.byteLength(body) } : {}),
      ...(options.accessToken ? { Authorization: `Bearer ${options.accessToken}` } : {}),
    };

    console.log(`REQ ${method} ${path}`);
    let settled = false;
    let req;
    const hardTimer = setTimeout(() => req?.destroy(new Error(`Request exceeded hard timeout after ${timeoutMs}ms`)), timeoutMs);
    const finish = (result) => {
      if (settled) return;
      settled = true;
      clearTimeout(hardTimer);
      console.log(`RES ${method} ${path} ${result.statusCode || 'ERR'} ${result.durationMs}ms`);
      resolveRequest(result);
    };

    req = request(
      url,
      {
        method,
        rejectUnauthorized: process.env.LISGLOSIPS_REJECT_UNAUTHORIZED === '1',
        timeout: timeoutMs,
        headers,
      },
      (res) => {
        const chunks = [];
        res.on('data', (chunk) => chunks.push(chunk));
        res.on('end', () => {
          finish({
            path,
            method,
            ok: true,
            statusCode: res.statusCode || 0,
            durationMs: Date.now() - startedAt,
            contentType: String(res.headers['content-type'] || ''),
            body: Buffer.concat(chunks).toString('utf8'),
          });
        });
      }
    );

    req.setTimeout(timeoutMs, () => req.destroy(new Error(`Request timed out after ${timeoutMs}ms`)));
    req.on('error', (error) => {
      finish({ path, method, ok: false, statusCode: 0, durationMs: Date.now() - startedAt, contentType: '', body: '', error: error.message });
    });
    if (body) req.write(body);
    req.end();
  });
}

function parseJson(result) {
  try {
    return JSON.parse(result.body);
  } catch {
    return null;
  }
}

function decodeCaptcha(imageDataUrl) {
  const encoded = String(imageDataUrl || '').split(',', 2)[1];
  if (!encoded) return '';
  const svg = Buffer.from(encoded, 'base64').toString('utf8');
  return [...svg.matchAll(/<text\b[^>]*>([^<]+)<\/text>/g)].map((match) => match[1]).join('');
}

async function login(loginUsername, loginPassword) {
  const captcha = await requestApi('/api/v2/auth/captcha');
  const captchaBody = parseJson(captcha);
  const result = await requestApi('/api/v2/auth/login', {
    method: 'POST',
    body: { username: loginUsername, password: loginPassword, captchaId: captchaBody?.captchaId, captchaCode: decodeCaptcha(captchaBody?.imageDataUrl) },
  });
  return { result, body: parseJson(result) };
}

function check(name, pass, detail) {
  return { name, pass, detail };
}

function statusCheck(name, result, expectedStatus) {
  return check(name, result.ok && result.statusCode === expectedStatus, result.error || `status=${result.statusCode}, duration=${result.durationMs}ms`);
}

function reportLine(item) {
  return `| ${item.pass ? 'PASS' : 'FAIL'} | ${item.name} | ${String(item.detail).replace(/\|/g, '\\|')} |`;
}

function decimalLike(value) {
  return typeof value === 'string' && /^-?\d+\.\d{6}$/.test(value);
}

function cdrItemLooksSafe(item) {
  const text = JSON.stringify(item);
  return !/password|secret|token|ha1/i.test(text);
}

const checks = [];
const adminLogin = await login(username, password);
checks.push(statusCheck('admin can login', adminLogin.result, 200));
checks.push(check('admin login returns access token', typeof adminLogin.body?.accessToken === 'string', `tokenLength=${adminLogin.body?.accessToken?.length || 0}`));
const accessToken = adminLogin.body?.accessToken;

const lowLogin = await login(lowUsername, lowPassword);
checks.push(statusCheck('low-privilege user can login for RBAC checks', lowLogin.result, 200));

const lowCdrList = await requestApi('/api/v2/cdrs?take=1', { accessToken: lowLogin.body?.accessToken });
checks.push(statusCheck('low-privilege user cannot list CDRs', lowCdrList, 403));

const lowActiveCalls = await requestApi('/api/v2/active-calls', { accessToken: lowLogin.body?.accessToken });
checks.push(statusCheck('low-privilege user cannot list active calls', lowActiveCalls, 403));

const cdrList = await requestApi('/api/v2/cdrs?take=20', { accessToken });
const cdrListBody = parseJson(cdrList);
checks.push(statusCheck('CDR list can be queried', cdrList, 200));
checks.push(
  check(
    'CDR list returns page shape',
    Array.isArray(cdrListBody?.items) &&
      Number.isInteger(cdrListBody?.meta?.total) &&
      cdrListBody.meta.take === 20 &&
      cdrListBody.meta.skip === 0 &&
      typeof cdrListBody.meta.hasMore === 'boolean',
    `total=${cdrListBody?.meta?.total}, take=${cdrListBody?.meta?.take}, skip=${cdrListBody?.meta?.skip}, hasMore=${cdrListBody?.meta?.hasMore}`
  )
);
checks.push(check('CDR list items do not expose secrets', (cdrListBody?.items || []).every(cdrItemLooksSafe), `items=${cdrListBody?.items?.length || 0}`));

const firstCdr = cdrListBody?.items?.[0];
if (firstCdr) {
  const detail = await requestApi(`/api/v2/cdrs/${encodeURIComponent(firstCdr.id)}`, { accessToken });
  const detailBody = parseJson(detail);
  checks.push(statusCheck('CDR detail can be fetched', detail, 200));
  checks.push(check('CDR detail matches list item id and event id', detailBody?.id === firstCdr.id && detailBody?.eventId === firstCdr.eventId, `id=${detailBody?.id}, eventId=${detailBody?.eventId}`));
  checks.push(check('CDR detail does not expose secrets', cdrItemLooksSafe(detailBody), `id=${detailBody?.id}`));
  if (detailBody?.rated) {
    checks.push(
      check(
        'rated CDR detail has numeric fee fields',
        decimalLike(detailBody.rated.customerFee) && decimalLike(detailBody.rated.vendorCost) && decimalLike(detailBody.rated.grossProfit) && Number.isInteger(detailBody.rated.billSec),
        `billSec=${detailBody.rated.billSec}, customerFee=${detailBody.rated.customerFee}, vendorCost=${detailBody.rated.vendorCost}, grossProfit=${detailBody.rated.grossProfit}`
      )
    );
  } else {
    checks.push(check('unrated/skipped CDR detail has no rated fee payload', detailBody?.ratingStatus !== 'RATED', `ratingStatus=${detailBody?.ratingStatus}`));
  }

  const callerFilter = await requestApi(`/api/v2/cdrs?caller=${encodeURIComponent(firstCdr.caller)}&take=10`, { accessToken });
  const callerFilterBody = parseJson(callerFilter);
  checks.push(statusCheck('CDR caller filter can be queried', callerFilter, 200));
  checks.push(check('CDR caller filter returns matching rows', (callerFilterBody?.items || []).every((item) => String(item.caller).includes(firstCdr.caller)), `rows=${callerFilterBody?.items?.length || 0}, caller=${firstCdr.caller}`));

  if (firstCdr.calleeOperator) {
    const carrierFilter = await requestApi(`/api/v2/cdrs?carrier=${encodeURIComponent(firstCdr.calleeOperator)}&take=10`, { accessToken });
    const carrierFilterBody = parseJson(carrierFilter);
    checks.push(statusCheck('CDR carrier filter can be queried', carrierFilter, 200));
    checks.push(check('CDR carrier filter returns matching rows', (carrierFilterBody?.items || []).every((item) => item.calleeOperator === firstCdr.calleeOperator), `rows=${carrierFilterBody?.items?.length || 0}, carrier=${firstCdr.calleeOperator}`));
  }
} else {
  checks.push(check('CDR detail checks skipped because no CDR exists', true, 'No CDR rows returned by remote service.'));
}

const invalidCarrier = await requestApi('/api/v2/cdrs?carrier=BAD&take=10', { accessToken });
checks.push(statusCheck('invalid CDR carrier is rejected', invalidCarrier, 400));
checks.push(check('invalid carrier returns CARRIER_INVALID', parseJson(invalidCarrier)?.code === 'CARRIER_INVALID', `code=${parseJson(invalidCarrier)?.code || 'n/a'}`));

const invalidTake = await requestApi('/api/v2/cdrs?take=0', { accessToken });
checks.push(statusCheck('invalid CDR pagination is rejected', invalidTake, 400));
checks.push(check('invalid pagination returns QUERY_INVALID', parseJson(invalidTake)?.code === 'QUERY_INVALID', `code=${parseJson(invalidTake)?.code || 'n/a'}`));

const invalidTimeRange = await requestApi('/api/v2/cdrs?startedFrom=2026-01-02T00:00:00.000Z&startedTo=2026-01-01T00:00:00.000Z', { accessToken });
checks.push(statusCheck('invalid CDR time range is rejected', invalidTimeRange, 400));
checks.push(check('invalid time range returns TIME_RANGE_INVALID', parseJson(invalidTimeRange)?.code === 'TIME_RANGE_INVALID', `code=${parseJson(invalidTimeRange)?.code || 'n/a'}`));

const missingCdr = await requestApi('/api/v2/cdrs/not-a-real-cdr-id', { accessToken });
checks.push(statusCheck('missing CDR detail returns 404', missingCdr, 404));
checks.push(check('missing CDR returns CDR_NOT_FOUND', parseJson(missingCdr)?.code === 'CDR_NOT_FOUND', `code=${parseJson(missingCdr)?.code || 'n/a'}`));

const activeCalls = await requestApi('/api/v2/active-calls', { accessToken });
const activeCallsBody = parseJson(activeCalls);
checks.push(statusCheck('active calls list can be queried', activeCalls, 200));
checks.push(
  check(
    'active calls response has normalized shape',
    typeof activeCallsBody?.generatedAt === 'string' &&
      activeCallsBody?.source === 'opensips-mi' &&
      Number.isInteger(activeCallsBody?.total) &&
      Array.isArray(activeCallsBody?.items),
    `source=${activeCallsBody?.source}, total=${activeCallsBody?.total}`
  )
);

const invalidHangup = await requestApi(`/api/v2/active-calls/${encodeURIComponent('bad id!')}/hangup`, {
  method: 'POST',
  accessToken,
});
checks.push(statusCheck('invalid active call hangup id is rejected before MI call', invalidHangup, 400));
checks.push(check('invalid active call id returns ACTIVE_CALL_ID_INVALID', parseJson(invalidHangup)?.code === 'ACTIVE_CALL_ID_INVALID', `code=${parseJson(invalidHangup)?.code || 'n/a'}`));

const now = new Date();
const stamp = now.toISOString().replace(/[-:]/g, '').replace(/\..+$/, 'Z');
const reportPath = resolve(reportDir, `REMOTE_CALLS_CDR_BILLING_${stamp}.md`);
const failed = checks.filter((item) => !item.pass);
const report = [
  '# Remote SIP Calls, CDR, and Billing API Test Report',
  '',
  `Date: ${now.toISOString()}`,
  `Base URL: ${baseUrl}`,
  `Username: ${username}`,
  `Low-Privilege Username: ${lowUsername}`,
  '',
  '| Result | Check | Detail |',
  '| --- | --- | --- |',
  ...checks.map(reportLine),
  '',
  '## Not Executed By This Black-Box API Run',
  '',
  '- Real IP/SIP customer calls from T through A to UAS.',
  '- SIP Digest wrong-password REGISTER/INVITE signaling assertions.',
  '- Low-balance hot-path rejection assertions.',
  '- Primary/backup route failover proven by live call CDR vendorGatewayId.',
  '- Redis Stream CDR injection, duplicate event idempotency, deadletter, and retry/pending checks.',
  '- Direct customer balance deduction by CDR Worker transaction.',
  '',
  'These require A/B/T SIP tooling or Redis/DB side access in addition to the HTTPS API.',
  '',
].join('\n');

await mkdir(reportDir, { recursive: true });
await writeFile(reportPath, report, 'utf8');
for (const item of checks) {
  console.log(`${item.pass ? 'PASS' : 'FAIL'} ${item.name} - ${item.detail}`);
}
console.log(`Report: ${reportPath}`);
if (failed.length > 0) process.exitCode = 1;