import test from 'node:test';
import assert from 'node:assert/strict';
import { readFile, readdir, stat } from 'node:fs/promises';
import { createHash } from 'node:crypto';
import path from 'node:path';
import { upstream58e2204Operations } from '../../operation-registry/src/upstream-58e2204.ts';
import {
  collectOne,
  selectReadonlyOperations,
  validateReadonlyOperation,
  DENY_REASONS,
} from '../scripts/collector.ts';
import { redact } from '../src/redactor.ts';
import {
  payloadShape,
  validateShapeNode,
  validateSensitivePayload,
  validateStatusContract,
} from '../src/verifier.ts';

const root = path.resolve(import.meta.dirname, '..');
const fixtureRoot = path.join(root, 'src/simadmin');
const allowedEnvelope = [
  'schemaVersion',
  'upstreamBaseline',
  'capturedAt',
  'sourceInstanceAlias',
  'operationId',
  'method',
  'pathTemplate',
  'statusCategory',
  'httpStatus',
  'contentType',
  'latencyBucket',
  'redacted',
  'payload',
];
// Preserve business-schema keys such as `url` and channel `headers`; sensitive values
// are typed-redacted. The exact top-level envelope already excludes transport metadata.
const forbiddenKeys = /^(raw(response)?|instance(id|name))$/i;
const DENIED_PATHS = new Set(Object.keys(DENY_REASONS));
const leakPatterns = [
  /https?:\/\//i,
  /\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b/i,
  /\b(?:\d{1,3}\.){3}\d{1,3}\b/,
  /(?:[0-9a-f]{2}:){5}[0-9a-f]{2}/i,
  /\+?\d(?:[ ()-]*\d){9,14}/,
  /\b\d{14,22}\b/,
  /\b(?:bearer\s+)?[A-Za-z0-9_-]{32,}\b/i,
];

async function jsonFiles(dir: string): Promise<string[]> {
  const out: string[] = [];
  for (const e of await readdir(dir, { withFileTypes: true })) {
    const p = path.join(dir, e.name);
    if (e.isDirectory()) out.push(...(await jsonFiles(p)));
    else if (e.name.endsWith('.json')) out.push(p);
  }
  return out;
}
function walkKeys(v: any, cb: (k: string) => void) {
  if (Array.isArray(v)) return v.forEach((x) => walkKeys(x, cb));
  if (v && typeof v === 'object')
    for (const [k, x] of Object.entries(v)) {
      cb(k);
      walkKeys(x, cb);
    }
}
function stringLeaves(v: any, out: string[] = []) {
  if (Array.isArray(v)) v.forEach((x) => stringLeaves(x, out));
  else if (v && typeof v === 'object') Object.values(v).forEach((x) => stringLeaves(x, out));
  else if (typeof v === 'string' && v.length >= 3) out.push(v);
  return out;
}

test('selector is registry-derived passive GET R0 only with explicit denials', () => {
  const { selected, denied } = selectReadonlyOperations(upstream58e2204Operations);
  assert.ok(selected.length > 20);
  assert.ok(
    denied.some((x: any) => x.pathTemplate === '/api/network/operators/scan' && x.denyReason),
  );
  for (const op of selected) {
    assert.equal(op.method, 'GET');
    assert.equal(op.riskLevel, 'R0');
    assert.doesNotMatch(op.pathTemplate, /[{}]/);
    assert.notEqual(op.pathTemplate, '/api/network/operators/scan');
  }
});

test('collector source has no write-method or authentication escape hatch', async () => {
  const source = await readFile(path.join(root, 'scripts/collect-readonly-fixtures.ts'), 'utf8');
  assert.doesNotMatch(source, /ensureAuthenticated|login\s*\(|--method|--path|--origin/i);
  assert.doesNotMatch(source, /['"](?:POST|PUT|PATCH|DELETE)['"]/);
});

test('transport can only receive credential-free GET, manual redirect and timeout', async () => {
  let init: any;
  const fake = async (_url: any, i: any) => {
    init = i;
    return new Response(
      JSON.stringify({ phone: '+15551234567', message: 'private', ip: '10.1.2.3' }),
      { status: 200, headers: { 'content-type': 'application/json', 'set-cookie': 'bad=1' } },
    );
  };
  const op = upstream58e2204Operations.find((x) => x.operationId === 'getHealth')!;
  const f = await collectOne(
    { origin: 'http://192.168.1.2', alias: 'instance-1' },
    op,
    fake as any,
  );
  assert.deepEqual(
    {
      method: init.method,
      body: init.body,
      redirect: init.redirect,
      credentials: init.credentials,
    },
    { method: 'GET', body: undefined, redirect: 'manual', credentials: 'omit' },
  );
  assert.deepEqual(init.headers, { accept: 'application/json' });
  assert.ok(init.signal);
  assert.equal(f.payload.phone, '[REDACTED]');
  assert.equal(f.payload.message, 'private');
  assert.equal(f.payload.ip, '[REDACTED]');
});

test('redactor covers sensitive keys and value patterns deterministically', () => {
  const x = redact({
    password: 'p',
    TOKEN: 't',
    content: 'body',
    phone: 'x',
    other: [
      '+155****4567',
      '+155****4567',
      'a@b.example',
      'https://private.example/x',
      'aa:bb:cc:dd:ee:ff',
      '2001:db8::1',
    ],
  });
  assert.equal(x.password, '[REDACTED]');
  assert.equal(x.TOKEN, '[REDACTED]');
  assert.equal(x.content, '[REDACTED]');
  assert.equal(x.phone, '[REDACTED]');
  for (const p of leakPatterns) assert.doesNotMatch(JSON.stringify(x), p);
});

test('Registry operation identity also rejects in-place structural mutation', () => {
  const op: any = upstream58e2204Operations.find((x) => x.operationId === 'getHealth')!;
  const original = structuredClone(op);
  const mutations = [
    (x: any) => x.sensitiveFields.push({ direction: 'response', path: '$.response.data.secret' }),
    (x: any) => {
      delete x.pathTemplate;
    },
    (x: any) => {
      x.method = 'POST';
    },
    (x: any) => {
      x.sensitiveFields = 'changed';
    },
  ];
  for (const mutate of mutations) {
    try {
      mutate(op);
      assert.throws(() => validateReadonlyOperation(op), /Registry integrity/);
    } finally {
      for (const key of Object.keys(op)) delete op[key];
      Object.assign(op, structuredClone(original));
    }
  }
  validateReadonlyOperation(op);
});

test('collector categorizes status and JSON parse outcomes consistently', async () => {
  const op = upstream58e2204Operations.find((x) => x.operationId === 'getHealth')!;
  const run = (status: number, type: string, body: string | null) =>
    collectOne(
      { origin: 'http://192.168.1.2', alias: 'instance-1' },
      op,
      async () => new Response(body, { status, headers: { 'content-type': type } }),
    );
  for (const [status, type, body, category] of [
    [200, 'application/problem+json', '{}', 'success'],
    [200, 'application/json', 'bad', 'non-json'],
    [204, 'text/plain', null, 'non-json'],
    [401, 'application/json', '{}', 'auth-required'],
    [405, 'application/json', '{}', 'unsupported'],
    [500, 'application/json', '{}', 'http-error'],
  ] as const) {
    const f = await run(status, type, body);
    assert.equal(f.statusCategory, category);
    validateStatusContract(f);
  }
  const redirect = await run(302, 'application/json', '{}');
  assert.equal(redirect.statusCategory, 'http-error');
  validateStatusContract(redirect);
  assert.throws(() =>
    validateStatusContract({
      statusCategory: 'success',
      httpStatus: 401,
      contentType: 'application/json',
      payload: {},
      latencyBucket: '<250ms',
    }),
  );
});

test('real fixtures satisfy envelope, registry, leak scan, and manifest integrity', async () => {
  const manifest = JSON.parse(await readFile(path.join(root, 'src/manifest.json'), 'utf8'));
  assert.deepEqual(Object.keys(manifest).sort(), [
    'domainCoverage',
    'files',
    'realFixtureCount',
    'schemaVersion',
    'shapeBaseline',
    'syntheticFixtureCount',
    'upstreamBaseline',
  ]);
  const files = (await jsonFiles(fixtureRoot)).filter((x) => !x.includes('/synthetic-errors/'));
  const srcEntries = await readdir(path.join(root, 'src'));
  assert.ok(!srcEntries.includes('synthetic-errors'));
  const config = JSON.parse(await readFile(path.resolve(root, '../../config.json'), 'utf8'));
  const privateValues = stringLeaves(config);
  const expected = selectReadonlyOperations(upstream58e2204Operations).selected;
  assert.equal(files.length, expected.length * 2);
  assert.equal(manifest.realFixtureCount, files.length);
  assert.equal(manifest.syntheticFixtureCount, 0);
  assert.equal(manifest.schemaVersion, 1);
  assert.equal(manifest.upstreamBaseline, '58e2204');
  const shapePath = path.join(root, 'src/response-shapes-58e2204.json');
  const shapeText = await readFile(shapePath, 'utf8');
  const shapeBaseline = JSON.parse(shapeText);
  assert.deepEqual(Object.keys(shapeBaseline).sort(), [
    'schemaVersion',
    'shapes',
    'upstreamBaseline',
  ]);
  assert.equal(shapeBaseline.schemaVersion, 1);
  assert.equal(shapeBaseline.upstreamBaseline, '58e2204');
  assert.equal(Object.keys(shapeBaseline.shapes).length, 78);
  assert.deepEqual(Object.keys(manifest.shapeBaseline).sort(), ['path', 'sha256', 'size']);
  assert.equal(manifest.shapeBaseline.path, 'src/response-shapes-58e2204.json');
  assert.equal(manifest.shapeBaseline.size, (await stat(shapePath)).size);
  assert.equal(manifest.shapeBaseline.sha256, createHash('sha256').update(shapeText).digest('hex'));
  assert.ok(!manifest.files.some((x: any) => x.path === manifest.shapeBaseline.path));
  for (const node of Object.values(shapeBaseline.shapes)) validateShapeNode(node);
  const registry = new Map(upstream58e2204Operations.map((x) => [x.operationId, x]));
  const domains = new Map<string, number>();
  const pairs = new Set<string>();
  const disk = files.map((file) => path.relative(root, file)).sort();
  const listed = manifest.files.map((x: any) => x.path).sort();
  assert.deepEqual(listed, disk);
  assert.equal(new Set(listed).size, listed.length);
  for (const file of files) {
    const text = await readFile(file, 'utf8');
    const f = JSON.parse(text);
    assert.deepEqual(Object.keys(f).sort(), [...allowedEnvelope].sort());
    assert.equal(f.schemaVersion, 1);
    assert.equal(f.upstreamBaseline, '58e2204');
    assert.match(f.capturedAt, /^20(?:2[4-9]|[3-9]\d)-\d{2}-\d{2}$/);
    assert.ok(!Number.isNaN(Date.parse(`${f.capturedAt}T00:00:00Z`)));
    assert.ok(['instance-1', 'instance-2'].includes(f.sourceInstanceAlias));
    assert.equal(f.redacted, true);
    assert.equal(f.method, 'GET');
    assert.ok(!('synthetic' in f));
    assert.ok(
      [
        'success',
        'non-json',
        'auth-required',
        'unsupported',
        'http-error',
        'timeout',
        'network-error',
      ].includes(f.statusCategory),
    );
    if (['timeout', 'network-error'].includes(f.statusCategory)) assert.equal(f.httpStatus, null);
    else assert.ok(Number.isInteger(f.httpStatus));
    const op: any = registry.get(f.operationId);
    assert.ok(op);
    validateStatusContract(f);
    validateSensitivePayload(f.payload, op);
    const shapeKey = `${f.sourceInstanceAlias}::${f.operationId}`;
    assert.deepEqual(payloadShape(f.payload), shapeBaseline.shapes[shapeKey]);
    assert.equal(op?.riskLevel, 'R0');
    assert.equal(op?.method, 'GET');
    assert.equal(op?.pathTemplate, f.pathTemplate);
    assert.ok(!DENIED_PATHS.has(f.pathTemplate));
    domains.set(op.upstreamDomain, (domains.get(op.upstreamDomain) || 0) + 1);
    const pair = `${f.sourceInstanceAlias}:${f.operationId}`;
    assert.ok(!pairs.has(pair));
    pairs.add(pair);
    walkKeys(f, (k) => assert.doesNotMatch(k, forbiddenKeys));
    for (const p of leakPatterns) assert.doesNotMatch(text, p);
    for (const value of privateValues)
      assert.ok(!text.includes(value), 'fixture contains configured value');
    const rel = path.relative(root, file);
    const m = manifest.files.find((x: any) => x.path === rel);
    assert.ok(m);
    assert.equal(m.size, (await stat(file)).size);
    assert.match(m.sha256, /^[a-f0-9]{64}$/);
    assert.equal(m.sha256, createHash('sha256').update(text).digest('hex'));
  }
  assert.deepEqual(Object.fromEntries([...domains].sort()), manifest.domainCoverage);
  assert.deepEqual(
    Object.keys(shapeBaseline.shapes).sort(),
    [...pairs].map((x) => x.replace(':', '::')).sort(),
  );
  assert.deepEqual(
    [...pairs].sort(),
    expected
      .flatMap((op: any) =>
        ['instance-1', 'instance-2'].map((alias) => `${alias}:${op.operationId}`),
      )
      .sort(),
  );
});