import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const FN_URL = process.env.SMOKE_FN_URL || 'https://server.fmode.cn/api/functions';
const APP_ID = process.env.SMOKE_PARSE_APP_ID || 'ncloudmaster';
const SESSION_TOKEN = process.env.SMOKE_SESSION_TOKEN || '';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const rootDir = path.resolve(__dirname, '..', '..');
const cloudFunctionsPath = path.join(rootDir, 'src', 'app', 'services', 'cloud-functions.ts');
const fn = readCloudFunctionIds(cloudFunctionsPath);

const probeType = 'governanceProbe';
const probeId = `parse-storage-${Date.now()}`;
const errors = [];
let probeAssetId = '';

if (!SESSION_TOKEN) {
  fail('Missing SMOKE_SESSION_TOKEN. Provide one test user Parse session token.');
}
for (const key of ['systemStorage', 'upload', 'fileAsset', 'authCredit']) {
  if (!fn[key]) fail(`CLOUD_FN.${key} is empty. Deploy and fill src/app/services/cloud-functions.ts before running validation.`);
}
if (errors.length) exitWithErrors();

try {
  await run('authCredit.balance keeps APIG reachable', async () => {
    const result = await call(fn.authCredit, { action: 'balance' });
    assertOk(result, 'authCredit.balance should succeed');
    assert(result?.data?.apigId === '6pFf6EAdKT', `APIG id must stay 6pFf6EAdKT: ${summarize(result)}`);
    assert(Number.isFinite(Number(result?.data?.balance)), 'authCredit.balance must return numeric balance');
  });

  await run('systemStorage writes VideoWorkflowEntity', async () => {
    const upsert = await call(fn.systemStorage, {
      action: 'upsert',
      entityType: probeType,
      entityId: probeId,
      status: 'active',
      data: {
        marker: probeId,
        source: 'parse-storage-postdeploy',
      },
    });
    assertOk(upsert, 'systemStorage.upsert should succeed');
    assert(upsert?.data?.data?.marker === probeId, `systemStorage.upsert should return probe payload: ${summarize(upsert)}`);
  });

  await run('systemStorage reads VideoWorkflowEntity', async () => {
    const get = await call(fn.systemStorage, { action: 'get', entityType: probeType, entityId: probeId });
    assertOk(get, 'systemStorage.get should succeed');
    assert(get?.data?.data?.marker === probeId, `systemStorage.get should return the probe payload: ${summarize(get)}`);
  });

  await run('systemStorage writes VideoWorkflowAudit detail string', async () => {
    const audit = await call(fn.systemStorage, {
      action: 'audit',
      auditAction: 'parse-storage-postdeploy',
      entityType: probeType,
      entityId: probeId,
      summary: 'Parse storage postdeploy probe',
      detail: { marker: probeId },
    });
    assertOk(audit, 'systemStorage.audit should succeed');
    assert(audit?.data?.detail?.marker === probeId, `systemStorage.audit should return parsed detail: ${summarize(audit)}`);
  });

  await run('upload issues user-partition qiniu key', async () => {
    const upload = await call(fn.upload, {
      action: 'createUploadToken',
      filename: 'parse-storage-postdeploy-probe.txt',
      mimeType: 'text/plain',
      kind: 'probe',
      bizId: probeId,
    });
    assertOk(upload, 'upload.createUploadToken should succeed');
    const qiniuKey = String(upload?.data?.key || '');
    assert(qiniuKey.startsWith('users/'), `upload key must start with users/: ${summarize(upload)}`);

    const registered = await call(fn.fileAsset, {
      action: 'register',
      qiniuKey,
      url: upload?.data?.url || '',
      bucket: upload?.data?.bucket || 'nova-repos',
      mimeType: 'text/plain',
      kind: 'export',
      sizeBytes: 0,
      sourceModule: 'parse-storage-postdeploy',
      bizType: probeType,
      bizId: probeId,
      metadata: { marker: probeId },
    });
    assertOk(registered, 'fileAsset.register should succeed');
    probeAssetId = String(registered?.data?.assetId || registered?.data?.id || '');
    assert(probeAssetId, `fileAsset.register must return assetId: ${summarize(registered)}`);
    assert(registered?.data?.qiniuKey === qiniuKey, `fileAsset.register must preserve qiniuKey: ${summarize(registered)}`);
  });

  await run('fileAsset reads VideoWorkflowFileAsset', async () => {
    const get = await call(fn.fileAsset, { action: 'get', assetId: probeAssetId });
    assertOk(get, 'fileAsset.get should succeed');
    assert(get?.data?.metadata?.marker === probeId, `fileAsset.get should return probe metadata: ${summarize(get)}`);
  });
} finally {
  if (probeAssetId) {
    await run('cleanup VideoWorkflowFileAsset', async () => {
      const deleted = await call(fn.fileAsset, { action: 'delete', assetId: probeAssetId });
      assertOk(deleted, 'fileAsset.delete cleanup should succeed');
    });
  }
  await run('cleanup VideoWorkflowEntity', async () => {
    const deleted = await call(fn.systemStorage, { action: 'delete', entityType: probeType, entityId: probeId });
    assertOk(deleted, 'systemStorage.delete cleanup should succeed');
  });
}

if (errors.length) exitWithErrors();
console.log('Parse storage postdeploy validation passed');

async function run(name, task) {
  try {
    await task();
    console.log(`OK ${name}`);
  } catch (error) {
    errors.push(`${name}: ${error?.message || error}`);
    console.error(`FAIL ${name}: ${error?.message || error}`);
  }
}

async function call(id, body) {
  let lastResult = null;
  let lastError = null;
  for (let attempt = 1; attempt <= 4; attempt += 1) {
    try {
      const response = await fetch(FN_URL, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'X-Parse-Application-Id': APP_ID,
        },
        body: JSON.stringify({ id, _ApplicationId: APP_ID, sessionToken: SESSION_TOKEN, ...body }),
      });
      const text = await response.text();
      let result;
      try {
        result = JSON.parse(text);
      } catch {
        result = { code: response.status, success: false, error: text };
      }
      lastResult = result;
      if (attempt < 4 && isRetryableResult(result)) {
        await sleep(600 * attempt);
        continue;
      }
      return result;
    } catch (error) {
      lastError = error;
      if (attempt < 4 && isRetryableMessage(error?.message || '')) {
        await sleep(600 * attempt);
        continue;
      }
      throw error;
    }
  }
  if (lastResult) return lastResult;
  throw lastError || new Error('fetch failed');
}

function assertOk(result, message) {
  assert(Number(result?.code || 0) === 200 && result?.success !== false, `${message}: ${summarize(result)}`);
}

function assert(condition, message) {
  if (!condition) throw new Error(message);
}

function fail(message) {
  errors.push(message);
}

function exitWithErrors() {
  for (const error of errors) console.error(`FAIL ${error}`);
  process.exit(1);
}

function summarize(result) {
  return JSON.stringify(result, (key, value) => key === 'token' ? '<redacted>' : value).slice(0, 700);
}

function isRetryableResult(result) {
  const message = `${result?.error || ''} ${result?.message || ''}`;
  return Number(result?.code || 0) >= 500 || isRetryableMessage(message);
}

function isRetryableMessage(message) {
  return /fetch failed|Failed to fetch|NetworkError|Load failed|ECONNRESET|ETIMEDOUT|EAI_AGAIN/i.test(message || '');
}

function sleep(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

function readCloudFunctionIds(filePath) {
  const text = fs.readFileSync(filePath, 'utf8');
  const ids = {};
  const pattern = /^\s*([a-zA-Z][a-zA-Z0-9_]*)\s*:\s*'([^']*)'/gm;
  let match;
  while ((match = pattern.exec(text))) {
    ids[match[1]] = match[2];
  }
  return ids;
}