import fs from 'node:fs';
import path from 'node:path';

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 CONFIRM_TEXT = 'SOFT_DELETE_IP_OPERATOR_CANDIDATES';
const CONFIRM = readArg('--confirm') || process.env.IP_CLEANUP_CONFIRM || '';
const INPUT = readArg('--input') || process.env.IP_CLEANUP_REPORT || '';
const CONCURRENCY = clamp(Number(process.env.IP_CLEANUP_CONCURRENCY || readArg('--concurrency') || 3), 1, 5);
const OUTPUT_DIR = process.env.IP_CLEANUP_OUTPUT_DIR
  ? path.resolve(process.env.IP_CLEANUP_OUTPUT_DIR)
  : path.join(process.cwd(), 'tmp');

const allowedEntityTypes = new Set([
  'ipOperator.accountSnapshot',
  'ipOperator.accountSnapshotWork',
  'ipOperator.accountSnapshotComment',
  'ipOperator.planEvidenceItem',
  'ipOperator.planCommentPainInsight',
]);

const protectedEntityTypes = new Set([
  'ipOperator.account',
  'ipOperator.profile',
  'ipOperator.plan',
]);

if (!SESSION_TOKEN) {
  console.error('Missing SMOKE_SESSION_TOKEN. Refusing to modify cloud data.');
  process.exit(1);
}
if (!INPUT) {
  console.error('Missing --input <dry-run-report.json> or IP_CLEANUP_REPORT.');
  process.exit(1);
}

const inputPath = path.resolve(INPUT);
const report = JSON.parse(fs.readFileSync(inputPath, 'utf8'));
const candidates = Array.isArray(report.candidates) ? report.candidates : [];
const activeTargets = [];
const skipped = [];

for (const row of candidates) {
  const entityType = String(row.entityType || '');
  const entityId = String(row.entityId || '');
  const status = String(row.status || 'active');
  if (!entityType || !entityId) {
    skipped.push({ ...row, skippedReason: 'missing entityType/entityId' });
    continue;
  }
  if (protectedEntityTypes.has(entityType)) {
    skipped.push({ ...row, skippedReason: 'protected entity type' });
    continue;
  }
  if (!allowedEntityTypes.has(entityType)) {
    skipped.push({ ...row, skippedReason: 'not in cleanup allowlist' });
    continue;
  }
  if (status !== 'active') {
    skipped.push({ ...row, skippedReason: `status is ${status}; soft delete not needed` });
    continue;
  }
  activeTargets.push({
    accountId: row.accountId || '',
    entityType,
    entityId,
    reason: row.reason || '',
    status,
  });
}

console.log(`IP operator soft cleanup input=${inputPath}`);
console.log(`dryRunGeneratedAt=${report.generatedAt || '(unknown)'}`);
console.log(`candidateRows=${candidates.length}`);
console.log(`activeTargets=${activeTargets.length}`);
console.log(`skipped=${skipped.length}`);
console.log(`concurrency=${CONCURRENCY}`);
console.log('');

if (CONFIRM !== CONFIRM_TEXT) {
  console.log('No cleanup executed.');
  console.log(`To execute soft delete, rerun with: --confirm ${CONFIRM_TEXT}`);
  console.log('This will call systemStorage.delete for active allowlisted candidate rows only.');
  process.exit(2);
}

const cloudFunctionsPath = path.join(process.cwd(), 'src', 'app', 'services', 'cloud-functions.ts');
const fn = readCloudFunctionIds(cloudFunctionsPath);
if (!fn.systemStorage) {
  console.error('CLOUD_FN.systemStorage is empty. Check src/app/services/cloud-functions.ts.');
  process.exit(1);
}

const startedAt = new Date().toISOString();
const results = [];
let index = 0;

await Promise.all(Array.from({ length: CONCURRENCY }, async () => {
  while (index < activeTargets.length) {
    const currentIndex = index;
    index += 1;
    const target = activeTargets[currentIndex];
    const result = await softDelete(target);
    results[currentIndex] = result;
    if ((currentIndex + 1) % 50 === 0 || currentIndex + 1 === activeTargets.length) {
      console.log(`progress ${currentIndex + 1}/${activeTargets.length}`);
    }
  }
}));

const completedAt = new Date().toISOString();
const failures = results.filter((item) => !item.ok);
const successCount = results.length - failures.length;
const output = {
  startedAt,
  completedAt,
  inputPath,
  dryRunGeneratedAt: report.generatedAt || '',
  activeTargets: activeTargets.length,
  successCount,
  failureCount: failures.length,
  skippedCount: skipped.length,
  skipped,
  failures,
  results,
};

fs.mkdirSync(OUTPUT_DIR, { recursive: true });
const outputPath = path.join(OUTPUT_DIR, `ip-operator-cleanup-soft-delete-${safeTimestamp(completedAt)}.json`);
fs.writeFileSync(outputPath, `${JSON.stringify(output, null, 2)}\n`, 'utf8');

console.log('');
console.log(`Soft cleanup complete. success=${successCount} failures=${failures.length} skipped=${skipped.length}`);
console.log(`Result report: ${outputPath}`);
if (failures.length) process.exit(1);

async function softDelete(target) {
  const result = await call(fn.systemStorage, {
    action: 'delete',
    entityType: target.entityType,
    entityId: target.entityId,
  });
  const ok = Number(result?.code || 0) === 200 && result?.success !== false;
  return {
    ...target,
    ok,
    responseCode: result?.code,
    error: ok ? '' : result?.error || result?.message || JSON.stringify(result).slice(0, 500),
  };
}

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;
      const message = `${error?.message || ''} ${error?.cause?.code || ''}`;
      if (attempt < 4 && isRetryableMessage(message)) {
        await sleep(600 * attempt);
        continue;
      }
      return { code: 500, success: false, error: error?.message || 'fetch failed' };
    }
  }
  if (lastResult) return lastResult;
  return { code: 500, success: false, error: lastError?.message || 'fetch failed' };
}

function readArg(name) {
  const index = process.argv.indexOf(name);
  return index >= 0 ? process.argv[index + 1] || '' : '';
}

function readCloudFunctionIds(filePath) {
  const text = fs.readFileSync(filePath, 'utf8');
  const ids = {};
  const re = /(\w+):\s*'([^']*)'/g;
  let match;
  while ((match = re.exec(text))) ids[match[1]] = match[2];
  return ids;
}

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 clamp(value, min, max) {
  if (!Number.isFinite(value)) return min;
  return Math.max(min, Math.min(max, Math.floor(value)));
}

function safeTimestamp(value) {
  return String(value).replace(/[:.]/g, '-');
}