#!/usr/bin/env node
/**
 * GATE 0 — Repository structure and documentation presence.
 * Fails if required plan/docs/source paths are missing or empty.
 */

import { existsSync, statSync, readFileSync } from 'node:fs';
import { resolve, dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';

const root = resolve(dirname(fileURLToPath(import.meta.url)), '..');

/** @type {string[]} */
const requiredFiles = [
  'TODO.md',
  'README.md',
  'package.json',
  'docs/00-sources/provenance.md',
  'docs/00-sources/veraetime-openapi.yaml',
  'docs/01-product/features-a-m.md',
  'docs/01-product/billing-and-keys.md',
  'docs/02-architecture/overview.md',
  'docs/02-architecture/nats-subjects.md',
  'docs/02-architecture/composition.md',
  'docs/developer/debugging.md',
  'docs/developer/modules/README.md',
  'docs/developer/modules/debug.md',
  'docs/developer/modules/function-reference.md',
  'docs/plans/phase-gates.md',
  'packages/zappier/package.json',
  'packages/zappier/openapi.yaml',
  'packages/zappier/src/pricing.ts',
  'packages/verae-zapier-middleware/package.json',
  'packages/verae-zapier-middleware/src/debug/config.js',
  'packages/verae-zapier-middleware/src/debug/logger.js',
  'packages/verae-zapier-middleware/src/debug/redact.js',
  'packages/verae-zapier-middleware/src/debug/trace.js',
  'packages/verae-zapier-middleware/src/debug/index.js',
  'packages/verae-zapier-middleware/src/config.js',
  'packages/verae-zapier-middleware/src/errors.js',
  'packages/verae-zapier-middleware/src/app.js',
  'packages/verae-zapier-middleware/src/nats/subjects.js',
  'packages/verae-zapier-middleware/src/nats/connection.js',
  'packages/verae-zapier-middleware/src/nats/publishers.js',
  'packages/verae-zapier-middleware/src/workers/jobPollerWorker.js',
  'packages/verae-zapier-middleware/src/workers/webhookWorker.js',
  'packages/verae-zapier-middleware/test/unit/debug.test.js',
  'packages/verae-zapier/index.js',
  'packages/verae-zapier/authentication.js',
  'vendor/zapier-platform/package.json',
  'research/README.md',
  'research/zapier/README.md',
  'research/zapier/getting-started.md',
  'research/zapier/PLATFORM-REFERENCE.md',
  'research/zapier/VENDOR-RESEARCH.md',
];

/** @type {string[]} */
const requiredDirs = [
  'docs/developer/modules',
  'packages/zappier/src',
  'packages/zappier/admin',
  'packages/zappier/portal',
  'packages/verae-zapier-middleware/src/debug',
  'packages/verae-zapier-middleware/src/nats',
  'packages/verae-zapier-middleware/src/workers',
  'packages/verae-zapier',
  'vendor/zapier-platform',
  'harness',
  'research/zapier/raw',
  'research/zapier/repos',
  'research/zapier/docs/diagrams',
  'research/zapier/profiles',
  'research/zapier/scratch/veraetime',
];

let failed = false;

function fail(msg) {
  console.error(`FAIL: ${msg}`);
  failed = true;
}

function ok(msg) {
  console.log(`OK:   ${msg}`);
}

for (const rel of requiredDirs) {
  const p = join(root, rel);
  if (!existsSync(p) || !statSync(p).isDirectory()) {
    fail(`missing directory ${rel}`);
  } else {
    ok(`dir ${rel}`);
  }
}

for (const rel of requiredFiles) {
  const p = join(root, rel);
  if (!existsSync(p) || !statSync(p).isFile()) {
    fail(`missing file ${rel}`);
    continue;
  }
  const size = statSync(p).size;
  if (size < 40) {
    fail(`file too small (${size}b): ${rel}`);
  } else {
    ok(`file ${rel} (${size}b)`);
  }
}

const todo = readFileSync(join(root, 'TODO.md'), 'utf8');
for (const needle of ['GATE 0', 'NATS', 'DEBUG_VERAE', 'gate:all', 'api.veraetime.net']) {
  if (!todo.includes(needle)) {
    fail(`TODO.md missing required term: ${needle}`);
  } else {
    ok(`TODO.md contains "${needle}"`);
  }
}

if (failed) {
  console.error('\nGATE 0 FAILED');
  process.exit(1);
}

console.log('\nGATE 0 PASSED');
process.exit(0);