#!/usr/bin/env node
/**
 * Run from modstagram-back root on the server:
 *   node scripts/verify-backend.js
 */
const fs = require('fs')
const path = require('path')
const { execSync } = require('child_process')

const root = path.join(__dirname, '..')
let failed = false

function fail (message) {
  console.error('FAIL:', message)
  failed = true
}

function ok (message) {
  console.log('OK:', message)
}

function walkJs (dir, out = []) {
  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
    if (entry.name === 'node_modules' || entry.name === 'dist') continue
    const full = path.join(dir, entry.name)
    if (entry.isDirectory()) walkJs(full, out)
    else if (entry.name.endsWith('.js')) out.push(full)
  }
  return out
}

console.log('Checking merge conflicts...')
const conflictPattern = /^<<<<<<<|^=======|^>>>>>>>/
for (const file of walkJs(root)) {
  const firstLines = fs.readFileSync(file, 'utf8').split('\n').slice(0, 3)
  if (firstLines.some((line) => conflictPattern.test(line.trim()))) {
    fail(`merge conflict marker in ${path.relative(root, file)}`)
  }
}
if (!failed) ok('no merge conflict markers')

console.log('Syntax check...')
const critical = [
  'index.js',
  'routes/index.js',
  'controllers/application/users/getUserController.js',
  'controllers/application/projects/getProjectController.js',
  'controllers/application/stories/storyController.js',
  'controllers/panel/projects/projectController.js'
]
for (const rel of critical) {
  try {
    execSync(`node --check "${path.join(root, rel)}"`, { stdio: 'pipe' })
    ok(rel)
  } catch {
    fail(`syntax error in ${rel}`)
  }
}

console.log('Loading routes...')
try {
  process.chdir(root)
  require('../routes/index.js')
  ok('routes/index.js loaded')
} catch (error) {
  fail(`routes load: ${error.message}`)
}

console.log('Loading getUserController...')
try {
  const mod = require('../controllers/application/users/getUserController.js')
  if (typeof mod.getPostsWeb !== 'function') {
    fail('getPostsWeb export missing')
  } else {
    ok('getPostsWeb export')
  }
} catch (error) {
  fail(`getUserController: ${error.message}`)
}

if (failed) {
  console.error('\nBackend verification FAILED')
  process.exit(1)
}

console.log('\nBackend verification PASSED')
process.exit(0)