$ErrorActionPreference = "Stop"

$requiredFiles = @(
  "backend/package.json",
  "backend/tsconfig.json",
  "backend/.env.example",
  "backend/src/app.ts",
  "backend/src/config.ts",
  "backend/src/routes/health.ts",
  "backend/src/server.ts",
  "backend/tests/backend-contract.test.mjs",
  "deploy/pm2/ecosystem.config.cjs"
)

foreach ($path in $requiredFiles) {
  if (-not (Test-Path $path)) {
    throw "Required backend file missing: $path"
  }
}

& npm --prefix backend test
if ($LASTEXITCODE -ne 0) {
  throw "backend contract test failed"
}

Write-Host "PASS: backend M01-A skeleton check passed."