$ErrorActionPreference = 'Stop'

function Assert-True {
  param(
    [bool]$Condition,
    [string]$Message
  )
  if (-not $Condition) { throw $Message }
}

Assert-True (Test-Path 'package.json') 'Missing package.json'
$pkg = Get-Content -Raw 'package.json' | ConvertFrom-Json
$build = $pkg.scripts.build
$dev = $pkg.scripts.dev
Assert-True (-not [string]::IsNullOrWhiteSpace($build)) 'Missing npm build script'
Assert-True (-not [string]::IsNullOrWhiteSpace($dev)) 'Missing npm dev script'

Assert-True (Test-Path 'tailwind.config.js') 'Missing tailwind.config.js'
Assert-True (Test-Path 'postcss.config.js') 'Missing postcss.config.js'

Assert-True (Test-Path 'assets/css/input.css') 'Missing assets/css/input.css'
$input = Get-Content -Raw 'assets/css/input.css'
Assert-True ($input -match '@tailwind base') 'Missing @tailwind base'
Assert-True ($input -match '@tailwind components') 'Missing @tailwind components'
Assert-True ($input -match '@tailwind utilities') 'Missing @tailwind utilities'

Assert-True (Test-Path 'assets/css/output.css') 'Missing assets/css/output.css'
$size = (Get-Item 'assets/css/output.css').Length
Assert-True ($size -lt 51200) "output.css too large: ${size} bytes"

'OK'