param(
    [string]$ProjectRoot = (Split-Path -Parent $PSScriptRoot)
)

$ErrorActionPreference = 'Stop'
$violations = [System.Collections.Generic.List[string]]::new()

function Add-Matches {
    param(
        [string]$Label,
        [string]$Pattern,
        [string]$Path
    )

    $matches = & rg --line-number --glob '*.cs' $Pattern $Path 2>$null
    if ($LASTEXITCODE -eq 0) {
        foreach ($match in $matches) {
            $violations.Add("${Label}: ${match}")
        }
    }
    elseif ($LASTEXITCODE -ne 1) {
        throw "Architecture scan failed while checking ${Label}."
    }
}

Add-Matches `
    -Label 'Service database dependency' `
    -Pattern 'AppDBContext|Microsoft\.EntityFrameworkCore|GetRequiredService<AppDBContext>' `
    -Path (Join-Path $ProjectRoot 'Services')

Add-Matches `
    -Label 'Controller repository dependency' `
    -Pattern 'I[A-Za-z0-9]+Repo(sitory)?\b' `
    -Path (Join-Path $ProjectRoot 'Controllers')

Add-Matches `
    -Label 'Repository upward dependency or commit' `
    -Pattern 'Interfaces\.Services|I[A-Za-z0-9]+Service\b|IUnitOfWork|HttpContext|SaveChangesAsync\(' `
    -Path (Join-Path $ProjectRoot 'Repos')

if ($violations.Count -gt 0) {
    Write-Error ("Layering violations found:`n" + ($violations -join "`n"))
    exit 1
}

Write-Output 'Layering check passed: Controller -> Service -> Repository -> AppDBContext.'