$repositoryRoot = (Resolve-Path (Join-Path $PSScriptRoot '..')).Path
$policyPath = Join-Path $repositoryRoot 'scripts\Set-SguLaboratorioWallpaperPolicy.ps1'
$policySource = Get-Content -LiteralPath $policyPath -Raw

Describe 'Laboratorio wallpaper policy packaging and scope' {
    It 'parses in Windows PowerShell and supports a read-only preview' {
        $tokens = $null
        $parseErrors = $null
        [Management.Automation.Language.Parser]::ParseFile($policyPath, [ref]$tokens, [ref]$parseErrors) | Out-Null
        $parseErrors.Count | Should Be 0
        $policySource | Should Match 'SupportsShouldProcess'
        $policySource | Should Match 'if \(-not \$PSCmdlet.ShouldProcess'
    }
    It 'scopes user settings through computer loopback Merge' {
        $policySource | Should Match "OU=Laboratorio,DC=lci,DC=lasalle,DC=mx"
        $policySource | Should Match "Name = 'UserPolicyMode'; Type = 'DWord'; Value = 1"
        $policySource | Should Match "Enforced = 'Yes'"
        $policySource | Should Match "LinkEnabled = 'Yes'"
    }
    It 'locks the generated per-user and per-computer wallpaper path' {
        $policySource | Should Match "Name = 'NoChangingWallPaper'; Type = 'DWord'; Value = 1"
        $policySource | Should Match ([regex]::Escape('%LOCALAPPDATA%\SGU\Wallpapers\welcome-%COMPUTERNAME%.jpg'))
        $policySource | Should Match "Name = 'Wallpaper'; Type = 'ExpandString'"
    }
    It 'reuses and backs up an existing GPO and verifies the result' {
        foreach ($command in @('Get-GPO', 'Backup-GPO', 'Set-GPLink', 'New-GPLink', 'Get-GPRegistryValue')) {
            $policySource | Should Match ([regex]::Escape($command))
        }
        $policySource | Should Match 'Wallpaper policy verification failed'
    }
    It 'ships in the server package and runs in server initialization' {
        foreach ($path in @('scripts\New-SguBootstrapPackages.ps1', 'scripts\Initialize-SguDomainController.ps1')) {
            (Get-Content (Join-Path $repositoryRoot $path) -Raw) |
                Should Match 'Set-SguLaboratorioWallpaperPolicy.ps1'
        }
    }
}