# deposit_tree_lot3_blocking_fix_v1.0.ps1
param(
  [string]$Root="\\DS-918\chatgpt\ChatGPT-Gouvernance-Projets\_registry",
  [string]$InDir="C:\GovDrop\incoming\lot3",
  [switch]$Preview,
  [switch]$Execute
)
if($Preview -and $Execute){ Write-Host "[NOK] -Preview et -Execute exclusifs."; exit 1 }
if(-not $Preview -and -not $Execute){ $Preview = $true }
function NowIso(){ (Get-Date).ToString("yyyyMMdd_HHmmss") }
function Ensure-Parent([string]$p){ $parent=[IO.Path]::GetDirectoryName($p); if(-not [string]::IsNullOrWhiteSpace($parent)){ [void][IO.Directory]::CreateDirectory($parent) } }
function Sha([string]$p){ if(Test-Path -LiteralPath $p){ (Get-FileHash -LiteralPath $p -Algorithm SHA256).Hash } else { "" } }
if(-not (Test-Path -LiteralPath $InDir)){ Write-Host ("[NOK] InDir introuvable : {0}" -f $InDir); exit 2 }
$ts = NowIso
$files = Get-ChildItem -LiteralPath $InDir -Recurse -File -ErrorAction SilentlyContinue | Sort-Object FullName
$plan = @(); foreach($f in $files){ $rel=$f.FullName.Substring($InDir.Length).TrimStart('\','/'); $dst=Join-Path -Path $Root -ChildPath $rel; $tmp=Join-Path -Path (Join-Path -Path $Root -ChildPath "__tmp_tree") -ChildPath $rel; $plan += [pscustomobject]@{ Src=$f.FullName; Rel=$rel; Tmp=$tmp; Dst=$dst } }
Write-Host ("== PREVIEW DEPOT TREE :: {0} fichier(s) ==" -f $plan.Count); foreach($p in $plan){ Write-Host ("DEPOT {0} -> {1}" -f $p.Src, $p.Dst) }
if($Preview){ Write-Host "[INFO] Preview : aucune écriture."; Write-Host ("Pour exécuter :`n  powershell -NoProfile -ExecutionPolicy Bypass -File `"{0}`" -Execute" -f $MyInvocation.MyCommand.Definition); exit 0 }
$ok=0; $errors=0
foreach($p in $plan){
  try{
    Ensure-Parent $p.Tmp; Copy-Item -LiteralPath $p.Src -Destination $p.Tmp -Force
    $shaLocal = Sha $p.Src; $shaTmp = Sha $p.Tmp
    if($shaLocal -ne $shaTmp){ Write-Host ("[NOK] SHA local/tmp diff -> {0}" -f $p.Rel); $errors++; continue }
    if(Test-Path -LiteralPath $p.Dst){ $bak = $p.Dst + "." + $ts + ".bak"; Rename-Item -LiteralPath $p.Dst -NewName (Split-Path -Leaf $bak) -Force }
    Ensure-Parent $p.Dst; Move-Item -LiteralPath $p.Tmp -Destination $p.Dst -Force
    $shaFinal = Sha $p.Dst; if($shaFinal -ne $shaLocal){ Write-Host ("[NOK] SHA final diff -> {0}" -f $p.Rel); $errors++ } else { $ok++ }
  }catch{ $errors++; Write-Host ("[NOK] {0} -> {1} :: {2}" -f $p.Src, $p.Dst, $_.Exception.Message) }
}
Write-Host ("== RESULTAT == OK={0} Errors={1}" -f $ok, $errors); exit ([int]([bool]($errors -gt 0)))