# deposit_tree_lot2_blocking_fix_v1.0.ps1
# Objet : Déposer un lot (arborescence) depuis C:\GovDrop\incoming\lot2\* vers \\..._registry\<mêmes sous-dossiers>
# SAFE-CREATE : Ensure-Parent -> copie __tmp_tree -> Move-Item atomique -> .bak -> triple SHA
# PS 5.1 strict, UTF-8 BOM.
param(
  [string]$Root="\\DS-918\chatgpt\ChatGPT-Gouvernance-Projets\_registry",
  [string]$InDir="C:\GovDrop\incoming\lot2",
  [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

# Liste de tous les fichiers sous InDir
$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
}

if($Execute){
  $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)))
}