param(
    [Parameter(Mandatory=$false)]
    [string]$ProjectPath = "D:\07-Logiciels\23-youtube_personal"
)

$ErrorActionPreference = "Stop"
$stamp = Get-Date -Format "yyyyMMdd_HHmmss"
$backupRoot = Join-Path $ProjectPath "_backup_before_restore_18_7_5_$stamp"

$files = @(
    "lib\screens\video_player_page.dart",
    "lib\services\windows_hd_service.dart"
)

Write-Host "Baseline protegee YouTube Personal 18.7.5"
Write-Host "Projet : $ProjectPath"
Write-Host "Sauvegarde actuelle : $backupRoot"

foreach ($relative in $files) {
    $current = Join-Path $ProjectPath $relative
    if (Test-Path $current) {
        $backup = Join-Path $backupRoot $relative
        New-Item -ItemType Directory -Force -Path (Split-Path $backup) | Out-Null
        Copy-Item -Force $current $backup
    }
}

foreach ($relative in $files) {
    $source = Join-Path $PSScriptRoot $relative
    $target = Join-Path $ProjectPath $relative
    if (-not (Test-Path $source)) {
        throw "Fichier baseline introuvable : $source"
    }
    New-Item -ItemType Directory -Force -Path (Split-Path $target) | Out-Null
    Copy-Item -Force $source $target
    Write-Host "Restaure : $relative"
}

Write-Host ""
Write-Host "Restauration 18.7.5 terminee."
Write-Host "Ancienne version sauvegardee dans : $backupRoot"