[CmdletBinding()]
$Phase = 'either'

$ErrorActionPreference = 'Stop'
$ToolRoot = Join-Path $env:ProgramData 'Sweep'
$LogRoot = Join-Path $ToolRoot 'Logs'
New-Item -ItemType Directory -Force -Path $LogRoot | Out-Null
$LogFile = Join-Path $LogRoot ("run-{0:yyyyMMdd-HHmmss}.log" -f (Get-Date))
function Write-RunLog([string]$Message) { $line = "$(Get-Date -Format o) $Message"; $line | Tee-Object -FilePath $LogFile -Append }


$Actions = @(

)
$Requested = @($Actions | Where-Object { $Phase -eq 'either' -or $_.Phase -eq 'either' -or $_.Phase -eq $Phase })
if ($Requested.Count -eq 0) { Write-Host 'No selected tweaks apply to this phase.'; exit 0 }
if ($false) { throw 'Administrator rights are required for one or more selected tweaks.' }
$build = [Environment]::OSVersion.Version.Build
if ($build -notin 22631, 26100, 26200) { throw "Unsupported Windows build: $build. No changes were made." }
Write-RunLog "Windows build $build; phase $Phase; selected: $($Requested.Name -join ', ')"
try { Checkpoint-Computer -Description 'Before Sweep changes' -RestorePointType 'MODIFY_SETTINGS' -ErrorAction SilentlyContinue } catch { Write-RunLog "Restore point unavailable: $($_.Exception.Message)" }
$total = $Requested.Count
$completed = 0
foreach ($action in $Requested) {
  $current = $completed + 1
  $percent = [math]::Floor(($completed / $total) * 100)
  Write-Progress -Activity 'Applying Windows configuration' -Status "[$current/$total] $($action.Name)" -PercentComplete $percent
  Write-RunLog "[$current/$total] $($action.Name): started"
  try { & $action.Run; Write-RunLog "[$current/$total] $($action.Name): success" }
  catch { Write-RunLog "[$current/$total] $($action.Name): failed - $($_.Exception.Message)" }
  $completed++
}
Write-Progress -Activity 'Applying Windows configuration' -Completed
@{ toolVersion = '1.0.0'; schemaVersion = 1; phase = $Phase; build = $build; actions = @($Requested.Name); log = $LogFile } | ConvertTo-Json | Set-Content (Join-Path $ToolRoot 'applied-config.json')
Write-RunLog 'Completed. Sign out or restart if Explorer changes are not visible.'