# Function to get the outdated app list, in formatted array

function Get-WingetOutdatedApps 
{
   class Software {
      [string]$Name
      [string]$Id
      [string]$Version
      [string]$AvailableVersion
   }

   # Get list of available upgrades on winget format
   $upgradeResult = (& $Winget upgrade --source winget | Out-String)

   # Start Convertion of winget format to an array. Check if "-----" exists (Winget Error Handling)
   if (!($upgradeResult -match '-----')) 
   {
      return "An unusual thing happened (maybe all apps are upgraded):`n$upgradeResult"
   }

   # Split winget output to lines
   $lines = $upgradeResult.Split([Environment]::NewLine) | Where-Object -FilterScript {
      $_ 
   }

   # Find the line that starts with "------"
   $fl = 0
   while (-not $lines[$fl].StartsWith('-----')) 
   {
      $fl++
   }

   # Get header line
   $fl = $fl - 1

   # Get header titles [without remove seperator]
   $index = $lines[$fl] -split '(?<=\s)(?!\s)'

   # Line $fl has the header, we can find char where we find ID and Version [and manage non latin characters]
   $idStart = $($index[0] -replace '[\u4e00-\u9fa5]', '**').Length
   $versionStart = $idStart + $($index[1] -replace '[\u4e00-\u9fa5]', '**').Length
   $availableStart = $versionStart + $($index[2] -replace '[\u4e00-\u9fa5]', '**').Length

   # Now cycle in real package and split accordingly
   $upgradeList = @()

   For ($i = $fl + 2; $i -lt $lines.Length; $i++) 
   {
      $line = $lines[$i] -replace '[\u2026]', ' ' #Fix "..." in long names

      if ($line.StartsWith('-----')) 
      {
         # Get header line
         $fl = $i - 1

         # Get header titles [without remove seperator]
         $index = $lines[$fl] -split '(?<=\s)(?!\s)'

         # Line $fl has the header, we can find char where we find ID and Version [and manage non latin characters]
         $idStart = $($index[0] -replace '[\u4e00-\u9fa5]', '**').Length
         $versionStart = $idStart + $($index[1] -replace '[\u4e00-\u9fa5]', '**').Length
         $availableStart = $versionStart + $($index[2] -replace '[\u4e00-\u9fa5]', '**').Length
      }

      # (Alphanumeric | Literal . | Alphanumeric) - the only unique thing in common for lines with applications
      if ($line -match '\w\.\w') 
      {
         $software = [Software]::new()
         # Manage non latin characters
         $nameDeclination = $($line.Substring(0, $idStart) -replace '[\u4e00-\u9fa5]', '**').Length - $line.Substring(0, $idStart).Length
         $software.Name = $line.Substring(0, $idStart - $nameDeclination).TrimEnd()
         $software.Id = $line.Substring($idStart - $nameDeclination, $versionStart - $idStart).TrimEnd()
         $software.Version = $line.Substring($versionStart - $nameDeclination, $availableStart - $versionStart).TrimEnd()
         $software.AvailableVersion = $line.Substring($availableStart - $nameDeclination).TrimEnd()
         # add formated soft to list
         $upgradeList += $software
      }
   }

   # If current user is not system, remove system apps from list
   if ($IsSystem -eq $false) 
   {
      $SystemApps = Get-Content -Path ('{0}\winget_system_apps.txt' -f $WorkingDir)
      $upgradeList = $upgradeList | Where-Object -FilterScript {
         $SystemApps -notcontains $_.Id 
      }
   }

   return $upgradeList | Sort-Object -Property {
      Get-Random 
   }
}