Permanently delete files via AppleScript

set frontAppPath to (path to frontmost application) as string

if the frontAppPath ends with ":Finder.app:" then
  tell application "Finder"
    set selectionList to get selection as list
    set selectedCount to count items in selectionList
    
    if selectedCount > 0 then
      repeat with i from 1 to number of items in the selectionList
        set selectedItem to item i of the selectionList
        set selectedName to the name of selectedItem
        set homePath to (path to home folder) as string
        set trashPath to homePath & ".Trash:"
        set deletePath to trashPath & selectedName & ":"
        
        if not ((kind of selectedItem as string) is equal to "Volume") then
          if (selectedItem as string) contains ".Trash" then
            set posixPath to POSIX path of (selectedItem as string) as string
            do shell script "rm -rf \"" & posixPath & "\""
          else
            try
              deletePath as alias
              display dialog "Error: file named \"" & selectedName & "\" already exists in the Trash."
            on error
              try
                tell application "Finder" to delete selectedItem
                do shell script "rm -rf ~/.Trash/\"" & selectedName & "\""
              end try
            end try
          end if
        end if
      end repeat
    end if
  end tell
end if