Renaming Zoom H2 Files using Applescript

I seem to keep rewriting my file utilities each time I move from PC to Mac, C to Perl and back and now Applescript. Zoom devices are still lacking the ability to save files using time and date stamps. Arguably this is not an issue using the BWF format, however standard directory applications don't read this headers. My usual approach is to use last modified dates which should use the originating filesystem settings (often a variation on FAT), so fairly safe.

-- open a dialog with multiple selections enabled
set file_ to choose file with multiple selections allowed

-- set a boolean to skip verify action
set global_OK to false

repeat with this_file in file_

set file_alias to (this_file as alias)
tell application "Finder"
get properties of file_alias

set file_type to (get kind of file_alias)

if (file_type is "WAVE Audio File") then
--display dialog (file_type)

set d to (get modification date of file_alias)
set t to (time string of d)
set h to (hours of d as string)
set y to (year of d as string)
set m to (month of d as integer as string)
set dy to (day of d as integer as string)
set ss to (seconds of d as integer as string)
set mm to (minutes of d as integer as string)

-- fix padding of day
repeat while length of dy < 2
set dy to ("0" & dy)
end repeat

-- fix padding of month
repeat while length of m < 2
set m to ("0" & m)
end repeat

repeat while length of h < 2
set h to ("0" & h)
end repeat

repeat while length of mm < 2
set mm to ("0" & mm)
end repeat

repeat while length of ss < 2
set ss to ("0" & ss)
end repeat

set f to (get folder of file_alias as string)

set long_string to y & "-" & m & "-" & dy & "T" & h & "h" & mm & "m" & ss & "s" & ".wav"

if (global_OK is false) then

set question to display dialog "Renaming "
& file_alias
& " to "
& long_string buttons {"OK", "OK for All", "Cancel batch"} default button 1
set answer to button returned of question

if (answer is "Cancel batch") then
display dialog "Cancelled" buttons {"Understood"}
return
end if

if (answer is "OK for All") then
set global_OK to true
end if

end if
set name of file file_alias to long_string
else
display dialog ("Not a wav file, skipping")
end if
end tell

end repeat