@ECHO OFF
REM CHECKUPD.BAT - Check for available updates without applying them
REM Quick status check to see if network has newer files
REM
REM Usage: CHECKUPD
REM
REM Checks these sources:
REM   T:\COMMON\ProdSW\*.bat
REM   T:\%MACHINE%\ProdSW\*.*
REM   T:\COMMON\DOS\*.NEW
REM
REM Version: 1.0 - DOS 6.22 compatible
REM Last modified: 2026-01-19

REM ==================================================================
REM STEP 1: Verify machine name is set
REM ==================================================================

IF NOT "%MACHINE%"=="" GOTO CHECK_DRIVE

:NO_MACHINE
ECHO.
ECHO [ERROR] MACHINE variable not set
ECHO.
ECHO Set MACHINE in AUTOEXEC.BAT:
ECHO   SET MACHINE=TS-4R
ECHO.
PAUSE
GOTO END

REM ==================================================================
REM STEP 2: Verify T: drive is accessible
REM ==================================================================

:CHECK_DRIVE
REM Test T: drive access
DIR T:\ >nul
IF ERRORLEVEL 1 GOTO NO_T_DRIVE
C:

REM Double-check with NUL device test
IF NOT EXIST T:\*.* GOTO NO_T_DRIVE
GOTO START_CHECK

:NO_T_DRIVE
C:
ECHO.
ECHO [ERROR] T: drive not available
ECHO.
ECHO Run: C:\NET\STARTNET.BAT
ECHO.
PAUSE
GOTO END

REM ==================================================================
REM STEP 3: Display check banner
REM ==================================================================

:START_CHECK
ECHO.
ECHO ==============================================================
ECHO Update Check: %MACHINE%
ECHO ==============================================================
ECHO.

REM Initialize flags (no counters - not critical for functionality)
SET COMMON=
SET MACHINEFILES=
SET SYSFILE=

REM ==================================================================
REM STEP 4: Check COMMON batch files
REM ==================================================================

ECHO [1/3] Checking T:\COMMON\ProdSW for batch file updates...

IF NOT EXIST T:\COMMON\ProdSW\NUL GOTO NO_COMMON

REM Check for files on network
FOR %%F IN (T:\COMMON\ProdSW\*.BAT) DO CALL :CHECK_COMMON_FILE %%F

IF "%COMMON%"=="" ECHO       [OK] No updates in COMMON
IF NOT "%COMMON%"=="" ECHO       [FOUND] Updates available in COMMON

ECHO.
GOTO CHECK_MACHINE

:NO_COMMON
ECHO       [SKIP] T:\COMMON\ProdSW not found
ECHO.

REM ==================================================================
REM STEP 5: Check machine-specific files
REM ==================================================================

:CHECK_MACHINE
ECHO [2/3] Checking T:\%MACHINE%\ProdSW for machine-specific updates...

IF NOT EXIST T:\%MACHINE%\ProdSW\NUL GOTO NO_MACHINE_DIR

REM Check for any files (BAT, EXE, DAT)
FOR %%F IN (T:\%MACHINE%\ProdSW\*.*) DO CALL :COUNT_FILE

IF "%MACHINEFILES%"=="" ECHO       [OK] No updates for %MACHINE%
IF NOT "%MACHINEFILES%"=="" ECHO       [FOUND] Updates available for %MACHINE%

ECHO.
GOTO CHECK_SYSTEM

:NO_MACHINE_DIR
ECHO       [SKIP] T:\%MACHINE%\ProdSW not found
ECHO.

REM ==================================================================
REM STEP 6: Check system file updates
REM ==================================================================

:CHECK_SYSTEM
ECHO [3/3] Checking T:\COMMON\DOS for system file updates...

IF NOT EXIST T:\COMMON\DOS\NUL GOTO NO_DOS_DIR

REM Check for .NEW files
IF EXIST T:\COMMON\DOS\AUTOEXEC.NEW SET SYSFILE=FOUND
IF EXIST T:\COMMON\DOS\AUTOEXEC.NEW ECHO       [FOUND] AUTOEXEC.NEW (system reboot required)

IF EXIST T:\COMMON\DOS\CONFIG.NEW SET SYSFILE=FOUND
IF EXIST T:\COMMON\DOS\CONFIG.NEW ECHO       [FOUND] CONFIG.NEW (system reboot required)

IF "%SYSFILE%"=="" ECHO       [OK] No system file updates

ECHO.
GOTO SHOW_SUMMARY

:NO_DOS_DIR
ECHO       [SKIP] T:\COMMON\DOS not found
ECHO.

REM ==================================================================
REM STEP 7: Show summary and recommendations
REM ==================================================================

:SHOW_SUMMARY
REM Determine if any updates found
SET HASUPDATES=
IF NOT "%COMMON%"=="" SET HASUPDATES=YES
IF NOT "%MACHINEFILES%"=="" SET HASUPDATES=YES
IF NOT "%SYSFILE%"=="" SET HASUPDATES=YES

ECHO ==============================================================
ECHO Update Summary
ECHO ==============================================================
ECHO.
ECHO Available updates:
IF NOT "%COMMON%"=="" ECHO   [FOUND] Common batch files
IF "%COMMON%"=="" ECHO   [OK] Common batch files
IF NOT "%MACHINEFILES%"=="" ECHO   [FOUND] Machine-specific files
IF "%MACHINEFILES%"=="" ECHO   [OK] Machine-specific files
IF NOT "%SYSFILE%"=="" ECHO   [FOUND] System files
IF "%SYSFILE%"=="" ECHO   [OK] System files
ECHO.

REM Provide recommendation
IF "%HASUPDATES%"=="" GOTO NO_UPDATES_AVAILABLE

ECHO Recommendation:
ECHO   Run NWTOC to download and install updates
ECHO.
IF NOT "%SYSFILE%"=="" ECHO   [WARNING] System file updates will require reboot
IF NOT "%SYSFILE%"=="" ECHO.

GOTO END

:NO_UPDATES_AVAILABLE
ECHO Status: All files are up to date
ECHO.

GOTO END

REM ==================================================================
REM HELPER SUBROUTINES
REM ==================================================================

:CHECK_COMMON_FILE
REM Check if network file is newer than local file
REM %1 = network file path (e.g., T:\COMMON\ProdSW\NWTOC.BAT)

REM Extract filename from path
SET NETFILE=%1
SET FILENAME=%~nx1

REM Check if local file exists
IF NOT EXIST C:\BAT\%FILENAME% SET COMMON=FOUND
IF NOT EXIST C:\BAT\%FILENAME% GOTO CHECK_COMMON_DONE

REM Both files exist - compare using XCOPY /D
REM Create temp directory for test
IF NOT EXIST C:\TEMP\*.* MD C:\TEMP

REM Try to copy with /D (only if newer)
XCOPY %NETFILE% C:\TEMP\ /D /Y >NUL 2>NUL
IF NOT ERRORLEVEL 1 SET COMMON=FOUND

REM Clean up
IF EXIST C:\TEMP\%FILENAME% DEL C:\TEMP\%FILENAME%

:CHECK_COMMON_DONE
GOTO END_SUBROUTINE

:COUNT_FILE
REM Flag that machine-specific files exist
SET MACHINEFILES=FOUND
GOTO END_SUBROUTINE

:END_SUBROUTINE
REM Return point for all subroutines (replaces :EOF)

REM ==================================================================
REM CLEANUP AND EXIT
REM ==================================================================

:END
REM Clean up environment variables
SET COMMON=
SET MACHINEFILES=
SET SYSFILE=
SET HASUPDATES=
SET NETFILE=
SET FILENAME=