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@echo off
setlocal ENABLEDELAYEDEXPANSION

:: Carpeta destino de logs
set "LOG_DIR=C:\Temp\OSUpgrade"
if not exist "%LOG_DIR%" mkdir "%LOG_DIR%"

:: Obtener ruta del script
set "PATCH_DIR=%~dp0"
cd /d "%PATCH_DIR%"

:: Obtener fecha y hora en formato YYYYMMDD_HHMMSS con PowerShell
for /f "usebackq tokens=*" %%i in (`powershell -NoLogo -NoProfile -Command "(Get-Date).ToString('yyyyMMdd_HHmmss')"`) do set "DATETIME=%%i"

:: Nombre del host
set "HOSTNAME=%COMPUTERNAME%"

:: Archivo de log
set "LOG_FILE=%LOG_DIR%\patchinglog_%HOSTNAME%_%DATETIME%.txt"

echo ============================================== > "%LOG_FILE%"
echo Inicio de instalacion - %DATE% %TIME% >> "%LOG_FILE%"
echo Equipo: %HOSTNAME% >> "%LOG_FILE%"
echo ============================================== >> "%LOG_FILE%"

:: Inicializar listas y contadores
set "LIST_OK="
set "LIST_REBOOT="
set "LIST_ALREADY="
set "LIST_NOTAPPLICABLE="
set "LIST_PENDING="
set "LIST_ERROR="

set COUNT_OK=0
set COUNT_REBOOT=0
set COUNT_ALREADY=0
set COUNT_NOTAPPLICABLE=0
set COUNT_PENDING=0
set COUNT_ERROR=0
set COUNT_TOTAL=0

:: Verificar si hay archivos MSU
dir /b *.msu >nul 2>&1
if errorlevel 1 (
    echo No se encontraron archivos MSU en %PATCH_DIR%
    echo [%DATE% %TIME%] No se encontraron archivos MSU >> "%LOG_FILE%"
    goto :FIN
)

:: Crear lista ordenada por fecha ascendente
dir /b /od *.msu > parches_ordenados.txt

:: Ejecutar los parches uno por uno
set INDEX=0
for /f "usebackq delims=" %%F in ("parches_ordenados.txt") do call :INSTALAR "%%F"

goto :RESUMEN

:: --------- Subrutina de instalacion ----------
:INSTALAR
set /a INDEX+=1
set /a COUNT_TOTAL+=1
set "PARCHE=%~1"
echo Instalando parche !INDEX!: !PARCHE!
echo [%DATE% %TIME%] Instalando: !PARCHE! (!INDEX!) >> "%LOG_FILE%"

start /wait "" wusa "!PARCHE!" /quiet /norestart
set ERRLEVEL=%ERRORLEVEL%

if %ERRLEVEL%==0 (
    echo Instalacion exitosa de !PARCHE!
    echo Instalacion exitosa de !PARCHE! >> "%LOG_FILE%"
    set "LIST_OK=!LIST_OK! !PARCHE!"
    set /a COUNT_OK+=1
) else if %ERRLEVEL%==3010 (
    echo Instalacion exitosa de !PARCHE!, requiere reinicio
    echo Instalacion exitosa de !PARCHE!, requiere reinicio >> "%LOG_FILE%"
    set "LIST_REBOOT=!LIST_REBOOT! !PARCHE!"
    set /a COUNT_REBOOT+=1
) else if %ERRLEVEL%==2359302 (
    echo El parche !PARCHE! ya esta instalado
    echo El parche !PARCHE! ya esta instalado >> "%LOG_FILE%"
    set "LIST_ALREADY=!LIST_ALREADY! !PARCHE!"
    set /a COUNT_ALREADY+=1
) else if %ERRLEVEL%==-2145124329 (
    echo El parche !PARCHE! no es aplicable a este sistema
    echo El parche !PARCHE! no es aplicable a este sistema >> "%LOG_FILE%"
    set "LIST_NOTAPPLICABLE=!LIST_NOTAPPLICABLE! !PARCHE!"
    set /a COUNT_NOTAPPLICABLE+=1
) else if %ERRLEVEL%==-905928699 (
    echo El parche !PARCHE! no se puede instalar: reinicio pendiente
    echo El parche !PARCHE! no se puede instalar: reinicio pendiente >> "%LOG_FILE%"
    set "LIST_PENDING=!LIST_PENDING! !PARCHE!"
    set /a COUNT_PENDING+=1
) else (
    echo Error al instalar !PARCHE! - Codigo: %ERRLEVEL%
    echo Error al instalar !PARCHE! - Codigo de error: %ERRLEVEL% >> "%LOG_FILE%"
    set "LIST_ERROR=!LIST_ERROR! !PARCHE!(%ERRLEVEL%)"
    set /a COUNT_ERROR+=1
)
echo ---------------------------

exit /b
:: ---------------------------------------------

:RESUMEN
(
echo.
echo ==============================================
echo RESUMEN DE INSTALACION
echo ==============================================

if defined LIST_OK (
    echo.
    echo [OK] Instalados correctamente:
    for %%A in (!LIST_OK!) do echo   %%A
)

if defined LIST_REBOOT (
    echo.
    echo [REBOOT] Instalados, requieren reinicio:
    for %%A in (!LIST_REBOOT!) do echo   %%A
)

if defined LIST_ALREADY (
    echo.
    echo [YA] Ya instalados:
    for %%A in (!LIST_ALREADY!) do echo   %%A
)

if defined LIST_NOTAPPLICABLE (
    echo.
    echo [NA] No aplicables a este sistema:
    for %%A in (!LIST_NOTAPPLICABLE!) do echo   %%A
)

if defined LIST_PENDING (
    echo.
    echo [PEND] No instalados por reinicio pendiente:
    for %%A in (!LIST_PENDING!) do echo   %%A
)

if defined LIST_ERROR (
    echo.
    echo [ERROR] Fallaron con error desconocido:
    for %%A in (!LIST_ERROR!) do echo   %%A
)

echo.
echo ==============================================
echo CONTEO FINAL
echo ==============================================
echo Total procesados: %COUNT_TOTAL%
echo   OK: %COUNT_OK%
echo   Requieren reinicio: %COUNT_REBOOT%
echo   Ya instalados: %COUNT_ALREADY%
echo   No aplicables: %COUNT_NOTAPPLICABLE%
echo   Reinicio pendiente: %COUNT_PENDING%
echo   Errores: %COUNT_ERROR%
) >> "%LOG_FILE%"

type "%LOG_FILE%"

goto :REINICIO

:REINICIO
del parches_ordenados.txt
choice /m "Deseas reiniciar el servidor ahora?"
if errorlevel 2 (
    echo No se reiniciara el servidor.
    echo [%DATE% %TIME%] Instalacion finalizada sin reinicio >> "%LOG_FILE%"
) else (
    echo Reiniciando servidor...
    echo [%DATE% %TIME%] Instalacion finalizada - reinicio iniciado >> "%LOG_FILE%"
    shutdown /r /t 10
)

:FIN
pause
endlocal