@echo off
setlocal enabledelayedexpansion

echo Starting Blender file compression...

REM Create input and output directories if they don't exist
if not exist "input" mkdir "input"
if not exist "output" mkdir "output"

REM Create a temporary Python script for compression
set "TEMP_SCRIPT=compress_blend_temp.py"
echo Creating Python script: !TEMP_SCRIPT!
(
echo import bpy
echo import os
echo import glob
echo.
echo # Enable compression globally
echo bpy.context.preferences.filepaths.save_version = 0
echo bpy.context.preferences.filepaths.use_file_compression = True
echo.
echo # Create input and output directories if they don't exist
echo if not os.path.exists^("input"^):
echo     os.makedirs^("input"^)
echo if not os.path.exists^("output"^):
echo     os.makedirs^("output"^)
echo.
echo # Get all .blend files in input directory
echo blend_files = glob.glob^("input/*.blend"^)
echo.
echo print^("Found " + str^(len^(blend_files^)^) + " .blend files to compress"^)
echo.
echo for blend_file in blend_files:
echo     try:
echo         # Create output path in output folder
echo         filename = os.path.basename^(blend_file^)
echo         output_file = os.path.join^("output", filename^)
echo         # Check if output file already exists
echo         if os.path.exists^(output_file^):
echo             print^("Skipping " + blend_file + " ^(already exists in output^)"^)
echo             continue
echo         print^("Processing: " + blend_file^)
echo         # Load the blend file
echo         bpy.ops.wm.open_mainfile^(filepath=blend_file^)
echo         # Save with compression to output folder
echo         bpy.ops.wm.save_mainfile^(filepath=output_file, compress=True^)
echo         print^("Successfully compressed: " + blend_file + " -^> " + output_file^)
echo     except Exception as e:
echo         print^("Failed to compress " + blend_file + ": " + str^(e^)^)
echo.
echo print^("Compression complete!"^)
echo bpy.ops.wm.quit_blender^(^)
) > "!TEMP_SCRIPT!"

REM Check if script was created successfully
if exist "!TEMP_SCRIPT!" (
    echo Script created successfully: !TEMP_SCRIPT!
) else (
    echo ERROR: Failed to create script file!
    pause
    exit /b 1
)

REM Run Blender once to process all files
echo Processing all .blend files in a single Blender instance...
echo Using script: !TEMP_SCRIPT!
blender --background --factory-startup --python "!TEMP_SCRIPT!"

REM Clean up temporary script
echo Cleaning up temporary script...
del "!TEMP_SCRIPT!" 2>nul

echo.
echo Done!
pause