"""Configuration settings for the PDF Musical Score Cleaner."""

import os
import multiprocessing
from enum import IntEnum

class OptimizationLevel(IntEnum):
    """Optimization levels for image processing.
    
    Levels:
        1: Only trim whitespace
        2: Trim + convert to 1-bit monochrome
        3: All optimizations + optipng
    """
    TRIM = 1  # Only trim whitespace
    MONOCHROME = 2  # Trim + convert to 1-bit monochrome
    FULL = 3  # All optimizations + optipng

# Number of parallel processes to use for operations that support parallelization
# Defaults to number of CPU cores - 1, but never less than 1
DEFAULT_PARALLEL_PROCESSES = max(1, multiprocessing.cpu_count() - 1)

# Can be overridden by environment variable
PARALLEL_PROCESSES = int(os.getenv('NOTES_CLEANER_PARALLEL_PROCESSES', DEFAULT_PARALLEL_PROCESSES))

# Border size in pixels for the final PDF output
PDF_BORDER_SIZE = 50

# Optimization settings
OPTIPNG_OPTIMIZATION_LEVEL = int(os.getenv('NOTES_CLEANER_OPTIPNG_LEVEL', '7'))  # 0-7, higher = better compression but slower
TRIM_PADDING_PIXELS = int(os.getenv('NOTES_CLEANER_TRIM_PADDING', '20'))  # Padding around content after trimming

# Image processing settings
MONOCHROME_THRESHOLD = int(os.getenv('NOTES_CLEANER_MONO_THRESHOLD', '200'))  # 0-255, higher = more white

# Temporary directory settings
TEMP_DIR_PREFIX = 'notes_cleaner_'