import os
import ctypes
import ctypes.util
import logging

logger = logging.getLogger(__name__)

def patch_weasyprint_libraries():
    """
    Attempts to load required system libraries for WeasyPrint.
    This helps on systems where libraries are installed but not in the standard search path
    or have slightly different names.
    """
    # Common library names for WeasyPrint dependencies
    libs_to_load = [
        ('glib-2.0', ['libglib-2.0.so.0', 'libglib-2.0.so']),
        ('gobject-2.0', ['libgobject-2.0.so.0', 'libgobject-2.0.so', 'libgobject-2.0-0']),
        ('fontconfig', ['libfontconfig.so.1', 'libfontconfig.so']),
        ('cairo', ['libcairo.so.2', 'libcairo.so']),
        ('pango-1.0', ['libpango-1.0.so.0', 'libpango-1.0.so']),
        ('pangoft2-1.0', ['libpangoft2-1.0.so.0', 'libpangoft2-1.0.so']),
        ('harfbuzz', ['libharfbuzz.so.0', 'libharfbuzz.so']),
    ]
    
    for lib_id, fallbacks in libs_to_load:
        try:
            # First try standard find_library
            path = ctypes.util.find_library(lib_id)
            if path:
                ctypes.CDLL(path)
                continue
            
            # If not found, try fallbacks
            for fallback in fallbacks:
                try:
                    ctypes.CDLL(fallback)
                    break
                except OSError:
                    continue
        except Exception as e:
            logger.debug(f"Failed to load library {lib_id}: {e}")

# Call it immediately when this module is imported
patch_weasyprint_libraries()

def get_weasyprint_html():
    """
    Safe wrapper for importing WeasyPrint HTML.
    """
    try:
        from weasyprint import HTML
        return HTML
    except Exception as e:
        logger.error(f"Failed to import WeasyPrint HTML: {e}")
        raise