import bpy

common_modifier_props = ['__doc__', '__module__', '__slots__', 'bl_rna', 'execution_time', 'is_active', 'is_override_data', 'name', 'rna_type', 'show_expanded', 'show_in_editmode', 'show_on_cage', 'show_render', 'show_viewport', 'type', 'use_apply_on_spline']


current_modifiers = {}
current_modifier_values = {}

def modifier_update_handler(scene):
    for obj in scene.objects:
        if obj.modifiers:
            
            ### Check if new modifiers have been added or removed, if so re-read all modifier values
            new_modifiers = [mod.name for mod in obj.modifiers]
            if obj.name not in current_modifiers or current_modifiers[obj.name] != new_modifiers:
                print(f"Modifier added/removed for object: {obj.name}")
                current_modifiers[obj.name] = new_modifiers
                for i, mod in enumerate(obj.modifiers):
                    current_modifier_values[f"{obj.name}_modifier_{i}"] = [getattr(mod, x) for x in [property for property in dir(mod) if property not in common_modifier_props]]
                
            ### Check if any modifier values have changed    
            for i, mod in enumerate(obj.modifiers):
                new_modifier_values = [getattr(mod, x) for x in [property for property in dir(mod) if property not in common_modifier_props]]
                #print(new_modifier_values)
                
                if f"{obj.name}_modifier_{i}" not in current_modifier_values or current_modifier_values[f"{obj.name}_modifier_{i}"] != new_modifier_values:
                    print(f"Modifier {mod.name} updated for object: {obj.name}", new_modifier_values)
                    current_modifier_values[f"{obj.name}_modifier_{i}"] = new_modifier_values
                    
bpy.app.handlers.depsgraph_update_post.clear()
bpy.app.handlers.depsgraph_update_post.append(modifier_update_handler)