import os

def generate_blueprint_structure(root_dir):
    blueprint = {}
    
    # Traverse the directory structure starting from the root_dir
    for root, dirs, files in os.walk(root_dir):
        # Identify the relative path to the current directory
        relative_path = os.path.relpath(root, root_dir)
        # Skip the root directory itself
        if relative_path == ".":
            continue
         # Split the relative path into its components
        path_parts = relative_path.split(os.sep)
        # Check if we're in a directory like user/templates/user/
        if len(path_parts) >= 3:
            if path_parts[0] == path_parts[2]:
                blueprint_name = path_parts[2]
                # Initialize the dictionary for the blueprint if it doesn't exist
                if blueprint_name not in blueprint:
                    blueprint[blueprint_name] = {"directory": [], "html_files": []}
                    blueprint[blueprint_name]["directory"].append(blueprint_name)
                
                # Process files, specifically .html files, and add them to the "html_files" list
                for f in files:
                    if f.endswith(".html"):
                        blueprint[blueprint_name]["html_files"].append(os.path.splitext(f)[0]) 
    return blueprint