import os
import json
import csv

def extract_node_data(utg_file_path, apk_folder_name):
    """
    Extract 'screen_id', 'state_str', 'structure_str', 'vh_json_id', and 'vh_xml_id' from the 'utg.js' file,
    and prefix identifiers with the apk folder name for uniqueness.
    
    Parameters:
    - utg_file_path (str): The path to the utg.js file.
    - apk_folder_name (str): The name of the APK folder for prefixing identifiers.

    Returns:
    - List of dictionaries containing 'screen_id', 'state_str', 'structure_str', 'vh_json_id', and 'vh_xml_id' for each node.
    """
    data = []
    states_folder = os.path.join(os.path.dirname(utg_file_path), 'states')
    
    try:
        with open(utg_file_path, 'r') as file:
            content = file.read()
            content = content.replace("var utg =", "").strip()  # Remove prefix for JSON parsing
            utg_data = json.loads(content)
            
            for node in utg_data.get("nodes", []):
                image_path = node.get("image")
                
                # Get the base name and suffix for mapping other files
                base_name = os.path.splitext(os.path.basename(image_path))[0].replace("screen_", "")
                
                # Map the corresponding state JSON and window dump files
                vh_json_id = f"{apk_folder_name}/states/state_{base_name}.json"
                vh_xml_id = f"{apk_folder_name}/states/window_dump_{base_name}.xml"
                
                # Construct full paths for each file and verify if they exist
                vh_json_path = os.path.join(states_folder, f"state_{base_name}.json")
                vh_xml_path = os.path.join(states_folder, f"window_dump_{base_name}.xml")
                
                # Only include the paths if the files exist
                data.append({
                    "screen_id": f"{apk_folder_name}/{image_path}",
                    "state_str": node.get("state_str"),
                    "structure_str": node.get("structure_str"),
                    "vh_json_id": vh_json_id if os.path.isfile(vh_json_path) else "",
                    "vh_xml_id": vh_xml_id if os.path.isfile(vh_xml_path) else ""
                })
    except Exception as e:
        print(f"Error processing {utg_file_path}: {e}")
    
    return data

def process_single_folder(apk_folder_path):
    """
    Process a single APK folder containing a 'utg.js' file and save data to a CSV file.
    
    Parameters:
    - apk_folder_path (str): The path to the APK folder containing a utg.js file.
    """
    output_csv_path = os.path.join(apk_folder_path, "screenshot_state_mapping.csv")
    utg_file_path = os.path.join(apk_folder_path, 'utg.js')
    apk_folder_name = os.path.basename(apk_folder_path.rstrip('/'))
    
    if os.path.isfile(utg_file_path):
        data = extract_node_data(utg_file_path, apk_folder_name)
        
        # Write data to CSV with specified column names
        with open(output_csv_path, 'w', newline='') as csvfile:
            fieldnames = ["screen_id", "state_str", "structure_str", "vh_json_id", "vh_xml_id"]
            writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
            
            writer.writeheader()
            writer.writerows(data)
        
        print(f"CSV file generated for {apk_folder_path} at {output_csv_path}")
    else:
        print(f"No utg.js file found in {apk_folder_path}")

def process_multiple_folders(parent_folder_path):
    """
    Process multiple APK folders within a parent folder, each containing a 'utg.js' file, and save all data to a single CSV file.
    
    Parameters:
    - parent_folder_path (str): The path to the parent folder containing multiple APK folders.
    """
    output_csv_path = os.path.join(parent_folder_path, "screenshot_state_mapping.csv")
    all_data = []
    
    # Iterate over subfolders (APK folders)
    for apk_folder_name in os.listdir(parent_folder_path):
        apk_folder_path = os.path.join(parent_folder_path, apk_folder_name)
        
        # Ensure it's a directory containing a utg.js file
        if os.path.isdir(apk_folder_path):
            utg_file_path = os.path.join(apk_folder_path, 'utg.js')
            if os.path.isfile(utg_file_path):
                folder_data = extract_node_data(utg_file_path, apk_folder_name)
                all_data.extend(folder_data)
            else:
                print(f"Skipping {apk_folder_path} - no utg.js file found")
    
    # Write all data to a single CSV file
    with open(output_csv_path, 'w', newline='') as csvfile:
        fieldnames = ["screen_id", "state_str", "structure_str", "vh_json_id", "vh_xml_id"]
        writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
        
        writer.writeheader()
        writer.writerows(all_data)
    
    print(f"Overall CSV file generated at {output_csv_path}")


# Specify the folder path
folder_path = '/path/to/folder'

# Uncomment one of the following lines to run the desired function:
# For processing a single APK folder, uncomment this line:
# process_single_folder(folder_path)

# For processing multiple APK folders in a parent folder, uncomment this line:
# process_multiple_folders(folder_path)