logic/handlers.py

import os.path
import datetime
import io
import PIL
import requests
from typing import Literal

from datasets import load_dataset, concatenate_datasets, Image
from data.lang2eng_map import lang2eng_mapping
from data.words_map import words_mapping
import gradio as gr
import bcrypt
from config.settings import HF_API_TOKEN
from huggingface_hub import snapshot_download
# from .blur import blur_faces, detect_faces
from retinaface import RetinaFace
from gradio_modal import Modal
import numpy as np
import cv2
import time
import re
import os
import glob
from pyuca import Collator
from pillow_heif import register_heif_opener
register_heif_opener()

import spacy_udpipe
# ja_nlp = spacy.load("ja_core_news_sm")
# zh_nlp = spacy.load("zh_core_web_sm")
# import ja_core_news_sm
# import zh_core_web_sm
import spacy_thai
ja_nlp = spacy_udpipe.load("ja")
zh_nlp = spacy_udpipe.load("zh")
th_nlp = spacy_thai.load()


def sort_with_pyuca(strings):
    collator = Collator()
    return sorted(strings, key=collator.sort_key)


def update_image(image_url):
    try:
        headers = {"User-Agent": "Mozilla/5.0"}
        response = requests.get(image_url, headers=headers, timeout=10)
        response.raise_for_status()
        content_type = response.headers.get("Content-Type", "")
        if "image" not in content_type:
            gr.Error(f"⚠️ URL does not point to a valid image.",  duration=5)
            return "Error: URL does not point to a valid image."

        img = PIL.Image.open(io.BytesIO(response.content))
        img = img.convert("RGB")
        return img, Modal(visible=False)
    except Exception as e:
        # print(f"Error: {str(e)}")
        if image_url is None or image_url == "":
            return gr.Image(label="Image", elem_id="image_inp"), Modal(visible=False)
        else:
            return gr.Image(label="Image", value=None, elem_id="image_inp"), Modal(visible=True)


def update_timestamp():
    return gr.Textbox(datetime.datetime.now().timestamp(), label="Timestamp", visible=False) # FIXME visible=False)


def clear_data(message: Literal["submit", "remove"] | None = None):
    if message == "submit":
        gr.Info("If you logged in, you will soon see it at the bottom of the page, where you can edit it or delete it", title="Thank you for submitting your data! 🎉", duration=5)
    elif message == "remove":
        gr.Info("", title="Your data has been deleted! 🗑️", duration=5)
    return (None, None, None, None, None, gr.update(value=None), 
            gr.update(value=[]), gr.update(value=[]), gr.update(value=[]),
            gr.update(value=[]), gr.update(value=[]))


def exit():
    return (None, None, None, gr.Dataset(samples=[]), gr.Markdown("**Loading your data, please wait ...**"), 
            gr.update(value=None), gr.update(value=None), [None, None, "", ""], gr.update(value=None), 
            gr.update(value=None), gr.update(value=None),
            gr.update(value=None), gr.update(value=None), gr.update(value=None), 
            gr.update(value=None), gr.update(value=None))


def validate_metadata(country, language):
    # Perform your validation logic here
    if country is None or language is None:
        return gr.Button("Proceed", interactive=False)

    return gr.Button("Proceed", interactive=True)


def validate_inputs(image, ori_img, concept): # is_blurred
    # Perform your validation logic here
    # import pdb; pdb.set_trace()
    if image is None:
        return gr.Button("Submit", variant="primary", interactive=False), None, None,  # False
    
    if concept is None:
        raise gr.Error("⚠️ Please select the main concept first. Click the ❌ on the image uploader to reset the image.", duration=10)
        return gr.Button("Submit", variant="primary", interactive=False), None, None,  # False
    # Define maximum dimensions
    MAX_WIDTH = 1024
    MAX_HEIGHT = 1024
    
    # Get current dimensions
    height, width = image.shape[:2]
    
    # # Check if resizing is needed
    # NOTE: for now, let's keep the full image resolution
    # if width > MAX_WIDTH or height > MAX_HEIGHT:
    #     # Calculate scaling factor
    #     scale = min(MAX_WIDTH/width, MAX_HEIGHT/height)
        
    #     # Calculate new dimensions
    #     new_width = int(width * scale)
    #     new_height = int(height * scale)
        
    #     # Resize image while maintaining aspect ratio
    #     result_image = cv2.resize(image, (new_width, new_height), interpolation=cv2.INTER_AREA)
    # else:
    #     result_image = image
    result_image = image
    if ori_img is None:
        # If the original image is None, set it to the resized image
        ori_img = gr.State(result_image.copy())

    return gr.Button("Submit", variant="primary", interactive=True), result_image, ori_img # is_blurred


def count_words(caption, language):
    match language:
        case "Japanese":
            doc = ja_nlp(caption)
            tokens = [tok.text for tok in doc if not tok.is_punct]
            num_words = len(tokens)
        case "Chinese":
            doc = zh_nlp(caption)
            tokens = [tok.text for tok in doc if not tok.is_punct]
            num_words = len(tokens)
        case "Thai":
            num_words = len(th_nlp(caption))
        case _:
            num_words = len(caption.split())
    return num_words
    # return gr.Markdown(f"Number of words: {num_words}")


def add_prefix(example, column_name, prefix):
    example[column_name] = (f"{prefix}/" + example[column_name])
    return example

def update_user_data(username, password, country, language_choice, HF_DATASET_NAME, local_ds_directory_path):
    
    datasets_list = []
    # Try loading local dataset
    try:
        snapshot_download(
            repo_id=HF_DATASET_NAME,
            repo_type="dataset",
            local_dir=local_ds_directory_path,  # Your target local directory
            allow_patterns=f"{country}/{language_choice}/{username}/*",  # f"**/{username}/*"
            token=HF_API_TOKEN
        )
    except Exception as e:
        print(f"Snapshot download error: {e}")
    # import pdb; pdb.set_trace()
    if has_user_json(username, country, language_choice, local_ds_directory_path):
        try:
            # ds_local = load_dataset(local_ds_directory_path, data_files=f'logged_in_users/**/{username}/**/*.json') # This does not filter by country and language
            ds_local = load_dataset(local_ds_directory_path, data_files=f'logged_in_users/{country}/{language_choice}/{username}/**/*.json')
            ds_local = ds_local.remove_columns("image_file")
            ds_local = ds_local.rename_column("image", "image_file")
            ds_local = ds_local.map(add_prefix, fn_kwargs={"column_name": "image_file", "prefix": local_ds_directory_path})
            ds_local = ds_local.cast_column("image_file", Image())

            datasets_list.append(list(ds_local.values())[0])
        except Exception as e:
            print(f"Local dataset load error: {e}")

    # # Try loading hub dataset
    # try:
    #     ds_hub = load_dataset(HF_DATASET_NAME, data_files=f'**/{username}/**/*.json', token=HF_API_TOKEN)
    #     ds_hub = ds_hub.cast_column("image_file", Image())
    #     datasets_list.append(list(ds_hub.values())[0])
    # except Exception as e:
    #     print(f"Hub dataset load error: {e}")

    # Handle all empty
    if not datasets_list:
        if username:  # User is logged in but has no data
            return gr.Dataset(samples=[]), gr.Markdown("<p style='color: red;'>No data available for this user. Please upload an image.</p>")
        else:  # No user logged in 
            return gr.Dataset(samples=[]), gr.Markdown("")

    dataset = concatenate_datasets(datasets_list)
    # TODO: we should link username with password and language and country, otherwise there will be an error when loading with different language and clicking on the example
    if username and password:
        user_dataset = dataset.filter(lambda x: x['username'] == username and is_password_correct(x['password'], password))
        user_dataset = user_dataset.sort('timestamp', reverse=True)
        # Show only unique entries (most recent)
        user_ids = set()
        samples = []
        for d in user_dataset:
            if d['id'] in user_ids:
                continue
            user_ids.add(d['id'])
            if d['excluded']:
                continue
            # Get additional concepts by category or empty dict if not present
            # additional_concepts_by_category = {
            #     "category1": d.get("category_1_concepts", []),
            #     "category2": d.get("category_2_concepts", []),
            #     "category3": d.get("category_3_concepts", []),
            #     "category4": d.get("category_4_concepts", []),
            #     "category5": d.get("category_5_concepts", [])
            # }
            additional_concepts_by_category = [
                d.get("category_1_concepts", [""]),
                d.get("category_2_concepts", [""]),
                d.get("category_3_concepts", [""]),
                d.get("category_4_concepts", [""]),
                d.get("category_5_concepts", [""])
            ]
            samples.append(
                [
                    d['image_file'], d['image_url'], d['caption'] or "", d['country'],  
                    d['language'], d['category'], d['concept'], additional_concepts_by_category, d['id']] # d['is_blurred']
            )
        # return gr.Dataset(samples=samples), None
        # ───────────────────────────────────────────────────
        # Clean up the “Additional Concepts” column (index 7)
        cleaned = []
        for row in samples:
            # row is a list, index 7 holds the list-of-lists
            ac = row[7]

            # flatten & drop empty strings
            vals = []
            for sub in ac:
                if isinstance(sub, list):
                    for v in sub:
                        v = v.strip()
                        if v:
                            vals.append(v)

            # now vals contains every non-empty string from every sub-list
            # e.g. ['Arquitectura colonial española', 'Año Nuevo', 'Bata',
            #        'Aborrajado', 'Ajiaco', 'Abanico/ventilador']

            # make a copy and replace only that field
            row_copy = list(row)
            row_copy[7] = ", ".join(vals)
            cleaned.append(row_copy)

        return gr.Dataset(samples=cleaned), None
    else:
        # TODO: should we show the entire dataset instead? What about "other data" tab?
        return gr.Dataset(samples=[]), None


def update_language(local_storage, metadata_dict, concepts_dict):
    country, language, email, password, = local_storage
    # my_translator = GoogleTranslator(source='english', target=metadata_dict[country][language])
    categories = concepts_dict[country][lang2eng_mapping.get(language, language)]
    categories_list = sort_with_pyuca(list(categories.keys()))
    if language in words_mapping:
        categories_keys_translated = [words_mapping[language].get(cat, cat) for cat in categories_list]
    else:
        categories_keys_translated = categories_list
    
    # Get the 5 categories in alphabetical order
    
    # Create translated labels for the 5 categories
    translated_categories = []
    for cat in categories_list:
        if language in words_mapping:
            translated_cat = words_mapping[language].get(cat, cat)
        else:
            translated_cat = cat
        translated_categories.append(translated_cat)

    # Load all possible concepts
    concepts_list = []
    # cats = []  # FIXME: Assumes concepts are unique across all categories
    for cat in concepts_dict[country][language]:
        for concept in concepts_dict[country][language][cat]:
            # cats.append(cat)
            concepts_list.append(concept)
    concepts_list = sort_with_pyuca(concepts_list)
    
    fn = metadata_dict[country][language]["Task"]
    if os.path.exists(fn):
        with open(fn, "r", encoding="utf-8") as f:
            TASK_TEXT = f.read()
    else:
        fn = metadata_dict["USA"]["English"]["Task"]
        with open(fn, "r", encoding="utf-8") as f:
            TASK_TEXT = f.read()
    
    fn = metadata_dict[country][language]["Instructions"]
    if os.path.exists(fn):
        with open(metadata_dict[country][language]["Instructions"], "r", encoding="utf-8") as f:
            INST_TEXT = f.read()
    else:
        fn = metadata_dict["USA"]["English"]["Instructions"]
        with open(fn, "r", encoding="utf-8") as f:
            INST_TEXT = f.read()

    return (
        gr.update(label=metadata_dict[country][language]["Country"], value=country),
        gr.update(label=metadata_dict[country][language]["Language"], value=language),
        gr.update(label=metadata_dict[country][language]["Email"], value=email),
        gr.update(label=metadata_dict[country][language]["Password"], value=password),
        gr.update(choices=categories_keys_translated, interactive=True, label=metadata_dict[country][language]["Category"], allow_custom_value=False, elem_id="category_btn"),
        gr.update(choices=concepts_list, interactive=True, label=metadata_dict[country][language]["Concept"], allow_custom_value=True, elem_id="concept_btn"),
        gr.update(label=metadata_dict[country][language]["Image"]),
        gr.update(label=metadata_dict[country][language]["Image_URL"]),
        gr.update(label=metadata_dict[country][language]["Description"]),
        gr.Markdown(TASK_TEXT),
        gr.Markdown(INST_TEXT),
        gr.update(value=metadata_dict[country][language]["Instructs_btn"]),
        gr.update(value=metadata_dict[country][language]["Clear_btn"]),
        gr.update(value=metadata_dict[country][language]["Submit_btn"]),
        gr.Markdown(metadata_dict[country][language]["Saving_text"]),
        gr.Markdown(metadata_dict[country][language]["Saved_text"]),
        gr.update(label=metadata_dict[country][language]["Timestamp"]),
        gr.update(value=metadata_dict[country][language]["Exit_btn"]),
        gr.Markdown(metadata_dict[country][language]["Browse_text"]),
        gr.Markdown(metadata_dict[country][language]["Loading_msg"]),
        # gr.update(choices=categories_keys_translated, interactive=True, label=metadata_dict[country][language].get("Add_Category","Additional Categories (Optional)"), allow_custom_value=False, elem_id="additional_category_btn"),
        # gr.update(choices=[], interactive=True, label=metadata_dict[country][language].get("Add_Concept","Additional Concepts (Optional)"), allow_custom_value=True, elem_id="additional_concept_btn"),
        gr.update(value=metadata_dict[country][language].get("Hide_all_btn","👤 Hide All Faces")),
        gr.update(value=metadata_dict[country][language].get("Hide_btn","👤 Hide Specific Faces")),
        gr.update(value=metadata_dict[country][language].get("Unhide_btn","👀 Unhide Faces")),
        gr.update(value=metadata_dict[country][language].get("Exclude_btn","Exclude Selected Example")),
        gr.update(label=translated_categories[0], choices=sort_with_pyuca(concepts_dict[country][lang2eng_mapping.get(language, language)][categories_list[0]])),
        gr.update(label=translated_categories[1], choices=sort_with_pyuca(concepts_dict[country][lang2eng_mapping.get(language, language)][categories_list[1]])),
        gr.update(label=translated_categories[2], choices=sort_with_pyuca(concepts_dict[country][lang2eng_mapping.get(language, language)][categories_list[2]])),
        gr.update(label=translated_categories[3], choices=sort_with_pyuca(concepts_dict[country][lang2eng_mapping.get(language, language)][categories_list[3]])),
        gr.update(label=translated_categories[4], choices=sort_with_pyuca(concepts_dict[country][lang2eng_mapping.get(language, language)][categories_list[4]])),
    )


def update_intro_language(selected_country, selected_language, intro_markdown, metadata):
    if selected_language is None:
        return intro_markdown

    fn = metadata[selected_country][selected_language]["Intro"]
    if not os.path.exists(fn):
        return intro_markdown

    with open(metadata[selected_country][selected_language]["Intro"], "r", encoding="utf-8") as f:
        INTRO_TEXT = f.read()    
    return gr.Markdown(INTRO_TEXT)


def handle_click_example(user_examples, concepts_dict):
    # print("handle_click_example")
    # print(user_examples)
    # ex = [item for item in user_examples]
    # ───────────────────────────────────────────────────────────────
    # 1) Turn the flat string in slot 7 back into a list-of-lists
    ex = list(user_examples)
    raw_ac = ex[7] if len(ex) > 7 else ""

    country_btn = ex[3]
    language_btn = ex[4]
    concepts = concepts_dict[country_btn][language_btn]
    categories_list = sort_with_pyuca(list(concepts.keys()))
    # NOTE: assuming concepts are unique across all categories
    if isinstance(raw_ac, str):
        parts = [p.strip() for p in raw_ac.split(",")]
        if raw_ac.strip() == "":
            additional_concepts_by_category = [[], [], [] ,[], []]
        else:
            additional_concepts_by_category = [[], [], [] ,[], []]
            for p in parts:
                if p in concepts[categories_list[0]]:
                    additional_concepts_by_category[0].append(p)
                    continue
                elif p in concepts[categories_list[1]]:
                    additional_concepts_by_category[1].append(p)
                    continue
                elif p in concepts[categories_list[2]]:
                    additional_concepts_by_category[2].append(p)
                    continue
                elif p in concepts[categories_list[3]]:
                    additional_concepts_by_category[3].append(p)
                    continue
                elif p in concepts[categories_list[4]]:
                    additional_concepts_by_category[4].append(p)
                    continue
            # check if any of the lists are empty, if so, add an empty string
            # for i in range(len(additional_concepts_by_category)):
            #     if not additional_concepts_by_category[i]:
            #         additional_concepts_by_category[i].append("")
        
    else:
        # if it somehow already is a list, leave it
        additional_concepts_by_category = raw_ac
    # ───────────────────────────────────────────────────────────────
    image_inp = ex[0]
    image_url_inp = ex[1]
    long_caption_inp = ex[2]
    category_btn = ex[5]
    concept_btn = ex[6]
    # additional_concepts_by_category = ex[7]
    exampleid_btn = ex[8]
    # additional_concepts_by_category = [[] if (len(cat_concept)==1 and cat_concept[0]=='') else cat_concept for cat_concept in additional_concepts_by_category]
    
    # import pdb; pdb.set_trace()
    # # excluded_btn = ex[10] # TODO: add functionality that if True "exclude" button changes to "excluded"
    # # is_blurred = ex[11]
    # # Get predefined categories in the correct order
    # predefined_categories = sorted(list(concepts_dict[country_btn][lang2eng_mapping.get(language_btn, language_btn)].keys()))[:5]
    
    # # Create dropdown values for each category
    # dropdown_values = []
    # for category in predefined_categories:
    #     if additional_concepts_by_category and category in additional_concepts_by_category:
    #         dropdown_values.append(additional_concepts_by_category[category])
    #     else:
    #         dropdown_values.append(None)
    
    ### TODO: fix additional concepts not saving if categories in other language than English
    # # Get the English version of the language
    # eng_lang = lang2eng_mapping.get(language_btn, language_btn)
    
    # # Get predefined categories in the correct order
    # predefined_categories = sorted(list(concepts_dict[country_btn][eng_lang].keys()))[:5]
    
    # # Create dropdown values for each category
    # dropdown_values = []
    # for category in predefined_categories:
    #     if additional_concepts_by_category and category in additional_concepts_by_category:
    #         dropdown_values.append(additional_concepts_by_category[category])
    #     else:
    #         dropdown_values.append(None)

    # Need to return values for each category dropdown
    return [image_inp, image_url_inp, long_caption_inp, exampleid_btn, category_btn, concept_btn] + additional_concepts_by_category + [True]
    # return [
    #     image_inp,
    #     image_url_inp,
    #     long_caption_inp,
    #     exampleid_btn,
    #     category_btn,
    #     concept_btn,
    #     *additional_concepts_by_category,
    #     True  # loading_example flag
    # ]


def is_password_correct(hashed_password, entered_password):
    is_valid = bcrypt.checkpw(entered_password.encode(), hashed_password.encode())
    # print("password_check: ", entered_password," ", hashed_password," ", is_valid)
    return is_valid


## Face blurring functions

def detect_faces(image):
    """
    Detect faces in an image using RetinaFace.

    Args:
        image (numpy.ndarray): Input image in BGR
    
    """
    # Start timer
    start_time = time.time()
    
    # Detect faces using RetinaFace
    detection_start = time.time()
    faces = RetinaFace.detect_faces(image, threshold=0.8)
    detection_time = time.time() - detection_start

    return faces, detection_time

# Hide Faces Button
def select_faces_to_hide(image, blur_faces_ids):
    if image is None:
        return None, Modal(visible=False), Modal(visible=False), None , "", None, gr.update(value=[])
    else:        
        # Detect faces
        # import pdb; pdb.set_trace()
        face_images = image.copy()
        faces, detection_time = detect_faces(face_images)
        print(f"Detection time: {detection_time:.2f} seconds")
        # pdb.set_trace()
        # Draw detections with IDs
        for face_id, face_data in enumerate(faces.values(), start=1):
            x1, y1, x2, y2 = face_data['facial_area']
            box_h = y2 - y1

            # 1) dynamic scale & thickness
            scale     = max(0.5, box_h / 150)
            thickness = max(1, int(box_h / 200))

            # 2) prepare text & size
            text       = f"ID:{face_id}"
            font       = cv2.FONT_HERSHEY_SIMPLEX
            (tw, th), baseline = cv2.getTextSize(text, font, scale, thickness)

            # 3) background rectangle (semi‐opaque or solid)
            bg_tl = (x1, y1 - th - baseline - 4)
            bg_br = (x1 + tw + 4, y1)
            cv2.rectangle(face_images, bg_tl, bg_br, (0,0,0), cv2.FILLED)

            # 4) put contrasting text
            cv2.putText(face_images, text,
                        (x1 + 2, y1 - baseline - 2),
                        font, scale, (255,255,255), thickness, cv2.LINE_AA)

            # 5) draw the face box (optional: use same contrasting color)
            cv2.rectangle(face_images, (x1, y1), (x2, y2), (0,255,0), thickness)
        # Update face count
        face_count = len(faces)
        blur_faces_ids = gr.update(choices=[f"Face ID: {i}" for i in range(1, face_count + 1)])
        current_faces_info = gr.State(faces)
        if face_count == 0:
            return image, Modal(visible=False), Modal(visible=True), None, "", None, gr.update(value=[])
        else:
            return image, Modal(visible=True), Modal(visible=False), face_images, str(face_count), current_faces_info, blur_faces_ids #
        
def blur_selected_faces(image, blur_faces_ids, faces_info, face_img, faces_count): # is_blurred
    if not blur_faces_ids:
        return image, Modal(visible=True), face_img, faces_count, blur_faces_ids # is_blurred
        
    faces = faces_info.value
    parsed_faces_ids = blur_faces_ids
    parsed_faces_ids = [f"face_{val.split(':')[-1].strip()}" for val in parsed_faces_ids]
    
    # Base blur amount and bounds
    MIN_BLUR = 31  # Minimum blur amount (must be odd)
    MAX_BLUR = 131  # Maximum blur amount (must be odd)
    
    blurring_start = time.time()
    # Process each face
    face_count = 0
    if faces and isinstance(faces, dict):
        
        # blur by id
        for face_key in parsed_faces_ids:
            face_count += 1
            try:
                face_data = faces[face_key]
            except KeyError:
                gr.Warning(f"⚠️ Face ID {face_key.split('_')[-1]} not found in detected faces.",  duration=5)
                return image, Modal(visible=True), face_img, faces_count, blur_faces_ids # is_blurred

            # Get bounding box coordinates
            x1, y1, x2, y2 = face_data['facial_area']
            
            # Calculate face region size
            face_width = x2 - x1
            face_height = y2 - y1
            face_size = max(face_width, face_height)
            
            # Calculate adaptive blur amount based on face size
            # Scale blur amount between MIN_BLUR and MAX_BLUR based on face size
            # Using image width as reference for scaling
            img_width = image.shape[1]
            blur_amount = int(MIN_BLUR + (MAX_BLUR - MIN_BLUR) * (face_size / img_width))
            
            # Ensure blur amount is odd
            blur_amount = blur_amount if blur_amount % 2 == 1 else blur_amount + 1
            # Ensure within bounds
            blur_amount = max(MIN_BLUR, min(MAX_BLUR, blur_amount))
            
            # Ensure the coordinates are within the image boundaries
            ih, iw = image.shape[:2]
            x1, y1 = max(0, x1), max(0, y1)
            x2, y2 = min(iw, x2), min(ih, y2)
            
            # Extract face region
            face_region = image[y1:y2, x1:x2]
            
            # Apply blur
            blurred_face = cv2.GaussianBlur(face_region, (blur_amount, blur_amount), 0)
            
            # Replace face region with blurred version
            image[y1:y2, x1:x2] = blurred_face
    
    blurring_time = time.time() - blurring_start
    # Print timing information
    print(f"Face blurring performance metrics:")
    print(f"Face blurring time: {blurring_time:.4f} seconds")
    
    if face_count == 0:
        return image, Modal(visible=True), face_img, faces_count, blur_faces_ids
    else:
        return image, Modal(visible=False), None, None, gr.update(value=[])

def blur_all_faces(image):
    if image is None:
        return None, Modal(visible=False)
    else:
        # Base blur amount and bounds
        MIN_BLUR = 31  # Minimum blur amount (must be odd)
        MAX_BLUR = 131  # Maximum blur amount (must be odd)
        
        # Start timer
        start_time = time.time()
        
        # Detect faces using RetinaFace
        detection_start = time.time()
        faces = RetinaFace.detect_faces(image)
        detection_time = time.time() - detection_start
        
        # Create a copy of the image
        output_image = image.copy()
        
        face_count = 0
        blurring_start = time.time()
        
        # Process each face
        if faces and isinstance(faces, dict):
            for face_key in faces:
                face_count += 1
                face_data = faces[face_key]
                
                # Get bounding box coordinates
                x1, y1, x2, y2 = face_data['facial_area']
                
                # Calculate face region size
                face_width = x2 - x1
                face_height = y2 - y1
                face_size = max(face_width, face_height)
                
                # Calculate adaptive blur amount based on face size
                # Scale blur amount between MIN_BLUR and MAX_BLUR based on face size
                # Using image width as reference for scaling
                img_width = image.shape[1]
                blur_amount = int(MIN_BLUR + (MAX_BLUR - MIN_BLUR) * (face_size / img_width))
                
                # Ensure blur amount is odd
                blur_amount = blur_amount if blur_amount % 2 == 1 else blur_amount + 1
                # Ensure within bounds
                blur_amount = max(MIN_BLUR, min(MAX_BLUR, blur_amount))
                
                # Ensure the coordinates are within the image boundaries
                ih, iw = image.shape[:2]
                x1, y1 = max(0, x1), max(0, y1)
                x2, y2 = min(iw, x2), min(ih, y2)
                
                # Extract face region
                face_region = output_image[y1:y2, x1:x2]
                
                # Apply blur
                blurred_face = cv2.GaussianBlur(face_region, (blur_amount, blur_amount), 0)
                
                # Replace face region with blurred version
                output_image[y1:y2, x1:x2] = blurred_face
        
        blurring_time = time.time() - blurring_start
        total_time = time.time() - start_time
        # Print timing information
        print(f"Face blurring performance metrics:")
        print(f"Total faces detected: {face_count}")
        print(f"Face detection time: {detection_time:.4f} seconds")
        print(f"Face blurring time: {blurring_time:.4f} seconds")
        print(f"Total processing time: {total_time:.4f} seconds")
        print(f"Average time per face: {(total_time/max(1, face_count)):.4f} seconds")

        if face_count == 0:
            return image, Modal(visible=True)
        else:
            return output_image, Modal(visible=False)
        
def unhide_faces(img, ori_img): # is_blurred
    if img is None:
        return None
    elif np.array_equal(img, ori_img.value):
        return img # is_blurred
    else:
        return ori_img.value
    
def check_exclude_fn(image):
    if image is None:
        gr.Warning("⚠️ No image to exclude.")
        return gr.update(visible=False)
    else:
        return gr.update(visible=True)
    
def has_user_json(username, country,language_choice, local_ds_directory_path):
    """Check if JSON files exist for username pattern."""
    return bool(glob.glob(os.path.join(local_ds_directory_path, "logged_in_users", country, language_choice, username, "**", "*.json"), recursive=True))