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+import os
+import streamlit as st
+import firebase_admin
+from firebase_admin import credentials, db, auth
+import face_recognition
+from PIL import Image
+import numpy as np
+import cv2
+import dlib
+
+# Get the current working directory
+current_directory = os.path.dirname(os.path.abspath(__file__))
+skp_path = os.path.join(current_directory, "projectinsta-s-firebase-adminsdk-y6vlu-9a1345f468.json")
+
+# Check if the app is already initialized
+if not firebase_admin._apps:
+    # Initialize Firebase Admin SDK
+    cred = credentials.Certificate(skp_path)
+    firebase_admin.initialize_app(cred, {
+        'databaseURL': 'https://projectinsta-s-default-rtdb.firebaseio.com/',
+        'projectId': 'projectinsta-s'
+    })
+
+# Reference to the root of your Firebase Realtime Database
+ref = db.reference('/')
+
+# Streamlit session state
+if "auth_state" not in st.session_state:
+    st.session_state.auth_state = {
+        "user": None,
+        "signed_in": False,
+    }
+
+# Add the shape predictor model for face alignment
+shape_predictor_path = "shape_predictor_68_face_landmarks.dat"
+detector = dlib.get_frontal_face_detector()
+shape_predictor = dlib.shape_predictor(shape_predictor_path)
+
+# Firebase Authentication
+def authenticate_user(email, password):
+    try:
+        user = auth.get_user_by_email(email)
+        # The user is successfully fetched, meaning the email and password are valid.
+        return True, user
+    except auth.AuthError as e:
+        print(f"Authentication error: {str(e)}")
+        return False, None
+        
+# Sign-up Functionality
+def create_user(email, password):
+    try:
+        user = auth.create_user(
+            email=email,
+            password=password
+        )
+        return True, user.uid
+    except Exception as e:
+        print(f"User creation error: {str(e)}")
+        return False, None
+        
+# Update load_and_encode function to use the aligned face without normalization
+def load_and_encode(image_path):
+    try:
+        aligned_face = detect_and_align_faces(image_path)
+
+        if aligned_face is not None:
+            encoding = face_recognition.face_encodings(aligned_face)
+
+            if encoding:
+                return encoding
+            else:
+                return None
+        else:
+            return None
+    except Exception as e:
+        print(f"Error loading and encoding image: {str(e)}")
+        return None
+
+# Function to detect and align faces in an image with preprocessing
+def detect_and_align_faces(image_path):
+    image = face_recognition.load_image_file(image_path)
+    
+    # Resize the image to a fixed width (you can adjust the width as needed)
+    target_width = 800
+    aspect_ratio = image.shape[1] / image.shape[0]
+    target_height = int(target_width / aspect_ratio)
+    resized_image = cv2.resize(image, (target_width, target_height))
+
+    gray = cv2.cvtColor(resized_image, cv2.COLOR_BGR2GRAY)
+    
+    # Detect faces using dlib
+    faces = detector(gray)
+
+    if not faces:
+        return None
+
+    # Use the first face found (you can modify this to handle multiple faces)
+    face = faces[0]
+    
+    # Use dlib for face alignment
+    landmarks = shape_predictor(gray, face)
+    aligned_face = dlib.get_face_chip(resized_image, landmarks, size=256)  # Adjust the size as needed
+    
+    return aligned_face
+
+# Add person to database
+def add_person(name, image_path, instagram_handle):
+    try:
+        encoding = load_and_encode(image_path)
+        if not encoding:
+            return "No face found in the provided image."
+
+        # Convert NumPy arrays to lists for JSON serialization
+        encoding = encoding[0].tolist()
+
+        # Save data to Firebase Realtime Database
+        ref.child(name).set({
+            "encoding": encoding,
+            "info": {
+                "instagram_handle": instagram_handle,
+                "instagram_link": f"https://www.instagram.com/{instagram_handle}/"
+            }
+        })
+
+        return f"Success: {name} added to the database!"
+    except Exception as e:
+        return f"Failed to add person: {str(e)}"
+
+# Recognize face from image
+def recognize_face(image_path):
+    if not image_path:
+        return "Please upload an image."
+
+    try:
+        unknown_encoding = load_and_encode(image_path)
+        if not unknown_encoding:
+            return "No face found in the provided image."
+
+        matches = []
+        for name, data in ref.get().items():
+            known_encoding = np.array(data["encoding"])
+            if face_recognition.compare_faces([known_encoding], unknown_encoding[0])[0]:
+                matches.append((name, data["info"]))
+
+        if matches:
+            results = []
+            for name, info in matches:
+                insta_handle = info["instagram_handle"]
+                insta_link = info["instagram_link"]
+                insta_link_html = f'<a href="{insta_link}" target="_blank"><font color="red">{insta_handle}</font></a>'
+                results.append(f"- It's a picture of {name}! Insta handle: {insta_link_html}")
+            return "\n".join(results)
+        else:
+            return "Face not found in the database."
+    except Exception as e:
+        return f"Failed to recognize face: {str(e)}"
+
+# Recognize face from image and return optimal or highest matching ID
+def recognize_face_optimal(image_path):
+    if not image_path:
+        return "Please upload an image."
+
+    try:
+        unknown_encoding = load_and_encode(image_path)
+        if not unknown_encoding:
+            return "No face found in the provided image."
+
+        matches = []
+        for name, data in ref.get().items():
+            known_encoding = np.array(data["encoding"])
+            similarity_score = face_recognition.face_distance([known_encoding], unknown_encoding[0])[0]
+            matches.append((name, similarity_score))
+
+        if matches:
+            best_match = min(matches, key=lambda x: x[1])
+            best_name, best_score = best_match
+            info = ref.child(best_name).child("info").get()
+            insta_handle = info["instagram_handle"]
+            insta_link = info["instagram_link"]
+            insta_link_html = f'<a href="{insta_link}" target="_blank"><font color="red">{insta_handle}</font></a>'
+            return f"Best match: {best_name} with a similarity score of {1 - best_score:.2%}. Insta handle: {insta_link_html}"
+        else:
+            return "Face not found in the database."
+    except Exception as e:
+        return f"Failed to recognize face: {str(e)}"
+
+# Delete person from database
+def delete_person(name):
+    try:
+        ref.child(name).delete()
+        return f"{name} deleted from the database!"
+    except Exception as e:
+        return f"Failed to delete person: {str(e)}"
+
+# Streamlit interface for adding a person
+def add_person_ui():
+    st.title("Add Person")
+    name = st.text_input("Enter Name", help="Enter the name of the person")
+    image_path = st.file_uploader("Upload Image", help="Upload an image containing the person's face")
+    instagram_handle = st.text_input("Enter Instagram Handle", help="Enter the person's Instagram handle")
+    if st.button("Add Person"):
+        if not name or not image_path or not instagram_handle:
+            st.error("Please fill all the fields.")
+        else:
+            result = add_person(name, image_path, instagram_handle)
+            st.success(result)
+
+# Streamlit interface for recognizing face
+def recognize_face_ui():
+    st.title("Recognize Face")
+    image_path = st.file_uploader("Upload Image", help="Upload an image for face recognition")
+    if st.button("Recognize Face"):
+        result = recognize_face(image_path)
+        st.write(result, unsafe_allow_html=True)
+
+# Streamlit interface for recognizing face with optimal ID
+def recognize_face_optimal_ui():
+    st.title("Recognize Face (Optimal)")
+    image_path = st.file_uploader("Upload Image", help="Upload an image for optimal face recognition")
+    if st.button("Recognize Face (Optimal)"):
+        result = recognize_face_optimal(image_path)
+        st.write(result, unsafe_allow_html=True)
+        
+# Streamlit interface for deleting a person
+def delete_person_ui():
+    st.title("Delete Person")
+    name = st.text_input("Enter Name", help="Enter the name of the person to delete")
+    if st.button("Delete Person"):
+        if not name:
+            st.error("Please enter a name.")
+        else:
+            result = delete_person(name)
+            st.success(result)
+
+def tour_guide_ui():
+    st.title("Tour Guide")
+    st.markdown("This tour will guide you through the application.")
+
+    with st.expander("Welcome"):
+        st.write("This is a tour guide to help you navigate through the application.")
+
+    with st.expander("Options Sidebar"):
+        st.write("Here you can select different options such as adding a person, recognizing a face, deleting a person, or recognizing a face with optimal identification.")
+
+    with st.expander("Main Interface"):
+        st.write("This is where the main functionality of the application is displayed.")
+
+    with st.expander("Upload Image"):
+        st.write("You can upload an image here for face recognition or adding a person.")
+
+    with st.expander("Text Input"):
+        st.write("Enter text here such as the person's name or Instagram handle.")
+
+    with st.expander("Buttons"):
+        st.write("Click on these buttons to perform actions like adding a person or recognizing a face.")
+
+# Streamlit interface for user authentication
+def authenticate_user_ui():
+    st.title("Insta's EYE")
+    st.sidebar.title("Options")
+
+    if st.session_state.auth_state["signed_in"]:
+        st.sidebar.button("Sign Out", on_click=logout)
+        st.title("Welcome!")
+        main()
+    else:
+        option = st.sidebar.radio("Select Option", ["Login", "Sign-Up"])
+
+        email = st.text_input("Enter Email", help="Enter your email address")
+        password = st.text_input("Enter Password", type="password", help="Enter your password")
+
+        if option == "Login":
+            if st.button("Login"):
+                if not email or not password:
+                    st.error("Please enter both email and password.")
+                else:
+                    success, user = authenticate_user(email, password)
+                    if success:
+                        st.session_state.auth_state["user"] = user
+                        st.session_state.auth_state["signed_in"] = True
+                        st.success("Authentication successful! You can now manage your set of images and profiles.")
+                        main()
+                    else:
+                        st.error("Authentication failed. Please check your email and password.")
+
+        elif option == "Sign-Up":
+            confirm_password = st.text_input("Confirm Password", type="password", help="Re-enter your password for confirmation")
+            if st.button("Sign-Up"):
+                if not email or not password or not confirm_password:
+                    st.error("Please fill all the fields.")
+                elif password != confirm_password:
+                    st.error("Passwords do not match.")
+                else:
+                    success, uid = create_user(email, password)
+                    if success:
+                        st.success(f"User with UID: {uid} created successfully! You can now log in.")
+                    else:
+                        st.error("User creation failed. Please try again.")
+
+# Log out user
+def logout():
+    st.session_state.auth_state["user"] = None
+    st.session_state.auth_state["signed_in"] = False
+
+# Define tour steps
+steps = [
+    {
+        "title": "Welcome to Insta's EYE",
+        "content": "This is a tour guide to help you navigate through the application.",
+    },
+    {
+        "title": "Options Sidebar",
+        "content": "Here you can select different options such as adding a person, recognizing a face, deleting a person, or recognizing a face with optimal identification.",
+    },
+    {
+        "title": "Main Interface",
+        "content": "This is where the main functionality of the application is displayed.",
+    },
+    {
+        "title": "Upload Image",
+        "content": "You can upload an image here for face recognition or adding a person.",
+    },
+    {
+        "title": "Text Input",
+        "content": "Enter text here such as the person's name or Instagram handle.",
+    },
+    {
+        "title": "Buttons",
+        "content": "Click on these buttons to perform actions like adding a person or recognizing a face.",
+    },
+]
+    
+# Function to display tour steps
+def display_tour_steps(steps):
+    st.markdown("# Tour Guide")
+    st.markdown("This tour will guide you through the application.")
+    st.markdown("---")
+
+    for step in steps:
+        st.markdown(f"## {step['title']}")
+        st.write(step['content'])
+        st.markdown("---")
+    
+# Update the main function to include the new option
+def main():
+    st.sidebar.title("Options")
+    option = st.sidebar.radio("Select Option", ["Add Person", "Recognize Face", "Delete Person", "Recognize Face (Optimal)","Tour Guide"])
+    
+    if option == "Add Person":
+        add_person_ui()
+    elif option == "Recognize Face":
+        recognize_face_ui()
+    elif option == "Delete Person":
+        delete_person_ui()
+    elif option == "Recognize Face (Optimal)":
+        recognize_face_optimal_ui()
+    elif option == "Tour Guide":
+        tour_guide_ui()
+
+# Run the tour guide
+if __name__ == "__main__":
+    authenticate_user_ui()