app.py

import streamlit as st
import time
import uuid
import json
from sklearn.feature_extraction.text import TfidfVectorizer
from sklearn.metrics.pairwise import cosine_similarity
import numpy as np
import streamlit.components.v1 as components

# ==========================================
# 1. PAGE CONFIGURATION
# ==========================================
st.set_page_config(
    page_title="CodeAlpha | FAQ Assistant",
    page_icon="favicon.ico",
    layout="wide",
    initial_sidebar_state="expanded"
)

# ==========================================
# 2. CORE NLP ENGINE & DATABASE (100% COMPLETE)
# ==========================================
FAQ_DATABASE = [
    # --- GREETINGS & PLEASANTRIES ---
    {"question": "Hi", "answer": "Hello! I am the CodeAlpha AI Assistant. How can I help you with your internship today?", "tags": "hi hi! hello hello! hey greetings hi there hello there whats up"},
    {"question": "Good Morning", "answer": "Good morning! I am the CodeAlpha AI Assistant. How can I assist you today?", "tags": "good morning morning greetings"},
    {"question": "Good Afternoon", "answer": "Good afternoon! I hope your day is going well. How can I help you with your CodeAlpha tasks?", "tags": "good afternoon noon greetings"},
    {"question": "Good Evening", "answer": "Good evening! How can I assist you with your CodeAlpha internship today?", "tags": "good evening evening greetings"},
    {"question": "Good Night", "answer": "Good night! Make sure to get some rest. I'll be here when you need help tomorrow.", "tags": "good night sleep sweet dreams"},
    {"question": "Nice to meet you", "answer": "Nice to meet you too! I'm here to help you navigate your CodeAlpha journey. What would you like to know?", "tags": "nice to meet you glad to meet you how are you doing pleased to meet you"},
    {"question": "Thank you", "answer": "You're very welcome! If you have any more questions about the CodeAlpha internship, feel free to ask.", "tags": "thank you thanks appreciate it grateful thanks a lot much appreciated"},
    {"question": "Bye", "answer": "Goodbye! Feel free to return if you have more questions. Best of luck with your CodeAlpha tasks!", "tags": "bye goodbye see you later take care exit farewell"},

    # --- CORE COMPANY & ASSISTANT IDENTITY ---
    {"question": "What is your name?", "answer": "I am the CodeAlpha AI Assistant, designed to help you with your internship and platform queries.", "tags": "name who are you identity your name called bot chatbot"},
    {"question": "What is CodeAlpha?", "answer": "CodeAlpha is a leading software development company dedicated to driving innovation and excellence across emerging technologies.", "tags": "codealpha about what it does company overview software development"},
    {"question": "How do I apply for an internship?", "answer": "To apply for an internship, visit the official internship portal, explore the available opportunities, and submit your application with the required details. Ensure that your profile, resume, and relevant skills are up to date to maximize your chances of selection. Once submitted, applicants may be contacted for further evaluation and onboarding processes.", "tags": "apply application internship registration enroll join opportunity candidate resume selection onboarding"},
    {"question": "What is the official internship portal of CodeAlpha?", "answer": "The official internship portal of CodeAlpha is https://www.codealpha.tech/.", "tags": "CodeAlpha official internship portal website application tech link"},
    {"question": "What technologies are used?", "answer": "The internship program provides exposure to a wide range of modern technologies, including Artificial Intelligence, Machine Learning, Data Science, Web Development, Python Programming, Cloud Computing, and other industry-relevant tools. The specific technologies may vary depending on the selected domain and project requirements, ensuring practical and hands-on learning experiences.", "tags": "technologies tools tech stack python artificial intelligence machine learning data science web development cloud computing programming skills"},
    {"question": "Who is the owner of CodeAlpha?", "answer": "Mr. Abhay Agnihotri (also known as Abhay Kumar) is the founder and owner of CodeAlpha, an Edtech platform providing virtual internships and global hands-on software development experiences to students.", "tags": "owner founder who owns codealpha creator abhay agnihotri abhay kumar"},
    {"question": "What can you do or who are you?", "answer": "I am the CodeAlpha AI Assistant. I can help you understand the internship overview, guide you through task submissions (Tasks 1 to 4), check verified certificates, and provide instant support for platform queries.", "tags": "what can you do help features list capability skills bot tools"},
    {"question": "What is the official CodeAlpha website?", "answer": "The official CodeAlpha website is www.codealpha.tech.", "tags": "website web link site url official"},
    {"question": "How do I contact support?", "answer": "You can reach CodeAlpha on WhatsApp at +91 9336576683 or email services@codealpha.tech.", "tags": "whatsapp phone number email address contact support help reach message"},

    # --- INTERNSHIP & TASKS ---
    {"question": "What happens if my code has bugs or fails the evaluation?", "answer": "Don't worry! Internships are for learning. If your task has minor issues or bugs, our mentors will provide structural feedback, and you can re-submit the clean version before the final evaluation timeline.", "tags": "bugs fail evaluation error wrong code reject mistake rewrite resubmit correction"},
    {"question": "Can I change my chosen task track after starting?", "answer": "Yes, you are completely free to switch or choose any of the listed tasks (Tasks 1 to 4) depending on your evolving tech interest. Just make sure to submit the minimum required count.", "tags": "change track switch task dynamic choose move domain python java ml"},
    {"question": "What if I miss the deadline due to university exams or medical emergencies?", "answer": "We understand that academic schedules and emergencies happen. You can request a deadline extension by writing a formal mail to services@codealpha.tech along with valid proof.", "tags": "miss deadline exam college university medical emergency sick extend extension delay left"},
    {"question": "Is prior experience or a high CGPA required to pass the internship?", "answer": "No. CodeAlpha values self-driven learning and practical execution over grades. As long as you complete your tasks honestly and follow the presentation guidelines, you will pass smoothly.", "tags": "gpa cgpa marks criteria eligibility basic fresher beginner struggle pass criteria threshold"},
    {"question": "How can I display this internship on my resume or LinkedIn to impress recruiters?", "answer": "You can list your role as 'Artificial Intelligence Intern at CodeAlpha'. Highlight your hands-on projects (like Object Detection or Machine Translation Tool), link your GitHub repository, and attach your QR-verified certificate.", "tags": "resume CV profile linkedin share recruiter job hire showcase display portfolio build highlight"},
    {"question": "Does CodeAlpha provide full-time job offers (PPO) based on performance?", "answer": "Yes! Exceptional interns who showcase stellar coding ethics, clean project documentation, and proactive community engagement are fast-tracked into our talent pool for future placement opportunities and full-time job offers (PPO).", "tags": "job full time ppo placement offer career package salary corporate selection hire bonus"},
    {"question": "What criteria are used to write the Letter of Recommendation (LOR)?", "answer": "The Letter of Recommendation (LOR) is awarded to top-performing interns who complete all 4 tasks with outstanding code quality, modular documentation, and excellent video explanations on LinkedIn.", "tags": "lor letter of recommendation quality special merit elite list selection benchmark top intern bonus"},
    {"question": "Do I have to use standard libraries or can I implement custom deep learning frameworks?", "answer": "You are free to innovate! While Task 2 mentions basic matching models, you can scale it up using PyTorch, TensorFlow, Hugging Face Transformers, or custom state-of-the-art NLP pipelines as long as the core system remains functional.", "tags": "pytorch tensorflow deep learning advanced models custom transformer code framework library scale backend"},
    {"question": "My dataset for Task 3 or 4 is too large to push to GitHub. What should I do?", "answer": "Never upload large data binaries or raw dataset folders directly to GitHub. Add your dataset folder to your `.gitignore` file, and instead provide a download script or a clear cloud storage link (Google Drive/Kaggle) in your `README.md` file.", "tags": "large dataset gitignore file data push block error binary size limit heavy files drive link"},
    {"question": "Can I host or deploy my app on Streamlit Cloud or Hugging Face Spaces for submission?", "answer": "Absolutely! Deploying your tool on live web platforms like Streamlit Community Cloud, Vercel, or Hugging Face Spaces is highly encouraged and adds significant value to your final evaluation score.", "tags": "host deploy cloud live link web server publish deployment huggingface vercel online production access"},
    {"question": "Can I submit a project made by my classmate if we worked together as a team?", "answer": "No. All CodeAlpha internship tracks are strictly individual. While conceptual discussions are encouraged, sharing, copying, or duplicating source code directly will result in immediate disqualification for plagiarism.", "tags": "copy duplicate friend team classmate group work cheat generic identical matching plagiarism copycat"},
    {"question": "Is there any penalty if I complete only one task instead of the required minimum?", "answer": "Yes. To remain eligible for the final internship completion certificate, you must successfully deploy and submit a minimum of two or three tasks out of the four listed in the handbook.", "tags": "penalty submit one task fail shortcut minimum limit criteria safe skip dropout lazy boundary"},
    {"question": "Can I get my completion certificate early if I finish all tasks within 3 days?", "answer": "Certificates are processed systematically at the end of the official batch tenure to maintain verification synchronization. Early generation requests are not entertained to ensure strict evaluation equity.", "tags": "early fast speed certificate quickly urgent process processing batch end finish complete days wrap"},

    # --- TASK DETAILS ---
    {"question": "What is the AI internship overview?", "answer": "The internship provides hands-on experience in AI model development, machine learning workflows, and real-time data processing.", "tags": "overview learn do hands on machine learning artificial intelligence"},
    {"question": "What is Task 1?", "answer": "Task 1 is the Language Translation Tool. You must create a UI to enter text, select source and target languages, and display the translated response.", "tags": "task 1 language translation tool ui api google microsoft"},
    {"question": "What is Task 2?", "answer": "Task 2 is building a Chatbot for FAQs. You need to collect FAQs, preprocess the text, match intents, and display chatbot responses.", "tags": "task 2 chatbot faq nlp nltk spacy cosine similarity intent"},
    {"question": "What is Task 3?", "answer": "Task 3 is Music Generation with AI. You will collect MIDI data, preprocess it, and train a model to generate new music sequences.", "tags": "task 3 music generation ai midi rnn lstm gan"},
    {"question": "What is Task 4?", "answer": "Task 4 is Object Detection and Tracking. You must set up real-time video input, detect objects, and apply object tracking.", "tags": "task 4 object detection tracking opencv yolo bounding box"},
    
    # --- LOGISTICS & REQS ---
    {"question": "What are the perks of the internship?", "answer": "Perks include an Internship Offer Letter, Completion Certificate, Letter of Recommendation, Job Opportunities/Placement Support, and Resume Building Support.", "tags": "perks benefits get gain offer letter placement support"},
    {"question": "Is the completion certificate verified?", "answer": "Yes, the Completion Certificate includes a Unique ID and is QR Verified.", "tags": "certificate verified qr code unique id proof"},
    {"question": "What are the social media requirements?", "answer": "You must share your internship status on LinkedIn and tag @CodeAlpha.", "tags": "social media linkedin post tag share status"},
    {"question": "What are the GitHub repository requirements?", "answer": "You are required to upload your complete source code to GitHub in a repository named 'CodeAlpha_ProjectName'.", "tags": "github repo repository source code upload push name"},
    {"question": "Do I need to make a video for my submission?", "answer": "Yes, you must post a video explanation of your project on LinkedIn along with your GitHub repository link.", "tags": "video record explanation presentation post"},
    {"question": "Where do I submit my completed tasks?", "answer": "You must submit your completed tasks using the Submission Form that will be shared in your respective WhatsApp group.", "tags": "submit form link where how whatsapp"},
    {"question": "How many tasks must I complete to get a certificate?", "answer": "To be eligible for the internship certificate, you must complete a minimum of two or three tasks out of the four listed.", "tags": "tasks minimum complete pass requirement"},

    # --- SYSTEMIC ---
    {"question": "Is my conversation data stored or shared with third parties?", "answer": "Your conversation privacy is our priority. Your chat history is processed to provide you with immediate assistance and is not shared with any external third parties for marketing purposes.", "tags": "privacy data security third party policy private save store"},
    {"question": "How do I know if the internship portal is currently down?", "answer": "You can check the system status directly on our official website dashboard at www.codealpha.tech/status. If you face a blank screen, try clearing your browser cache.", "tags": "down status portal error server maintenance offline crash"},
    {"question": "Where can I report a wrong answer provided by this assistant?", "answer": "We are constantly training! Please report any incorrect responses by sending a screenshot to services@codealpha.tech with the subject 'Feedback: Chatbot'.", "tags": "report feedback wrong incorrect error fix improve report support"},
    {"question": "Can you solve my university exam questions or write my entire report from scratch?", "answer": "I am an assistant to guide you, structure your thoughts, and help with technical debugging. I cannot complete your academic assignments or reports entirely, as that would violate our 'Self-Driven Learning' policy.", "tags": "write assignment report exam university solve cheating academic honesty policy"},
    {"question": "How do I get a Letter of Recommendation?", "answer": "A Letter of Recommendation is provided based on your performance during the internship.", "tags": "lor letter of recommendation reference performance"},
        # --- ADDITIONAL RECOMMENDED FAQs ---
    {"question": "Who is eligible for the internship?", "answer": "Students, fresh graduates, and learners from any educational background who are interested in developing practical technical skills are eligible to apply.", "tags": "eligibility eligible who can apply student graduate fresher qualification criteria"},
    {"question": "Can first-year students apply?", "answer": "Yes, students from any academic year can apply if they are interested in learning and completing the internship tasks.", "tags": "first year beginner fresher eligibility student"},
    {"question": "Is the internship paid or unpaid?", "answer": "Please refer to the internship details provided for your specific batch, as compensation policies may vary depending on the program.", "tags": "paid unpaid stipend salary compensation money"},
    {"question": "Is there any registration fee?", "answer": "Please refer to the current internship announcement or contact support for information regarding any applicable registration fees.", "tags": "fee registration payment cost charges"},
    {"question": "Can international students apply?", "answer": "Yes, international applicants can participate if they meet the program requirements.", "tags": "international foreign global worldwide students"},
    {"question": "How do I join the internship WhatsApp group?", "answer": "After successful registration, instructions for joining the official WhatsApp group will be shared through the communication channels provided during onboarding.", "tags": "whatsapp group join link onboarding community"},
    {"question": "When will I receive my certificate?", "answer": "Certificates are generally issued after the internship batch ends and all submitted tasks have been reviewed successfully.", "tags": "certificate receive when issued delivery completion"},
    {"question": "I have not received my certificate. What should I do?", "answer": "If your certificate has not been received within the announced processing period, please contact support with your registered details for assistance.", "tags": "certificate missing not received delay pending support"},
    {"question": "How can I verify my certificate?", "answer": "Your certificate contains a QR code and Unique ID that can be used to verify its authenticity.", "tags": "verify certificate qr unique id validation authenticate"},
    {"question": "Can I resubmit a task after submission?", "answer": "Yes, if corrections are required and the submission window is still open, you may submit an updated version of your project.", "tags": "resubmit update modify task correction edit"},
    {"question": "What file formats are accepted for submission?", "answer": "Ensure your source code is uploaded to GitHub and provide all required links, documentation, and supporting materials as specified in the submission guidelines.", "tags": "file format upload submission github documentation requirements"},
    {"question": "My GitHub repository is private. Is that allowed?", "answer": "No. Evaluators must be able to access your project repository. Please ensure the repository visibility follows the internship guidelines.", "tags": "private github repository public access visibility permissions"},
    {"question": "Can I use AI tools like ChatGPT during the internship?", "answer": "Yes, AI tools may be used for learning, debugging, and research. However, all submitted work must be understood, customized, and completed by you.", "tags": "chatgpt ai tools copilot assistance help learning"},
    {"question": "Can I use external datasets for my project?", "answer": "Yes, publicly available datasets may be used provided they are properly referenced in your project documentation.", "tags": "dataset kaggle public data external dataset source"},
    {"question": "Can I submit projects developed using any programming language?", "answer": "Unless a specific technology is required for a task, you may use the programming language and framework best suited to your project.", "tags": "programming language python java c++ javascript framework technology"},
    {"question": "How can I track my internship progress?", "answer": "Keep track of completed tasks, GitHub uploads, LinkedIn posts, and submission confirmations to monitor your internship progress effectively.", "tags": "progress status tracking monitor completed tasks internship"},
    {"question": "How do I know if my submission was successful?", "answer": "You should receive a confirmation after submitting through the official submission process. Keep a record of your submission details for future reference.", "tags": "submission successful confirmation submitted received acknowledgment"},
    {"question": "Will I get placement assistance?", "answer": "Eligible interns may receive placement support and career guidance based on program policies and overall performance.", "tags": "placement assistance jobs career support opportunities recruitment"},
    {"question": "Can I do multiple internship domains at the same time?", "answer": "Please follow the guidelines of your enrolled program. If multiple domains are permitted, ensure you can successfully complete all required tasks and commitments.", "tags": "multiple domains tracks simultaneously parallel internship"},
    {"question": "How long is the internship duration?", "answer": "The internship duration depends on the batch and program you have enrolled in. Please refer to your onboarding details or official announcements for the exact timeline.", "tags": "duration period internship length timeline batch"},
    {"question": "What should I do if I face technical issues during submission?", "answer": "If you encounter technical issues during submission, contact support immediately and provide screenshots or error details to help resolve the issue quickly.", "tags": "technical issue submission error problem support troubleshooting"},
    {"question": "Can I update my LinkedIn post after submission?", "answer": "Yes, you may update your LinkedIn post if necessary, provided that all required internship information remains clearly visible.", "tags": "linkedin update edit modify social media post"},
    {"question": "Do I need a GitHub account for the internship?", "answer": "Yes, a GitHub account is required for hosting and sharing your project source code as part of the internship submission process.", "tags": "github account required repository source code version control"},

    # --- Account & Registration ---
    {"question": "I entered the wrong email during registration. What should I do?", "answer": "Please contact support as soon as possible with your correct details so that your registration information can be updated.", "tags": "wrong email registration update change email correction"},
    {"question": "Can I update my personal information after registration?", "answer": "Yes, contact support with the necessary details if you need to update your registered information.", "tags": "update profile edit personal information name email phone"},

    # --- Offer Letter ---
    {"question": "When will I receive my offer letter?", "answer": "Offer letters are generally shared after successful registration and onboarding. Please check the communication channels provided during registration.", "tags": "offer letter receive when internship offer"},
    {"question": "How can I verify my offer letter?", "answer": "If verification features are provided, follow the instructions mentioned on the offer letter or contact support for assistance.", "tags": "offer letter verify validation authenticity"},

    # --- Submission & Evaluation ---
    {"question": "How are projects evaluated?", "answer": "Projects are evaluated based on functionality, code quality, documentation, originality, and adherence to the task requirements.", "tags": "evaluation criteria review assessment grading"},
    {"question": "What happens after I submit my tasks?", "answer": "Your submission will be reviewed by the evaluation team. Eligible interns will receive further updates regarding certification and internship completion.", "tags": "after submission review evaluation next step"},

    # --- Certificates & LOR ---
    {"question": "Is the Letter of Recommendation guaranteed?", "answer": "No. The Letter of Recommendation is awarded based on exceptional performance and fulfillment of the specified criteria.", "tags": "lor guaranteed recommendation eligibility"},
    {"question": "Will my certificate mention my performance?", "answer": "Certificate details depend on the internship policies and certificate format used for your batch.", "tags": "certificate performance grade distinction mention"},

    # --- Projects ---
    {"question": "Can I create my own project instead of the listed tasks?", "answer": "Please follow the internship guidelines. If custom projects are permitted, they should align with the internship objectives and receive approval if required.", "tags": "custom project own project alternative task"},
    {"question": "Can I use open-source code in my project?", "answer": "Yes, provided that you comply with the license terms and clearly acknowledge the source. The majority of the project should reflect your own work.", "tags": "open source code github reuse license attribution"},

    # --- Frequently Asked Human Questions ---
    {"question": "Are there any live sessions or mentorship sessions?", "answer": "Please refer to your batch announcements and official communication channels for information regarding live sessions and mentorship activities.", "tags": "live session mentor mentorship webinar meeting"},
    {"question": "Will I receive internship support if I get stuck?", "answer": "Yes, support is available through the designated communication channels and internship community groups.", "tags": "help support stuck doubt guidance mentor"},
    {"question": "Can I leave the internship after joining?", "answer": "Participation is voluntary. However, leaving before completing the requirements may affect eligibility for internship benefits and certification.", "tags": "leave quit withdraw cancel internship"},

    # --- One Very Important Missing Intent ---
    {"question": "How do I check whether my certificate is verified?", "answer": "You can verify your certificate using the QR code or verification mechanism provided on the certificate.", "tags": "check certificate verify validation authentic genuine qr"},

    # --- Internship Status & Acceptance ---
    {"question": "How do I know if I have been selected for the internship?", "answer": "You will receive an official confirmation through the communication channels used during registration. Please monitor your email and other onboarding notifications.", "tags": "selected selection accepted acceptance application status"},
    {"question": "My application is still pending. What should I do?", "answer": "Application reviews may take time. If you have not received an update within the expected timeframe, please contact support.", "tags": "pending application review status waiting"},

    # --- WhatsApp Group Issues ---
    {"question": "I joined the internship but did not receive the WhatsApp group link.", "answer": "Please contact support with your registration details so the team can verify your enrollment and assist you.", "tags": "whatsapp group link missing not received join"},
    {"question": "I accidentally left the WhatsApp group. What should I do?", "answer": "Contact support and provide your registration details to request assistance with rejoining the group.", "tags": "left whatsapp group rejoin join again"},

    # --- GitHub & Submission ---
    {"question": "Can I submit more than the required number of tasks?", "answer": "Yes, submitting additional tasks may help showcase your skills and dedication.", "tags": "extra task additional tasks more than required"},
    {"question": "Can I change my GitHub repository after submission?", "answer": "If updates are necessary and the submission window remains open, you may provide the updated repository information according to the submission guidelines.", "tags": "change github repository update submission"},

    # --- LinkedIn ---
    {"question": "Do I need a LinkedIn account for the internship?", "answer": "A LinkedIn account is recommended because certain internship activities may require project sharing and professional networking.", "tags": "linkedin account required social media"},
    {"question": "What should I include in my LinkedIn post?", "answer": "Include a brief description of your project, relevant internship details, your GitHub repository link, and any required tags or mentions.", "tags": "linkedin post content description github project"},

    # --- Technical Support ---
    {"question": "What should I do if my GitHub link is not working?", "answer": "Verify that the repository is accessible, the URL is correct, and the repository visibility matches the submission requirements.", "tags": "github link broken invalid repository access"},
    {"question": "What should I do if my deployed project is not working?", "answer": "Check your deployment logs, verify all required dependencies, and update the deployment before final submission.", "tags": "deployment issue project not working hosted app error"},

    # --- Internship Completion ---
    {"question": "How do I know if I have successfully completed the internship?", "answer": "Successful completion depends on meeting all internship requirements, submitting the required tasks, and passing the evaluation process.", "tags": "completed internship completion status finished"},
    {"question": "What happens if I do not complete the required tasks?", "answer": "Failure to complete the minimum required tasks may affect your eligibility for certification and other internship benefits.", "tags": "incomplete tasks fail requirement certificate eligibility"},

    # --- AI Assistant-Specific Questions ---
    {"question": "Can I ask technical questions about my project?", "answer": "Yes, the assistant can help explain concepts, provide guidance, and assist with debugging-related questions.", "tags": "technical help project support debugging coding"},
    {"question": "Can you review my project idea?", "answer": "Yes, I can provide feedback on project ideas and suggest possible improvements based on the internship requirements.", "tags": "project idea review feedback suggestion"},

    # --- One Category You're Missing Entirely ---
    {"question": "Who developed this assistant?", "answer": "This assistant was developed to help CodeAlpha interns access information, understand requirements, and receive instant support.", "tags": "developer creator made this assistant built chatbot"},
    {"question": "Are you a human or an AI?", "answer": "I am an AI-powered virtual assistant designed to provide information and support related to the CodeAlpha internship program.", "tags": "human ai bot chatbot artificial intelligence"},

    # ==========================================
    # --- ORIGINAL FAQ DATABASE (PRESERVED) ---
    # ==========================================

    # --- GREETINGS & PLEASANTRIES ---
    {"question": "Hi", "answer": "Hello! I am the CodeAlpha AI Assistant. How can I help you with your internship today?", "tags": "hi hi! hello hello! hey greetings hi there hello there whats up"},
    {"question": "Good Morning", "answer": "Good morning! I am the CodeAlpha AI Assistant. How can I assist you today?", "tags": "good morning morning greetings"},
    {"question": "Good Afternoon", "answer": "Good afternoon! I hope your day is going well. How can I help you with your CodeAlpha tasks?", "tags": "good afternoon noon greetings"},
    {"question": "Good Evening", "answer": "Good evening! How can I assist you with your CodeAlpha internship today?", "tags": "good evening evening greetings"},
    {"question": "Good Night", "answer": "Good night! Make sure to get some rest. I'll be here when you need help tomorrow.", "tags": "good night sleep sweet dreams"},
    {"question": "Nice to meet you", "answer": "Nice to meet you too! I'm here to help you navigate your CodeAlpha journey. What would you like to know?", "tags": "nice to meet you glad to meet you how are you doing pleased to meet you"},
    {"question": "Thank you", "answer": "You're very welcome! If you have any more questions about the CodeAlpha internship, feel free to ask.", "tags": "thank you thanks appreciate it grateful thanks a lot much appreciated"},
    {"question": "Bye", "answer": "Goodbye! Feel free to return if you have more questions. Best of luck with your CodeAlpha tasks!", "tags": "bye goodbye see you later take care exit farewell"},

    # --- CORE COMPANY & ASSISTANT IDENTITY ---
    {"question": "What is your name?", "answer": "I am the CodeAlpha AI Assistant, designed to help you with your internship and platform queries.", "tags": "name who are you identity your name called bot chatbot"},
    {"question": "What is CodeAlpha?", "answer": "CodeAlpha is a leading software development company dedicated to driving innovation and excellence across emerging technologies.", "tags": "codealpha about what it does company overview software development"},
    {"question": "How do I apply for an internship?", "answer": "To apply for an internship, visit the official internship portal, explore the available opportunities, and submit your application with the required details. Ensure that your profile, resume, and relevant skills are up to date to maximize your chances of selection. Once submitted, applicants may be contacted for further evaluation and onboarding processes.", "tags": "apply application internship registration enroll join opportunity candidate resume selection onboarding"},
    {"question": "What is the official internship portal of CodeAlpha?", "answer": "The official internship portal of CodeAlpha is https://www.codealpha.tech/.", "tags": "CodeAlpha official internship portal website application tech link"},
    {"question": "What technologies are used?", "answer": "The internship program provides exposure to a wide range of modern technologies, including Artificial Intelligence, Machine Learning, Data Science, Web Development, Python Programming, Cloud Computing, and other industry-relevant tools. The specific technologies may vary depending on the selected domain and project requirements, ensuring practical and hands-on learning experiences.", "tags": "technologies tools tech stack python artificial intelligence machine learning data science web development cloud computing programming skills"},
    {"question": "Who is the owner of CodeAlpha?", "answer": "Mr. Abhay Agnihotri (also known as Abhay Kumar) is the founder and owner of CodeAlpha, an Edtech platform providing virtual internships and global hands-on software development experiences to students.", "tags": "owner founder who owns codealpha creator abhay agnihotri abhay kumar"},
    {"question": "What can you do or who are you?", "answer": "I am the CodeAlpha AI Assistant. I can help you understand the internship overview, guide you through task submissions (Tasks 1 to 4), check verified certificates, and provide instant support for platform queries.", "tags": "what can you do help features list capability skills bot tools"},
    {"question": "What is the official CodeAlpha website?", "answer": "The official CodeAlpha website is www.codealpha.tech.", "tags": "website web link site url official"},
    {"question": "How do I contact support?", "answer": "You can reach CodeAlpha on WhatsApp at +91 9336576683 or email services@codealpha.tech.", "tags": "whatsapp phone number email address contact support help reach message"},

    # --- INTERNSHIP & TASKS ---
    {"question": "What happens if my code has bugs or fails the evaluation?", "answer": "Don't worry! Internships are for learning. If your task has minor issues or bugs, our mentors will provide structural feedback, and you can re-submit the clean version before the final evaluation timeline.", "tags": "bugs fail evaluation error wrong code reject mistake rewrite resubmit correction"},
    {"question": "Can I change my chosen task track after starting?", "answer": "Yes, you are completely free to switch or choose any of the listed tasks (Tasks 1 to 4) depending on your evolving tech interest. Just make sure to submit the minimum required count.", "tags": "change track switch task dynamic choose move domain python java ml"},
    {"question": "What if I miss the deadline due to university exams or medical emergencies?", "answer": "We understand that academic schedules and emergencies happen. You can request a deadline extension by writing a formal mail to services@codealpha.tech along with valid proof.", "tags": "miss deadline exam college university medical emergency sick extend extension delay left"},
    {"question": "Is prior experience or a high CGPA required to pass the internship?", "answer": "No. CodeAlpha values self-driven learning and practical execution over grades. As long as you complete your tasks honestly and follow the presentation guidelines, you will pass smoothly.", "tags": "gpa cgpa marks criteria eligibility basic fresher beginner struggle pass criteria threshold"},
    {"question": "How can I display this internship on my resume or LinkedIn to impress recruiters?", "answer": "You can list your role as 'Artificial Intelligence Intern at CodeAlpha'. Highlight your hands-on projects (like Object Detection or Machine Translation Tool), link your GitHub repository, and attach your QR-verified certificate.", "tags": "resume CV profile linkedin share recruiter job hire showcase display portfolio build highlight"},
    {"question": "Does CodeAlpha provide full-time job offers (PPO) based on performance?", "answer": "Yes! Exceptional interns who showcase stellar coding ethics, clean project documentation, and proactive community engagement are fast-tracked into our talent pool for future placement opportunities and full-time job offers (PPO).", "tags": "job full time ppo placement offer career package salary corporate selection hire bonus"},
    {"question": "What criteria are used to write the Letter of Recommendation (LOR)?", "answer": "The Letter of Recommendation (LOR) is awarded to top-performing interns who complete all 4 tasks with outstanding code quality, modular documentation, and excellent video explanations on LinkedIn.", "tags": "lor letter of recommendation quality special merit elite list selection benchmark top intern bonus"},
    {"question": "Do I have to use standard libraries or can I implement custom deep learning frameworks?", "answer": "You are free to innovate! While Task 2 mentions basic matching models, you can scale it up using PyTorch, TensorFlow, Hugging Face Transformers, or custom state-of-the-art NLP pipelines as long as the core system remains functional.", "tags": "pytorch tensorflow deep learning advanced models custom transformer code framework library scale backend"},
    {"question": "My dataset for Task 3 or 4 is too large to push to GitHub. What should I do?", "answer": "Never upload large data binaries or raw dataset folders directly to GitHub. Add your dataset folder to your `.gitignore` file, and instead provide a download script or a clear cloud storage link (Google Drive/Kaggle) in your `README.md` file.", "tags": "large dataset gitignore file data push block error binary size limit heavy files drive link"},
    {"question": "Can I host or deploy my app on Streamlit Cloud or Hugging Face Spaces for submission?", "answer": "Absolutely! Deploying your tool on live web platforms like Streamlit Community Cloud, Vercel, or Hugging Face Spaces is highly encouraged and adds significant value to your final evaluation score.", "tags": "host deploy cloud live link web server publish deployment huggingface vercel online production access"},
    {"question": "Can I submit a project made by my classmate if we worked together as a team?", "answer": "No. All CodeAlpha internship tracks are strictly individual. While conceptual discussions are encouraged, sharing, copying, or duplicating source code directly will result in immediate disqualification for plagiarism.", "tags": "copy duplicate friend team classmate group work cheat generic identical matching plagiarism copycat"},
    {"question": "Is there any penalty if I complete only one task instead of the required minimum?", "answer": "Yes. To remain eligible for the final internship completion certificate, you must successfully deploy and submit a minimum of two or three tasks out of the four listed in the handbook.", "tags": "penalty submit one task fail shortcut minimum limit criteria safe skip dropout lazy boundary"},
    {"question": "Can I get my completion certificate early if I finish all tasks within 3 days?", "answer": "Certificates are processed systematically at the end of the official batch tenure to maintain verification synchronization. Early generation requests are not entertained to ensure strict evaluation equity.", "tags": "early fast speed certificate quickly urgent process processing batch end finish complete days wrap"},

    # --- TASK DETAILS ---
    {"question": "What is the AI internship overview?", "answer": "The internship provides hands-on experience in AI model development, machine learning workflows, and real-time data processing.", "tags": "overview learn do hands on machine learning artificial intelligence"},
    {"question": "What is Task 1?", "answer": "Task 1 is the Language Translation Tool. You must create a UI to enter text, select source and target languages, and display the translated response.", "tags": "task 1 language translation tool ui api google microsoft"},
    {"question": "What is Task 2?", "answer": "Task 2 is building a Chatbot for FAQs. You need to collect FAQs, preprocess the text, match intents, and display chatbot responses.", "tags": "task 2 chatbot faq nlp nltk spacy cosine similarity intent"},
    {"question": "What is Task 3?", "answer": "Task 3 is Music Generation with AI. You will collect MIDI data, preprocess it, and train a model to generate new music sequences.", "tags": "task 3 music generation ai midi rnn lstm gan"},
    {"question": "What is Task 4?", "answer": "Task 4 is Object Detection and Tracking. You must set up real-time video input, detect objects, and apply object tracking.", "tags": "task 4 object detection tracking opencv yolo bounding box"},
    
    # --- LOGISTICS & REQS ---
    {"question": "What are the perks of the internship?", "answer": "Perks include an Internship Offer Letter, Completion Certificate, Letter of Recommendation, Job Opportunities/Placement Support, and Resume Building Support.", "tags": "perks benefits get gain offer letter placement support"},
    {"question": "Is the completion certificate verified?", "answer": "Yes, the Completion Certificate includes a Unique ID and is QR Verified.", "tags": "certificate verified qr code unique id proof"},
    {"question": "What are the social media requirements?", "answer": "You must share your internship status on LinkedIn and tag @CodeAlpha.", "tags": "social media linkedin post tag share status"},
    {"question": "What are the GitHub repository requirements?", "answer": "You are required to upload your complete source code to GitHub in a repository named 'CodeAlpha_ProjectName'.", "tags": "github repo repository source code upload push name"},
    {"question": "Do I need to make a video for my submission?", "answer": "Yes, you must post a video explanation of your project on LinkedIn along with your GitHub repository link.", "tags": "video record explanation presentation post"},
    {"question": "Where do I submit my completed tasks?", "answer": "You must submit your completed tasks using the Submission Form that will be shared in your respective WhatsApp group.", "tags": "submit form link where how whatsapp"},
    {"question": "How many tasks must I complete to get a certificate?", "answer": "To be eligible for the internship certificate, you must complete a minimum of two or three tasks out of the four listed.", "tags": "tasks minimum complete pass requirement"},

    # --- SYSTEMIC ---
    {"question": "Is my conversation data stored or shared with third parties?", "answer": "Your conversation privacy is our priority. Your chat history is processed to provide you with immediate assistance and is not shared with any external third parties for marketing purposes.", "tags": "privacy data security third party policy private save store"},
    {"question": "How do I know if the internship portal is currently down?", "answer": "You can check the system status directly on our official website dashboard at www.codealpha.tech/status. If you face a blank screen, try clearing your browser cache.", "tags": "down status portal error server maintenance offline crash"},
    {"question": "Where can I report a wrong answer provided by this assistant?", "answer": "We are constantly training! Please report any incorrect responses by sending a screenshot to services@codealpha.tech with the subject 'Feedback: Chatbot'.", "tags": "report feedback wrong incorrect error fix improve report support"},
    {"question": "Can you solve my university exam questions or write my entire report from scratch?", "answer": "I am an assistant to guide you, structure your thoughts, and help with technical debugging. I cannot complete your academic assignments or reports entirely, as that would violate our 'Self-Driven Learning' policy.", "tags": "write assignment report exam university solve cheating academic honesty policy"},
    {"question": "How do I get a Letter of Recommendation?", "answer": "A Letter of Recommendation is provided based on your performance during the internship.", "tags": "lor letter of recommendation reference performance"}
]

corpus = [f"{item['question']} {item['tags']}" for item in FAQ_DATABASE]
answers = [item['answer'] for item in FAQ_DATABASE]

def build_nlp_model():
    vectorizer = TfidfVectorizer(
        stop_words='english',
        ngram_range=(1, 2)
    )
    faq_vectors = vectorizer.fit_transform(corpus)
    return vectorizer, faq_vectors

vectorizer, faq_vectors = build_nlp_model()


def get_best_match(user_query, threshold=0.15):

    import re

    query = user_query.lower().strip()

    # Handle Task Questions
    task_match = re.search(r"task\s*(\d+)", query)

    if task_match:
        task_num = int(task_match.group(1))

        if task_num == 1:
            return "Task 1 is the Language Translation Tool. You must create a UI to enter text, select source and target languages, and display the translated response."

        elif task_num == 2:
            return "Task 2 is building a Chatbot for FAQs. You need to collect FAQs, preprocess the text, match intents, and display chatbot responses."

        elif task_num == 3:
            return "Task 3 is Music Generation with AI. You will collect MIDI data, preprocess it, and train a model to generate new music sequences."

        elif task_num == 4:
            return "Task 4 is Object Detection and Tracking. You must set up real-time video input, detect objects, and apply object tracking."

        else:
            return "Only Task 1, Task 2, Task 3, and Task 4 are available in the CodeAlpha AI Internship."

    # TF-IDF Matching
    query_vector = vectorizer.transform([query])
    similarities = cosine_similarity(query_vector, faq_vectors).flatten()

    best_match_index = np.argmax(similarities)

    if similarities[best_match_index] < threshold:
        return "I apologize, but I couldn't understand your question. Could you please rephrase it? I'll be happy to help you."

    return answers[best_match_index]

# ==========================================
# 3. STATE & HISTORY MANAGEMENT (SIDEBAR)
# ==========================================
if "chat_sessions" not in st.session_state:
    init_id = str(uuid.uuid4())
    st.session_state.chat_sessions = {
        init_id: {"title": "New Chat", "messages": [], "pinned": False, "timestamp": time.time()}
    }
    st.session_state.current_chat_id = init_id

if "pending_bot_response" not in st.session_state:
    st.session_state.pending_bot_response = None

def get_active_chat():
    if st.session_state.current_chat_id not in st.session_state.chat_sessions:
        if st.session_state.chat_sessions:
            st.session_state.current_chat_id = list(st.session_state.chat_sessions.keys())[0]
        else:
            new_id = str(uuid.uuid4())
            st.session_state.chat_sessions = {new_id: {"title": "New Chat", "messages": [], "pinned": False, "timestamp": time.time()}}
            st.session_state.current_chat_id = new_id
    return st.session_state.chat_sessions[st.session_state.current_chat_id]

active_chat = get_active_chat()

# ==========================================
# 4. STRICT HTML/CSS INJECTION 
# ==========================================
base_css = """
<style>
@import url('https://fonts.googleapis.com/css2?family=Google+Sans:wght@400;500&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@24,400,0,0');

header {visibility: hidden;}
footer {visibility: hidden;}
.stDeployButton {display:none;}
html, body, [class*="css"] { font-family: 'Google Sans', sans-serif !important; }

/* Bot Bubbles */
.bot-container { display: flex; justify-content: flex-start; width: 100%; margin: 15px 0 35px 0; padding-left: 80px; flex-direction: column; position: relative; box-sizing: border-box;}
.bot-text { color: #1f1f1f; font-size: 15px; line-height: 1.6; max-width: 85%; }

/* Bot Actions */
.bot-actions { display: flex; gap: 4px; margin-top: 12px; color: #444746; position: relative;}
.bot-actions .action-btn { font-size: 18px; cursor: pointer; padding: 8px; border-radius: 50%; transition: 0.2s; user-select: none; }
.bot-actions .action-btn:hover { background: #f0f4f9; color: #1f1f1f; }

/* User Bubbles */
.user-container { display: flex; flex-direction: column; align-items: flex-end; width: 100%; margin: 25px 0 10px 0; padding-right: 80px; box-sizing: border-box;}
.user-bubble { background-color: #f0f4f9; color: #1f1f1f; padding: 12px 24px; border-radius: 24px; max-width: 60%; font-size: 15px; line-height: 1.5; margin-bottom: 4px;}

/* User Actions */
.user-actions { display: flex; gap: 4px; color: #444746; margin-right: 8px; }
.user-actions .action-btn { font-size: 16px; cursor: pointer; padding: 6px; border-radius: 50%; transition: 0.2s; user-select: none; }
.user-actions .action-btn:hover { background: #f0f4f9; color: #1f1f1f; }

/* The Input Box Customization */
div[data-testid="stChatInput"] {
    border-radius: 32px !important; max-width: 1000px !important; margin: 0 auto !important;
    padding-left: 20px !important; padding-right: 60px !important; transition: all 0.3s ease;
    border: 2px solid transparent !important; background-clip: padding-box, border-box !important;
    background-origin: padding-box, border-box !important;
    background-image: linear-gradient(white, white), linear-gradient(90deg, #4285f4, #ea4335, #fbbc05, #34a853) !important;
    box-shadow: 0px 4px 12px rgba(0,0,0,0.05) !important;
}
div[data-testid="stChatInput"]:focus-within {
    background-image: linear-gradient(white, white), linear-gradient(90deg, #4285f4, #ea4335, #fbbc05, #34a853) !important;
    box-shadow: 0 1px 10px rgba(32,33,36,.28) !important;
}

div[data-testid="stChatInput"] > div, div[data-testid="stChatInput"] > div:focus-within,
div[data-testid="stChatInput"] div[data-baseweb="textarea"], div[data-testid="stChatInput"] div[data-baseweb="textarea"]:focus-within,
div[data-testid="stChatInput"] textarea, div[data-testid="stChatInput"] textarea:focus {
    border: none !important; outline: none !important; box-shadow: none !important; background-color: transparent !important;
}
div[data-testid="stChatInput"] textarea { color: #1f1f1f !important; font-size: 16px !important; padding: 0 !important; width: 100% !important;}

div[data-testid="stChatInputContainer"]::after {
    content: "CodeAlpha FAQ Assistant is AI and can make mistakes."; display: block; text-align: center; font-size: 12px; color: #5f6368; padding-top: 15px; font-family: 'Google Sans', sans-serif;
}

@keyframes pulseMic {
    0% { background-color: transparent; transform: translateY(-50%) scale(1); }
    50% { background-color: #fbbc05; transform: translateY(-50%) scale(1.1); box-shadow: 0 0 10px rgba(251, 188, 5, 0.5); }
    100% { background-color: transparent; transform: translateY(-50%) scale(1); }
}
.mic-active {
    animation: pulseMic 1.5s infinite ease-in-out !important;
}
</style>
"""
st.markdown(base_css, unsafe_allow_html=True)

if len(active_chat["messages"]) == 0:
    st.markdown("""
<style>
.stApp { background: radial-gradient(circle at 50% 45%, #c2dffe 0%, #eef5ff 25%, #ffffff 60%) !important; }
div[data-testid="stChatInputContainer"] { position: fixed !important; bottom: calc(50% - 30px) !important; background: transparent !important; z-index: 999; width: 100%;}
.landing-title { position: fixed; top: calc(50% - 110px); left: 50%; transform: translateX(-50%); text-align: center; font-size: 38px; color: #202124; font-weight: 400; z-index: 999; }
</style>
""", unsafe_allow_html=True)
else:
    st.markdown("""
<style>
.stApp { background-color: #ffffff !important; }
div[data-testid="stChatInputContainer"] { bottom: 0 !important; background: #ffffff !important; padding-bottom: 25px !important; }
</style>
""", unsafe_allow_html=True)

# ==========================================
# 5. DOM INJECTION ENGINE (CODEALPHA)
# ==========================================
js_code = """
<script>
const parentDoc = window.parent.document;
if (!parentDoc.getElementById('codealpha-injected-script')) {
    const script = parentDoc.createElement('script');
    script.id = 'codealpha-injected-script';
    script.innerHTML = `
        if (!document.getElementById('codealpha-global-css')) {
            const style = document.createElement('style');
            style.id = 'codealpha-global-css';
            style.innerHTML = \`
                .codealpha-toast { position: fixed; bottom: -100px; left: 24px; background: #1f1f1f; padding: 14px 24px; border-radius: 8px; box-shadow: 0 4px 14px rgba(0,0,0,0.2); z-index: 200000; font-family: 'Google Sans', sans-serif; font-size: 14px; color: white; display: flex; align-items: center; gap: 12px; transition: bottom 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); pointer-events: none;}
                .codealpha-toast.show { bottom: 40px; }
                .feedback-modal-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(255,255,255,0.85); z-index: 200000; align-items: center; justify-content: center; }
                .feedback-modal { background: white; border-radius: 16px; padding: 24px; width: 450px; box-shadow: 0 8px 32px rgba(0,0,0,0.15); font-family: 'Google Sans', sans-serif; }
                .feedback-option { padding: 12px 16px; margin-bottom: 8px; background: #f0f4f9; border-radius: 8px; cursor: pointer; color: #1f1f1f; font-size: 14px; transition: 0.2s;}
                .feedback-option:hover { background: #e8eaed; }
                .redo-dropdown { position: absolute; top: 100%; left: 0; background: white; border-radius: 12px; box-shadow: 0 4px 16px rgba(0,0,0,0.15); padding: 8px 0; z-index: 999999 !important; min-width: 200px; margin-top: 4px; font-family: 'Google Sans', sans-serif; }
                .redo-item { padding: 10px 16px; cursor: pointer; font-size: 14px; display: flex; align-items: center; gap: 12px; color: #1f1f1f; transition: 0.2s;}
                .redo-item:hover { background: #f0f4f9; }
            \`;
            document.head.appendChild(style);
            
            const overlay = document.createElement('div');
            overlay.id = 'codealpha-feedback-modal';
            overlay.className = 'feedback-modal-overlay';
            overlay.innerHTML = \`
                <div class="feedback-modal">
                    <div style="display:flex; justify-content:space-between; align-items:center; margin-bottom:16px;">
                        <h3 style="margin:0; font-size:20px; font-weight: 400;">What went wrong?</h3>
                        <span class="close-modal" style="cursor:pointer; font-size:20px; color:#5f6368;">✕</span>
                    </div>
                    <p style="margin-top:0; margin-bottom:20px; font-size:14px; color:#5f6368;">Your feedback helps make CodeAlpha better for everyone.</p>
                    <div class="feedback-option">Offensive / Unsafe</div>
                    <div class="feedback-option">Not factually correct</div>
                    <div class="feedback-option">Didn't follow instructions</div>
                    <div class="feedback-option">Personalization issue</div>
                    <div class="feedback-option">Other</div>
                </div>
            \`;
            document.body.appendChild(overlay);

            const toast = document.createElement('div');
            toast.id = 'codealpha-global-toast';
            toast.className = 'codealpha-toast';
            toast.innerHTML = '<span id="ca-toast-msg-text"></span>';
            document.body.appendChild(toast);
        }

        window.codeAlphaTriggerToast = function(msg) {
            const toast = document.getElementById('codealpha-global-toast');
            if(toast) {
                document.getElementById('ca-toast-msg-text').innerText = msg;
                toast.classList.add('show');
                setTimeout(() => { toast.classList.remove('show'); }, 3000);
            }
        }

        document.addEventListener('click', function(e) {
            // COPY PROMPT
            if (e.target.closest('.action-copy-prompt')) {
                const btnCopy = e.target.closest('.action-copy-prompt');
                const cleanText = btnCopy.closest('.user-container').querySelector('.user-bubble').innerText;
                navigator.clipboard.writeText(cleanText);
                window.codeAlphaTriggerToast("Prompt Copied successfully! Ready when you are.");
                return;
            }

            // EDIT PROMPT
            if (e.target.closest('.action-edit-prompt')) {
                const btnEdit = e.target.closest('.action-edit-prompt');
                const textToEdit = btnEdit.closest('.user-container').querySelector('.user-bubble').innerText;
                const textarea = document.querySelector('div[data-testid="stChatInput"] textarea');
                if (textarea) {
                    const descriptor = Object.getOwnPropertyDescriptor(window.HTMLTextAreaElement.prototype, "value").set;
                    descriptor.call(textarea, textToEdit);
                    textarea.dispatchEvent(new Event('input', { bubbles: true }));
                    textarea.focus();
                }
                return;
            }

            // FEEDBACK THUMBS
            if (e.target.closest('.action-thumb-up')) {
                window.codeAlphaTriggerToast("Thank you for your valuable feedback. It helps make CodeAlpha better for our growing community.");
                return;
            }
            if (e.target.closest('.action-thumb-down')) {
                document.getElementById('codealpha-feedback-modal').style.display = 'flex';
                return;
            }
            if (e.target.closest('.close-modal') || e.target.closest('.feedback-option')) {
                document.getElementById('codealpha-feedback-modal').style.display = 'none';
                if (e.target.closest('.feedback-option')) {
                    window.codeAlphaTriggerToast("Thank you for your valuable feedback. It helps make CodeAlpha better for our growing community..");
                }
                return;
            }

            // REFRESH OPTIONS
            if (e.target.closest('.action-refresh')) {
                const btnRefresh = e.target.closest('.action-refresh');
                document.querySelectorAll('.redo-dropdown').forEach(el => el.remove()); 
                document.querySelectorAll('.bot-actions').forEach(el => el.style.zIndex = '1'); 
                btnRefresh.closest('.bot-actions').style.zIndex = '9999';
                
                const menu = document.createElement('div');
                menu.className = 'redo-dropdown';
                menu.innerHTML = \`
                    <div class="redo-item" data-action="Longer"><span class="material-symbols-outlined" style="font-size:18px;">format_align_left</span> Longer</div>
                    <div class="redo-item" data-action="Shorter"><span class="material-symbols-outlined" style="font-size:18px;">short_text</span> Shorter</div>
                    <div class="redo-item" data-action="Personalize"><span class="material-symbols-outlined" style="font-size:18px;">person</span> Personalize</div>
                    <div class="redo-item" data-action="Try again"><span class="material-symbols-outlined" style="font-size:18px;">refresh</span> Try again</div>
                \`;
                btnRefresh.parentElement.appendChild(menu);
                return;
            }

            if (e.target.closest('.redo-item')) {
                e.preventDefault();
                const item = e.target.closest('.redo-item');
                const action = item.getAttribute('data-action');
                const container = item.closest('.bot-container');
                const textSpan = container.querySelector('.actual-bot-text');
                
                document.querySelectorAll('.redo-dropdown').forEach(el => el.remove());
                document.querySelectorAll('.bot-actions').forEach(el => el.style.zIndex = '1');
                
                if(!textSpan) return;

                let originalText = textSpan.getAttribute('data-original');
                if(!originalText) {
                    originalText = textSpan.innerText;
                    textSpan.setAttribute('data-original', originalText);
                }
                
                textSpan.innerText = "Please wait... I'm carefully generating a premium variation for you.";
                textSpan.style.opacity = "0.7";
                
                setTimeout(() => {
                    textSpan.style.opacity = "1";
                    if(action === 'Longer') {
                        textSpan.innerText = originalText + " Furthermore, our AI platform is designed to scale effortlessly, ensuring that all operations remain highly optimized and secure.";
                    } else if(action === 'Shorter') {
                        textSpan.innerText = originalText.split('.')[0] + ".";
                    } else if(action === 'Personalize') {
                        textSpan.innerText = originalText;
                    } else if(action === 'Try again') {
                        textSpan.innerText = "Let me rephrase that: " + originalText;
                    }
                }, 600);
                return;
            }

            // COPY TEXT
            if (e.target.closest('.action-copy')) {
                const cleanText = e.target.closest('.bot-container').querySelector('.actual-bot-text').innerText;
                navigator.clipboard.writeText(cleanText);
                window.codeAlphaTriggerToast("Copied successfully! Ready when you are.");
                return;
            }

            // TEXT TO SPEECH (INDIAN MALE VOICE)
            if (e.target.closest('.action-listen')) {
                const btnListen = e.target.closest('.action-listen');
                if (window.speechSynthesis.speaking) {
                    window.speechSynthesis.cancel();
                    btnListen.style.color = '#444746';
                    return;
                }
                
                const text = btnListen.closest('.bot-container').querySelector('.actual-bot-text').innerText;
                const utterance = new window.SpeechSynthesisUtterance(text);
                
                let voices = window.speechSynthesis.getVoices();
                let aiVoice = voices.find(v => (v.name.includes('India') || v.lang.includes('IN') || v.lang.includes('hi-IN')) && (v.name.toLowerCase().includes('male') || v.name.includes('Ravi') || v.name.includes('Rishi')));
                if(!aiVoice) aiVoice = voices.find(v => v.name.toLowerCase().includes('male'));
                if(!aiVoice && voices.length > 0) aiVoice = voices[0];
                
                if(aiVoice) utterance.voice = aiVoice;
                utterance.pitch = 1.0; 
                utterance.rate = 1.0;  
                
                btnListen.style.color = '#1a73e8';
                utterance.onend = () => { btnListen.style.color = '#444746'; };
                window.speechSynthesis.speak(utterance);
                return;
            }

            if (!e.target.closest('.action-refresh') && !e.target.closest('.redo-dropdown')) {
                document.querySelectorAll('.redo-dropdown').forEach(el => el.remove());
                document.querySelectorAll('.bot-actions').forEach(el => el.style.zIndex = '1');
            }
        });

        // --- SHARP REAL-TIME MICROPHONE ---
        window.codeAlphaMicRecording = false;
        window.codeAlphaRecognition = null;

        setInterval(() => {
            const container = document.querySelector('div[data-testid="stChatInput"]');
            const textarea = document.querySelector('div[data-testid="stChatInput"] textarea');
            
            if (container && textarea && !document.getElementById('ca-mic-btn')) {
                const btn = document.createElement('div');
                btn.id = 'ca-mic-btn';
                btn.innerHTML = \`<svg xmlns="http://www.w3.org/2000/svg" width="22" height="22" viewBox="0 0 24 24" fill="#444746"><path d="M12 14c1.66 0 3-1.34 3-3V5c0-1.66-1.34-3-3-3S9 3.34 9 5v6c0 1.66 1.34 3 3 3zm5-3c0 2.76-2.24 5-5 5s-5-2.24-5-5H5c0 3.53 2.61 6.43 6 6.92V21h2v-3.08c3.39-.49 6-3.39 6-6.92h-2z"/></svg>\`;
                btn.style.cssText = 'position: absolute; right: 34px; top: 50%; transform: translateY(-50%); cursor: pointer; z-index: 99999; display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 500%; transition: background-color 0.1s;';
                container.appendChild(btn);

                const RecognitionClass = window.SpeechRecognition || window.webkitSpeechRecognition;
                if (RecognitionClass && !window.codeAlphaRecognition) {
                    window.codeAlphaRecognition = new RecognitionClass();
                    window.codeAlphaRecognition.continuous = true; 
                    window.codeAlphaRecognition.interimResults = true; 
                    
                    window.codeAlphaRecognition.onstart = function() {
                        btn.classList.add('mic-active');
                        window.codeAlphaOriginalText = textarea.value;
                        window.codeAlphaFinalizedDictation = "";
                    };

                    window.codeAlphaRecognition.onresult = function(event) {
                        let interimTranscript = "";
                        for (let i = event.resultIndex; i < event.results.length; ++i) {
                            if (event.results[i].isFinal) {
                                window.codeAlphaFinalizedDictation += event.results[i][0].transcript;
                            } else {
                                interimTranscript += event.results[i][0].transcript;
                            }
                        }
                        let combinedTranscript = window.codeAlphaFinalizedDictation + interimTranscript;
                        let newText = window.codeAlphaOriginalText;
                        if (newText && combinedTranscript && !newText.endsWith(" ")) newText += " ";
                        newText += combinedTranscript;

                        const descriptor = Object.getOwnPropertyDescriptor(window.HTMLTextAreaElement.prototype, "value").set;
                        descriptor.call(textarea, newText);
                        textarea.dispatchEvent(new Event('input', { bubbles: true }));
                    };
                    
                    window.codeAlphaRecognition.onend = function() { 
                        btn.classList.remove('mic-active');
                        window.codeAlphaMicRecording = false; 
                    };
                }

                btn.onclick = function(e) { 
                    e.stopPropagation();
                    if (window.codeAlphaMicRecording) {
                        window.codeAlphaRecognition.stop(); 
                    } else {
                        try {
                            window.codeAlphaRecognition.start();
                            window.codeAlphaMicRecording = true;
                        } catch(err) {
                            window.codeAlphaRecognition.stop();
                        }
                    }
                };
            }
        }, 500);

        window.speechSynthesis.getVoices();
    `;
    parentDoc.head.appendChild(script);
}
</script>
"""
components.html(js_code, height=0, width=0)

# ==========================================
# 6. UI RENDERING & TYPING PIPELINE
# ==========================================
main_container = st.container()

def render_bot_message(text, animate=False):
    cursor = "▌" if animate else ""
    return f"""
    <div class="bot-container">
        <div class="bot-text">
            <span class="actual-bot-text">{text}</span>{cursor}
            <div class="bot-actions" style="{ 'display:none;' if animate else '' }">
                <span class="material-symbols-outlined action-btn action-thumb-up" title="Good response">thumb_up</span>
                <span class="material-symbols-outlined action-btn action-thumb-down" title="Bad response">thumb_down</span>
                <span style="position:relative;">
                    <span class="material-symbols-outlined action-btn action-refresh" title="Regenerate">refresh</span>
                </span>
                <span class="material-symbols-outlined action-btn action-copy" title="Copy text">content_copy</span>
                <span class="material-symbols-outlined action-btn action-listen" title="Listen">volume_up</span>
            </div>
        </div>
    </div>
    """

def render_user_message(text):
    return f"""
    <div class="user-container">
        <div class="user-bubble">{text}</div>
        <div class="user-actions">
            <span class="material-symbols-outlined action-btn action-copy-prompt" title="Copy prompt">content_copy</span>
            <span class="material-symbols-outlined action-btn action-edit-prompt" title="Edit prompt">edit</span>
        </div>
    </div>
    """

with main_container:
    if len(active_chat["messages"]) == 0:
        st.markdown("<div class='landing-title'>Hi there! Welcome to CodeAlpha. I'm your AI FAQ Assistant.</div>", unsafe_allow_html=True)
    else:
        for msg in active_chat["messages"]:
            if msg["role"] == "user":
                st.markdown(render_user_message(msg["content"]), unsafe_allow_html=True)
            else:
                st.markdown(render_bot_message(msg["content"], animate=False), unsafe_allow_html=True)

if st.session_state.pending_bot_response:
    with main_container:
        response = st.session_state.pending_bot_response
        message_placeholder = st.empty()
        full_response = ""
        for chunk in response.split():
            full_response += chunk + " "
            time.sleep(0.04)
            message_placeholder.markdown(render_bot_message(full_response, animate=True), unsafe_allow_html=True)
        
        message_placeholder.markdown(render_bot_message(full_response, animate=False), unsafe_allow_html=True)
        
    active_chat["messages"].append({"role": "assistant", "content": response})
    st.session_state.chat_sessions[st.session_state.current_chat_id] = active_chat
    st.session_state.pending_bot_response = None

# ==========================================
# 7. INPUT PROCESSING
# ==========================================
if prompt := st.chat_input("Please ask your question here..."):
    # Auto-rename new chats
    if active_chat["title"] == "New Chat":
        new_title = prompt[:20] + "..." if len(prompt) > 20 else prompt
        active_chat["title"] = new_title
        
    active_chat["messages"].append({"role": "user", "content": prompt})
    st.session_state.chat_sessions[st.session_state.current_chat_id] = active_chat
    
    bot_response = get_best_match(prompt)
    st.session_state.pending_bot_response = bot_response
    st.rerun()