app.py

import gradio as gr
from huggingface_hub import InferenceClient

# ✅ Hardcoded Token & Model
HF_TOKEN = "hf_your_token_here"   # apna HF token paste karein
MODEL_NAME = "openai/gpt-oss-20b"

# 🔒 Hardcoded Practical Lists
hardcoded_answers = {
    "chemistry class 9 practicals": """🔬 Chemistry Class IX (Practical Index)

- To separate the given mixture by physical method
- To determine the melting point of naphthalene
- To determine the boiling point of acetone
- To separate naphthalene from mixture of naphthalene and sand (sublimation)
- To separate alcohol and water by distillation
- To demonstrate that chemical reaction releases energy in the form of heat
- To prepare 100 mL of 0.1M sodium hydroxide solution
- To prepare 250 mL of 0.1M hydrochloric acid solution
- To prepare 100 mL of 0.1M sodium carbonate solution
- To prepare 100 mL of 0.1M NaOH by dilution of given solution
- To prepare pure copper sulphate crystals from impure sample
- To demonstrate miscible and immiscible liquids
- To demonstrate effect of temperature on solubility
- To demonstrate electrical conductivity of different solutions
- To demonstrate formation of a binary compound""",

    "chemistry class 10 practicals": """🔬 Chemistry Class X (Practical Index)

- Identify sodium, calcium, strontium, barium, copper and potassium ions by flame test
- Standardize the given HCl solution volumetrically
- Determine exact molarity of Na₂CO₃ solution volumetrically
- Demonstrate that some natural substances are weak acids
- Classify substances as acidic, basic, or neutral
- Demonstrate decomposition of sugar into elements/compounds""",

    "physics class 9 practicals": """⚙ Physics Class IX (Practical Index)

- To measure area of cross-section of a cylinder using vernier callipers
- To measure volume of a solid cylinder using vernier callipers
- To study motion of a ball rolling down an inclined plane (s vs t² graph)
- To determine acceleration due to gravity (g) by free fall method
- To find limiting friction by roller method
- To find resultant of two forces acting at a point by graphical method
- To verify principle of moments using a beam balance
- To study variation of time period of a pendulum with length and calculate g
- To determine density of a solid heavier than water using Archimedes principle
- To study temperature vs time graph (ice → water → steam)""",

    "physics class 10 practicals": """⚙ Physics Class X (Practical Index)

- To verify the law of reflection of light
- To find refractive index of water using a concave mirror
- To determine critical angle of glass using semicircular slab/prism
- To trace path of a ray of light through a glass prism and measure deviation
- To find focal length of convex lens (parallel ray/parallax method)
- To set up an astronomical telescope
- To set up a microscope
- To verify Ohm’s law using wire as a conductor
- To study resistors in series circuit
- To study resistors in parallel circuit
- To determine resistance of a galvanometer by half-deflection method
- To trace magnetic field using a bar magnet"""
}


def respond(message, history: list[dict[str, str]]):
    # ✅ Pehle check karein hardcoded answers
    lower_msg = message.lower()
    for key, answer in hardcoded_answers.items():
        if key in lower_msg:
            yield answer
            return  # yahan se return ho jayega, model call nahi hoga

    # ✅ Agar hardcoded nahi mila toh model se response lo
    client = InferenceClient(token=HF_TOKEN, model=MODEL_NAME)

    messages = [{"role": "system", "content": "You are a friendly chatbot."}]
    messages.extend(history)
    messages.append({"role": "user", "content": message})

    response = ""
    for msg in client.chat_completion(
        messages,
        max_tokens=512,
        stream=True,
        temperature=0.7,
        top_p=0.95
    ):
        if msg.choices and msg.choices[0].delta.content:
            response += msg.choices[0].delta.content
        yield response


# 💜 CSS aur UI wahi rakha jo aapke code me hai
custom_css = """ ... (same CSS as before) ... """

with gr.Blocks(css=custom_css) as demo:
    with gr.Column():
        gr.HTML("<div class='top-bar'>💬 Virtual Chatbot</div>")
        chatbot = gr.Chatbot(elem_classes="chatbot", bubble_full_width=False, show_copy_button=False)
        with gr.Row(elem_classes="input-area"):
            msg = gr.Textbox(placeholder="Type your message...", lines=1)
            send_btn = gr.Button("➤")

    def user_submit(user_message, chat_history):
        return "", chat_history + [(user_message, None)]

    def bot_response(chat_history):
        user_message = chat_history[-1][0]
        response = ""
        for partial in respond(user_message, [{"role": "user", "content": h[0]} for h in chat_history[:-1]]):
            response = partial
        chat_history[-1] = (chat_history[-1][0], response)
        return chat_history

    msg.submit(user_submit, [msg, chatbot], [msg, chatbot]).then(
        bot_response, chatbot, chatbot
    )
    send_btn.click(user_submit, [msg, chatbot], [msg, chatbot]).then(
        bot_response, chatbot, chatbot
    )

if __name__ == "__main__":
    demo.launch(share=True)