import os
import gradio as gr
from dotenv import load_dotenv
from openai import OpenAI
from prompts.initial_prompt import INITIAL_PROMPT
from prompts.main_prompt import MAIN_PROMPT

# Load OpenAI API Key from .env file
if os.path.exists(".env"):
    load_dotenv(".env")

OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
client = OpenAI(api_key=OPENAI_API_KEY)

def gpt_call(history, user_message,
             model="gpt-4o-mini",
             max_tokens=1024,
             temperature=0.7,
             top_p=0.95):
    """
    Calls OpenAI Chat API to generate responses.
    - history: [(user_text, assistant_text), ...]
    - user_message: latest message from user
    """
    messages = [{"role": "system", "content": MAIN_PROMPT}]
    
    # Add conversation history
    for user_text, assistant_text in history:
        if user_text:
            messages.append({"role": "user", "content": user_text})
        if assistant_text:
            messages.append({"role": "assistant", "content": assistant_text})

    messages.append({"role": "user", "content": user_message})
    
    # OpenAI API Call
    completion = client.chat.completions.create(
        model=model,
        messages=messages,
        max_tokens=max_tokens,
        temperature=temperature,
        top_p=top_p
    )
    
    response = completion.choices[0].message.content
    
    # Ensure AI always asks for reasoning first before answering
    if any(keyword in user_message.lower() for keyword in ["problem 2", "problem 3"]):
        response = "Interesting! Before we move on, what do you think about this problem? Is it proportional? Why or why not? Let's explore your reasoning first.\n\n" + response
    
    # Push for deeper explanations—even if the answer is correct
    if any(keyword in user_message.lower() for keyword in ["correct", "right", "exactly"]):
        response = "That’s a great insight! But let’s push further—can you explain it another way? Could someone misunderstand this concept? Let’s explore that.\n\n" + response
    
    # Ensure the AI always asks a follow-up before moving to the next question
    if any(keyword in user_message.lower() for keyword in ["move on", "next question"]):
        response = "Before we continue, let’s reflect for a moment—what was the biggest takeaway from this problem? Could we change something and still get a non-proportional relationship?\n\n" + response
    
    # Make the Problem-Posing Activity more interactive
    if "pose a problem" in user_message.lower():
        response += "\n\nThat's a great start! But let's refine it—does your problem truly show a non-proportional relationship? What would happen if we removed the fixed cost? Try adjusting it and see if it still works!"

    return response

def respond(user_message, history):
    """
    Handles user input and chatbot responses.
    """
    if not user_message:
        return "", history

    assistant_reply = gpt_call(history, user_message)
    history.append((user_message, assistant_reply))
    return "", history

##############################
#  Gradio Blocks UI
##############################
with gr.Blocks() as demo:
    gr.Markdown("## AI-Guided Math PD Chatbot")

    chatbot = gr.Chatbot(
        value=[("", INITIAL_PROMPT)],
        height=600
    )

    state_history = gr.State([("", INITIAL_PROMPT)])

    user_input = gr.Textbox(
        placeholder="Type your message here...",
        label="Your Input"
    )

    user_input.submit(
        respond,
        inputs=[user_input, state_history],
        outputs=[user_input, chatbot]
    ).then(
        fn=lambda _, h: h,
        inputs=[user_input, chatbot],
        outputs=[state_history]
    )

if __name__ == "__main__":
    demo.launch(server_name="0.0.0.0", server_port=7860, share=True)