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import gradio as gr
import openai
import json
import os
from typing import List, Tuple, Optional
from datetime import datetime

class ChatbotManager:
    def __init__(self):
        self.conversation_history = []
        self.current_api_key = None
        self.current_model = "gpt-3.5-turbo"
        self.system_prompt = "You are a helpful AI assistant. Respond in a friendly and informative manner." #default
        self.max_tokens = 150
        self.temperature = 0.7

    def set_api_key(self, api_key: str) -> str:
        if not api_key.strip():
            return "❌ Please enter a valid API key"

        self.current_api_key = api_key.strip()
        openai.api_key = self.current_api_key

        try:
            openai.Model.list()
            return "βœ… API key validated successfully!"
        except Exception as e:
            return f"❌ Invalid API key: {str(e)}"

    def update_settings(self, model: str, system_prompt: str, max_tokens: int, temperature: float) -> str:
        self.current_model = model
        self.system_prompt = system_prompt
        self.max_tokens = max_tokens
        self.temperature = temperature
        return f"βœ… Settings updated: Model={model}, Max Tokens={max_tokens}, Temperature={temperature}"

    def preprocess_data(self, data_text: str) -> str: ### we are integrating the custom data to the existing KB of model
        if not data_text.strip():
            return "No custom data provided"

        base_prompt = "You are a helpful AI assistant. Respond in a friendly and informative manner."
        self.system_prompt = base_prompt + f"\n\nAdditional Context:\n{data_text}"
        return f"βœ… Custom data integrated ({len(data_text)} characters)"

    def generate_response(self,user_input:str, history: List[Tuple[str, str]])-> Tuple[str, List[Tuple[str, str]]]:
        if not self.current_api_key:
            return "❌ Please set your API key first!", history

        if not user_input.strip():
            return "Please enter a message.", history

        try:
            messages=[{"role": "system", "content": self.system_prompt}]

            for user_msg, assistant_msg in history:
                messages.append({"role": "user", "content": user_msg})
                messages.append({"role": "assistant", "content": assistant_msg})

            messages.append({"role": "user", "content": user_input})

            response=openai.ChatCompletion.create(
                model=self.current_model,
                messages=messages,
                max_tokens=self.max_tokens,
                temperature=self.temperature,
                n=1,
                stop=None,
            )

            assistant_response = response.choices[0].message.content.strip()
            history.append((user_input, assistant_response))

            return assistant_response, history

        except Exception as e:
            error_msg = f"❌ Error generating response: {str(e)}"
            return error_msg, history

    def clear_conversation(self) -> Tuple[str, List[Tuple[str, str]]]:
        self.conversation_history = []
        return "", []

chatbot=ChatbotManager()

AVAILABLE_MODELS = [ #dropdown for models openai==0.28
    "gpt-3.5-turbo",
    "gpt-3.5-turbo-16k",
    "gpt-4",
    "gpt-4-32k",
    "gpt-4-0613",
    "gpt-4-32k-0613"
]

def create_interface():
    with gr.Blocks(title="LLM-Based Chatbot", theme=gr.themes.Ocean()) as demo:
        gr.Markdown("""
        # πŸ€– LLM-Based Conversational AI Chatbot
        This chatbot leverages powerful Language Models to provide intelligent conversations.
        Enter your OpenAI API key to get started!
        """)
        with gr.Tab("Chat Interface"):
            with gr.Row():
                with gr.Column(scale=3):
                    chatbot_interface = gr.Chatbot(
                        label="Conversation",
                        height=400,
                        show_label=True,
                        avatar_images=("user.png", "assistant.png"),
                        show_copy_button=True,
                        bubble_full_width=False,
                    )
                    with gr.Row():
                        user_input = gr.Textbox(
                            placeholder="Type your message here...",
                            scale=4,
                            show_label=False,
                            container=False
                        )
                        send_btn = gr.Button("πŸ“€ Send", variant="primary", scale=1)

                    with gr.Row():
                        clear_btn = gr.Button("πŸ—‘οΈ Clear Chat")
                        regenerate_btn = gr.Button("πŸ”„ Regenerate")

                with gr.Column(scale=1):
                    gr.Markdown("### πŸ”§ Quick Settings")
                    
                    api_key_input = gr.Textbox(
                        label="πŸ”‘ OpenAI API Key",
                        placeholder="sk-...",
                        type="password"
                    )
                    api_status = gr.Textbox(
                        label="API Status",
                        interactive=False,
                        value="❌ No API key provided"
                    )
                    
                    model_dropdown = gr.Dropdown(
                        choices=AVAILABLE_MODELS,
                        value="gpt-3.5-turbo",
                        label="πŸ€– Model"
                    )
                    
                    max_tokens_slider = gr.Slider(
                        minimum=50,
                        maximum=4096,
                        value=150,
                        step=10,
                        label="πŸ“ Max Tokens"
                    )
                    
                    temperature_slider = gr.Slider(
                        minimum=0.0,
                        maximum=1.0,
                        value=0.7,
                        step=0.1,
                        label="🌑️ Temperature"
                    )
                    
                    gr.Markdown("### πŸ“Š Current Settings")
                    current_settings = gr.Textbox(
                        value="Model: gpt-3.5-turbo\nTokens: 150\nTemp: 0.7",
                        label="Active Configuration",
                        interactive=False,
                        lines=3
                    )
        with gr.Tab("βš™οΈ Advanced Settings"):
            gr.Markdown("### 🎯 System Prompt Configuration")
            system_prompt_input = gr.Textbox(
                label="System Prompt",
                value="You are a helpful AI assistant. Respond in a friendly and informative manner.",
                lines=5,
                placeholder="Enter custom system prompt..."
            )
            
            gr.Markdown("### πŸ“š Custom Data Integration")
            custom_data_input = gr.Textbox(
                label="Custom Training Data",
                lines=10,
                placeholder="Enter custom data, FAQs, or domain-specific information..."
            )
            
            with gr.Row():
                update_settings_btn = gr.Button("βœ… Update Settings")
                integrate_data_btn = gr.Button("πŸ“Š Integrate Custom Data")
                reset_prompt_btn = gr.Button("πŸ”„ Reset to Default")
            
            settings_status = gr.Textbox(
                label="Settings Status",
                interactive=False
            )
            
            gr.Markdown("### 🎭 Preset System Prompts")
            with gr.Row():
                preset_customer_support = gr.Button("πŸ‘₯ Customer Support")
                preset_tutor = gr.Button("πŸŽ“ Educational Tutor")
                preset_creative = gr.Button("✨ Creative Assistant")
                preset_technical = gr.Button("πŸ”§ Technical Writer")