import openai
import os
from dotenv import load_dotenv
import random

load_dotenv()

OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")

if not OPENAI_API_KEY:
    raise ValueError("OpenAI API key not found. Please check your .env file.")

openai.api_key = OPENAI_API_KEY

greetings = [
    "Hello! How are you today? What's new?",
    "Hi there! How may I assist you today?",
    "Hello! What's on your mind?",
    "Hey! What can I do for you today?",
    "Hi! How can I help you today?",
    "Greetings! How's it going?",
    "Hey there! What can I assist you with?",
    "Hello! What are you thinking about today?",
    "Hi! How's your day going so far?",
    "Hey! What's up? How can I assist you?",
    "Hello! What brings you here today?",
    "Hi! Need help with something today?",
    "Good day! How can I be of service?",
    "Hello! What would you like to discuss today?",
    "Hey! Ready to chat? What’s on your mind?"
]

def start_chat_message() -> str:
    try:
        greeting = random.choice(greetings)
        return greeting
    except Exception as e:
        print(f"Error in start_chat_message: {e}")
        raise ValueError("Failed to generate greeting.")

def respond_to_user(user_input: str) -> str:
    try:
        client = openai.OpenAI()
        response = client.chat.completions.create(
            model="gpt-4o-mini",
            messages=[
                {"role": "system", "content": "You are a helpful assistant. Please keep your answers short, complete, and under 512 tokens. Avoid long elaborations unless absolutely necessary."},
                {"role": "user", "content": user_input}
            ],
            max_tokens=512,
            temperature=0.5
        )
        return response.choices[0].message.content.strip()
    except Exception as e:
        print(f"OpenAI API Error: {e}")
        return "Sorry, I couldn't get a response from the AI. Please try again later."