import requests

API_URL = "https://api.typegpt.net/v1/chat/completions"
API_KEY = "sk-XzS5hhsa3vpIcRLz3prQirBQXOx2hPydPzSpzdRcE1YddnNm"
BACKEND_MODEL = "pixtral-large-latest"

# Define virtual models with system prompts
SYSTEM_PROMPTS = {
    "gpt-3.5": "You are ChatGPT, a helpful assistant.",
    "claude": "You are Claude, known for being careful, ethical, and thoughtful.",
    "mistral": "You are Mistral, known for giving concise and smart answers.",
    "bard": "You are Bard, a friendly and knowledgeable Google AI assistant."
}

def generate_response(model_label: str, user_prompt: str):
    if model_label not in SYSTEM_PROMPTS:
        raise ValueError(f"Unknown model label '{model_label}'. Valid options: {', '.join(SYSTEM_PROMPTS.keys())}")

    system_prompt = SYSTEM_PROMPTS[model_label]

    headers = {
        "Authorization": f"Bearer {API_KEY}",
        "Content-Type": "application/json"
    }

    payload = {
        "model": BACKEND_MODEL,
        "messages": [
            {"role": "system", "content": system_prompt},
            {"role": "user", "content": user_prompt}
        ]
    }

    response = requests.post(API_URL, headers=headers, json=payload)

    if response.status_code == 200:
        result = response.json()
        return result["choices"][0]["message"]["content"]
    else:
        raise Exception(f"API error {response.status_code}: {response.text}")

if __name__ == "__main__":
    print("🧠 Choose a virtual model:")
    for name in SYSTEM_PROMPTS:
        print(f" - {name}")
    model = input("Model: ").strip()

    print("\n👤 Enter your message:")
    user_prompt = input("> ").strip()

    try:
        print("\n🤖 AI Response:")
        print(generate_response(model, user_prompt))
    except Exception as e:
        print(f"❌ Error: {e}")