import requests
import os

# Retrieve Hugging Face API token from environment variable
API_TOKEN = os.getenv("HF_API_TOKEN")

if not API_TOKEN:
    raise ValueError("⚠️ Error: Hugging Face API token is missing! Set the HF_API_TOKEN environment variable.")

# Define model and API endpoint
MODEL_ID = "bigcode/starcoder"
API_URL = f"https://api-inference.huggingface.co/models/{MODEL_ID}"
HEADERS = {"Authorization": f"Bearer {API_TOKEN}"}

def translate_code(code_snippet, source_lang, target_lang):
    """
    Translate code using Hugging Face API.
    """
    prompt = f"Translate the following {source_lang} code to {target_lang}:\n\n{code_snippet}\n\nTranslated {target_lang} Code:\n"

    try:
        response = requests.post(API_URL, headers=HEADERS, json={"inputs": prompt})

        if response.status_code == 200:
            response_json = response.json()
            if isinstance(response_json, list) and len(response_json) > 0:
                generated_text = response_json[0].get("generated_text", "")
                translated_code = generated_text.split(f"Translated {target_lang} Code:\n")[-1].strip()
                return translated_code
            else:
                return "⚠️ Error: Unexpected response format from API."

        elif response.status_code == 400:
            return "⚠️ Error: Invalid request. Check input format."

        elif response.status_code == 401:
            return "⚠️ Error: Unauthorized. Check your API token."

        elif response.status_code == 403:
            return "⚠️ Error: Access forbidden. You may need special access to this model."

        elif response.status_code == 503:
            return "⚠️ Error: Model is loading. Please wait a moment and try again."

        else:
            return f"⚠️ Error {response.status_code}: {response.text}"

    except requests.exceptions.RequestException as e:
        return f"⚠️ Network Error: {str(e)}"

# Example usage
if __name__ == "__main__":
    source_code = """
def add(a, b):
    return a + b
"""
    translated_code = translate_code(source_code, "Python", "Java")
    print("Translated Java Code:\n", translated_code)