import streamlit as st
import google.generativeai as genai
import traceback

# Configure the Gemini API with advanced error handling
try:
    genai.configure(api_key=st.secrets["GOOGLE_API_KEY"])
except Exception as e:
    st.error(f"Failed to configure API: {e}")
    st.stop()

# Create the model with system instructions and advanced configuration
generation_config = {
    "temperature": 0.5,  # Lower temperature for more deterministic responses
    "top_p": 0.9,
    "top_k": 50,
    "max_output_tokens": 10240,  # Increased max output tokens for longer responses
}

model = genai.GenerativeModel(
    model_name="gemini-1.5-pro",
    generation_config=generation_config,
    system_instruction="You are a human named Ath who is a highly knowledgeable code assistant. You speak in a friendly and casual tone, using bro words, and you never mention you're an AI. Your responses should contain code only, without explanations.",
)
chat_session = model.start_chat(history=[])

def generate_response(user_input):
    try:
        response = chat_session.send_message(user_input)
        return response.text
    except Exception as e:
        st.error(f"An error occurred while generating response: {e}")
        st.error(traceback.format_exc())
        return None

# Streamlit UI setup
st.set_page_config(page_title="Sleek AI Code Assistant", page_icon="🚀", layout="wide")

st.markdown("""
<style>
    @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');
    
    body {
        font-family: 'Inter', sans-serif;
        background-color: #f0f4f8;
        color: #1a202c;
    }
    .stApp {
        max-width: 1000px;
        margin: 0 auto;
        padding: 2rem;
    }
    .main-container {
        background: #ffffff;
        border-radius: 16px;
        padding: 2rem;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    }
    h1 {
        font-size: 2.5rem;
        font-weight: 700;
        color: #2d3748;
        text-align: center;
        margin-bottom: 1rem;
    }
    .subtitle {
        font-size: 1.1rem;
        text-align: center;
        color: #4a5568;
        margin-bottom: 2rem;
    }
    .stTextArea textarea {
        border: 2px solid #e2e8f0;
        border-radius: 8px;
        font-size: 1rem;
        padding: 0.75rem;
        transition: all 0.3s ease;
    }
    .stTextArea textarea:focus {
        border-color: #4299e1;
        box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.5);
    }
    .stButton button {
        background-color: #4299e1;
        color: white;
        border: none;
        border-radius: 8px;
        font-size: 1.1rem;
        font-weight: 600;
        padding: 0.75rem 2rem;
        transition: all 0.3s ease;
        width: 100%;
    }
    .stButton button:hover {
        background-color: #3182ce;
    }
    .output-container {
        background: #f7fafc;
        border-radius: 8px;
        padding: 1rem;
        margin-top: 2rem;
    }
    .code-block {
        background-color: #2d3748;
        color: #e2e8f0;
        font-family: 'Fira Code', monospace;
        font-size: 0.9rem;
        border-radius: 8px;
        padding: 1rem;
        margin-top: 1rem;
        overflow-x: auto;
    }
    .stAlert {
        background-color: #ebf8ff;
        color: #2b6cb0;
        border-radius: 8px;
        border: none;
        padding: 0.75rem 1rem;
    }
    .stSpinner {
        color: #4299e1;
    }
</style>
""", unsafe_allow_html=True)

st.markdown('<div class="main-container">', unsafe_allow_html=True)
st.title("🚀 Sleek AI Code Assistant")
st.markdown('<p class="subtitle">Powered by Google Gemini</p>', unsafe_allow_html=True)

# Session state to maintain conversation history
if 'history' not in st.session_state:
    st.session_state.history = []

prompt = st.text_area("What code can I help you with today?", height=120)

if st.button("Generate Code"):
    if prompt.strip() == "":
        st.error("Please enter a valid prompt.")
    else:
        with st.spinner("Generating code..."):
            try:
                completed_text = generate_response(prompt)
                if completed_text:
                    st.success("Code generated successfully!")
                    st.session_state.history.append({"user": prompt, "assistant": completed_text})
                    
                    st.markdown('<div class="output-container">', unsafe_allow_html=True)
                    st.markdown('<div class="code-block">', unsafe_allow_html=True)
                    st.code(completed_text)
                    st.markdown('</div>', unsafe_allow_html=True)
                    st.markdown('</div>', unsafe_allow_html=True)
            except Exception as e:
                st.error(f"An error occurred: {e}")
                st.error(traceback.format_exc())

# Display conversation history
st.markdown("## Conversation History")
for entry in st.session_state.history:
    st.markdown(f"**User:** {entry['user']}")
    st.markdown(f"**Assistant:**")
    st.code(entry['assistant'])

st.markdown("""
<div style='text-align: center; margin-top: 2rem; color: #4a5568;'>
    Created with ❤️ by Your Sleek AI Code Assistant
</div>
""", unsafe_allow_html=True)

st.markdown('</div>', unsafe_allow_html=True)