app.py

import streamlit as st
import requests
import os
os.system("pip install langchain-groq==0.1.3")
from langchain_groq import ChatGroq
from langchain_core.messages import HumanMessage, SystemMessage
from langchain_core.prompts import ChatPromptTemplate
os.system("pip install python-dotenv")
from dotenv import load_dotenv

load_dotenv()  
GROQ_API_KEY = os.getenv("GROQ_API_KEY") 

# Validate API Key
if not GROQ_API_KEY:
    raise ValueError("GROQ_API_KEY environment variable is not set")

# Function to fetch Wikipedia summary
def search_travel_info(destination):
    url = f"https://en.wikipedia.org/api/rest_v1/page/summary/{destination}"
    response = requests.get(url)
    if response.status_code == 200:
        data = response.json()
        return data.get("extract", "No information found.")
    return "No results found."

# Function to generate travel itinerary using Groq API
def generate_itinerary(start_location, budget, duration, destination, purpose, preferences):
    search_results = search_travel_info(destination)
    
    # Create prompt template
    prompt_template = ChatPromptTemplate.from_messages([
        SystemMessage(content="You are an expert travel guide. Provide a detailed travel itinerary."),
        HumanMessage(content=f"""
            Create a {duration}-day travel itinerary for a traveler going from {start_location} to {destination}.
            
            ### 🏷️ Traveler Information:
            - Budget: {budget}
            - Purpose of Travel: {purpose}
            - Preferences: {preferences}
            
            ### 🚆 Day-wise Itinerary:
            - 📍 Activities (morning, afternoon, evening)
            - 🎭 Attractions (landmarks & hidden gems)
            - 🍽️ Food recommendations
            - 🏨 Accommodation options
            - 🚗 Transportation details
            
            ### 📌 Additional Travel Info:
            {search_results}
        """)
    ])
    
    # Initialize Groq Chat Model (Llama3-8B)
    llm = ChatGroq(temperature=0,model_name="llama-3.3-70b-versatile", api_key=GROQ_API_KEY)
    
    # Generate response
    response = llm.invoke(prompt_template.format())
    
    return response.content if response else "Error: Unable to generate itinerary."

# Set page config (add this at the very top)
st.set_page_config(page_title="AI Travel Planner", page_icon="✈️")

# Apply global background image
st.markdown(
    """
    <style>
    .stApp {
        # background-image: url("https://images.unsplash.com/photo-1436491865332-7a61a109cc05");
        # background-image: url("https://images.unsplash.com/photo-1506748686214-e9df14d4d9d0");
        background-image: url("https://images.unsplash.com/photo-1483728642387-6c3bdd6c93e5");
        # background-image: url("https://images.unsplash.com/photo-1518563259479-d003c05a6507?q=80&w=1470&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D");
        background-size: cover;
        background-position: center;
        background-attachment: fixed;
        filter: brightness(90%);
    }
    .stApp::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.4);  /* 40% opaque black */
        z-index: -1;
    }
    .form-title {
        color: white !important;
        font-size: 2rem;
        font-weight: bold;
        text-align: center;
    }
    .form-subtitle {
        color: white !important;
        font-size: 1.2rem;
        text-align: center;
        margin-bottom: 1.5rem;
    }
    /* Frosted Glass Box */
    .frosted-glass-box {
        background: rgba(255, 255, 255, 0.2);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-radius: 15px;
        padding: 2rem;
        box-shadow: 0px 8px 16px rgba(0, 0, 0, 0.2);
        width: 80%;
        margin: auto;
    }
    /* Input Styling */
    .stTextInput input, 
    .stSelectbox select, 
    .stNumberInput input, 
    .stTextArea textarea {
        color: #000000 !important;
        background-color: rgba(255, 255, 255, 0.7) !important;
        border-radius: 8px !important;
        border: 1px solid rgba(0, 0, 0, 0.1) !important;
        padding: 10px;
        font-size: 1rem;
    }
    /* Button Styling */
    .stButton button {
        background-color: black !important;
        color: white !important;
        border-radius: 8px !important;
        padding: 10px 20px !important;
        font-size: 1rem;
        font-weight: bold !important;
        width: 100% !important;
        margin-top: 1rem !important;
        border: none !important;
    }
    .stButton button:hover {
        background-color: white !important;
        color: black !important;
        border: 1.5px solid black !important;
    }
    /* Itinerary Box */
    .itinerary-box {
        background: rgba(255, 255, 255, 0.7);
        border-radius: 15px;
        padding: 1.5rem;
        margin-top: 1.5rem;
        width: 80%;
        margin: auto;
    }
    </style>
    """,
    unsafe_allow_html=True
)

# Title and Subtitle
st.markdown('<h1 class="form-title">AI-Powered Travel Planner ✈️</h1>', unsafe_allow_html=True)
st.markdown('<p class="form-subtitle">Plan your next trip with AI!</p>', unsafe_allow_html=True)

# Form Elements (Columns for Structure)
col1, col2 = st.columns(2)
with col1:
    start_location = st.text_input("📍 Starting Location")
with col2:
    destination = st.text_input("🌍 Destination")

col3, col4 = st.columns(2)
with col3:
    budget = st.selectbox("💰 Select Budget", ["Low", "Moderate", "Luxury"])
with col4:
    duration = st.number_input("📅 Trip Duration (days)", min_value=1, max_value=30, value=3)

# Full-width Form Elements
purpose = st.text_area("📝 Purpose of Trip")
preferences = st.text_area("🎯 Your Preferences (e.g., adventure, food, history)")

if st.button("Generate Itinerary"):
    if start_location and destination and purpose and preferences:
        itinerary = generate_itinerary(start_location, budget, duration, destination, purpose, preferences)
        st.subheader("Your AI-Generated Itinerary:")
        st.write(itinerary)
    else:
        
        st.warning("Please fill in all fields.")