import streamlit as st
import requests

st.set_page_config(page_title="Currency Converter", page_icon="💱")

st.title("💱 Live Currency Converter")

st.write("Convert currencies in real-time using live exchange rates 🌍")

# Currency list (10+)
currencies = [
    "USD", "EUR", "GBP", "INR", "PKR",
    "SAR", "AED", "CAD", "AUD", "JPY", "CNY"
]

# UI
from_currency = st.selectbox("From Currency", currencies)
to_currency = st.selectbox("To Currency", currencies)

amount = st.number_input("Enter Amount", min_value=0.0, value=1.0)

# Convert button
if st.button("Convert 💱"):

    try:
        # API (stable)
        url = "https://open.er-api.com/v6/latest/USD"
        response = requests.get(url)
        data = response.json()

        if data["result"] == "success":

            rates = data["rates"]

            if from_currency in rates and to_currency in rates:

                usd_value = amount / rates[from_currency]
                result = usd_value * rates[to_currency]

                st.success(f"{amount} {from_currency} = {result:.2f} {to_currency}")

            else:
                st.error("Invalid currency selected!")

        else:
            st.error("API Error occurred")

    except:
        st.error("Something went wrong. Please try again.")