import streamlit as st

# Temperature conversion logic
def convert_temperature(value, from_unit, to_unit):
    if from_unit == to_unit:
        return value

    # Convert from any to Celsius first
    if from_unit == "Fahrenheit":
        celsius = (value - 32) * 5 / 9
    elif from_unit == "Kelvin":
        celsius = value - 273.15
    elif from_unit == "Rankine":
        celsius = (value - 491.67) * 5 / 9
    else:  # from_unit == "Celsius"
        celsius = value

    # Convert from Celsius to target unit
    if to_unit == "Fahrenheit":
        return (celsius * 9 / 5) + 32
    elif to_unit == "Kelvin":
        return celsius + 273.15
    elif to_unit == "Rankine":
        return (celsius + 273.15) * 9 / 5
    else:  # to_unit == "Celsius"
        return celsius

# Emoji based on temperature in Celsius
def get_temperature_emoji(celsius):
    if celsius < 0:
        return "🥶❄️ Ice Cold"
    elif 0 <= celsius < 15:
        return "🧥🍃 Chilly"
    elif 15 <= celsius < 25:
        return "😊🌤 Pleasant"
    elif 25 <= celsius < 35:
        return "🥵☀️ Warm"
    else:
        return "🔥🥵 Scorching Hot"

# Streamlit UI
st.set_page_config(page_title="🌡️ Temperature Converter", page_icon="🌡️")

st.title("🌡️ Temperature Converter App")
st.markdown("Convert temperature between various units and get a fun emoji reaction based on the temperature!")

st.divider()

value = st.number_input("Enter Temperature Value", format="%.2f")

units = ["Celsius", "Fahrenheit", "Kelvin", "Rankine"]
from_unit = st.selectbox("Convert From", units)
to_unit = st.selectbox("Convert To", units)

if st.button("Convert"):
    result = convert_temperature(value, from_unit, to_unit)
    celsius_equiv = convert_temperature(value, from_unit, "Celsius")

    st.markdown(f"### ✅ **Converted Temperature: `{result:.2f}° {to_unit}`**")
    st.markdown(f"### {get_temperature_emoji(celsius_equiv)}")

st.divider()
st.caption("Made with ❤️ using Streamlit")