src/streamlit_app.py

import streamlit as st

# ---------------------------------------------------
# PAGE CONFIG
# ---------------------------------------------------
st.set_page_config(page_title="FitPlan AI", layout="centered")

st.title(" FitPlan AI – User Fitness Profile")

# ---------------------------------------------------
# PERSONAL INFORMATION
# ---------------------------------------------------
st.subheader("👤 Personal Information")

name = st.text_input("Enter Your Name")

gender = st.selectbox(
    "Gender",
    ["Male", "Female", "Other"]
)

col1, col2 = st.columns(2)

with col1:
    height = st.number_input("Height (in cm)", min_value=100, max_value=250)

with col2:
    weight = st.number_input("Weight (in kg)", min_value=30, max_value=200)

# ---------------------------------------------------
# BMI CALCULATION (Basic Logic Only)
# ---------------------------------------------------
bmi = None

if height > 0 and weight > 0:
    height_m = height / 100
    bmi = weight / (height_m ** 2)
    st.write(f"### 📊 Your BMI: {bmi:.2f}")

# ---------------------------------------------------
# FITNESS GOAL
# ---------------------------------------------------
st.subheader("🎯 Fitness Goal")

goal = st.selectbox(
    "",
    [
        "Flexible",
        "Weight Loss",
        "Build Muscle",
        "Strength Gaining",
        "Abs Building"
    ]
)

# ---------------------------------------------------
# EQUIPMENT
# ---------------------------------------------------
st.subheader("Available Equipment")

col1, col2 = st.columns(2)

with col1:
    dumbbells = st.checkbox("Dumbbells")
    resistance_band = st.checkbox("Resistance Band")
    yoga_mat = st.checkbox("Yoga Mat")
    no_equipment = st.checkbox("No Equipment")

with col2:
    treadmill = st.checkbox("Treadmill")
    cycle = st.checkbox("Cycle")
    pullups_bar = st.checkbox("Pullups Bar")
    weight_plates = st.checkbox("Weight Plates")

equipment = []

equipment_map = {
    "Dumbbells": dumbbells,
    "Resistance Band": resistance_band,
    "Yoga Mat": yoga_mat,
    "No Equipment": no_equipment,
    "Treadmill": treadmill,
    "Cycle": cycle,
    "Pullups Bar": pullups_bar,
    "Weight Plates": weight_plates,
}

for item, selected in equipment_map.items():
    if selected:
        equipment.append(item)

# ---------------------------------------------------
# FITNESS LEVEL
# ---------------------------------------------------
st.subheader("📈 Fitness Level")

fitness_level = st.radio(
    "",
    ["Beginner", "Intermediate", "Advanced"],
    horizontal=True
)

# ---------------------------------------------------
# SUBMIT BUTTON (Backend Receiving Data)
# ---------------------------------------------------
if st.button("Submit Profile"):

    if not name:
        st.error("Please enter your name.")
    elif not equipment:
        st.error("Please select at least one equipment option.")
    else:
        st.success("✅ Profile Submitted Successfully!")

        st.json({
            "Name": name,
            "Gender": gender,
            "BMI": round(bmi, 2) if bmi else None,
            "Goal": goal,
            "Fitness Level": fitness_level,
            "Equipment": equipment
        })