import streamlit as st 

import streamlit as st

st.header("🚗 Brake System Fault Detection")



feature_desc = {
    'Brake_Pressure': "Pressure applied to the brake pedal.",
    'Pad_Wear_Level': "Indicates the wear level of brake pads.",
    'ABS_Status': "1 if Anti-lock Braking System is active, else 0.",
    'Wheel_Speed_FL': "Speed of the front-left wheel.",
    'Wheel_Speed_FR': "Speed of the front-right wheel.",
    'Wheel_Speed_RL': "Speed of the rear-left wheel.",
    'Wheel_Speed_RR': "Speed of the rear-right wheel.",
    'Fluid_Temperature': "Temperature of the brake fluid.",
    'Pedal_Position': "How far the brake pedal is pressed."
}

selected = st.selectbox("Select a feature to understand:", list(feature_desc.keys()))
st.info(f"📘 **{selected}**: {feature_desc[selected]}")




# 🎯 Goal
st.markdown("### 🎯 Goal")
st.markdown("""
Build a data-driven model that detects braking system faults using sensor data such as brake pressure, wheel speeds, fluid temperature, and pedal position.
""")

# 💼 Business Objective
st.markdown("### 📌 Business Objective")
st.markdown("""
- Detect faults early to reduce vehicle failure risks.
- Analyze sensor behavior during fault vs non-fault conditions.
- Support preventive maintenance using historical data patterns.
""")
st.markdown("### 📊 Data Understanding")

st.markdown("""
The dataset contains **real-time sensor readings** collected from a vehicle's braking system to detect faults. Below are the details of each feature:

#### 🔢 Numerical Features:

- **Brake_Pressure**: Pressure applied to the braking system (in bar or psi).
- **Pad_Wear_Level**: Indicates how much the brake pads have worn down (in % or mm).
- **Wheel_Speed_FL**: Speed of the **front-left** wheel (in km/h).
- **Wheel_Speed_FR**: Speed of the **front-right** wheel (in km/h).
- **Wheel_Speed_RL**: Speed of the **rear-left** wheel (in km/h).
- **Wheel_Speed_RR**: Speed of the **rear-right** wheel (in km/h).
- **Fluid_Temperature**: Temperature of the brake fluid (in °C).
- **Pedal_Position**: Position of the brake pedal, indicating how far it is pressed (0–100%).

#### 🔠 Categorical Feature:

- **ABS_Status**: Anti-lock Braking System status —  
  - `1`: Active  
  - `0`: Inactive

#### 🎯 Target Variable:

- **Fault**:
  - `0`: Normal (No issue detected)  
  - `1`: Fault Detected (Brake system problem)
""")