src/streamlit_app.py

import streamlit as st
import plotly.graph_objects as go
import pandas as pd

# --- Page Config ---
st.set_page_config(page_title="NSAKCET Dashboard", layout="wide")

# --- Sidebar ---
with st.sidebar:
    st.markdown("### NSAKCET")
    st.markdown("###")
    st.button("🏠 Dashboard")
    st.markdown("---")
    st.markdown("### Branches")
    branches = ["IT", "CSE", "CSE_DS", "CSE_AIML", "CSE_IOT", "CIVIL", "MECH"]
    for b in branches:
        st.button(f"💡 {b}")
    st.markdown("### Overview")
    st.button("🗓️ Daily")
    st.button("📆 Monthly")
    st.button("📊 Breakdown")
    st.markdown("### Management")
    st.button("👩‍🏫 Faculty")

# --- Header ---
st.markdown("## 📊 DASHBOARD")
st.markdown("Welcome to your dashboard")

# --- Top Stats ---
col1, col2, col3, col4 = st.columns(4)
with col1:
    st.metric("Total Branches", "30", help="Number of branches")
with col2:
    st.metric("Classes Today", "180", "Pending Today")
with col3:
    st.metric("Total Students", "+5%", "Since Last Year")
with col4:
    st.metric("Total Students", "1443", "NSAKCET Campus Students")

st.markdown("---")

# --- Main Content ---
col5, col6 = st.columns([2, 1])

# Line Chart (Monthly Classes)
with col5:
    st.markdown("### 📈 Monthly Class Count")
    months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
    values = [10000, 12000, 14000, 50000, 80000, 85000, 140000, 200000, 200000, 250000, 270000, 270000]

    fig = go.Figure()
    fig.add_trace(go.Scatter(x=months, y=values, mode='lines+markers', fill='tozeroy'))
    fig.update_layout(margin=dict(l=10, r=10, t=20, b=20), height=300)
    st.plotly_chart(fig, use_container_width=True)

# Doughnut Chart (Classes by Category)
with col6:
    st.markdown("### 🍩 Classes By Category")
    categories = ['Theory', 'Practicals', 'Seminars', 'Misc']
    sizes = [22803, 19545, 16288, 6515]

    fig2 = go.Figure(data=[go.Pie(labels=categories, values=sizes, hole=0.5)])
    fig2.update_traces(marker=dict(colors=['#fce38a', '#f38181', '#a8d8ea', '#eaffd0']),
                       textinfo='value+label')
    fig2.update_layout(margin=dict(l=0, r=0, t=0, b=0))
    st.plotly_chart(fig2, use_container_width=True)

st.markdown("---")

# --- Faculty Table Placeholder ---
st.markdown("### 👩‍🏫 Faculty Table")
df = pd.DataFrame(columns=["ID", "Faculty Name", "Branch", "#Subject"])
st.dataframe(df, use_container_width=True, height=200)

# --- Download Button ---
st.markdown("### 📥 Download Reports")
st.download_button("Download Reports", data="Report content here...", file_name="nsakcet_report.csv")