"""
Shannon Equation for Dummies — Streamlit Application

Main entry point with sidebar navigation.
Designed for containerized deployment (Docker), multi-user, 24/7 operation.

Run with:
    streamlit run app.py --server.port 8080 --server.address 0.0.0.0
"""

import streamlit as st


# ──────────────────────────────────────────────────────────────────────────────
#  Page Configuration (must be first Streamlit call)
# ──────────────────────────────────────────────────────────────────────────────

st.set_page_config(
    page_title="Shannon's Equation for Dummies",
    page_icon="📡",
    layout="wide",
    initial_sidebar_state="expanded",
)


# ──────────────────────────────────────────────────────────────────────────────
#  Custom CSS for a modern, clean look
# ──────────────────────────────────────────────────────────────────────────────

st.markdown("""
<style>
    /* Main container */
    .block-container {
        padding-top: 2rem;
        padding-bottom: 2rem;
    }

    /* Metric styling */
    [data-testid="stMetric"] {
        background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
        border: 1px solid #0f3460;
        border-radius: 12px;
        padding: 16px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    }

    [data-testid="stMetricLabel"] {
        font-size: 0.85rem !important;
        color: #a0aec0 !important;
    }

    [data-testid="stMetricValue"] {
        font-size: 1.1rem !important;
        color: #e2e8f0 !important;
    }

    /* Sidebar */
    [data-testid="stSidebar"] {
        background: linear-gradient(180deg, #0d1b2a 0%, #1b2838 100%);
    }

    /* Tab styling */
    .stTabs [data-baseweb="tab-list"] {
        gap: 8px;
    }

    .stTabs [data-baseweb="tab"] {
        border-radius: 8px;
        padding: 8px 16px;
    }

    /* Dividers */
    hr {
        border-color: #1e3a5f !important;
    }

    /* Expanders */
    .streamlit-expanderHeader {
        font-size: 1rem;
        font-weight: 600;
    }

    /* Links */
    a {
        color: #4FC3F7 !important;
    }

    /* Info boxes */
    .stAlert {
        border-radius: 10px;
    }

    /* Hide Deploy button and hamburger menu */
    [data-testid="stMainMenu"],
    [data-testid="stToolbar"] {
        display: none !important;
    }
</style>
""", unsafe_allow_html=True)


# ──────────────────────────────────────────────────────────────────────────────
#  Sidebar Navigation
# ──────────────────────────────────────────────────────────────────────────────

with st.sidebar:
    st.markdown("## 📡 Shannon for Dummies")
    st.caption("Educational Application — AP Feb 2021")
    st.divider()

    page = st.radio(
        "Navigation",
        options=["animation", "orbits", "sat_types", "theory", "real_world", "contributions"],
        format_func=lambda x: {
            "animation": "📡 Satellite Link Animation",
            "orbits": "🌍 GEO / MEO / LEO Orbits",
            "sat_types": "🛰️ Satellite Missions & Types",
            "theory": "🧮 Theoretical Exploration",
            "real_world": "🛰️ Real World Link Budget",
            "contributions": "💬 Community Contributions",
        }[x],
        label_visibility="collapsed",
    )

    st.divider()

    st.markdown(
        "**About**\n\n"
        "Exploration from Claude Shannon's initial theory "
        "to its practical application to satellite communications.\n\n"
        "Built with [Streamlit](https://streamlit.io) · "
        "[Plotly](https://plotly.com)"
    )

    st.caption("© 2021-2026 · Shannon Equation for Dummies")


# ──────────────────────────────────────────────────────────────────────────────
#  Page Routing
# ──────────────────────────────────────────────────────────────────────────────

if page == "animation":
    from views.satellite_animation import render
    render()
elif page == "orbits":
    from views.orbits_animation import render
    render()
elif page == "sat_types":
    from views.satellite_types import render
    render()
elif page == "theory":
    from views.theory import render
    render()
elif page == "real_world":
    from views.real_world import render
    render()
elif page == "contributions":
    from views.contributions import render
    render()