import random
import pandas as pd
import streamlit as st
import pydeck as pdk
from datetime import datetime, timedelta
import altair as alt

# ---- Constants ----
POLES_PER_SITE = 12
SITES = {
    "Hyderabad": [17.385044, 78.486671],
    "Gadwal": [16.2351, 77.8052],
    "Kurnool": [15.8281, 78.0373],
    "Ballari": [12.9716, 77.5946]
}

# ---- Helper Functions ----
def generate_location(base_lat, base_lon):
    return [
        base_lat + random.uniform(-0.02, 0.02),
        base_lon + random.uniform(-0.02, 0.02)
    ]

def simulate_pole(pole_id, site_name):
    lat, lon = generate_location(*SITES[site_name])
    solar_kwh = round(random.uniform(3.0, 7.5), 2)
    wind_kwh = round(random.uniform(0.5, 2.0), 2)
    power_required = round(random.uniform(4.0, 8.0), 2)
    total_power = solar_kwh + wind_kwh
    power_status = 'Sufficient' if total_power >= power_required else 'Insufficient'

    vibration = round(random.uniform(0, 5), 2)
    camera_status = random.choice(['Online', 'Offline'])

    alert_level = 'Green'
    if vibration > 3:
        alert_level = 'Yellow'
    if vibration > 4.5:
        alert_level = 'Red'

    health_score = max(0, 100 - (vibration * 10))
    timestamp = datetime.now() - timedelta(hours=random.randint(0, 6))

    return {
        'Pole ID': f'{site_name[:3].upper()}-{pole_id:03}',
        'Site': site_name,
        'Latitude': lat,
        'Longitude': lon,
        'Solar (kWh)': solar_kwh,
        'Wind (kWh)': wind_kwh,
        'Power Required (kWh)': power_required,
        'Total Power (kWh)': total_power,
        'Power Status': power_status,
        'Vibration (g)': vibration,
        'Camera Status': camera_status,
        'Health Score': round(health_score, 2),
        'Alert Level': alert_level,
        'Last Checked': timestamp.strftime('%Y-%m-%d %H:%M:%S')
    }

# ---- Streamlit UI ----
st.set_page_config(page_title="Smart Pole Monitoring", layout="wide")
st.title("🌍 Smart Renewable Pole Monitoring - Multi-Site")

selected_site = st.selectbox("Select a site to view:", options=list(SITES.keys()), index=0)

if selected_site in SITES:
    with st.spinner(f"Simulating poles at {selected_site}..."):
        poles_data = [simulate_pole(i + 1, site) for site in SITES for i in range(POLES_PER_SITE)]
        df = pd.DataFrame(poles_data)
        site_df = df[df['Site'] == selected_site]

    # Summary Metrics
    col1, col2, col3 = st.columns(3)
    col1.metric("Total Poles", site_df.shape[0])
    col2.metric("Red Alerts", site_df[site_df['Alert Level'] == 'Red'].shape[0])
    col3.metric("Power Insufficiencies", site_df[site_df['Power Status'] == 'Insufficient'].shape[0])

    # Table View
    st.subheader(f"📋 Pole Data Table for {selected_site}")
    with st.expander("Filter Options"):
        alert_filter = st.multiselect("Alert Level", options=site_df['Alert Level'].unique(), default=site_df['Alert Level'].unique())
        camera_filter = st.multiselect("Camera Status", options=site_df['Camera Status'].unique(), default=site_df['Camera Status'].unique())

    filtered_df = site_df[(site_df['Alert Level'].isin(alert_filter)) & (site_df['Camera Status'].isin(camera_filter))]
    st.dataframe(filtered_df, use_container_width=True)

    # ---- Energy Chart ----
    st.subheader("🔋 Energy Generation per Pole")

    energy_long_df = site_df[['Pole ID', 'Solar (kWh)', 'Wind (kWh)']].melt(
        id_vars='Pole ID',
        value_vars=['Solar (kWh)', 'Wind (kWh)'],
        var_name='Energy Source',
        value_name='kWh'
    )

    bar_chart = alt.Chart(energy_long_df).mark_bar().encode(
        x=alt.X('Pole ID:N', sort=None, title='Pole ID'),
        y=alt.Y('kWh:Q'),
        color='Energy Source:N',
        tooltip=['Pole ID', 'Energy Source', 'kWh']
    ).properties(
        width=800,
        height=400
    ).configure_axisX(labelAngle=45)

    st.altair_chart(bar_chart, use_container_width=True)

    # ---- Fault Type Filter ----
    st.subheader("⚠️ Map Filter: Select Fault Type(s)")

    fault_options = ['High Vibration (>3g)', 'Camera Offline', 'Power Insufficient']
    selected_faults = st.multiselect("Show poles with these fault conditions:", options=fault_options, default=fault_options)

    def fault_condition(row):
        return (
            ('High Vibration (>3g)' in selected_faults and row['Vibration (g)'] > 3) or
            ('Camera Offline' in selected_faults and row['Camera Status'] == 'Offline') or
            ('Power Insufficient' in selected_faults and row['Power Status'] == 'Insufficient')
        )

    fault_df = site_df[site_df.apply(fault_condition, axis=1)] if selected_faults else site_df

    # ---- Map Color Logic ----
    def get_color(alert):
        if alert == 'Green':
            return [0, 255, 0, 160]
        elif alert == 'Yellow':
            return [255, 255, 0, 160]
        elif alert == 'Red':
            return [255, 0, 0, 160]
        return [128, 128, 128, 160]

    fault_df['color'] = fault_df['Alert Level'].apply(get_color)

    # ---- Map ----
    st.subheader("📍 Pole Locations with Selected Faults")
    st.pydeck_chart(pdk.Deck(
        initial_view_state=pdk.ViewState(
            latitude=SITES[selected_site][0],
            longitude=SITES[selected_site][1],
            zoom=12,
            pitch=50
        ),
        layers=[
            pdk.Layer(
                'ScatterplotLayer',
                data=fault_df,
                get_position='[Longitude, Latitude]',
                get_color='color',
                get_radius=100,
                pickable=True,
            )
        ],
        tooltip={
            "html": """
            <b>Pole ID:</b> {Pole ID}<br/>
            <b>Alert Level:</b> {Alert Level}<br/>
            <b>Health Score:</b> {Health Score}<br/>
            <b>Power Status:</b> {Power Status}<br/>
            <b>Vibration (g):</b> {Vibration (g)}<br/>
            <b>Camera:</b> {Camera Status}<br/>
            <b>Solar (kWh):</b> {Solar (kWh)}<br/>
            <b>Wind (kWh):</b> {Wind (kWh)}<br/>
            <b>Last Checked:</b> {Last Checked}
            """,
            "style": {
                "backgroundColor": "steelblue",
                "color": "white",
                "fontSize": "12px"
            }
        }
    ))