app.py

#!/usr/bin/env python3
"""
ECMWF Real Wind Particle Visualization with Dual Layers
Downloads current ECMWF 10m and 100m wind data and visualizes with particles
"""

import gradio as gr
import folium
from branca.element import Element
import json
import sys
import requests
import numpy as np
import xarray as xr
import tempfile
import os
from datetime import datetime, timedelta
import warnings

warnings.filterwarnings('ignore')

# Import ECMWF OpenData client
try:
    from ecmwf.opendata import Client as OpenDataClient
    OPENDATA_AVAILABLE = True
except ImportError:
    OPENDATA_AVAILABLE = False

def log_step(step, message):
    """Log each step with clear formatting"""
    print(f"🔄 STEP {step}: {message}")
    sys.stdout.flush()

class ECMWFWindDataProcessor:
    """Process real ECMWF wind data for particle visualization"""
    
    def __init__(self):
        self.temp_dir = tempfile.mkdtemp()
        self.client = None
        if OPENDATA_AVAILABLE:
            try:
                self.client = OpenDataClient()
            except:
                self.client = None
        
        # AWS S3 direct access URLs for ECMWF open data
        self.aws_base_url = "https://ecmwf-forecasts.s3.eu-central-1.amazonaws.com"
    
    def get_latest_forecast_info(self):
        """Get the latest available forecast run information"""
        try:
            # ECMWF runs at 00, 06, 12, 18 UTC
            now = datetime.utcnow()
            
            # Find the most recent model run (data available 7-9 hours after run time)
            for hours_back in range(4, 24, 6):  # Check recent runs
                test_time = now - timedelta(hours=hours_back)
                
                # Round to nearest 6-hour cycle
                run_hour = (test_time.hour // 6) * 6
                run_time = test_time.replace(hour=run_hour, minute=0, second=0, microsecond=0)
                
                date_str = run_time.strftime("%Y%m%d")
                time_str = f"{run_hour:02d}"
                
                return date_str, time_str, run_time
            
            # Fallback
            return now.strftime("%Y%m%d"), "12", now
            
        except Exception as e:
            # Emergency fallback
            now = datetime.utcnow()
            return now.strftime("%Y%m%d"), "12", now
    
    def download_wind_component(self, parameter="10u", step=0, max_retries=3):
        """Download ECMWF wind component data (10u, 10v, 100u, 100v)"""
        
        date_str, time_str, run_time = self.get_latest_forecast_info()
        
        # Method 1: Try ecmwf-opendata client (most reliable)
        if OPENDATA_AVAILABLE and self.client:
            try:
                filename = os.path.join(self.temp_dir, f'ecmwf_{parameter}_{step}h_{datetime.now().strftime("%Y%m%d_%H%M%S")}.grib')
                
                log_step("DOWNLOAD", f"Downloading {parameter} component via ECMWF client...")
                
                self.client.retrieve(
                    type="fc",      # forecast
                    param=parameter, # 10u, 10v, 100u, 100v
                    step=step,      # forecast hour
                    target=filename
                )
                
                if os.path.exists(filename) and os.path.getsize(filename) > 1000:
                    log_step("SUCCESS", f"Downloaded {parameter} component ({os.path.getsize(filename)} bytes)")
                    return filename, f"✅ ECMWF {parameter} data downloaded successfully!\\nRun: {date_str} {time_str}z, Step: +{step}h"
                    
            except Exception as e:
                log_step("ERROR", f"Client method failed: {str(e)}")
        
        return None, f"❌ Unable to download ECMWF {parameter} data"
    
    def extract_wind_data_from_grib(self, filename, parameter):
        """Extract wind data from GRIB file and return as array"""
        try:
            log_step("EXTRACT", f"Processing GRIB file for {parameter}...")
            
            # Open the GRIB file with xarray
            try:
                ds = xr.open_dataset(filename, engine='cfgrib', backend_kwargs={'indexpath': ''})
            except:
                ds = xr.open_dataset(filename, engine='cfgrib')
            
            # Find the right variable
            data_vars = list(ds.data_vars.keys())
            if not data_vars:
                return None, None, None, "No data variables found in file"
            
            data_var = data_vars[0]
            data = ds[data_var]
            
            # Handle coordinates
            if 'latitude' in ds.coords:
                lats = ds.latitude.values
                lons = ds.longitude.values
            elif 'lat' in ds.coords:
                lats = ds.lat.values
                lons = ds.lon.values
            else:
                return None, None, None, "Could not find latitude/longitude coordinates"
            
            # Get the data values (select first time step if multiple)
            if 'time' in data.dims and len(data.time) > 1:
                values = data.isel(time=0).values
            elif 'valid_time' in data.dims:
                values = data.isel(valid_time=0).values
            else:
                values = data.values
            
            # Handle 3D data (select first level if needed)
            if values.ndim > 2:
                values = values[0]
            
            log_step("SUCCESS", f"Extracted {parameter}: {values.shape} grid, lat range: {lats.min():.1f} to {lats.max():.1f}")
            
            ds.close()
            return lats, lons, values, "Success"
            
        except Exception as e:
            return None, None, None, f"Error extracting data: {str(e)}"
    
    def convert_to_wind_json(self, u_lats, u_lons, u_values, v_lats, v_lons, v_values, wind_level="10m"):
        """Convert ECMWF wind components to leaflet-velocity JSON format"""
        try:
            log_step("CONVERT", f"Converting ECMWF data to wind visualization format for {wind_level}...")
            
            # Ensure grids match
            if not (np.array_equal(u_lats, v_lats) and np.array_equal(u_lons, v_lons)):
                log_step("WARNING", "U and V grids don't match exactly, using U grid as reference")
            
            # Use U component grid as reference
            lats = u_lats
            lons = u_lons
            
            # Ensure lats are in descending order (North to South) for leaflet-velocity
            if lats[0] < lats[-1]:
                lats = lats[::-1]
                u_values = u_values[::-1, :]
                v_values = v_values[::-1, :]
            
            # Downsample to reduce data size for better performance
            # Skip every 4th point to reduce from 1M+ to ~65k points
            downsample_factor = 4
            lats = lats[::downsample_factor]
            lons = lons[::downsample_factor]
            u_values = u_values[::downsample_factor, ::downsample_factor]
            v_values = v_values[::downsample_factor, ::downsample_factor]
            
            
            # Convert to lists and flatten in row-major order
            u_data = u_values.flatten().tolist()
            v_data = v_values.flatten().tolist()
            
            # Replace any NaN values with 0
            u_data = [0.0 if np.isnan(x) else float(x) for x in u_data]
            v_data = [0.0 if np.isnan(x) else float(x) for x in v_data]
            
            # Create grid info
            ny, nx = u_values.shape
            lo1 = float(lons[0])
            lo2 = float(lons[-1])
            la1 = float(lats[0])   # North (highest)
            la2 = float(lats[-1])  # South (lowest)
            dx = float(lons[1] - lons[0])
            dy = float(lats[0] - lats[1])  # Should be positive since lats are descending
            
            current_time = datetime.utcnow()
            ref_time = current_time.strftime("%Y-%m-%d %H:00:00")
            
            # Create leaflet-velocity compatible JSON structure
            wind_data = [
                {
                    "header": {
                        "discipline": 0,
                        "parameterCategory": 2,
                        "parameterNumber": 2,
                        "parameterName": "UGRD",
                        "parameterNumberName": "eastward_wind",
                        "nx": nx,
                        "ny": ny,
                        "lo1": lo1,
                        "la1": la1,
                        "lo2": lo2,
                        "la2": la2,
                        "dx": dx,
                        "dy": dy,
                        "refTime": ref_time
                    },
                    "data": u_data
                },
                {
                    "header": {
                        "discipline": 0,
                        "parameterCategory": 2,
                        "parameterNumber": 3,
                        "parameterName": "VGRD",
                        "parameterNumberName": "northward_wind",
                        "nx": nx,
                        "ny": ny,
                        "lo1": lo1,
                        "la1": la1,
                        "lo2": lo2,
                        "la2": la2,
                        "dx": dx,
                        "dy": dy,
                        "refTime": ref_time
                    },
                    "data": v_data
                }
            ]
            
            log_step("SUCCESS", f"Converted {wind_level} to wind JSON: {nx}x{ny} grid, {len(u_data)} points each")
            
            return wind_data, f"Successfully converted ECMWF {wind_level} data to wind visualization format"
            
        except Exception as e:
            return None, f"Error converting data: {str(e)}"

def fetch_real_ecmwf_wind_data():
    """Download and process real ECMWF 10m and 100m wind data"""
    log_step("WIND-1", "🌍 Fetching REAL ECMWF wind data (10m and 100m)...")
    
    processor = ECMWFWindDataProcessor()
    
    try:
        # Download 10m wind components
        log_step("WIND-2", "Downloading 10m U wind component...")
        u10_file, u10_msg = processor.download_wind_component("10u", step=0)
        
        log_step("WIND-3", "Downloading 10m V wind component...")
        v10_file, v10_msg = processor.download_wind_component("10v", step=0)
        
        # Download 100m wind components
        log_step("WIND-4", "Downloading 100m U wind component...")
        u100_file, u100_msg = processor.download_wind_component("100u", step=0)
        
        log_step("WIND-5", "Downloading 100m V wind component...")
        v100_file, v100_msg = processor.download_wind_component("100v", step=0)
        
        # Process 10m data
        wind_data_10m = None
        if u10_file and v10_file:
            log_step("WIND-6", "Processing 10m wind data...")
            u10_lats, u10_lons, u10_values, u10_status = processor.extract_wind_data_from_grib(u10_file, "10u")
            v10_lats, v10_lons, v10_values, v10_status = processor.extract_wind_data_from_grib(v10_file, "10v")
            
            if u10_values is not None and v10_values is not None:
                wind_data_10m, convert_msg = processor.convert_to_wind_json(
                    u10_lats, u10_lons, u10_values, v10_lats, v10_lons, v10_values, "10m"
                )
        
        # Process 100m data
        wind_data_100m = None
        if u100_file and v100_file:
            log_step("WIND-7", "Processing 100m wind data...")
            u100_lats, u100_lons, u100_values, u100_status = processor.extract_wind_data_from_grib(u100_file, "100u")
            v100_lats, v100_lons, v100_values, v100_status = processor.extract_wind_data_from_grib(v100_file, "100v")
            
            if u100_values is not None and v100_values is not None:
                wind_data_100m, convert_msg = processor.convert_to_wind_json(
                    u100_lats, u100_lons, u100_values, v100_lats, v100_lons, v100_values, "100m"
                )
        
        # Return real data if available, otherwise fallback
        if wind_data_10m is None:
            wind_data_10m = generate_synthetic_wind_data("10m")
        if wind_data_100m is None:
            wind_data_100m = generate_synthetic_wind_data("100m")
        
        log_step("WIND-8", f"✅ SUCCESS: Wind data ready!")
        
        return wind_data_10m, wind_data_100m
        
    except Exception as e:
        log_step("WIND-ERROR", f"Failed to fetch real wind data: {str(e)}")
        log_step("WIND-FALLBACK", "Falling back to synthetic data...")
        
        # Fallback to synthetic data
        return generate_synthetic_wind_data("10m"), generate_synthetic_wind_data("100m")

def fetch_ecmwf_forecast_data(forecast_hours=[0, 3, 6, 12, 18, 24]):
    """Download and process ECMWF forecast data for multiple hours"""
    log_step("FORECAST-1", f"🌍 Fetching ECMWF forecast data for hours: {forecast_hours}")
    
    processor = ECMWFWindDataProcessor()
    forecast_data = {}
    
    try:
        for hour in forecast_hours:
            log_step("FORECAST-2", f"Downloading forecast data for {hour}h...")
            
            # Download wind components for this forecast hour
            u10_file, u10_msg = processor.download_wind_component("10u", step=hour)
            v10_file, v10_msg = processor.download_wind_component("10v", step=hour)
            u100_file, u100_msg = processor.download_wind_component("100u", step=hour)
            v100_file, v100_msg = processor.download_wind_component("100v", step=hour)
            
            # Process 10m forecast data
            wind_data_10m = None
            if u10_file and v10_file:
                log_step("FORECAST-3", f"Processing {hour}h 10m forecast data...")
                u10_lats, u10_lons, u10_values, u10_status = processor.extract_wind_data_from_grib(u10_file, "10u")
                v10_lats, v10_lons, v10_values, v10_status = processor.extract_wind_data_from_grib(v10_file, "10v")
                
                if u10_values is not None and v10_values is not None:
                    wind_data_10m, convert_msg = processor.convert_to_wind_json(
                        u10_lats, u10_lons, u10_values, v10_lats, v10_lons, v10_values, "10m"
                    )
            
            # Process 100m forecast data
            wind_data_100m = None
            if u100_file and v100_file:
                log_step("FORECAST-4", f"Processing {hour}h 100m forecast data...")
                u100_lats, u100_lons, u100_values, u100_status = processor.extract_wind_data_from_grib(u100_file, "100u")
                v100_lats, v100_lons, v100_values, v100_status = processor.extract_wind_data_from_grib(v100_file, "100v")
                
                if u100_values is not None and v100_values is not None:
                    wind_data_100m, convert_msg = processor.convert_to_wind_json(
                        u100_lats, u100_lons, u100_values, v100_lats, v100_lons, v100_values, "100m"
                    )
            
            # Use fallback if no real data available
            if wind_data_10m is None:
                wind_data_10m = generate_synthetic_wind_data("10m")
            if wind_data_100m is None:
                wind_data_100m = generate_synthetic_wind_data("100m")
            
            # Store forecast data for this hour
            forecast_data[hour] = {
                "10m": wind_data_10m,
                "100m": wind_data_100m,
                "timestamp": hour
            }
            
            log_step("FORECAST-5", f"✅ {hour}h forecast data ready!")
        
        log_step("FORECAST-6", f"✅ SUCCESS: All forecast data ready for hours {list(forecast_data.keys())}")
        return forecast_data
        
    except Exception as e:
        log_step("FORECAST-ERROR", f"Failed to fetch forecast data: {str(e)}")
        log_step("FORECAST-FALLBACK", "Falling back to synthetic forecast data...")
        
        # Fallback: create synthetic forecast data for all hours
        fallback_data = {}
        for hour in forecast_hours:
            fallback_data[hour] = {
                "10m": generate_synthetic_wind_data("10m"),
                "100m": generate_synthetic_wind_data("100m"),
                "timestamp": hour
            }
        
        return fallback_data

def generate_synthetic_wind_data(wind_level="10m"):
    """Generate synthetic wind data as fallback"""
    log_step("GEN-1", f"Generating synthetic {wind_level} wind data...")
    
    # Basic global grid
    nx, ny = 72, 36
    lon_min, lon_max = -180, 175
    lat_min, lat_max = -85, 85
    
    lons = np.linspace(lon_min, lon_max, nx)
    lats = np.linspace(lat_max, lat_min, ny)
    
    u_data = []
    v_data = []
    
    # Adjust wind strength based on level
    strength_multiplier = 1.5 if wind_level == "100m" else 1.0
    
    for j, lat in enumerate(lats):
        for i, lon in enumerate(lons):
            # Simple wind pattern with different strength for different levels
            u = (10 * np.sin(np.radians(lon/2)) + np.random.normal(0, 3)) * strength_multiplier
            v = (5 * np.cos(np.radians(lat)) + np.random.normal(0, 2)) * strength_multiplier
            
            u_data.append(round(u, 2))
            v_data.append(round(v, 2))
    
    current_time = datetime.utcnow()
    ref_time = current_time.strftime("%Y-%m-%d %H:00:00")
    
    wind_data = [
        {
            "header": {
                "discipline": 0,
                "parameterCategory": 2,
                "parameterNumber": 2,
                "parameterName": "UGRD",
                "parameterNumberName": "eastward_wind",
                "nx": nx,
                "ny": ny,
                "lo1": lon_min,
                "la1": lat_max,
                "lo2": lon_max,
                "la2": lat_min,
                "dx": 5.0,
                "dy": 5.0,
                "refTime": ref_time
            },
            "data": u_data
        },
        {
            "header": {
                "discipline": 0,
                "parameterCategory": 2,
                "parameterNumber": 3,
                "parameterName": "VGRD",
                "parameterNumberName": "northward_wind",
                "nx": nx,
                "ny": ny,
                "lo1": lon_min,
                "la1": lat_max,
                "lo2": lon_max,
                "la2": lat_min,
                "dx": 5.0,
                "dy": 5.0,
                "refTime": ref_time
            },
            "data": v_data
        }
    ]
    
    log_step("GEN-2", f"Generated synthetic {wind_level} wind data: {len(u_data)} points")
    return wind_data

def create_wind_map(region="global", forecast_mode=False):
    """Create Leaflet-Velocity wind map with real ECMWF data"""
    
    # Set map parameters based on region
    if region == "global":
        center = [20, 0]
        zoom = 2
    elif region == "north_america":
        center = [40, -100]
        zoom = 3
    elif region == "europe":
        center = [50, 10]
        zoom = 4
    else:
        center = [20, 0]
        zoom = 2
    
    # Create map with dark theme as default
    m = folium.Map(
        location=center,
        tiles=None,  # We'll add custom tiles without attribution
        zoom_start=zoom,
        control_scale=False,  # Disable scale control
        width='100%',
        height='80vh'  # Use viewport height for better mobile scaling
    )
    
    # Add CartoDB dark matter tiles with minimal attribution (hidden by CSS)
    folium.TileLayer(
        tiles='https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}{r}.png',
        attr='© CartoDB',  # Minimal required attribution
        name='Dark Matter',
        overlay=False,
        control=True,
        max_zoom=19
    ).add_to(m)
    
    # Add light theme option (but don't make it active by default)
    folium.TileLayer(
        tiles='https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}{r}.png',
        attr='© CartoDB',  # Minimal required attribution
        name="Light Matter",
        overlay=False,
        control=False,  # We'll control this with our custom button
        max_zoom=19
    ).add_to(m)
    
    # Fetch ECMWF wind data based on mode
    if forecast_mode:
        log_step(5, "Fetching ECMWF forecast data...")
        forecast_data = fetch_ecmwf_forecast_data()
        # Start with 0h forecast data
        wind_data_10m = forecast_data[0]["10m"] 
        wind_data_100m = forecast_data[0]["100m"]
        log_step(6, f"Forecast data ready: {len(forecast_data)} hours, starting with 0h")
    else:
        log_step(5, "Fetching real ECMWF current data...")
        wind_data_10m, wind_data_100m = fetch_real_ecmwf_wind_data()
        forecast_data = None
        log_step(6, f"Current data ready: 10m={len(wind_data_10m)} components, 100m={len(wind_data_100m)} components")
    
    # Add Leaflet-Velocity from CDN with comprehensive mobile CSS
    velocity_css = """
    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
    <style>
    /* Comprehensive white bar elimination */
    .leaflet-control-attribution,
    .leaflet-bottom,
    .leaflet-control-container .leaflet-bottom,
    .leaflet-bottom.leaflet-right,
    .leaflet-bottom.leaflet-left,
    .leaflet-control-scale,
    .leaflet-control-scale-line {
        display: none !important;
        visibility: hidden !important;
        height: 0 !important;
        width: 0 !important;
        opacity: 0 !important;
    }
    
    /* Remove any padding/margin that might create white space */
    .leaflet-container {
        margin: 0 !important;
        padding: 0 !important;
        border: none !important;
        outline: none !important;
        background: transparent !important;
    }
    
    .leaflet-map-pane,
    .leaflet-tile-pane,
    .leaflet-overlay-pane {
        margin: 0 !important;
        padding: 0 !important;
        background: transparent !important;
    }
    
    /* Mobile responsiveness for forecast controls */
    @media (max-width: 768px) {
        .forecast-controls {
            bottom: 5px !important;
            left: 5px !important;
            right: 5px !important;
            transform: none !important;
            width: auto !important;
            padding: 15px !important;
            font-size: 14px !important;
        }
        .forecast-timeline {
            flex-wrap: wrap !important;
            justify-content: center !important;
            gap: 8px !important;
        }
        .forecast-hour-btn {
            min-width: 35px !important;
            padding: 8px 10px !important;
            font-size: 12px !important;
            margin: 2px !important;
        }
        .forecast-prev, .forecast-next {
            width: 40px !important;
            height: 40px !important;
            font-size: 18px !important;
        }
        .forecast-hour-display {
            font-size: 16px !important;
            min-width: 35px !important;
        }
        .wind-controls {
            top: 5px !important;
            right: 5px !important;
            padding: 8px !important;
        }
        .wind-controls button {
            width: 140px !important;
            padding: 8px !important;
            font-size: 12px !important;
        }
        .leaflet-container {
            height: 85vh !important;
        }
    }
    
    /* Small mobile phones */
    @media (max-width: 480px) {
        .forecast-controls {
            padding: 10px 8px !important;
            font-size: 12px !important;
        }
        .forecast-hour-btn {
            min-width: 30px !important;
            padding: 6px 8px !important;
            font-size: 11px !important;
        }
        .forecast-prev, .forecast-next {
            width: 35px !important;
            height: 35px !important;
            font-size: 16px !important;
        }
        .wind-controls {
            padding: 6px !important;
        }
        .wind-controls button {
            width: 120px !important;
            padding: 6px !important;
            font-size: 11px !important;
        }
        .leaflet-container {
            height: 90vh !important;
        }
        /* Mobile Gradio interface improvements */
        .gradio-container {
            max-width: 100% !important;
            padding: 0 !important;
        }
        .gr-row {
            flex-direction: column !important;
        }
        .gr-column {
            width: 100% !important;
            max-width: 100% !important;
        }
    }
    
    /* Hide Gradio controls on very small screens to maximize map space */
    @media (max-width: 480px) and (orientation: portrait) {
        .gradio-container .gr-row:first-child {
            display: none !important;
        }
        .leaflet-container {
            height: 95vh !important;
        }
    }
    </style>
    """
    m.get_root().html.add_child(Element(velocity_css))
    
    velocity_js = """
    <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/leaflet-velocity@1.8.0/dist/leaflet-velocity.min.js"></script>
    """
    m.get_root().html.add_child(Element(velocity_js))
    
    # Get map variable name
    map_id = m.get_name()
    
    # Add wind visualization with embedded data
    js_code = f"""
    <script>
    setTimeout(function() {{
        console.log("Initializing wind particles...");
        
        var map = {map_id};
        var windData10m = {json.dumps(wind_data_10m)};
        var windData100m = {json.dumps(wind_data_100m)};
        var forecastMode = {json.dumps(forecast_mode)};
        var forecastData = {json.dumps(forecast_data) if forecast_data else 'null'};
        var currentForecastHour = 0;
        var availableForecastHours = {json.dumps(list(forecast_data.keys()) if forecast_data else [])};
        
        console.log("Wind data loaded - Forecast mode:", forecastMode);
        console.log("10m Wind data loaded:", windData10m);
        console.log("100m Wind data loaded:", windData100m);
        if (forecastData) {{
            console.log("Forecast data loaded for hours:", availableForecastHours);
        }}
        
        // Variables to track velocity layers
        var current10mLayer = null;
        var current100mLayer = null;
        var show10m = true;
        var show100m = false;
        
        // Function to get theme-appropriate color scale
        function getColorScale(windType) {{
            // Check if we're on light theme by looking at current tile layer
            var currentTileLayer = 'dark'; // default to dark
            map.eachLayer(function(layer) {{
                if (layer.options && layer.options.attribution) {{
                    if (layer.options.attribution.includes('Light Matter') || 
                        layer.options.attribution.includes('light_all')) {{
                        currentTileLayer = 'light';
                    }}
                }}
                // Also check tile URL patterns
                if (layer._url && layer._url.includes('light_all')) {{
                    currentTileLayer = 'light';
                }}
            }});
            
            console.log("Current theme detected:", currentTileLayer);
            
            // Different color schemes for 10m (blue) and 100m (red) winds
            if (windType === '100m') {{
                // Red color scheme for 100m winds
                if (currentTileLayer === 'light') {{
                    // DARK red colors for light theme (maximum contrast on white)
                    return [
                        "#4c0000", "#660000", "#800000", "#990000", "#b30000",
                        "#cc0000", "#e60000", "#ff0000", "#ff3333", "#ff6666", "#ff9999"
                    ];
                }} else {{
                    // LIGHT red colors for dark theme (maximum visibility on black)
                    return [
                        "#ff9999", "#ff6666", "#ff3333", "#ff0000", "#e60000", 
                        "#cc0000", "#b30000", "#990000", "#800000", "#660000", "#ffcccc"
                    ];
                }}
            }} else {{
                // Blue color scheme for 10m winds
                if (currentTileLayer === 'light') {{
                    // DARK blue colors for light theme (maximum contrast on white)
                    return [
                        "#000066", "#000080", "#000099", "#0000b3", "#0000cc", 
                        "#0000e6", "#0000ff", "#3333ff", "#6666ff", "#9999ff", "#ccccff"
                    ];
                }} else {{
                    // LIGHT blue colors for dark theme (maximum visibility on black)
                    return [
                        "#ccccff", "#9999ff", "#6666ff", "#3333ff", "#0000ff", 
                        "#0000e6", "#0000cc", "#0000b3", "#000099", "#000080", "#ffffff"
                    ];
                }}
            }}
        }}
        
        // Check if L.velocityLayer exists with retry logic
        if (typeof L === 'undefined') {{
            console.error("❌ Leaflet library not loaded!");
            console.error("Retrying in 2 seconds...");
            setTimeout(arguments.callee, 2000);
            return;
        }}
        
        if (typeof L.velocityLayer === 'undefined') {{
            console.error("❌ Leaflet-Velocity plugin not loaded!");
            console.error("Retrying in 2 seconds...");
            setTimeout(arguments.callee, 2000);
            return;
        }}
        console.log("✅ Libraries loaded successfully");
        
        // Function to create 10m wind layer
        function create10mLayer() {{
            return L.velocityLayer({{
                data: windData10m,
                displayValues: true,
                displayOptions: {{
                    velocityType: "10m Wind",
                    position: "bottomright",
                    emptyString: "No wind data",
                    speedUnit: "m/s",
                    angleConvention: "bearingCW",
                    showCardinal: true
                }},
                velocityScale: 0.01,    // Further reduced to prevent jumping artifacts
                opacity: 0.9,
                maxVelocity: 20,
                particleMultiplier: 0.002,  // Further reduced: 0.004 → 0.002 (less frequent)
                lineWidth: 1.2,  // Even thinner lines
                colorScale: getColorScale('10m'),
                frameRate: 15,   // Lower frame rate for less frequent updates
                particleAge: 40, // Shorter particle life
                fadeOpacity: 0,  // No fade animation - instant clear
                animationDuration: 0, // No animation delay
                // Stricter bounds to prevent jumping particles at far zoom
                bounds: [[-80, -170], [80, 170]], // Stricter lat/lon bounds
                wrapX: false,    // Disable longitude wrapping to prevent jumps
                noWrap: true,    // Additional no-wrap protection
                minZoom: 2,      // Don't render below zoom level 2
                // Much shorter tails, especially for slow winds
                velocityAgeScale: [
                    [0, 3],       // Very slow winds = extremely short tails
                    [2, 6],       // Low winds = very short tails  
                    [5, 12],      // Moderate winds = short tails
                    [10, 20],     // Fast winds = medium tails
                    [20, 30]      // Very fast winds = longer tails (much reduced)
                ]
            }});
        }}
        
        // Function to create 100m wind layer
        function create100mLayer() {{
            return L.velocityLayer({{
                data: windData100m,
                displayValues: true,
                displayOptions: {{
                    velocityType: "100m Wind",
                    position: "bottomleft",
                    emptyString: "No wind data",
                    speedUnit: "m/s",
                    angleConvention: "bearingCW",
                    showCardinal: true
                }},
                velocityScale: 0.012,   // Further reduced to prevent jumping artifacts
                opacity: 0.8,
                maxVelocity: 30,
                particleMultiplier: 0.0015, // Further reduced: 0.003 → 0.0015 (less frequent)
                lineWidth: 1.6,  // Thinner lines
                colorScale: getColorScale('100m'),
                frameRate: 15,   // Lower frame rate for less frequent updates
                particleAge: 50, // Shorter particle life
                fadeOpacity: 0,  // No fade animation - instant clear
                animationDuration: 0, // No animation delay
                // Stricter bounds to prevent jumping particles at far zoom
                bounds: [[-80, -170], [80, 170]], // Stricter lat/lon bounds
                wrapX: false,    // Disable longitude wrapping to prevent jumps
                noWrap: true,    // Additional no-wrap protection
                minZoom: 2,      // Don't render below zoom level 2
                // Much shorter tails, especially for slow winds
                velocityAgeScale: [
                    [0, 5],       // Very slow winds = extremely short tails
                    [3, 10],      // Low winds = very short tails  
                    [8, 18],      // Moderate winds = short tails
                    [15, 28],     // Fast winds = medium tails
                    [25, 40]      // Very fast winds = longer tails (much reduced)
                ]
            }});
        }}
        
        // Forecast management functions
        function updateWindDataForForecastHour(hour) {{
            if (!forecastData || !forecastData[hour]) {{
                console.warn("No forecast data available for hour " + hour);
                return false;
            }}
            
            console.log("📅 Updating wind data to forecast hour " + hour + "h");
            windData10m = forecastData[hour]["10m"];
            windData100m = forecastData[hour]["100m"];
            currentForecastHour = hour;
            
            // Update forecast hour display
            updateForecastDisplay();
            
            return true;
        }}
        
        function updateForecastDisplay() {{
            var forecastDisplay = document.getElementById('forecast-hour-display');
            if (forecastDisplay) {{
                forecastDisplay.innerHTML = currentForecastHour + "h";
            }}
        }}
        
        function switchToForecastHour(hour) {{
            if (!forecastMode) {{
                console.log("Not in forecast mode, switching ignored");
                return;
            }}
            
            console.log("🔄 Switching to forecast hour " + hour + "h");
            
            // Update wind data
            if (updateWindDataForForecastHour(hour)) {{
                // Clear existing particles and reload with new forecast data
                clearAllParticles();
                setTimeout(reloadParticlesAfterMove, 100);
                console.log("✅ Switched to forecast hour " + hour + "h");
            }}
        }}
        
        try {{
            // Create initial 10m layer
            if (show10m) {{
                current10mLayer = create10mLayer();
                current10mLayer.addTo(map);
                console.log("✅ 10m wind particles added successfully!");
            }}
            
            // Optionally create 100m layer
            if (show100m) {{
                current100mLayer = create100mLayer();
                current100mLayer.addTo(map);
                console.log("✅ 100m wind particles added successfully!");
            }}
            
            // Function to toggle 10m wind layer
            function toggle10mLayer() {{
                show10m = !show10m;
                
                // Force clear any existing 10m particles from map
                map.eachLayer(function(layer) {{
                    if (layer.options && layer.options.displayOptions && 
                        layer.options.displayOptions.velocityType === "10m Wind") {{
                        try {{
                            map.removeLayer(layer);
                            console.log("🗑️ Force removed 10m layer from map");
                        }} catch(e) {{
                            console.warn("Error force removing 10m layer:", e);
                        }}
                    }}
                }});
                
                // Clear tracked layer reference
                if (current10mLayer) {{
                    try {{
                        map.removeLayer(current10mLayer);
                    }} catch(e) {{
                        console.warn("Error removing tracked 10m layer:", e);
                    }}
                    current10mLayer = null;
                }}
                
                if (show10m) {{
                    current10mLayer = create10mLayer();
                    current10mLayer.addTo(map);
                    console.log("✅ 10m wind layer enabled");
                }} else {{
                    console.log("❌ 10m wind layer disabled - ALL particles cleared");
                }}
            }}
            
            // Function to toggle 100m wind layer
            function toggle100mLayer() {{
                show100m = !show100m;
                
                // Force clear any existing 100m particles from map
                map.eachLayer(function(layer) {{
                    if (layer.options && layer.options.displayOptions && 
                        layer.options.displayOptions.velocityType === "100m Wind") {{
                        try {{
                            map.removeLayer(layer);
                            console.log("🗑️ Force removed 100m layer from map");
                        }} catch(e) {{
                            console.warn("Error force removing 100m layer:", e);
                        }}
                    }}
                }});
                
                // Clear tracked layer reference
                if (current100mLayer) {{
                    try {{
                        map.removeLayer(current100mLayer);
                    }} catch(e) {{
                        console.warn("Error removing tracked 100m layer:", e);
                    }}
                    current100mLayer = null;
                }}
                
                if (show100m) {{
                    current100mLayer = create100mLayer();
                    current100mLayer.addTo(map);
                    console.log("✅ 100m wind layer enabled");
                }} else {{
                    console.log("❌ 100m wind layer disabled - ALL particles cleared");
                }}
            }}
            
            // Function to reload particles with new theme colors
            function reloadParticlesWithTheme() {{
                console.log("🎨 Theme changed, updating particle colors...");
                
                // Reload 10m layer if active
                if (show10m && current10mLayer) {{
                    map.removeLayer(current10mLayer);
                    current10mLayer = create10mLayer();
                    current10mLayer.addTo(map);
                }}
                
                // Reload 100m layer if active
                if (show100m && current100mLayer) {{
                    map.removeLayer(current100mLayer);
                    current100mLayer = create100mLayer();
                    current100mLayer.addTo(map);
                }}
                
                console.log("⚡ Particle colors updated for theme!");
            }}
            
            // Function to clear all particles immediately without fade
            function clearAllParticles() {{
                console.log("🚫 INSTANTLY clearing all particles...");
                
                // Force instant removal of 10m particles
                if (current10mLayer) {{
                    try {{
                        // Stop any animations and remove immediately
                        if (current10mLayer._map) {{
                            current10mLayer._map.removeLayer(current10mLayer);
                        }}
                        map.removeLayer(current10mLayer);
                        // Force clear the canvas if velocity layer has one
                        if (current10mLayer._canvas) {{
                            var ctx = current10mLayer._canvas.getContext('2d');
                            ctx.clearRect(0, 0, current10mLayer._canvas.width, current10mLayer._canvas.height);
                        }}
                    }} catch(e) {{
                        console.warn("Error during 10m instant clear:", e);
                    }}
                    current10mLayer = null;
                    console.log("⚡ 10m particles INSTANTLY cleared");
                }}
                
                // Force instant removal of 100m particles
                if (current100mLayer) {{
                    try {{
                        // Stop any animations and remove immediately
                        if (current100mLayer._map) {{
                            current100mLayer._map.removeLayer(current100mLayer);
                        }}
                        map.removeLayer(current100mLayer);
                        // Force clear the canvas if velocity layer has one
                        if (current100mLayer._canvas) {{
                            var ctx = current100mLayer._canvas.getContext('2d');
                            ctx.clearRect(0, 0, current100mLayer._canvas.width, current100mLayer._canvas.height);
                        }}
                    }} catch(e) {{
                        console.warn("Error during 100m instant clear:", e);
                    }}
                    current100mLayer = null;
                    console.log("⚡ 100m particles INSTANTLY cleared");
                }}
                
                // Force a map refresh to ensure clean state
                setTimeout(function() {{
                    map.invalidateSize();
                }}, 10);
            }}
            
            // Function to reload particles after pan/zoom with consistent behavior
            function reloadParticlesAfterMove() {{
                console.log("⚡ RELOADING particles with consistent behavior...");
                
                // Get current zoom for logging
                var currentZoom = map.getZoom();
                
                // Force map refresh to ensure proper positioning
                map.invalidateSize();
                
                // Always respect current toggle states - recreate layers if toggles are ON
                if (show10m) {{
                    // Force clean creation of 10m layer
                    if (current10mLayer) {{
                        try {{ map.removeLayer(current10mLayer); }} catch(e) {{}}
                    }}
                    current10mLayer = create10mLayer();
                    current10mLayer.addTo(map);
                    console.log("⚡ 10m particles RECREATED at correct position (zoom " + currentZoom + ")");
                }} else {{
                    console.log("⚠️ 10m particles NOT reloaded (toggle OFF)");
                }}
                
                if (show100m) {{
                    // Force clean creation of 100m layer
                    if (current100mLayer) {{
                        try {{ map.removeLayer(current100mLayer); }} catch(e) {{}}
                    }}
                    current100mLayer = create100mLayer();
                    current100mLayer.addTo(map);
                    console.log("⚡ 100m particles RECREATED at correct position (zoom " + currentZoom + ")");
                }} else {{
                    console.log("⚠️ 100m particles NOT reloaded (toggle OFF)");
                }}
                
                console.log("✅ Consistent particle reload complete - pan/zoom behavior now identical!");
            }}
            
            // Add pan/zoom event handlers - different behavior for pan vs zoom
            map.on('movestart', function() {{
                console.log("📌 PAN START: Particles staying in place during pan...");
                // Do NOT clear particles during pan - let them stay until pan ends
            }});
            
            map.on('zoomstart', function() {{
                console.log("⚡ ZOOM START: Clearing particles INSTANTLY...");
                // INSTANT particle clearing on zoom start to prevent disorientation
                clearAllParticles();
            }});
            
            // Handle movement end for both pan and zoom
            function handleMovementEnd(eventType) {{
                console.log("⚡ " + eventType + " END: Clearing and reloading particles...");
                
                // Clear particles (for zoom this is redundant since already cleared on zoomstart)
                clearAllParticles();
                
                // Check zoom level to prevent particle artifacts at far zoom
                var currentZoom = map.getZoom();
                if (currentZoom < 2) {{
                    console.log("⚠️ Zoom level " + currentZoom + " too far out, NOT reloading particles to prevent jumps");
                    // Don't reload particles at far zoom to prevent jumpers
                    return;
                }}
                
                // Reload particles at correct position - same for both pan and zoom
                setTimeout(reloadParticlesAfterMove, 200);
            }}
            
            map.on('moveend', function() {{
                handleMovementEnd("PAN");
            }});
            
            map.on('zoomend', function() {{
                handleMovementEnd("ZOOM");
            }});
            
            
            // Event handler for theme changes
            map.on('baselayerchange', function() {{
                setTimeout(reloadParticlesWithTheme, 100); // Small delay to ensure theme change is complete
            }});
            
            // Add custom controls for wind layer toggles
            var windControlDiv = L.DomUtil.create('div', 'wind-controls');
            windControlDiv.style.position = 'absolute';
            windControlDiv.style.top = '10px';
            windControlDiv.style.right = '10px';
            windControlDiv.style.zIndex = '1000';
            windControlDiv.style.background = 'rgba(255,255,255,0.9)';
            windControlDiv.style.padding = '10px';
            windControlDiv.style.borderRadius = '5px';
            windControlDiv.style.boxShadow = '0 2px 5px rgba(0,0,0,0.2)';
            windControlDiv.style.fontFamily = 'Arial, sans-serif';
            windControlDiv.style.fontSize = '12px';
            
            var button10m = L.DomUtil.create('button', 'wind-toggle-10m', windControlDiv);
            button10m.innerHTML = '🌪️ 10m Winds (ON)';
            button10m.style.display = 'block';
            button10m.style.width = '120px';
            button10m.style.margin = '2px 0';
            button10m.style.padding = '5px';
            button10m.style.border = 'none';
            button10m.style.borderRadius = '3px';
            button10m.style.background = '#3b82f6';
            button10m.style.color = 'white';
            button10m.style.cursor = 'pointer';
            button10m.style.fontSize = '11px';
            
            var button100m = L.DomUtil.create('button', 'wind-toggle-100m', windControlDiv);
            button100m.innerHTML = '🚁 100m Winds (OFF)';
            button100m.style.display = 'block';
            button100m.style.width = '120px';
            button100m.style.margin = '2px 0';
            button100m.style.padding = '5px';
            button100m.style.border = 'none';
            button100m.style.borderRadius = '3px';
            button100m.style.background = '#6b7280';
            button100m.style.color = 'white';
            button100m.style.cursor = 'pointer';
            button100m.style.fontSize = '11px';
            
            // Add theme toggle button
            var buttonTheme = L.DomUtil.create('button', 'theme-toggle', windControlDiv);
            buttonTheme.innerHTML = '🌙 Dark Matter';
            buttonTheme.style.display = 'block';
            buttonTheme.style.width = '120px';
            buttonTheme.style.margin = '2px 0';
            buttonTheme.style.padding = '5px';
            buttonTheme.style.border = 'none';
            buttonTheme.style.borderRadius = '3px';
            buttonTheme.style.background = '#374151';
            buttonTheme.style.color = 'white';
            buttonTheme.style.cursor = 'pointer';
            buttonTheme.style.fontSize = '11px';
            
            // Event handlers for toggle buttons
            L.DomEvent.on(button10m, 'click', function() {{
                toggle10mLayer();
                button10m.innerHTML = show10m ? '🌪️ 10m Winds (ON)' : '🌪️ 10m Winds (OFF)';
                button10m.style.background = show10m ? '#3b82f6' : '#6b7280';
            }});
            
            L.DomEvent.on(button100m, 'click', function() {{
                toggle100mLayer();
                button100m.innerHTML = show100m ? '🚁 100m Winds (ON)' : '🚁 100m Winds (OFF)';
                button100m.style.background = show100m ? '#dc2626' : '#6b7280';
            }});
            
            // Theme toggle functionality
            var isLightTheme = false;  // Start with dark theme
            var currentTileLayer = null;
            
            // Find and store the current base layer
            map.eachLayer(function(layer) {{
                if (layer.options && layer.options.attribution && layer.options.attribution.includes('CartoDB')) {{
                    currentTileLayer = layer;
                }}
            }});
            
            L.DomEvent.on(buttonTheme, 'click', function() {{
                isLightTheme = !isLightTheme;
                
                // Remove current tile layer
                if (currentTileLayer) {{
                    map.removeLayer(currentTileLayer);
                }}
                
                if (isLightTheme) {{
                    // Switch to light matter theme
                    console.log("🌞 Switching to LIGHT MATTER theme...");
                    currentTileLayer = L.tileLayer('https://{{s}}.basemaps.cartocdn.com/light_all/{{z}}/{{x}}/{{y}}{{r}}.png', {{
                        attribution: '© CartoDB',
                        subdomains: 'abcd',
                        maxZoom: 19
                    }});
                    currentTileLayer.addTo(map);
                    buttonTheme.innerHTML = '☀️ Light Matter';
                    buttonTheme.style.background = '#f59e0b';
                }} else {{
                    // Switch to dark matter theme
                    console.log("🌙 Switching to DARK MATTER theme...");
                    currentTileLayer = L.tileLayer('https://{{s}}.basemaps.cartocdn.com/dark_all/{{z}}/{{x}}/{{y}}{{r}}.png', {{
                        attribution: '© CartoDB',
                        subdomains: 'abcd',
                        maxZoom: 19
                    }});
                    currentTileLayer.addTo(map);
                    buttonTheme.innerHTML = '🌙 Dark Matter';
                    buttonTheme.style.background = '#374151';
                }}
                
                // Trigger particle color update after theme change
                setTimeout(reloadParticlesWithTheme, 200);
                console.log("✅ Theme switched successfully!");
            }});
            
            // Add forecast controls if in forecast mode
            if (forecastMode && forecastData) {{
                console.log("📅 Adding forecast timeline controls...");
                
                // Create forecast control container at bottom of map
                var forecastControlDiv = L.DomUtil.create('div', 'forecast-controls');
                forecastControlDiv.style.position = 'absolute';
                forecastControlDiv.style.bottom = '10px';
                forecastControlDiv.style.left = '50%';
                forecastControlDiv.style.transform = 'translateX(-50%)';
                forecastControlDiv.style.zIndex = '1000';
                forecastControlDiv.style.background = 'rgba(0,0,0,0.8)';
                forecastControlDiv.style.padding = '10px 15px';
                forecastControlDiv.style.borderRadius = '25px';
                forecastControlDiv.style.boxShadow = '0 2px 10px rgba(0,0,0,0.3)';
                forecastControlDiv.style.fontFamily = 'Arial, sans-serif';
                forecastControlDiv.style.fontSize = '12px';
                forecastControlDiv.style.color = 'white';
                forecastControlDiv.style.display = 'flex';
                forecastControlDiv.style.alignItems = 'center';
                forecastControlDiv.style.gap = '10px';
                
                // Previous button
                var prevButton = L.DomUtil.create('button', 'forecast-prev', forecastControlDiv);
                prevButton.innerHTML = '⏮';
                prevButton.style.background = 'rgba(255,255,255,0.2)';
                prevButton.style.border = 'none';
                prevButton.style.borderRadius = '50%';
                prevButton.style.width = '30px';
                prevButton.style.height = '30px';
                prevButton.style.color = 'white';
                prevButton.style.cursor = 'pointer';
                prevButton.style.fontSize = '14px';
                
                // Forecast timeline
                var timelineContainer = L.DomUtil.create('div', 'forecast-timeline', forecastControlDiv);
                timelineContainer.style.display = 'flex';
                timelineContainer.style.gap = '5px';
                timelineContainer.style.alignItems = 'center';
                
                // Current hour display
                var hourDisplay = L.DomUtil.create('span', 'forecast-hour-display', timelineContainer);
                hourDisplay.id = 'forecast-hour-display';
                hourDisplay.innerHTML = currentForecastHour + 'h';
                hourDisplay.style.fontWeight = 'bold';
                hourDisplay.style.minWidth = '25px';
                hourDisplay.style.textAlign = 'center';
                
                // Timeline separator
                var separator = L.DomUtil.create('span', '', timelineContainer);
                separator.innerHTML = ' | ';
                separator.style.color = 'rgba(255,255,255,0.5)';
                
                // Hour buttons for each forecast step
                availableForecastHours.forEach(function(hour) {{
                    var hourButton = L.DomUtil.create('button', 'forecast-hour-btn', timelineContainer);
                    hourButton.innerHTML = hour + 'h';
                    hourButton.style.background = hour === currentForecastHour ? 'rgba(59,130,246,0.8)' : 'rgba(255,255,255,0.2)';
                    hourButton.style.border = 'none';
                    hourButton.style.borderRadius = '12px';
                    hourButton.style.padding = '4px 8px';
                    hourButton.style.color = 'white';
                    hourButton.style.cursor = 'pointer';
                    hourButton.style.fontSize = '10px';
                    hourButton.style.minWidth = '28px';
                    
                    L.DomEvent.on(hourButton, 'click', function() {{
                        // Update all hour buttons
                        var allHourButtons = timelineContainer.querySelectorAll('.forecast-hour-btn');
                        allHourButtons.forEach(function(btn) {{
                            btn.style.background = 'rgba(255,255,255,0.2)';
                        }});
                        hourButton.style.background = 'rgba(59,130,246,0.8)';
                        
                        // Switch to this forecast hour
                        switchToForecastHour(hour);
                    }});
                }});
                
                // Next button
                var nextButton = L.DomUtil.create('button', 'forecast-next', forecastControlDiv);
                nextButton.innerHTML = '⏭';
                nextButton.style.background = 'rgba(255,255,255,0.2)';
                nextButton.style.border = 'none';
                nextButton.style.borderRadius = '50%';
                nextButton.style.width = '30px';
                nextButton.style.height = '30px';
                nextButton.style.color = 'white';
                nextButton.style.cursor = 'pointer';
                nextButton.style.fontSize = '14px';
                
                // Navigation button event handlers
                L.DomEvent.on(prevButton, 'click', function() {{
                    var currentIndex = availableForecastHours.indexOf(currentForecastHour);
                    if (currentIndex > 0) {{
                        var prevHour = availableForecastHours[currentIndex - 1];
                        
                        // Update hour button highlights
                        var allHourButtons = timelineContainer.querySelectorAll('.forecast-hour-btn');
                        allHourButtons.forEach(function(btn, index) {{
                            btn.style.background = index === (currentIndex - 1) ? 'rgba(59,130,246,0.8)' : 'rgba(255,255,255,0.2)';
                        }});
                        
                        switchToForecastHour(prevHour);
                    }}
                }});
                
                L.DomEvent.on(nextButton, 'click', function() {{
                    var currentIndex = availableForecastHours.indexOf(currentForecastHour);
                    if (currentIndex < availableForecastHours.length - 1) {{
                        var nextHour = availableForecastHours[currentIndex + 1];
                        
                        // Update hour button highlights
                        var allHourButtons = timelineContainer.querySelectorAll('.forecast-hour-btn');
                        allHourButtons.forEach(function(btn, index) {{
                            btn.style.background = index === (currentIndex + 1) ? 'rgba(59,130,246,0.8)' : 'rgba(255,255,255,0.2)';
                        }});
                        
                        switchToForecastHour(nextHour);
                    }}
                }});
                
                // Add forecast controls to map
                map.getContainer().appendChild(forecastControlDiv);
                console.log("✅ Forecast timeline controls added!");
            }}
            
            // Add controls to map
            map.getContainer().appendChild(windControlDiv);
            console.log("✅ Toggle controls added to map!");
            console.log("✅ Theme toggle added to map!");
            
            // Force a map update to trigger particle rendering
            setTimeout(function() {{
                map.invalidateSize();
                console.log("Map size invalidated to trigger particles");
            }}, 1000);
            
        }} catch (error) {{
            console.error("Error creating velocity layer:", error);
        }}
        
    }}, 2000);
    </script>
    """
    m.get_root().html.add_child(Element(js_code))
    
    # Add layer control
    folium.LayerControl().add_to(m)
    
    return m._repr_html_()

# Global state to prevent duplicate processing
_processing_state = {"is_processing": False, "last_request": None}

def update_visualization(region, forecast_mode=False):
    """Update wind visualization for selected region and mode"""
    global _processing_state
    
    # Create unique request identifier
    request_id = f"{region}_{forecast_mode}"
    
    # Prevent duplicate processing
    if _processing_state["is_processing"] and _processing_state["last_request"] == request_id:
        print(f"⚠️ Skipping duplicate request: {request_id}")
        return "⏳ Processing previous request...", "⏳ Processing..."
    
    _processing_state["is_processing"] = True
    _processing_state["last_request"] = request_id
    
    try:
        mode_str = "forecast" if forecast_mode else "current"
        print(f"🔄 Creating {mode_str} wind visualization for {region}")
        
        map_html = create_wind_map(region, forecast_mode)
        
        if forecast_mode:
            success_msg = f"📅 Forecast visualization loaded for {region.replace('_', ' ').title()} (0h-24h)"
        else:
            success_msg = f"✅ Current wind data loaded for {region.replace('_', ' ').title()}"
        
        print(success_msg)
        return map_html, success_msg
    except Exception as e:
        error_msg = f"❌ Error: {str(e)}"
        print(error_msg)
        return f"<div style='padding: 20px; color: red;'>Error: {str(e)}</div>", error_msg
    finally:
        # Reset processing state
        _processing_state["is_processing"] = False

# Create Gradio interface
with gr.Blocks(title="Wind Particle Visualization") as app:
    
    gr.Markdown("""
    # 🌪️ ECMWF Wind Visualization with Forecast - v4.0 LIVE
    **Real ECMWF wind data with forecast timeline**
    
    🎛️ **TOP-RIGHT CORNER CONTROLS:**  
    - 🌪️ **10m Surface Winds** (blue particles)  
    - 🚁 **100m Altitude Winds** (red particles)  
    - 🌙 **Dark/Light Theme Toggle** (switches map & particle colors)
    
    📅 **FORECAST MODE:** Timeline controls at bottom for 0h-24h forecasts  
    ⚡ **FEATURES:** Real ECMWF data • Forecast timeline • Instant particle clearing  
    *Updated: August 15, 2025 - FORECAST VERSION*
    """)
    
    with gr.Row():
        with gr.Column(scale=1):
            region = gr.Radio(
                choices=["global", "north_america", "europe"],
                value="global",
                label="🗺️ Region"
            )
            
            forecast_toggle = gr.Checkbox(
                label="📅 Forecast Mode",
                value=False,
                info="Enable to see 0h-24h forecast timeline"
            )
            
            update_btn = gr.Button("🌪️ Update Visualization", variant="primary")
            
            status = gr.Textbox(
                label="Status", 
                lines=3,
                value="🔄 Loading ECMWF dual wind visualization v3.0...\n🎛️ Look for 3 buttons in top-right corner of map!\n⚡ All features: Theme toggle, particle clearing, dual winds"
            )
            
            gr.Markdown("""
            ### ✨ Features:
            - **Dual wind levels**: 10m (blue) and 100m (red) wind visualization
            - **Toggle controls**: Independent on/off buttons for each wind level
            - **Adaptive colors**: Lighter colors on dark theme, darker on light theme
            - **Dynamic tails**: Smaller tails and slower speed for low winds
            - **Theme switching**: Colors update instantly when changing themes
            
            ### 🌪️ Wind Levels:
            - **10m winds** (surface): Blue particles, standard speed
            - **100m winds** (altitude): Red particles, stronger/faster
            
            ### 🎯 Controls:
            - **Top-right corner**: Toggle buttons for wind layers
            - **Layer control**: Switch between dark/light map themes
            - **Wind displays**: Bottom corners show current wind data
            
            ### 🎯 Troubleshooting:
            - **Wait 2-3 seconds** for particles to appear
            - **Use toggle buttons** to enable/disable wind layers
            - **Check browser console** (F12) for error messages
            - Particles appear as **flowing lines** with theme-appropriate colors
            """)
        
        with gr.Column(scale=3):
            wind_map = gr.HTML(
                label="Wind Particle Animation",
                value="<div style='padding: 40px; text-align: center;'>🔄 Loading wind particle visualization...</div>"
            )
    
    # Event handlers
    update_btn.click(
        update_visualization,
        inputs=[region, forecast_toggle],
        outputs=[wind_map, status]
    )
    
    region.change(
        update_visualization,
        inputs=[region, forecast_toggle],
        outputs=[wind_map, status]
    )
    
    forecast_toggle.change(
        update_visualization,
        inputs=[region, forecast_toggle],
        outputs=[wind_map, status]
    )
    
    # Auto-load on startup
    app.load(
        lambda: update_visualization("global", False),
        outputs=[wind_map, status]
    )

if __name__ == "__main__":
    print("🚀 Starting ECMWF Wind Visualization with Forecast v4.0...")
    print("🌍 Real ECMWF wind data with forecast timeline (0h-24h)")
    print("📅 Forecast mode available with interactive timeline controls")
    print("🎛️ Features: Theme toggle, particle clearing, adaptive colors")
    print("⏰ Build timestamp: August 15, 2025 - FORCE REBUILD")
    print("========================================")
    
    app.launch(
        server_name="0.0.0.0",
        server_port=7860,
        share=False
    )