app.py

# app.py
from flask import Flask, send_from_directory, jsonify, request
import os

app = Flask(__name__)

# Updated simulation parameters with real-world masses (scaled down for simulation)
# Sun: 1.989 x 10^30 kg, Earth: 5.972 x 10^24 kg, Mars: 6.417 x 10^23 kg
# Scale factor: 1e-26 for manageable numbers
simulation_params = {
    "sun": {
        "mass": 1.989e4,  # Scaled mass (1.989 x 10^30 kg * 1e-26)
        "position": [0, 0, 0],
        "orbital_velocity": 0,  # Sun is stationary
    },
    "earth": {
        "mass": 5.972e-2,  # Scaled mass (5.972 x 10^24 kg * 1e-26)
        "position": [10, 0, 0],  # Approx 1 AU scaled down (149.6 million km -> 10 units)
        "orbital_velocity": 0.0298,  # 29.8 km/s scaled down
    },
    "mars": {
        "mass": 6.417e-3,  # Scaled mass (6.417 x 10^23 kg * 1e-26)
        "position": [15, 0, 0],  # Approx 1.52 AU scaled down (227.9 million km -> 15 units)
        "orbital_velocity": 0.0241,  # 24.1 km/s scaled down
    },
    "fluid_speed": 0.1,
    "fluid_friction": 0.9,  # Default friction factor
    "fluid_deflection": 0.1,  # Default deflection strength
}

# Serve the frontend
@app.route('/')
def serve_index():
    return send_from_directory('static', 'index.html')

# Serve static files (CSS, JS)
@app.route('/static/<path:path>')
def serve_static(path):
    return send_from_directory('static', path)

# API to get simulation parameters
@app.route('/api/params', methods=['GET'])
def get_params():
    return jsonify(simulation_params)

# API to update simulation parameters
@app.route('/api/params', methods=['POST'])
def update_params():
    global simulation_params
    data = request.get_json()
    simulation_params.update(data)
    return jsonify({"status": "success", "params": simulation_params})

if __name__ == '__main__':
    port = int(os.environ.get('PORT', 7860))  # Default port for Hugging Face Spaces
    app.run(host='0.0.0.0', port=port)