from IPython.html.widgets import interact, interactive, fixed
from IPython.display import display, HTML 
import requests
from mpl_toolkits.mplot3d import Axes3D
import datetime
import numpy as np

planets = ['mars','earth','venus','mercury','sun']
planets = ','.join(planets)
now = datetime.datetime.now()
year,month,day = now.year, now.month, now.day


def get_eph(year,month,day):
    url = "http://www.astro-phys.com/api/de406/states?date=%s-%s-%s&bodies=%s" % (year,month,day, planets)
    data = requests.get(url).json()
    data = data['results']
    return data

def distances(data):
    dists = {}
    for planet in data:
        dists[planet] = int(np.linalg.norm(np.array(data["earth"]) - np.array(data[planet]), 2))
    return dists


def system(year, month, day):
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    thisdate = str(datetime.date(year, month, day))
    ax.set_title(thisdate)
    data = get_eph(year, month, day)
    table = '<h3>Distances from Earth on {0}:</h3><table>\n'.format(thisdate)
    dists = distances(data)
    for planet in sorted(data):
        x,y,z = data[planet][0]
        ax.scatter(x, y, z)
        ax.text(x,y,z, planet)
        if planet != "earth":
            table += '<tr><td>{0}</td><td>{1} km</td></tr>\n'.format(planet, dists[planet])
    display(HTML(table))

w = interactive(system, year=(1980,2020,1), month=(1,12,1), day=(1,30,1))
display(w)