"""
Cartopy: Use Cartopy Features
=============================
"""
import pygeode as pyg, numpy as np, pylab as pyl
from cartopy import crs as ccrs
import cartopy
from cartopy.feature.nightshade import Nightshade
from datetime import datetime as dt

lat = pyg.gausslat(60)
lon = pyg.regularlon(120)

x = pyg.sin(2*np.pi * lon / 180.) * pyg.exp(-(lat - 30)**2 / (2*10**2))
y = pyg.sin(2*np.pi * lon / 180.) * pyg.exp(-(lat + 40)**2 / (2*10**2))

pyl.ioff()
prj_args = dict(central_longitude = 60)

map = dict(projection = 'NearsidePerspective', prj_args = prj_args)

cl = pyg.cldict(0.1, nozero=True)
ax = pyg.vcontour(x, map = map, mapdecor = False, **cl)

# Addd an ocean and a day/night mask 
ax.add_feature(cartopy.feature.OCEAN)
ax.add_feature(Nightshade(dt.utcnow()))
ax.setp(title = '')

pyl.ion()
ax.render(2)

# %%
#
# Once the plot has been rendered, there is a Cartopy :class:`cartopy.mpl.geoaxes.GeoAxes` one
# can call additional methods on.
#
# %%

ax.ax.tissot(facecolor='orange', alpha=0.8)