import ee

from ee_plugin import Map
from ee_plugin.contrib import utils, palettes

dem = ee.Image("AHN/AHN2_05M_RUW") \
  .resample('bicubic') \
  .focal_max(0.5, 'circle', 'meters') \
  .convolve(ee.Kernel.gaussian(0.5, 0.25, 'meters'))

# See https://github.com/gee-community/ee-palettes 
# for the full list of supported color palettes
# palette = palettes.crameri['lisbon'][50]
palette = palettes.crameri['oleron'][50]
# palette = palettes.crameri['roma'][50][::-1] # reversed
# palette = palettes.crameri['batlow'][50]

demRGB = dem.visualize(**{ 'min': -5, 'max': 5, 'palette': palette })
Map.addLayer(demRGB , {}, 'DEM (RGB)', True)

weight = 0.5 # hillshade vs RGB intensity (0 - flat, 1 - HS)
exaggeration = 3 # vertical exaggeration
azimuth = 300 # Sun azimuth
zenith = 25 # Sun elevation
brightness = -0.05 # 0 - default
contrast = 0.05 # 0 - default
saturation = 0.8 # 1 - default
castShadows = False

# no shadows
rgb = utils.hillshadeRGB(demRGB, dem, weight, exaggeration,
    azimuth, zenith, contrast, brightness, saturation, castShadows)
Map.addLayer(rgb, {}, 'DEM (hillshade)', False)

# with shadows
castShadows = True
rgb = utils.hillshadeRGB(demRGB, dem, weight, exaggeration, 
    azimuth, zenith, contrast, brightness, saturation, castShadows)
Map.addLayer(rgb, {}, 'DEM (hillshade, shadows)', False)

Map.setCenter(4.407, 52.177, 18)