#!/usr/bin/env python
# coding: utf-8

# # Pydeck + Earth Engine: Polygon FeatureCollection
# 
# This is an example of using [pydeck](https://pydeck.gl) to visualize a Google Earth Engine `FeatureCollection` of polygons.
# To install and run this notebook locally, refer to the [Pydeck Earth Engine documentation](https://earthengine-layers.com/docs/developer-guide/pydeck-integration).
# 
# To see this example online, view the [JavaScript version][js-example].
# 
# [js-example]: https://earthengine-layers.com/examples/intl-boundary

# Import required packages:

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from pydeck_earthengine_layers import EarthEngineLayer
import pydeck as pdk
import ee


# ### Authenticate with Earth Engine
# 
# Using Earth Engine requires authentication. If you don't have a Google account approved for use with Earth Engine, you'll need to request access. For more information and to sign up, go to https://signup.earthengine.google.com/.

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try:
    ee.Initialize()
except Exception as e:
    ee.Authenticate()
    ee.Initialize()


# ### International Boundaries dataset
# 
# This example uses the [Large Scale International Boundary Polygons][lsib] dataset, which contains simplified boundaries of countries.
# 
# [lsib]: https://developers.google.com/earth-engine/datasets/catalog/USDOS_LSIB_SIMPLE_2017

# Import the dataset by creating an Earth Engine object that references it.

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dataset = ee.FeatureCollection('USDOS/LSIB_SIMPLE/2017')


# Apply Earth Engine styling on this dataset. Here we render the fill of the polygon with a shade of green, and the border color with a shade of blue.

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countries = dataset.style(
    fillColor='b5ffb4',
    color='00909F',
    width=3
)


# Create a new `EarthEngineLayer` with this dataset that can then be passed to Pydeck.

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layer = EarthEngineLayer(countries, id="international_boundaries")


# Then just pass this layer to a `pydeck.Deck` instance, and call `.show()` to create a map:

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view_state = pdk.ViewState(latitude=36, longitude=10, zoom=3)
r = pdk.Deck(
    layers=[layer], 
    initial_view_state=view_state
)
r.show()


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