# pylint: disable=g-bad-file-header
# Copyright 2019 DeepMind Technologies Limited. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or  implied.
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# ============================================================================
"""Simple diagnostic credit assigment challenge.

Observation is 3 + n_distractor pixels:
  (need_umbrella, have_umbrella, time_to_live, n x distractors)

Only the first action takes any effect (pick up umbrella or not).
All other actions take no effect and the reward is +1, -1 on the final step.
Distractor states are always Bernoulli sampled  iid each step.
"""

from bsuite.environments import umbrella_chain

load = umbrella_chain.UmbrellaChain
