# python3
# 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.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============================================================================
"""Simple diagnostic bandit_scale challenge.

Observation is a single pixel of 0 - this is an indep arm bandit problem!
Rewards are np.linspace(0, 1, 11) with no noise, but rescaled.
"""

from bsuite.environments import bandit
from bsuite.experiments.bandit import sweep
from bsuite.utils import wrappers


def load(reward_scale, seed, mapping_seed):
  """Load a bandit_scale experiment with the prescribed settings."""
  env = wrappers.RewardScale(
      env=bandit.SimpleBandit(mapping_seed=mapping_seed),
      reward_scale=reward_scale,
      seed=seed)
  env.bsuite_num_episodes = sweep.NUM_EPISODES
  return env
