# Copyright (c) 2022 PaddlePaddle Authors. 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

from collections import defaultdict

# _g_default_config[category][field] = default_value
_g_default_config = defaultdict(dict)


def get_category_default_config(category):
    return _g_default_config[category]


def set_category_default_config(category, default_value):
    _g_default_config[category] = default_value


def get_field_default_config(category, field):
    return _g_default_config[category][field]


def set_field_default_config(category, field, default_value):
    _g_default_config[category][field] = default_value


NOT_FOUND = "not_found"

#########################################
# base configuration
#########################################
BASE = "base"
set_field_default_config(BASE, "auto_mode", "semi")
set_field_default_config(BASE, "gradient_scale", True)
set_field_default_config(BASE, "use_cache", True)
set_field_default_config(BASE, "return_numpy", True)
set_field_default_config(BASE, "all_ranks", False)
set_field_default_config(BASE, "split_data", True)
set_field_default_config(BASE, "seed", None)
set_field_default_config(BASE, "reinit", False)  # Only for debug

#########################################
# recompute configuration
#########################################
RECOMPUTE = "recompute"
set_field_default_config(RECOMPUTE, "enable", False)
set_field_default_config(RECOMPUTE, "checkpoints", None)
set_field_default_config(RECOMPUTE, "enable_tuning", False)

#########################################
# AMP configuration
#########################################
AMP = "amp"
set_field_default_config(AMP, "enable", False)
set_field_default_config(AMP, "dtype", "float16")
set_field_default_config(AMP, "level", "o1")
set_field_default_config(AMP, "init_loss_scaling", 32768.0)
set_field_default_config(AMP, "incr_every_n_steps", 1000)
set_field_default_config(AMP, "decr_every_n_nan_or_inf", 2)
set_field_default_config(AMP, "incr_ratio", 2.0)
set_field_default_config(AMP, "decr_ratio", 0.8)
set_field_default_config(AMP, "use_dynamic_loss_scaling", True)
set_field_default_config(AMP, "custom_white_list", [])
set_field_default_config(AMP, "custom_black_list", [])
set_field_default_config(AMP, "custom_black_varnames", [])
set_field_default_config(AMP, "use_fp16_guard", False)
set_field_default_config(AMP, "use_bf16_guard", False)
set_field_default_config(AMP, "use_optimizer_fp16", False)

#########################################
# sharding configuration
#########################################
SHARDING = "sharding"
set_field_default_config(SHARDING, "enable", False)
set_field_default_config(SHARDING, "stage", 1)
set_field_default_config(SHARDING, "degree", 8)
set_field_default_config(SHARDING, "segment_broadcast_MB", 32.0)
set_field_default_config(SHARDING, "enable_tuning", False)
set_field_default_config(SHARDING, "tuning_range", [])

#########################################
# gradient merge configuration
#########################################
GRADIENT_MERGE = "gradient_merge"
set_field_default_config(GRADIENT_MERGE, "enable", False)
set_field_default_config(GRADIENT_MERGE, "k_steps", 1)
set_field_default_config(GRADIENT_MERGE, "avg", True)

#########################################
# pipeline configuration
#########################################
PIPELINE = "pipeline"
set_field_default_config(PIPELINE, "enable", False)
set_field_default_config(PIPELINE, "schedule_mode", "1F1B")
set_field_default_config(PIPELINE, "micro_batch_size", 1)
set_field_default_config(PIPELINE, "accumulate_steps", 1)
set_field_default_config(PIPELINE, "generation_batch_size", 1)

#########################################
# quantization configuration
#########################################
QAT = "qat"
set_field_default_config(QAT, "enable", False)
set_field_default_config(QAT, "channel_wise_abs_max", True)
set_field_default_config(QAT, "weight_bits", 8)
set_field_default_config(QAT, "activation_bits", 8)
set_field_default_config(QAT, "not_quant_pattern", ['skip_quant'])
set_field_default_config(QAT, "algo", None)

#########################################
# auto tuning configuration
#########################################
TUNING = "tuning"
set_field_default_config(TUNING, "enable", False)
set_field_default_config(TUNING, "batch_size", 1)
set_field_default_config(TUNING, "dataset", None)
set_field_default_config(TUNING, "profile_start_step", 1)
set_field_default_config(TUNING, "profile_end_step", 1)
set_field_default_config(TUNING, "run_after_tuning", True)
set_field_default_config(TUNING, "verbose", True)

#########################################
# dataset configuration
#########################################
DATASET = "dataset"
set_field_default_config(DATASET, "enable", False)
set_field_default_config(DATASET, "num_shards", 1)

#########################################
# data parallel configuration
#########################################
DP_OPTIMIZATION = "dp_optimization"
set_field_default_config(DP_OPTIMIZATION, "enable", False)
set_field_default_config(DP_OPTIMIZATION, "fuse_all_reduce_ops", True)
set_field_default_config(DP_OPTIMIZATION, "fuse_grad_size_in_MB", 32)
set_field_default_config(DP_OPTIMIZATION, "overlap_comm_cacl", True)