# -*- coding: utf-8 -*-
# MegEngine is Licensed under the Apache License, Version 2.0 (the "License")
#
# Copyright (c) 2014-2021 Megvii Inc. All rights reserved.
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT ARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

import logging
from ctypes import *
from enum import Enum, IntEnum


class LiteBackend(IntEnum):
    LITE_DEFAULT = 0


class LiteDeviceType(IntEnum):
    LITE_CPU = 0
    LITE_CUDA = 1
    LITE_ATLAS = 3
    LITE_NPU = 4
    LITE_DEVICE_DEFAULT = 5


class LiteDataType(IntEnum):
    LITE_FLOAT = 0
    LITE_HALF = 1
    LITE_INT = 2
    LITE_INT16 = 3
    LITE_INT8 = 4
    LITE_UINT8 = 5


class LiteTensorPhase(IntEnum):
    LITE_IO = 0
    LITE_INPUT = 1
    LITE_OUTPUT = 2


class LiteIOType(IntEnum):
    """
    the input and output type, include SHAPE and VALUE
    sometimes user only need the shape of the output tensor
    """

    LITE_IO_VALUE = 0
    LITE_IO_SHAPE = 1


class LiteAlgoSelectStrategy(IntEnum):
    """
    operation algorithm seletion strategy type, some operations have
    multi algorithms, different algorithm has different attribute, according to
    the strategy, the best algorithm will be selected.

    Note: These strategies can be combined

    LITE_ALGO_HEURISTIC | LITE_ALGO_PROFILE means: if profile cache not valid,
    use heuristic instead

    LITE_ALGO_HEURISTIC | LITE_ALGO_REPRODUCIBLE means: heuristic choice the
    reproducible algo

    LITE_ALGO_PROFILE | LITE_ALGO_REPRODUCIBLE means: profile the best
    algorithm from the reproducible algorithms set

    LITE_ALGO_PROFILE | LITE_ALGO_OPTIMIZED means: profile the best
    algorithm form the optimzed algorithms, thus profile will process fast

    LITE_ALGO_PROFILE | LITE_ALGO_OPTIMIZED | LITE_ALGO_REPRODUCIBLE means:
    profile the best algorithm form the optimzed and reproducible algorithms
    """

    LITE_ALGO_HEURISTIC = 1
    LITE_ALGO_PROFILE = 2
    LITE_ALGO_REPRODUCIBLE = 4
    LITE_ALGO_OPTIMIZED = 8


class LiteLogLevel(IntEnum):
    """
    DEBUG: The most verbose level, printing debugging info
    INFO: The default level
    WARN: Printing warnings
    ERROR: The least verbose level, printing errors only
    """

    DEBUG = 0
    INFO = 1
    WARN = 2
    ERROR = 3