# Copyright 2020-2021 Huawei Technologies Co., Ltd
#
# 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.
# ============================================================================
import os
import json
import sys
import tempfile
import time
import shutil
import glob

import numpy as np
import pytest
import mindspore.context as context
import mindspore.nn as nn
from mindspore import Tensor
from mindspore.ops import operations as P
from mindspore.nn import Cell
from mindspore.nn import Dense
from mindspore.nn import SoftmaxCrossEntropyWithLogits
from mindspore.nn import Momentum
from mindspore.nn import TrainOneStepCell
from mindspore.nn import WithLossCell


class Net(nn.Cell):
    def __init__(self):
        super(Net, self).__init__()
        self.add = P.Add()

    def construct(self, x_, y_):
        return self.add(x_, y_)


x = np.array([[1, 2, 3], [4, 5, 6]]).astype(np.float32)
y = np.array([[7, 8, 9], [10, 11, 12]]).astype(np.float32)


def change_current_dump_json(file_name, dump_path, dump_config_path):
    with open(file_name, 'r+') as f:
        data = json.load(f)
    data["common_dump_settings"]["path"] = dump_path
    with open(dump_config_path, 'w') as f:
        json.dump(data, f)


@pytest.mark.level1
@pytest.mark.platform_arm_ascend_training
@pytest.mark.platform_x86_ascend_training
@pytest.mark.env_onecard
def test_async_dump():
    context.set_context(mode=context.GRAPH_MODE, device_target="Ascend")
    pwd = os.getcwd()
    with tempfile.TemporaryDirectory(dir=pwd) as tmp_dir:
        dump_path = os.path.join(tmp_dir, 'async_dump')
        dump_config_path = os.path.join(tmp_dir, 'async_dump.json')
        change_current_dump_json('async_dump.json', dump_path, dump_config_path)
        os.environ['MINDSPORE_DUMP_CONFIG'] = dump_config_path
        dump_file_path = os.path.join(dump_path, 'rank_0', 'Net', '0', '0')
        if os.path.isdir(dump_path):
            shutil.rmtree(dump_path)
        add = Net()
        add(Tensor(x), Tensor(y))
        time.sleep(5)
        assert len(os.listdir(dump_file_path)) == 1


def run_e2e_dump():
    if sys.platform != 'linux':
        return
    pwd = os.getcwd()
    with tempfile.TemporaryDirectory(dir=pwd) as tmp_dir:
        dump_path = os.path.join(tmp_dir, 'e2e_dump')
        dump_config_path = os.path.join(tmp_dir, 'e2e_dump.json')
        change_current_dump_json('e2e_dump.json', dump_path, dump_config_path)
        os.environ['MINDSPORE_DUMP_CONFIG'] = dump_config_path
        dump_file_path = os.path.join(dump_path, 'rank_0', 'Net', '0', '0')
        if os.path.isdir(dump_path):
            shutil.rmtree(dump_path)
        add = Net()
        add(Tensor(x), Tensor(y))
        if context.get_context("device_target") == "Ascend":
            assert len(os.listdir(dump_file_path)) == 5
            output_name = "Add.Add-op1.0.0.*.output.0.DefaultFormat.npy"
        elif context.get_context("device_target") == "CPU":
            assert len(os.listdir(dump_file_path)) == 5
            output_name = "Add.Add-op3.0.0.*.output.0.DefaultFormat.npy"
        else:
            assert len(os.listdir(dump_file_path)) == 3
            output_name = "Add.Add-op3.0.0.*.output.0.DefaultFormat.npy"
        output_path = glob.glob(os.path.join(dump_file_path, output_name))[0]
        real_path = os.path.realpath(output_path)
        output = np.load(real_path)
        expect = np.array([[8, 10, 12], [14, 16, 18]], np.float32)
        assert output.dtype == expect.dtype
        assert np.array_equal(output, expect)


@pytest.mark.level0
@pytest.mark.platform_arm_ascend_training
@pytest.mark.platform_x86_ascend_training
@pytest.mark.env_onecard
def test_e2e_dump():
    context.set_context(mode=context.GRAPH_MODE, device_target="Ascend")
    run_e2e_dump()


@pytest.mark.level0
@pytest.mark.platform_arm_ascend_training
@pytest.mark.platform_x86_ascend_training
@pytest.mark.env_onecard
def test_e2e_dump_with_hccl_env():
    context.set_context(mode=context.GRAPH_MODE, device_target="Ascend")
    os.environ["RANK_TABLE_FILE"] = "invalid_file.json"
    os.environ["RANK_ID"] = "4"
    run_e2e_dump()


@pytest.mark.level0
@pytest.mark.platform_x86_cpu
@pytest.mark.env_onecard
def test_cpu_e2e_dump():
    context.set_context(mode=context.GRAPH_MODE, device_target="CPU")
    run_e2e_dump()


@pytest.mark.level0
@pytest.mark.platform_x86_cpu
@pytest.mark.env_onecard
def test_cpu_e2e_dump_with_hccl_set():
    context.set_context(mode=context.GRAPH_MODE, device_target="CPU")
    os.environ["RANK_TABLE_FILE"] = "invalid_file.json"
    os.environ["RANK_ID"] = "4"
    run_e2e_dump()


@pytest.mark.level0
@pytest.mark.platform_x86_gpu_training
@pytest.mark.env_onecard
def test_gpu_e2e_dump():
    context.set_context(mode=context.GRAPH_MODE, device_target="GPU")
    run_e2e_dump()


@pytest.mark.level0
@pytest.mark.platform_x86_gpu_training
@pytest.mark.env_onecard
def test_gpu_e2e_dump_with_hccl_set():
    context.set_context(mode=context.GRAPH_MODE, device_target="GPU")
    os.environ["RANK_TABLE_FILE"] = "invalid_file.json"
    os.environ["RANK_ID"] = "4"
    run_e2e_dump()


class ReluReduceMeanDenseRelu(Cell):
    def __init__(self, kernel, bias, in_channel, num_class):
        super().__init__()
        self.relu = P.ReLU()
        self.mean = P.ReduceMean(keep_dims=False)
        self.dense = Dense(in_channel, num_class, kernel, bias)

    def construct(self, x_):
        x_ = self.relu(x_)
        x_ = self.mean(x_, (2, 3))
        x_ = self.dense(x_)
        x_ = self.relu(x_)
        return x_


def search_path(path, keyword):
    content = os.listdir(path)
    for each in content:
        each_path = path + os.sep + each
        if keyword in each:
            return each_path
        read_write = os.access(each_path, os.W_OK) and os.access(each_path, os.R_OK)
        if not read_write:
            continue
        if os.path.isdir(each_path):
            search_path(each_path, keyword)
    return None


@pytest.mark.level0
@pytest.mark.platform_arm_ascend_training
@pytest.mark.platform_x86_ascend_training
@pytest.mark.env_onecard
def test_async_dump_net_multi_layer_mode1():
    context.set_context(mode=context.GRAPH_MODE, device_target="Ascend")
    test_name = "test_async_dump_net_multi_layer_mode1"
    json_file = os.path.join(os.getcwd(), "{}.json".format(test_name))
    rank_id = 0
    dump_full_path = os.path.join("/tmp/async_dump/", "{}_{}".format(test_name, rank_id))
    os.system("rm -rf {}/*".format(dump_full_path))
    os.environ["MINDSPORE_DUMP_CONFIG"] = json_file
    weight = Tensor(np.ones((1000, 2048)).astype(np.float32))
    bias = Tensor(np.ones((1000,)).astype(np.float32))
    net = ReluReduceMeanDenseRelu(weight, bias, 2048, 1000)
    criterion = SoftmaxCrossEntropyWithLogits(sparse=False)
    optimizer = Momentum(learning_rate=0.1, momentum=0.1,
                         params=filter(lambda x: x.requires_grad, net.get_parameters()))
    net_with_criterion = WithLossCell(net, criterion)
    train_network = TrainOneStepCell(net_with_criterion, optimizer)
    train_network.set_train()
    inputs = Tensor(np.random.randn(32, 2048, 7, 7).astype(np.float32))
    label = Tensor(np.zeros(shape=(32, 1000)).astype(np.float32))
    net_dict = train_network(inputs, label)

    dump_path = "/tmp/async_dump/{}/rank_{}/test/0/0/".format(test_name, rank_id)
    dump_file = os.listdir(dump_path)
    dump_file_name = ""
    for file in dump_file:
        if "SoftmaxCrossEntropyWithLogits" in file:
            dump_file_name = file
    dump_file_full_path = os.path.join(dump_path, dump_file_name)
    npy_path = os.path.join(os.getcwd(), "./{}".format(test_name))
    if os.path.exists(npy_path):
        shutil.rmtree(npy_path)
    os.mkdir(npy_path)
    tool_path = search_path('/usr/local/Ascend', 'msaccucmp.pyc')
    if tool_path:
        cmd = "python {0} convert -d {1} -out {2}".format(tool_path, dump_file_full_path, npy_path)
        os.system(cmd)
        npy_file_list = os.listdir(npy_path)
        dump_result = {}
        for file in npy_file_list:
            if "output.0.npy" in file:
                dump_result["output0"] = np.load(os.path.join(npy_path, file))
        for index, value in enumerate(net_dict):
            assert value.asnumpy() == dump_result["output0"][index]
    else:
        print('not find convert tools msaccucmp.pyc')


@pytest.mark.level0
@pytest.mark.platform_arm_ascend_training
@pytest.mark.platform_x86_ascend_training
@pytest.mark.env_onecard
def test_dump_with_diagnostic_path():
    """
    Test e2e dump when path is not set (set to empty) in dump json file and MS_DIAGNOSTIC_DATA_PATH is set.
    Data is expected to be dumped into MS_DIAGNOSTIC_DATA_PATH/debug_dump.
    """
    context.set_context(mode=context.GRAPH_MODE, device_target="Ascend")
    pwd = os.getcwd()
    with tempfile.TemporaryDirectory(dir=pwd) as tmp_dir:
        dump_config_path = os.path.join(tmp_dir, 'e2e_dump.json')
        change_current_dump_json('e2e_dump.json', '', dump_config_path)
        os.environ['MINDSPORE_DUMP_CONFIG'] = dump_config_path
        diagnose_path = os.path.join(tmp_dir, 'e2e_dump')
        os.environ['MS_DIAGNOSTIC_DATA_PATH'] = diagnose_path
        dump_file_path = os.path.join(diagnose_path, 'debug_dump', 'rank_0', 'Net', '0', '0')
        if os.path.isdir(diagnose_path):
            shutil.rmtree(diagnose_path)
        add = Net()
        add(Tensor(x), Tensor(y))
        assert len(os.listdir(dump_file_path)) == 5