/**
 * Copyright 2019-2021 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.
 */
#include <memory>
#include <string>
#include "minddata/dataset/core/client.h"
#include "common/common.h"
#include "gtest/gtest.h"
#include "utils/log_adapter.h"
#include "securec.h"
#include "minddata/dataset/util/status.h"

namespace common = mindspore::common;
namespace de = mindspore::dataset;

using namespace mindspore::dataset;
using mindspore::LogStream;
using mindspore::ExceptionType::NoExceptionType;
using mindspore::MsLogLevel::ERROR;

class MindDataTestBatchOp : public UT::DatasetOpTesting {
 protected:
};

std::shared_ptr<de::BatchOp> Batch(int32_t batch_size = 1, bool drop = false) {
  Status rc;
  std::shared_ptr<de::BatchOp> op;
  rc = de::BatchOp::Builder(batch_size).SetDrop(drop).Build(&op);
  EXPECT_TRUE(rc.IsOk());
  return op;
}

std::shared_ptr<de::RepeatOp> Repeat(int repeat_cnt = 1) {
  de::RepeatOp::Builder builder(repeat_cnt);
  std::shared_ptr<de::RepeatOp> op;
  Status rc = builder.Build(&op);
  EXPECT_TRUE(rc.IsOk());
  return op;
}

std::shared_ptr<de::TFReaderOp> TFReader(std::string schema, int num_works = 8) {
  std::shared_ptr<de::TFReaderOp> so;
  de::TFReaderOp::Builder builder;
  builder.SetDatasetFilesList({schema}).SetNumWorkers(num_works);
  Status rc = builder.Build(&so);
  return so;
}

std::shared_ptr<de::ExecutionTree> Build(std::vector<std::shared_ptr<de::DatasetOp>> ops) {
  std::shared_ptr<de::ExecutionTree> tree = std::make_shared<de::ExecutionTree>();
  for (int i = 0; i < ops.size(); i++) {
    tree->AssociateNode(ops[i]);
    if (i > 0) {
      ops[i]->AddChild(ops[i - 1]);
    }
    if (i == ops.size() - 1) {
      tree->AssignRoot(ops[i]);
    }
  }
  return tree;
}

TEST_F(MindDataTestBatchOp, TestSimpleBatch) {
  std::string schema_file = datasets_root_path_ + "/testBatchDataset/test.data";
  bool success = false;
  const std::shared_ptr<de::BatchOp> &op = Batch(12);
  EXPECT_EQ(op->Name(), "BatchOp");

  auto tree = Build({TFReader(schema_file), op});
  tree->Prepare();
  Status rc = tree->Launch();
  if (rc.IsError()) {
    MS_LOG(ERROR) << "Return code error detected during tree launch: " << rc.ToString() << ".";
  } else {
    int64_t payload[] = {-9223372036854775807 - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9223372036854775807};
    de::DatasetIterator di(tree);
    TensorMap tensor_map;
    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    std::shared_ptr<de::Tensor> t;
    rc = de::Tensor::CreateFromMemory(de::TensorShape({12, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)payload, &t);
    EXPECT_TRUE(rc.IsOk());
    // verify the actual data in Tensor is correct
    EXPECT_EQ(*t == *tensor_map["col_sint64"], true);
    // change what's in Tensor and verify this time the data is incorrect1;
    EXPECT_EQ(*t == *tensor_map["col_sint16"], false);
    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    if (tensor_map.size() == 0) {
      success = true;
    }
  }
  EXPECT_EQ(success, true);
}

TEST_F(MindDataTestBatchOp, TestRepeatBatchDropTrue) {
  std::string schema_file = datasets_root_path_ + "/testBatchDataset/test.data";
  bool success = false;
  auto op1 = TFReader(schema_file);
  auto op2 = Repeat(2);
  auto op3 = Batch(7, true);
  op1->set_total_repeats(2);
  op1->set_num_repeats_per_epoch(2);
  auto tree = Build({op1, op2, op3});
  tree->Prepare();
  Status rc = tree->Launch();
  if (rc.IsError()) {
    MS_LOG(ERROR) << "Return code error detected during tree launch: " << rc.ToString() << ".";
  } else {
    int64_t payload[] = {-9223372036854775807 - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9223372036854775807,
                         -9223372036854775807 - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9223372036854775807};
    de::DatasetIterator di(tree);
    std::shared_ptr<de::Tensor> t1, t2, t3;
    rc = de::Tensor::CreateFromMemory(de::TensorShape({7, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)payload, &t1);
    EXPECT_TRUE(rc.IsOk());
    rc = de::Tensor::CreateFromMemory(de::TensorShape({7, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)(payload + 7), &t2);
    EXPECT_TRUE(rc.IsOk());
    rc = de::Tensor::CreateFromMemory(de::TensorShape({7, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)(payload + 2), &t3);
    EXPECT_TRUE(rc.IsOk());

    TensorMap tensor_map;
    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t1 == *(tensor_map["col_sint64"]), true);  // first call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t2 == *(tensor_map["col_sint64"]), true);  // second call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t3 == *(tensor_map["col_sint64"]), true);  // third call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    if (tensor_map.size() == 0) {
      success = true;
    }
  }
  EXPECT_EQ(success, true);
}

TEST_F(MindDataTestBatchOp, TestRepeatBatchDropFalse) {
  std::string schema_file = datasets_root_path_ + "/testBatchDataset/test.data";
  bool success = false;
  auto op1 = TFReader(schema_file);
  auto op2 = Repeat(2);
  auto op3 = Batch(7, false);
  op1->set_total_repeats(2);
  op1->set_num_repeats_per_epoch(2);
  auto tree = Build({op1, op2, op3});
  tree->Prepare();
  Status rc = tree->Launch();
  if (rc.IsError()) {
    MS_LOG(ERROR) << "Return code error detected during tree launch: " << rc.ToString() << ".";
  } else {
    int64_t payload[] = {-9223372036854775807 - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9223372036854775807,
                         -9223372036854775807 - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9223372036854775807};
    de::DatasetIterator di(tree);
    std::shared_ptr<de::Tensor> t1, t2, t3, t4;
    rc = de::Tensor::CreateFromMemory(de::TensorShape({7, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)payload, &t1);
    EXPECT_TRUE(rc.IsOk());
    rc = de::Tensor::CreateFromMemory(de::TensorShape({7, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)(payload + 7), &t2);
    EXPECT_TRUE(rc.IsOk());
    rc = de::Tensor::CreateFromMemory(de::TensorShape({7, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)(payload + 2), &t3);
    EXPECT_TRUE(rc.IsOk());
    rc = de::Tensor::CreateFromMemory(de::TensorShape({3, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)(payload + 9), &t4);
    EXPECT_TRUE(rc.IsOk());

    TensorMap tensor_map;
    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t1 == *(tensor_map["col_sint64"]), true);  // first call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t2 == *(tensor_map["col_sint64"]), true);  // second call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t3 == *(tensor_map["col_sint64"]), true);  // third call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t4 == *(tensor_map["col_sint64"]), true);  // last call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    if (tensor_map.size() == 0) {
      success = true;
    }
  }
  EXPECT_EQ(success, true);
}

TEST_F(MindDataTestBatchOp, TestBatchDropFalseRepeat) {
  std::string schema_file = datasets_root_path_ + "/testBatchDataset/test.data";
  bool success = false;
  auto op1 = TFReader(schema_file);
  auto op2 = Batch(7, false);
  auto op3 = Repeat(2);
  op1->set_total_repeats(2);
  op1->set_num_repeats_per_epoch(2);
  op2->set_total_repeats(2);
  op2->set_num_repeats_per_epoch(2);
  auto tree = Build({op1, op2, op3});
  tree->Prepare();
  Status rc = tree->Launch();
  if (rc.IsError()) {
    MS_LOG(ERROR) << "Return code error detected during tree launch: " << rc.ToString() << ".";
  } else {
    int64_t payload[] = {-9223372036854775807 - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9223372036854775807,
                         -9223372036854775807 - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9223372036854775807};
    de::DatasetIterator di(tree);
    std::shared_ptr<de::Tensor> t1, t2;
    rc = de::Tensor::CreateFromMemory(de::TensorShape({7, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)payload, &t1);
    EXPECT_TRUE(rc.IsOk());
    rc = de::Tensor::CreateFromMemory(de::TensorShape({5, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)(payload + 7), &t2);
    EXPECT_TRUE(rc.IsOk());

    TensorMap tensor_map;
    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t1 == *(tensor_map["col_sint64"]), true);  // first call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t2 == *(tensor_map["col_sint64"]), true);  // second call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t1 == *(tensor_map["col_sint64"]), true);  // third call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t2 == *(tensor_map["col_sint64"]), true);  // last call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    if (tensor_map.size() == 0) {
      success = true;
    }
  }
  EXPECT_EQ(success, true);
}

TEST_F(MindDataTestBatchOp, TestBatchDropTrueRepeat) {
  std::string schema_file = datasets_root_path_ + "/testBatchDataset/test.data";
  bool success = false;
  auto op1 = TFReader(schema_file);
  auto op2 = Batch(5, true);
  auto op3 = Repeat(2);
  op1->set_total_repeats(2);
  op1->set_num_repeats_per_epoch(2);
  op2->set_total_repeats(2);
  op2->set_num_repeats_per_epoch(2);
  auto tree = Build({op1, op2, op3});
  tree->Prepare();
  Status rc = tree->Launch();
  if (rc.IsError()) {
    MS_LOG(ERROR) << "Return code error detected during tree launch: " << rc.ToString() << ".";
  } else {
    int64_t payload[] = {-9223372036854775807 - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9223372036854775807,
                         -9223372036854775807 - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9223372036854775807};
    de::DatasetIterator di(tree);
    std::shared_ptr<de::Tensor> t1, t2;
    rc = de::Tensor::CreateFromMemory(de::TensorShape({5, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)payload, &t1);
    EXPECT_TRUE(rc.IsOk());
    rc = de::Tensor::CreateFromMemory(de::TensorShape({5, 1}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)(payload + 5), &t2);
    EXPECT_TRUE(rc.IsOk());

    TensorMap tensor_map;
    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t1 == *(tensor_map["col_sint64"]), true);  // first call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t2 == *(tensor_map["col_sint64"]), true);  // second call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t1 == *(tensor_map["col_sint64"]), true);  // third call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    EXPECT_EQ(*t2 == *(tensor_map["col_sint64"]), true);  // last call to getNext()

    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(rc.IsOk());
    if (tensor_map.size() == 0) {
      success = true;
    }
  }
  EXPECT_EQ(success, true);
}

TEST_F(MindDataTestBatchOp, TestSimpleBatchPadding) {
  std::string schema_file = datasets_root_path_ + "/testBatchDataset/test.data";
  std::shared_ptr<BatchOp> op;
  PadInfo m;
  std::shared_ptr<Tensor> pad_value;
  Tensor::CreateEmpty(TensorShape::CreateScalar(), DataType(DataType::DE_FLOAT32), &pad_value);
  pad_value->SetItemAt<float>({}, -1);
  m.insert({"col_1d", std::make_pair(TensorShape({4}), pad_value)});
  de::BatchOp::Builder(12).SetDrop(false).SetPaddingMap(m, true).Build(&op);
  auto tree = Build({TFReader(schema_file), op});
  tree->Prepare();
  Status rc = tree->Launch();
  if (rc.IsError()) {
    MS_LOG(ERROR) << "Return code error detected during tree launch: " << rc.ToString() << ".";
  } else {
    int64_t payload[] = {-9223372036854775807 - 1,
                         1,
                         -1,
                         -1,
                         2,
                         3,
                         -1,
                         -1,
                         4,
                         5,
                         -1,
                         -1,
                         6,
                         7,
                         -1,
                         -1,
                         8,
                         9,
                         -1,
                         -1,
                         10,
                         11,
                         -1,
                         -1,
                         12,
                         13,
                         -1,
                         -1,
                         14,
                         15,
                         -1,
                         -1,
                         16,
                         17,
                         -1,
                         -1,
                         18,
                         19,
                         -1,
                         -1,
                         20,
                         21,
                         -1,
                         -1,
                         22,
                         23,
                         -1,
                         -1};
    std::shared_ptr<de::Tensor> t;
    rc = de::Tensor::CreateFromMemory(de::TensorShape({12, 4}), de::DataType(DataType::DE_INT64),
                                      (unsigned char *)payload, &t);
    de::DatasetIterator di(tree);
    TensorMap tensor_map;
    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE((*t) == (*(tensor_map["col_1d"])));
    rc = di.GetNextAsMap(&tensor_map);
    EXPECT_TRUE(tensor_map.size() == 0);
    EXPECT_TRUE(rc.IsOk());
  }
}