/* Copyright (c) 2016 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. */

#include "paddle/fluid/operators/benchmark/op_tester_config.h"
#include <fstream>
#include "glog/logging.h"
#include "paddle/fluid/platform/enforce.h"

namespace paddle {
namespace operators {
namespace benchmark {

static const char kStartSeparator[] = "{";
static const char kEndSeparator[] = "}";
static const char kSepBetweenItems[] = ";";

static bool StartWith(const std::string& str, const std::string& substr) {
  return str.find(substr) == 0;
}

static bool EndWith(const std::string& str, const std::string& substr) {
  return str.rfind(substr) == (str.length() - substr.length());
}

static void EraseEndSep(std::string* str) {
  std::string substr = kSepBetweenItems;
  if (EndWith(*str, substr)) {
    str->erase(str->length() - substr.length(), str->length());
  }
}

static std::vector<int64_t> ParseDims(std::string dims_str) {
  std::vector<int64_t> dims;
  std::string token;
  std::istringstream token_stream(dims_str);
  while (std::getline(token_stream, token, 'x')) {
    dims.push_back(std::stoi(token));
  }
  return dims;
}

OpInputConfig::OpInputConfig(std::istream& is) {
  std::string sep;
  is >> sep;
  if (sep == kStartSeparator) {
    while (sep != kEndSeparator) {
      is >> sep;
      if (sep == "name" || sep == "name:") {
        is >> name;
        EraseEndSep(&name);
      } else if (sep == "dims" || sep == "dims:") {
        std::string dims_str;
        is >> dims_str;
        dims = ParseDims(dims_str);
      }
    }
  }
}

OpTesterConfig::OpTesterConfig(const std::string& filename) {
  std::ifstream fin(filename, std::ios::in | std::ios::binary);
  PADDLE_ENFORCE(static_cast<bool>(fin), "Cannot open file %s",
                 filename.c_str());

  Init(fin);
}

void OpTesterConfig::Init(std::istream& is) {
  std::string sep;
  is >> sep;
  if (sep == kStartSeparator) {
    while (sep != kEndSeparator) {
      is >> sep;
      if (sep == "op_type" || sep == "op_type:") {
        is >> op_type;
      } else if (sep == "device_id" || sep == "device_id:") {
        is >> device_id;
      } else if (sep == "repeat" || sep == "repeat:") {
        is >> repeat;
      } else if (sep == "profile" || sep == "profile:") {
        is >> profile;
      } else if (sep == "print_debug_string" || sep == "print_debug_string:") {
        is >> print_debug_string;
      } else if (sep == "input" || sep == "input:") {
        OpInputConfig input_config(is);
        inputs.push_back(input_config);
      }
    }
  }
}

const OpInputConfig* OpTesterConfig::GetInput(const std::string& name) {
  for (size_t i = 0; i < inputs.size(); ++i) {
    if (inputs[i].name == name) {
      return &inputs[i];
    }
  }
  return nullptr;
}

}  // namespace benchmark
}  // namespace operators
}  // namespace paddle