//@HEADER
// ***************************************************
//
// HPCG: High Performance Conjugate Gradient Benchmark
//
// Contact:
// Michael A. Heroux ( maherou@sandia.gov)
// Jack Dongarra     (dongarra@eecs.utk.edu)
// Piotr Luszczek    (luszczek@eecs.utk.edu)
//
// ***************************************************
//@HEADER

/*!
 @file YAML_Element.cpp

 HPCG routine
 */

#include "YAML_Element.hpp"
#include <fstream>
#include <iostream>
#include <sstream>
using namespace std;
YAML_Element::YAML_Element(const std::string& key_arg, const std::string& value_arg)
{
    key = key_arg;
    value = value_arg;
}

YAML_Element::~YAML_Element()
{
    for (size_t i = 0; i < children.size(); i++)
    {
        delete children[i];
    }
    children.clear();
}

/*!
  Add an element to the vector
  QUESTION: if an element is not added because the key already exists,
  will this lead to memory leakage?

  @param[in] key_arg   The key under which the element is stored
  @param[in] value_arg The value of the element

  @return Returns the added element
*/
YAML_Element* YAML_Element::add(const std::string& key_arg, double value_arg)
{
    this->value = "";
    string converted_value = convert_double_to_string(value_arg);
    YAML_Element* element = new YAML_Element(key_arg, converted_value);
    children.push_back(element);
    return element;
}

/*!
  Add an element to the vector

  @param[in] key_arg   The key under which the element is stored
  @param[in] value_arg The value of the element

  @return Returns the added element
*/
YAML_Element* YAML_Element::add(const std::string& key_arg, int value_arg)
{
    this->value = "";
    string converted_value = convert_int_to_string(value_arg);
    YAML_Element* element = new YAML_Element(key_arg, converted_value);
    children.push_back(element);
    return element;
}

#ifndef HPCG_NO_LONG_LONG

/*!
  Add an element to the vector

  @param[in] key_arg   The key under which the element is stored
  @param[in] value_arg The value of the element

  @return Returns the added element
*/
YAML_Element* YAML_Element::add(const std::string& key_arg, long long value_arg)
{
    this->value = "";
    string converted_value = convert_long_long_to_string(value_arg);
    YAML_Element* element = new YAML_Element(key_arg, converted_value);
    children.push_back(element);
    return element;
}

#endif

/*!
  Add an element to the vector

  @param[in] key_arg   The key under which the element is stored
  @param[in] value_arg The value of the element

  @return Returns the added element
*/
YAML_Element* YAML_Element::add(const std::string& key_arg, size_t value_arg)
{
    this->value = "";
    string converted_value = convert_size_t_to_string(value_arg);
    YAML_Element* element = new YAML_Element(key_arg, converted_value);
    children.push_back(element);
    return element;
}

/*!
  Add an element to the vector

  @param[in] key_arg   The key under which the element is stored
  @param[in] value_arg The value of the element

  @return Returns the added element
*/
YAML_Element* YAML_Element::add(const std::string& key_arg, const std::string& value_arg)
{
    this->value = "";
    YAML_Element* element = new YAML_Element(key_arg, value_arg);
    children.push_back(element);
    return element;
}

/*!
  Returns the pointer to the YAML_Element for the given key.
  @param[in] key_arg   The key under which the element was stored

  @return If found, returns the element, otherwise returns NULL
*/
YAML_Element* YAML_Element::get(const std::string& key_arg)
{
    for (size_t i = 0; i < children.size(); i++)
    {
        if (children[i]->getKey() == key_arg)
        {
            return children[i];
        }
    }
    return 0;
}

/*!
  Prints a line of a YAML document.  Correct YAML depends on
  correct spacing; the parameter space should be the proper
  amount of space for the parent element

  @param[in] space spacing inserted at the beginning of the line

  @return Returns a single line of the YAML document without the leading white space
*/
string YAML_Element::printYAML(std::string space)
{
    string yaml_line = space + key + ": " + value + "\n";
    for (int i = 0; i < 2; i++)
        space = space + " ";
    for (size_t i = 0; i < children.size(); i++)
    {
        yaml_line = yaml_line + children[i]->printYAML(space);
    }
    return yaml_line;
}

/*!
  Converts a double precision value to a string.

  @param[in] value_arg The value to be converted.
*/
string YAML_Element::convert_double_to_string(double value_arg)
{
    stringstream strm;
    strm << value_arg;
    return strm.str();
}

/*!
  Converts a integer value to a string.

  @param[in] value_arg The value to be converted.
*/
string YAML_Element::convert_int_to_string(int value_arg)
{
    stringstream strm;
    strm << value_arg;
    return strm.str();
}

#ifndef HPCG_NO_LONG_LONG

/*!
  Converts a "long long" integer value to a string.

  @param[in] value_arg The value to be converted.
*/
string YAML_Element::convert_long_long_to_string(long long value_arg)
{
    stringstream strm;
    strm << value_arg;
    return strm.str();
}

#endif

/*!
  Converts a "size_t" integer value to a string.

  @param[in] value_arg The value to be converted.
*/
string YAML_Element::convert_size_t_to_string(size_t value_arg)
{
    stringstream strm;
    strm << value_arg;
    return strm.str();
}