/*
 * Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * 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.
 */

#ifndef otbWrapperParameterList_hxx
#define otbWrapperParameterList_hxx


#include <algorithm>
#include <iterator>

#include "otbCast.h"
#include "otbWrapperParameterList.h"


namespace otb
{

namespace Wrapper
{


/*****************************************************************************/
template <typename T>
ParameterList<T>::ParameterList() : AbstractParameterList(), m_Parameters()
{
}

/*****************************************************************************/
template <typename T>
ParameterList<T>::~ParameterList()
{
}

/*****************************************************************************/
template <typename T>
typename ParameterList<T>::ParameterVector::const_iterator ParameterList<T>::begin() const
{
  return m_Parameters.begin();
}

/*****************************************************************************/
template <typename T>
typename ParameterList<T>::ParameterVector::const_iterator ParameterList<T>::end() const
{
  return m_Parameters.end();
}

/*****************************************************************************/
template <typename T>
bool ParameterList<T>::HasValue() const
{
  return Size() > 0 && std::all_of(begin(), end(), [](auto p) -> bool {
           assert(p != nullptr);
           return p && p->HasValue();
         });
}

/*****************************************************************************/
template <typename T>
void ParameterList<T>::ClearValue()
{
  m_Parameters.clear();

  Superclass::ClearValue();
}

/*****************************************************************************/
template <typename T>
void ParameterList<T>::SetListFromFileName(const StringVector& strings)
{
  this->SetStrings(strings);
}

/*****************************************************************************/
template <typename T>
void ParameterList<T>::InsertNullElement(std::size_t index)
{
  m_Parameters.insert(index >= m_Parameters.size() ? m_Parameters.end() : m_Parameters.begin() + index, typename T::Pointer());

  SetActive(false);

  Modified();
}

/*****************************************************************************/
template <typename T>
void ParameterList<T>::AddFromFileName(const std::string& filename)
{
  assert(!filename.empty());

  typename T::Pointer p(T::New());

  p->FromString(filename);

  m_Parameters.push_back(p);

  assert(!m_Parameters.back().IsNull());

  SetActive(true);

  Modified();
}

/*****************************************************************************/
template <typename T>
void ParameterList<T>::Insert(const std::string& filename, std::size_t index)
{
  typename T::Pointer p(T::New());

  p->FromString(filename);

  InsertElement(p, index);
}

/*****************************************************************************/
template <typename T>
void ParameterList<T>::InsertElement(typename T::Pointer p, std::size_t index)
{
  m_Parameters.insert(m_Parameters.begin() + index, p);

  assert(!m_Parameters.back().IsNull());

  SetActive(true);

  Modified();
}

/*****************************************************************************/
template <typename T>
void ParameterList<T>::SetNthFileName(std::size_t i, const std::string& filename)
{
  assert(i < m_Parameters.size());
  assert(!m_Parameters[i].IsNull());

  m_Parameters[i]->FromString(filename);

  SetActive(true);

  Modified();
}

/*****************************************************************************/
template <typename T>
std::size_t ParameterList<T>::SetStrings(const StringVector& strings)
{
  // First clear previous file chosen
  ClearValue();

  if (!strings.empty())
  {
    std::transform(strings.begin(), strings.end(), std::back_inserter(m_Parameters), [](auto s) -> auto {
      typename T::Pointer parameter(T::New());
      parameter->FromString(s);
      return parameter;
    });

    SetActive(true);
    Modified();
  }
  return strings.size();
}

/*****************************************************************************/
template <typename T>
std::size_t ParameterList<T>::GetStrings(StringVector& strings) const
{
  std::transform(begin(), end(), std::back_inserter(strings), [](auto p) -> auto { return p->ToString(); });

  return m_Parameters.size();
}

/*****************************************************************************/
template <typename T>
StringListInterface::StringVector ParameterList<T>::GetFileNameList() const
{
  StringVector filenames;

  GetStrings(filenames);

  return filenames;
}

/*****************************************************************************/
template <typename T>
std::string ParameterList<T>::GetNthFileName(std::size_t i) const
{
  assert(i < m_Parameters.size());

  return m_Parameters[i]->ToString();
}

/*****************************************************************************/
template <typename T>
const std::string& ParameterList<T>::GetToolTip(std::size_t i) const
{
  assert(i < m_Parameters.size());
  assert(!m_Parameters[i].IsNull());

  return m_Parameters[i]->GetDescription();
}

/*****************************************************************************/
template <typename T>
void ParameterList<T>::Erase(std::size_t start, std::size_t count)
{
  assert(start < m_Parameters.size());
  assert(start + count <= m_Parameters.size());

  m_Parameters.erase(m_Parameters.begin() + start, m_Parameters.begin() + start + count);

  Modified();
}

/*****************************************************************************/
template <typename T>
std::size_t ParameterList<T>::Size() const
{
  return m_Parameters.size();
}

/*****************************************************************************/
template <typename T>
bool ParameterList<T>::IsActive(std::size_t i) const
{
  assert(i < m_Parameters.size());
  assert(!m_Parameters[i].IsNull());

  return m_Parameters[i]->GetActive();
}

/*****************************************************************************/
template <typename T>
void ParameterList<T>::Swap(std::size_t i1, std::size_t i2)
{
  assert(!m_Parameters.empty());

  auto clamp = [this](std::size_t i) -> std::size_t { return i >= m_Parameters.size() ? m_Parameters.size() - 1 : i; };

  std::swap(m_Parameters[clamp(i1)], m_Parameters[clamp(i2)]);
}

/*****************************************************************************/
template <typename T>
template <typename L, typename From, typename Get>
void ParameterList<T>::SetObjectList(L& this_list, const L& list, From from, Get get)
{
  // Force update of input-list elements.
  for (std::size_t i = 0; i < list.Size(); i++)
  {
    assert(list.GetNthElement(i) != nullptr);

    list.GetNthElement(i)->UpdateOutputInformation();
  }

  // Clear previous target list.
  ClearValue();

  for (std::size_t i = 0; i < list.Size(); i++)
  {
    assert(list.GetNthElement(i) != nullptr);

    typename T::Pointer parameter;

    from(parameter, list.GetNthElement(i));

    m_Parameters.push_back(parameter);

    assert(get(parameter) != nullptr);

    this_list.PushBack(get(parameter));
  }

  SetActive(true);

  Modified();
}

/*****************************************************************************/
template <typename T>
template <typename L, typename Get>
typename L::ObjectType* ParameterList<T>::GetObjectList(L& this_list, Get get)
{
  assert(this_list);

  this_list->Clear();

  std::for_each(begin(), end(), [this_list, get](auto parameter) -> void {
    assert(parameter);
    assert(parameter == otb::DynamicCast<T>(parameter));

    assert(get(DynamicCast<T>(parameter)));

    this_list->PushBack(get(DynamicCast<T>(parameter)));
  });

  return this_list;
}

/*****************************************************************************/
template <typename T>
template <typename L, typename Get>
const typename L::ObjectType* ParameterList<T>::GetObjectList(L& this_list, Get get) const
{
  return const_cast<ParameterList<T>*>(this)->GetObjectList(this_list, get);
}

/*****************************************************************************/
template <typename T>
template <typename D, typename From>
void ParameterList<T>::AddData(D* data, From from)
{
  assert(data != nullptr);

  // Check input availability
  data->UpdateOutputInformation();

  // Build & add parameter.
  m_Parameters.push_back(from(data));

  Modified();
}

/*****************************************************************************/
template <typename T>
template <typename D, typename Set>
typename T::Pointer ParameterList<T>::FromData(D* data, Set set, const std::string& description)
{
  assert(data != nullptr);

  typename T::Pointer p(T::New());

  return FromData(p, data, set, description);
}

/*****************************************************************************/
template <typename T>
template <typename D, typename Set>
typename T::Pointer& ParameterList<T>::FromData(typename T::Pointer& parameter, D* data, Set set, const std::string& description)
{
  assert(data != nullptr);

  set(parameter, data);
  parameter->SetDescription(description);

  return parameter;
}

template <typename T>
std::vector<std::string> ParameterList<T>::ToStringList() const
{
  return GetFileNameList();
}

template <typename T>
void ParameterList<T>::FromStringList(const std::vector<std::string>& value)
{
  SetStrings(value);
}

template <typename T>
std::string ParameterList<T>::ToString() const
{
  std::ostringstream oss;
  oss << std::setprecision(10);
  auto strList = GetFileNameList();
  for (size_t i = 0; i < strList.size(); i++)
  {
    if (i != 0)
    {
      oss << " ";
    }
    oss << strList[i];
  }
  return oss.str();
}

template <typename T>
typename T::Pointer ParameterList<T>::GetNthElement(std::size_t i)
{
  return m_Parameters[i];
}

} // End namespace Wrapper


} // End namespace otb


#endif