#include <scwx/qt/model/tree_item.hpp>

namespace scwx
{
namespace qt
{
namespace model
{

static const std::string logPrefix_ = "scwx::qt::model::tree_item";

class TreeItem::Impl
{
public:
   explicit Impl(const std::vector<QVariant>& data, TreeItem* parent) :
       childItems_ {}, itemData_ {data}, parentItem_ {parent}
   {
   }
   ~Impl() { qDeleteAll(childItems_); }

   std::vector<TreeItem*> childItems_;
   std::vector<QVariant>  itemData_;
   TreeItem*              parentItem_;
};

TreeItem::TreeItem(const std::vector<QVariant>& data, TreeItem* parent) :
    p {std::make_unique<Impl>(data, parent)}
{
}

TreeItem::~TreeItem() {}

TreeItem::TreeItem(TreeItem&&) noexcept            = default;
TreeItem& TreeItem::operator=(TreeItem&&) noexcept = default;

void TreeItem::AppendChild(TreeItem* item)
{
   item->p->parentItem_ = this;
   p->childItems_.push_back(item);
}

const TreeItem* TreeItem::child(int row) const
{
   const TreeItem* item = nullptr;

   if (0 <= row && row < p->childItems_.size())
   {
      item = p->childItems_[row];
   }

   return item;
}

int TreeItem::child_count() const
{
   return static_cast<int>(p->childItems_.size());
}

int TreeItem::column_count() const
{
   return static_cast<int>(p->itemData_.size());
}

QVariant TreeItem::data(int column) const
{
   if (0 <= column && column < p->itemData_.size())
   {
      return p->itemData_[column];
   }
   else
   {
      return QVariant();
   }
}

int TreeItem::row() const
{
   int row = 0;

   if (p->parentItem_ != nullptr)
   {
      const auto& childItems = p->parentItem_->p->childItems_;
      row =
         std::distance(childItems.cbegin(),
                       std::find(childItems.cbegin(), childItems.cend(), this));
   }

   return row;
}

const TreeItem* TreeItem::parent_item() const
{
   return p->parentItem_;
}

} // namespace model
} // namespace qt
} // namespace scwx