/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2020 Olive Team

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.

***/

#include "value.h"

namespace olive {

NodeValueTable NodeValueDatabase::Merge() const
{
  QHash<QString, NodeValueTable> copy = tables_;

  // Kinda hacky, but we don't need this table to slipstream
  copy.remove(QStringLiteral("global"));

  return NodeValueTable::Merge(copy.values());
}

NodeValue::NodeValue() :
  type_(NodeParam::kNone),
  from_(nullptr)
{
}

NodeValue::NodeValue(const NodeParam::DataType &type, const QVariant &data, const Node *from, const QString &tag) :
  type_(type),
  data_(data),
  from_(from),
  tag_(tag)
{
}

bool NodeValue::operator==(const NodeValue &rhs) const
{
  return type_ == rhs.type_ && tag_ == rhs.tag_ && data_ == rhs.data_;
}

QVariant NodeValueTable::Get(const NodeParam::DataType &type, const QString &tag) const
{
  return GetWithMeta(type, tag).data();
}

NodeValue NodeValueTable::GetWithMeta(const NodeParam::DataType &type, const QString &tag) const
{
  int value_index = GetInternal(type, tag);

  if (value_index >= 0) {
    return values_.at(value_index);
  }

  return NodeValue();
}

QVariant NodeValueTable::Take(const NodeParam::DataType &type, const QString &tag)
{
  return TakeWithMeta(type, tag).data();
}

NodeValue NodeValueTable::TakeWithMeta(const NodeParam::DataType &type, const QString &tag)
{
  int value_index = GetInternal(type, tag);

  if (value_index >= 0) {
    return values_.takeAt(value_index);
  }

  return NodeValue();
}

bool NodeValueTable::Has(const NodeParam::DataType &type) const
{
  for (int i=values_.size() - 1;i>=0;i--) {
    const NodeValue& v = values_.at(i);

    if (v.type() & type) {
      return true;
    }
  }

  return false;
}

void NodeValueTable::Remove(const NodeValue &v)
{
  for (int i=values_.size() - 1;i>=0;i--) {
    const NodeValue& compare = values_.at(i);

    if (compare == v) {
      values_.removeAt(i);
      return;
    }
  }
}

NodeValueTable NodeValueTable::Merge(QList<NodeValueTable> tables)
{


  if (tables.size() == 1) {
    return tables.first();
  }

  int row = 0;

  NodeValueTable merged_table;

  // Slipstreams all tables together
  foreach (const NodeValueTable& t, tables) {
    if (row >= t.Count()) {
      continue;
    }

    int row_index = t.Count() - 1 - row;

    merged_table.Prepend(t.at(row_index));
  }

  return merged_table;
}

int NodeValueTable::GetInternal(const NodeParam::DataType &type, const QString &tag) const
{
  int index = -1;

  for (int i=values_.size() - 1;i>=0;i--) {
    const NodeValue& v = values_.at(i);

    if (v.type() & type) {
      index = i;

      if (tag.isEmpty() || tag == v.tag()) {
        break;
      }
    }
  }

  return index;
}

}