#include "BoolFunctionModel.hpp"

#include <QtCore/QJsonValue>
#include <QtGui/QDoubleValidator>

#include <QtWidgets/QWidget>
#include <QtWidgets/QLineEdit>
#include <QtWidgets/QComboBox>
#include <QtWidgets/QLineEdit>
#include <QtWidgets/QFormLayout>

#include "ExpressionBoolData.hpp"

#include <cmath>

#include <QtCore/QDebug>

BoolFunctionModel::
BoolFunctionModel()
{
  createNameAndBoolFunctions();

  _widget = new QWidget();

  auto l = new QFormLayout();

  _functionComboBox = new QComboBox;

  for (auto const & f  : _nameAndBoolFunctions)
  {
    _functionComboBox->addItem(std::get<0>(f));
  }

  _variableLabel = new QLineEdit();
  _variableLabel->setReadOnly(true);

  _rangeLabel = new QLineEdit();
  _variableLabel->setReadOnly(true);
  _rangeLabel->setMaximumWidth(200);

  l->addRow("Function:", _functionComboBox);
  l->addRow("Variable:", _variableLabel);
  l->addRow("Range:", _rangeLabel);

  _widget->setLayout(l);

  connect(_functionComboBox, SIGNAL(currentIndexChanged(int)),
          this, SLOT(onFunctionIndexChanged(int)));
}


void
BoolFunctionModel::
onFunctionIndexChanged(int index)
{
  processData();
}


QJsonObject
BoolFunctionModel::
save() const
{
  QJsonObject modelJson = NodeDataModel::save();

  if (_expression)
    modelJson["expression"] = _expression->expression();

  return modelJson;
}


void
BoolFunctionModel::
restore(QJsonObject const &p)
{
  QJsonValue v = p["expression"];

  if (!v.isUndefined())
  {
    QString str = v.toString();

    std::vector<bool> d;
    d.push_back(true);

    _expression = std::make_shared<ExpressionBoolData>(str, d);
    _variableLabel->setText(str);
  }
}


unsigned int
BoolFunctionModel::
nPorts(PortType portType) const
{
  unsigned int result = 1;

  switch (portType)
  {
    case PortType::In:
      result = 2;
      break;

    case PortType::Out:
      result = 1;

    default:
      break;
  }

  return result;
}


NodeDataType
BoolFunctionModel::
dataType(PortType, PortIndex) const
{
  return ExpressionBoolData().type();
}


std::shared_ptr<NodeData>
BoolFunctionModel::
outData(PortIndex)
{
  return _expression;
}


QString
BoolFunctionModel::
convertBoolRangeToText(std::vector<bool> const &range) const
{
  QString result("(");

  for (std::size_t i = 0; i < range.size() - 1; ++i)
  {
    result = result + (range[i] ? "t" : "f") + ", ";
  }

  result = result + (range.back() ? "t" : "f") + ")";

  return result;
}


std::vector<bool>
BoolFunctionModel::
applyFunction(std::vector<bool> const &range1,
              std::vector<bool> const &range2) const
{
  std::vector<bool> result;

  BoolFunctionPtr const & f =
    std::get<2>(_nameAndBoolFunctions[_functionComboBox->currentIndex()]);

  for (std::size_t i = 0; i < range1.size(); ++i)
  {
    result.push_back(f(range1[i], range2[i]));
  }

  return result;
}


void
BoolFunctionModel::
createNameAndBoolFunctions()
{
  _nameAndBoolFunctions.push_back(
    std::make_tuple(QString("&&"),
                    QString("( %1 && %2 )"),
                    static_cast<BoolFunctionPtr>([](bool a, bool b) {
    return (a && b);
  })));

  _nameAndBoolFunctions.push_back(
    std::make_tuple(QString(" || "),
                    QString("( %1 || %2 )"),
                    static_cast<BoolFunctionPtr>([](bool a, bool b) {
    return (a || b);
  })));
}


void
BoolFunctionModel::
processData()
{
  auto inputExpression1 = _input1.lock();
  auto inputExpression2 = _input2.lock();

  if (inputExpression1 && inputExpression2)
  {
    QString input1 = inputExpression1->expression();
    QString input2 = inputExpression2->expression();

    std::vector<bool> const & inputRange1 = inputExpression1->range();
    std::vector<bool> const & inputRange2 = inputExpression2->range();

    std::vector<bool> modifiedRange = applyFunction(inputRange1, inputRange2);

    QString tt = std::get<1>(_nameAndBoolFunctions[_functionComboBox->currentIndex()]);

    _expression = std::make_shared<ExpressionBoolData>(tt.arg(input1).arg(input2), modifiedRange);

    _variableLabel->setText(_expression->expression());
    _variableLabel->adjustSize();

    _rangeLabel->setText(convertBoolRangeToText(modifiedRange));
    _rangeLabel->adjustSize();

    emit dataUpdated(0);
  }
}


void
BoolFunctionModel::
setInData(std::shared_ptr<NodeData> nodeData, PortIndex portIndex)
{
  auto data = std::dynamic_pointer_cast<ExpressionBoolData>(nodeData);

  if (portIndex == 0)
  {
    _input1 = data;
  }
  else
  {
    _input2 = data;
  }

  processData();
}


QWidget *
BoolFunctionModel::
embeddedWidget()
{
  return _widget;
}