#include "itemdetailmapper.h"

#include <QAbstractItemModel>
#include <QComboBox>
#include <QDataWidgetMapper>
#include <QGridLayout>
#include <QJsonArray>
#include <QJsonObject>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QSpinBox>
#include <QStringListModel>
#include <QTableView>
#include "model/metadata.h"

ItemDetailMapper::ItemDetailMapper(QWidget* parent)
    : QWidget{parent} {
  /// model mapping
  m_mapper = std::make_unique<QDataWidgetMapper>(this);
  /// BUG: If multiple columns are changed not all changes are applied.
  ///     Multiple changes are set individually by calling setData().
  ///     Probably due to a conflicting dataChanged signal for too many roles&columns the data of
  ///     the remaining columns is reset before setData is called.
  ///     And a manual submit would also create multiple undo steps anyway.
  /// Workaround: ManualSubmit -> AutoSubmit
  // m_mapper->setSubmitPolicy(QDataWidgetMapper::ManualSubmit);
  m_mapper->setSubmitPolicy(QDataWidgetMapper::AutoSubmit);

  /// model mapping buttons
  m_nextButton     = new QPushButton(tr("Ne&xt"));
  m_previousButton = new QPushButton(tr("&Previous"));

  connect(m_previousButton, &QAbstractButton::clicked, this, &ItemDetailMapper::toPrevious);
  connect(m_nextButton, &QAbstractButton::clicked, this, &ItemDetailMapper::toNext);

  /// the individual widgets
  // REFACTOR deduce label names and types from meta data & use a factory
  m_numberLabel = new QLabel(GET_HEADER_FOR_COLUMN(0));
  m_numberBox   = new QSpinBox();
  m_numberBox->setMaximum(1000);

  m_lastNameLabel = new QLabel(GET_HEADER_FOR_COLUMN(1));
  m_lastNameEdit  = new QLineEdit();
  m_lastNameLabel->setBuddy(m_lastNameEdit);

  m_firstNameLabel = new QLabel(GET_HEADER_FOR_COLUMN(2));
  m_firstNameEdit  = new QLineEdit();
  m_firstNameLabel->setBuddy(m_firstNameEdit);

  m_shareTypeLabel = new QLabel(GET_HEADER_FOR_COLUMN(3));
  m_shareTypeBox   = new QComboBox();
  m_shareTypeLabel->setBuddy(m_shareTypeBox);
  m_shareTypeModel = new QStringListModel(SHARE_TYPES, this);
  m_shareTypeBox->setModel(m_shareTypeModel);

  m_amountLabel   = new QLabel(GET_HEADER_FOR_COLUMN(4));
  m_amountSpinBox = new QDoubleSpinBox();
  m_amountLabel->setBuddy(m_amountSpinBox);

  m_biddingTypeLabel = new QLabel(GET_HEADER_FOR_COLUMN(5));
  m_biddingTypeBox   = new QComboBox();
  m_biddingTypeLabel->setBuddy(m_biddingTypeBox);
  m_biddingTypeModel = new QStringListModel(BIDDING_TYPES, this);
  m_biddingTypeBox->setModel(m_biddingTypeModel);

  m_bidding1Label   = new QLabel(GET_HEADER_FOR_COLUMN(6));
  m_bidding1SpinBox = new QSpinBox();
  m_bidding1SpinBox->setMaximum(500);
  m_bidding2Label   = new QLabel(GET_HEADER_FOR_COLUMN(7));
  m_bidding2SpinBox = new QSpinBox();
  m_bidding2SpinBox->setMaximum(500);
  m_bidding3Label   = new QLabel(GET_HEADER_FOR_COLUMN(8));
  m_bidding3SpinBox = new QSpinBox();
  m_bidding3SpinBox->setMaximum(500);

  m_depotWish1Label = new QLabel(GET_HEADER_FOR_COLUMN(9));
  m_depotWish1Edit  = new QLineEdit();
  m_depotWish1Label->setBuddy(m_depotWish1Edit);
  m_depotWish2Label = new QLabel(GET_HEADER_FOR_COLUMN(10));
  m_depotWish2Edit  = new QLineEdit();
  m_depotWish2Label->setBuddy(m_depotWish2Edit);

  m_mailLabel = new QLabel(GET_HEADER_FOR_COLUMN(11));
  m_mailEdit  = new QLineEdit();
  m_mailEdit->setMinimumWidth(200);
  m_mailLabel->setBuddy(m_mailEdit);

  QGridLayout* layout = new QGridLayout();
  layout->addWidget(m_numberLabel, 0, 0, 1, 1);
  layout->addWidget(m_numberBox, 0, 1, 1, 1);
  layout->addWidget(m_lastNameLabel, 1, 0, 1, 1);
  layout->addWidget(m_lastNameEdit, 1, 1, 1, 1);
  layout->addWidget(m_firstNameLabel, 2, 0, 1, 1);
  layout->addWidget(m_firstNameEdit, 2, 1, 1, 1);
  layout->addWidget(m_shareTypeLabel, 3, 0, 1, 1);
  layout->addWidget(m_shareTypeBox, 3, 1, 1, 1);
  layout->addWidget(m_amountLabel, 4, 0, 1, 1);
  layout->addWidget(m_amountSpinBox, 4, 1, 1, 1);
  layout->addWidget(m_biddingTypeLabel, 5, 0, 1, 1);
  layout->addWidget(m_biddingTypeBox, 5, 1, 1, 1);
  layout->addWidget(m_bidding1Label, 6, 0, 1, 1);
  layout->addWidget(m_bidding1SpinBox, 6, 1, 1, 1);
  layout->addWidget(m_bidding2Label, 7, 0, 1, 1);
  layout->addWidget(m_bidding2SpinBox, 7, 1, 1, 1);
  layout->addWidget(m_bidding3Label, 8, 0, 1, 1);
  layout->addWidget(m_bidding3SpinBox, 8, 1, 1, 1);
  layout->addWidget(m_depotWish1Label, 9, 0, 1, 1);
  layout->addWidget(m_depotWish1Edit, 9, 1, 1, 1);
  layout->addWidget(m_depotWish2Label, 10, 0, 1, 1);
  layout->addWidget(m_depotWish2Edit, 10, 1, 1, 1);
  layout->addWidget(m_mailLabel, 11, 0, 1, 1);
  layout->addWidget(m_mailEdit, 11, 1, 1, 1);

  layout->addWidget(m_previousButton, 12, 0, 1, 1);
  layout->addWidget(m_nextButton, 12, 1, 1, 1);

  setLayout(layout);
}

void ItemDetailMapper::setModelMappings(QTableView* tableView) {
  qDebug() << "Setting model...";
  m_tableView      = tableView;
  m_model          = tableView->model();
  m_selectionModel = tableView->selectionModel();

  m_mapper->setModel(m_model);
  m_mapper->addMapping(m_numberBox, 0);
  m_mapper->addMapping(m_lastNameEdit, 1);
  m_mapper->addMapping(m_firstNameEdit, 2);
  m_mapper->addMapping(m_shareTypeBox, 3, "currentText");
  m_mapper->addMapping(m_amountSpinBox, 4);
  m_mapper->addMapping(m_biddingTypeBox, 5, "currentText");
  m_mapper->addMapping(m_bidding1SpinBox, 6);
  m_mapper->addMapping(m_bidding2SpinBox, 7);
  m_mapper->addMapping(m_bidding3SpinBox, 8);
  m_mapper->addMapping(m_depotWish1Edit, 9);
  m_mapper->addMapping(m_depotWish2Edit, 10);
  m_mapper->addMapping(m_mailEdit, 11);

  m_mapper->setCurrentIndex(m_selectionModel->currentIndex().row());

  connect(m_model, &QAbstractItemModel::rowsInserted, this, &ItemDetailMapper::rowsInserted);
  connect(m_model, &QAbstractItemModel::rowsRemoved, this, &ItemDetailMapper::rowsRemoved);
  connect(m_selectionModel, &QItemSelectionModel::currentChanged, this,
          &ItemDetailMapper::onCurrentIndexChanged);

  updateButtons(m_selectionModel->currentIndex().row());
}

bool ItemDetailMapper::submit() { return m_mapper->submit(); }

void ItemDetailMapper::revert() { m_mapper->revert(); }

void ItemDetailMapper::onCurrentIndexChanged(const QModelIndex& current,
                                             const QModelIndex& /*previous*/) {
  if (!isEnabled()) {
    setEnabled(true);
  }
  m_mapper->setCurrentModelIndex(current);
  updateButtons(current.row());
  emitContentChanged(current);
}

void ItemDetailMapper::rowsInserted(const QModelIndex& parent, int start, int end) {
  updateButtons(m_mapper->currentIndex());
}

void ItemDetailMapper::rowsRemoved(const QModelIndex& parent, int start, int end) {
  if (m_model->rowCount() == 0) {
    setEnabled(false);

    // m_nameEdit->clear();
    // m_descriptionEdit->clear();
    // m_infoEdit->clear();
    // m_amountBox->clear();
    // m_factorBox->clear();
  }

  updateButtons(m_mapper->currentIndex());
}

void ItemDetailMapper::toPrevious() {
  int currentRow            = m_selectionModel->currentIndex().row();
  QModelIndex previousIndex = m_selectionModel->currentIndex().siblingAtRow(currentRow - 1);
  if (previousIndex.isValid()) {
    m_selectionModel->setCurrentIndex(previousIndex, QItemSelectionModel::ClearAndSelect);
  }
}

void ItemDetailMapper::toNext() {
  int currentRow        = m_selectionModel->currentIndex().row();
  QModelIndex nextIndex = m_selectionModel->currentIndex().siblingAtRow(currentRow + 1);
  if (nextIndex.isValid()) {
    m_selectionModel->setCurrentIndex(nextIndex, QItemSelectionModel::ClearAndSelect);
  }
}

void ItemDetailMapper::updateButtons(int row) {
  m_previousButton->setEnabled(row > 0);
  m_nextButton->setEnabled(row < m_model->rowCount() - 1);
}

void ItemDetailMapper::emitContentChanged(const QModelIndex& currentIndex) {
  // BUG QR-Code isn't updated after changes through the ItemDetailMapper #18
  QString toStringText = "";
  if (currentIndex.isValid()) {
    toStringText = currentIndex.data(ToStringRole).toString();
  }
  emit contentChanged(toStringText);
}