#include "itemdetailmapper.h"

#include <data/settingshandler.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}
    , m_qrCodeDisplay(new QLabel("QR Code")) {
  /// 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 types from meta data & use a factory
  /// left layout
  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);

  /// right layout
  m_createOnlineAccountButton = new QPushButton(tr("&Create account"));
  m_sendInviteMailButton      = new QPushButton(tr("&Send invite"));

  m_onlineIdLabel   = new QLabel(GET_HEADER_FOR_COLUMN(12));
  m_onlineIdDisplay = new QLineEdit();
  m_onlineIdDisplay->setReadOnly(true);
  m_onlineIdLabel->setBuddy(m_onlineIdDisplay);

  m_accessCodeLabel   = new QLabel(GET_HEADER_FOR_COLUMN(13));
  m_accessCodeDisplay = new QLineEdit();
  m_accessCodeDisplay->setReadOnly(true);
  m_accessCodeLabel->setBuddy(m_onlineIdDisplay);

  updateQRCode();
  connect(this, &ItemDetailMapper::contentChanged, this, &ItemDetailMapper::updateQRCode);

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

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

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

  /// right layout
  QVBoxLayout* rightLayout                = new QVBoxLayout;
  QHBoxLayout* onlineAccountControlLayout = new QHBoxLayout;
  onlineAccountControlLayout->addWidget(m_createOnlineAccountButton);
  onlineAccountControlLayout->addWidget(m_sendInviteMailButton);
  rightLayout->addLayout(onlineAccountControlLayout);
  QGridLayout* rightGridLayout = new QGridLayout();
  rightGridLayout->addWidget(m_onlineIdLabel, 0, 0, 1, 1);
  rightGridLayout->addWidget(m_onlineIdDisplay, 0, 1, 1, 1);
  rightGridLayout->addWidget(m_accessCodeLabel, 1, 0, 1, 1);
  rightGridLayout->addWidget(m_accessCodeDisplay, 1, 1, 1, 1);
  rightGridLayout->addWidget(m_qrCodeDisplay, 2, 0, 6, 2);
  rightGridLayout->addWidget(m_accessUrlDisplay, 9, 0, 1, 2);
  rightLayout->addLayout(rightGridLayout);

  QHBoxLayout* outerLayout = new QHBoxLayout;
  outerLayout->addLayout(leftLayout);
  outerLayout->addLayout(rightLayout);
  setLayout(outerLayout);

  const QVariantMap serverSettings = SettingsHandler::getSettings("Server");
  const QString urlValue           = serverSettings.value("url").toString();
  m_serverUrl                      = urlValue;

  /// online user account
  connect(m_mailEdit, &QLineEdit::textChanged, this, &ItemDetailMapper::onMailEditChanged);
  connect(m_onlineIdDisplay, &QLineEdit::textChanged, this, &ItemDetailMapper::onOnlineIDChanged);
  connect(m_accessCodeDisplay, &QLineEdit::textChanged, this,
          &ItemDetailMapper::onAccessCodeChanged);

  connect(m_createOnlineAccountButton, &QAbstractButton::clicked, this,
          &ItemDetailMapper::onCreateOnlineAccountTriggered);
  connect(m_sendInviteMailButton, &QAbstractButton::clicked, this,
          &ItemDetailMapper::onSendInviteMailTriggered);
}

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->addMapping(m_onlineIdDisplay, 12);
  m_mapper->addMapping(m_accessCodeDisplay, 13);

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

void ItemDetailMapper::updateQRCode(const QString text) {
  QImage unscaledImage;
  if (text.isEmpty()) {
    unscaledImage = QImage("://no-picture-taking.png");
  } else {
    unscaledImage = m_generator.generateQr(text);
  }
  QImage image = unscaledImage.scaled(250, 250);

  m_qrCodeDisplay->setPixmap(QPixmap::fromImage(image));
  m_qrCodeDisplay->setToolTip(text);
}

void ItemDetailMapper::onMailEditChanged(const QString& text) {
  if (text.isEmpty()) {
    m_createOnlineAccountButton->setEnabled(false);
    m_sendInviteMailButton->setEnabled(false);
  } else {
    onOnlineIDChanged(m_onlineIdDisplay->text());
    onAccessCodeChanged(m_accessCodeDisplay->text());
  }
}

void ItemDetailMapper::onOnlineIDChanged(const QString& text) {
  if (text.isEmpty()) {
    m_createOnlineAccountButton->setEnabled(true);
    m_sendInviteMailButton->setEnabled(false);
  } else {
    m_createOnlineAccountButton->setEnabled(false);
    m_sendInviteMailButton->setEnabled(true);
  }
}

void ItemDetailMapper::onAccessCodeChanged(const QString& accessCode) {
  if (accessCode.isEmpty()) {
    m_sendInviteMailButton->setEnabled(false);
    m_accessUrlDisplay->setText("");
    updateQRCode("");
  } else {
    m_sendInviteMailButton->setEnabled(true);
    const QString accessUrl = m_serverUrl + "/log_in/" + accessCode;
    // const QString accessUrl = "https://bietrunde.das-gruene-zebra.de/log_in/" + text;
    m_accessUrlDisplay->setText(accessUrl);
    updateQRCode(accessUrl);
  }
}

void ItemDetailMapper::onCreateOnlineAccountTriggered() {
  emit createOnlineAccountTriggered(m_mailEdit->text());
}

void ItemDetailMapper::onSendInviteMailTriggered() {
  emit sendInviteMailTriggered(m_mailEdit->text());
}