#include "toonzqt/dvtextedit.h"

#include "toonzqt/gutil.h"

#include <qlabel></qlabel>

#include <qlineedit></qlineedit>

#include <qvboxlayout></qvboxlayout>

#include <qpainter></qpainter>

#include <qtoolbar></qtoolbar>

#include <qfontcombobox></qfontcombobox>

#include <qaction></qaction>

#include <qmouseevent></qmouseevent>

#include <qtextcursor></qtextcursor>

#include <qcolordialog></qcolordialog>

#include <qcombobox></qcombobox>

#include <qfontdatabase></qfontdatabase>

#include "toonzqt/colorfield.h"

namespace {

//-----------------------------------------------------------------------------

qreal distanceBetweenPointandRect(const QRect &rect, const QPoint &point) {

  if (rect.contains(point)) return 0;

  qreal topLeftDistance =

      sqrt(pow((double)(point.x() - rect.topLeft().x()), 2) +

           pow((double)(point.y() - rect.topLeft().y()), 2));

  qreal topRightDistance =

      sqrt(pow((double)(point.x() - rect.topRight().x()), 2) +

           pow((double)(point.y() - rect.topRight().y()), 2));

  qreal bottomLeftDistance =

      sqrt(pow((double)(point.x() - rect.bottomLeft().x()), 2) +

           pow((double)(point.y() - rect.bottomLeft().y()), 2));

  qreal bottomRightDistance =

      sqrt(pow((double)(point.x() - rect.bottomRight().x()), 2) +

           pow((double)(point.y() - rect.bottomRight().y()), 2));

  qreal topMax    = std::min(topLeftDistance, topRightDistance);

  qreal bottomMax = std::min(bottomLeftDistance, bottomRightDistance);

  return std::min(topMax, bottomMax);

}

}

using namespace DVGui;

//=============================================================================

// DvMiniToolBar

//-----------------------------------------------------------------------------

DvMiniToolBar::DvMiniToolBar(QWidget *parent)

    : QFrame(parent), m_dragPos(0, 0) {

  setObjectName("DvMiniToolBar");

  setWindowFlags(Qt::Tool | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);

}

//-----------------------------------------------------------------------------

DvMiniToolBar::~DvMiniToolBar() {}

//-----------------------------------------------------------------------------

void DvMiniToolBar::mousePressEvent(QMouseEvent *e) {

  if (e->button() == Qt::LeftButton)

    m_dragPos = e->globalPos() - frameGeometry().topLeft();

  QWidget::mousePressEvent(e);

}

//-----------------------------------------------------------------------------

void DvMiniToolBar::mouseMoveEvent(QMouseEvent *e) {

  if (e->buttons() == Qt::LeftButton) move(e->globalPos() - m_dragPos);

  QWidget::mouseMoveEvent(e);

}

//=============================================================================

// DvTextEditButton

//-----------------------------------------------------------------------------

DvTextEditButton::DvTextEditButton(QWidget *parent) : QWidget(parent) {

  setWindowFlags(Qt::Tool | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);

  setFixedSize(16, 16);

}

//-----------------------------------------------------------------------------

DvTextEditButton::~DvTextEditButton() {}

//-----------------------------------------------------------------------------

void DvTextEditButton::paintEvent(QPaintEvent *) {

  QPainter p(this);

  static QPixmap pixmap(":Resources/text_edit_button.png");

  p.drawPixmap(0, 0, width(), height(), pixmap);

}

//-----------------------------------------------------------------------------

void DvTextEditButton::mousePressEvent(QMouseEvent *) {

  emit clicked();

  hide();

}

//=============================================================================

// DvTextEdit

//-----------------------------------------------------------------------------

DvTextEdit::DvTextEdit(QWidget *parent)

    : QTextEdit(parent), m_miniToolBarEnabled(true), m_mousePos(0, 0) {

  setMouseTracking(true);

  createActions();

  createMiniToolBar();

  m_button = new DvTextEditButton(0);

  m_button->hide();

  connect(m_button, SIGNAL(clicked()), this, SLOT(onShowMiniToolBarClicked()));

  fontChanged(font());

  setTextColor(TPixel32::Black, false);

  alignmentChanged(alignment());

  connect(this, SIGNAL(currentCharFormatChanged(const QTextCharFormat &)), this,

          SLOT(onCurrentCharFormatChanged(const QTextCharFormat &)));

  connect(this, SIGNAL(cursorPositionChanged()), this,

          SLOT(onCursorPositionChanged()));

  connect(this, SIGNAL(selectionChanged()), this, SLOT(onSelectionChanged()));

}

//-----------------------------------------------------------------------------

void DvTextEdit::changeFont(const QFont &f) {

  QTextCharFormat fmt = currentCharFormat();

  // bool aux = fmt.fontUnderline();

  fmt.setFont(f);

  // fmt.setFontHintingPreference(QFont::PreferFullHinting);

  mergeFormatOnWordOrSelection(fmt);

}

//-----------------------------------------

DvTextEdit::~DvTextEdit() {}

//-----------------------------------------------------------------------------

void DvTextEdit::createActions() {

  m_boldAction = new QAction(createQIcon("bold"), tr("Bold"), this);

  m_boldAction->setCheckable(true);

  connect(m_boldAction, SIGNAL(triggered()), this, SLOT(setTextBold()));

  m_italicAction = new QAction(createQIcon("italic"), tr("Italic"), this);

  m_italicAction->setCheckable(true);

  connect(m_italicAction, SIGNAL(triggered()), this, SLOT(setTextItalic()));

  m_underlineAction =

      new QAction(createQIcon("underline"), tr("Underline"), this);

  m_underlineAction->setCheckable(true);

  connect(m_underlineAction, SIGNAL(triggered()), this,

          SLOT(setTextUnderline()));

  m_colorField = new DVGui::ColorField(this, true, TPixel32(), 30);

  m_colorField->hideChannelsFields(true);

  connect(m_colorField, SIGNAL(colorChanged(const TPixel32 &, bool)), this,

          SLOT(setTextColor(const TPixel32 &, bool)));

  m_alignActionGroup = new QActionGroup(this);

  connect(m_alignActionGroup, SIGNAL(triggered(QAction *)), this,

          SLOT(setTextAlign(QAction *)));

  m_alignLeftAction = new QAction(createQIcon("align_left"), tr("Align Left"),

                                  m_alignActionGroup);

  m_alignLeftAction->setCheckable(true);

  m_alignCenterAction = new QAction(createQIcon("align_center"),

                                    tr("Align Center"), m_alignActionGroup);

  m_alignCenterAction->setCheckable(true);

  m_alignRightAction = new QAction(createQIcon("align_right"),

                                   tr("Align Right"), m_alignActionGroup);

  m_alignRightAction->setCheckable(true);

}

//-----------------------------------------------------------------------------

void DvTextEdit::createMiniToolBar() {

  m_miniToolBar = new DvMiniToolBar();

  QToolBar *toolBarUp = new QToolBar(m_miniToolBar);

  toolBarUp->setIconSize(QSize(16, 16));

  toolBarUp->setObjectName("toolOptionBar");

  toolBarUp->setFixedHeight(30);

  m_fontComboBox = new QFontComboBox(toolBarUp);

  m_fontComboBox->setMaximumHeight(20);

  m_fontComboBox->setMinimumWidth(140);

  connect(m_fontComboBox, SIGNAL(activated(const QString &)), this,

          SLOT(setTextFamily(const QString &)));

  m_sizeComboBox = new QComboBox(toolBarUp);

  m_sizeComboBox->setEditable(true);

  m_sizeComboBox->setMaximumHeight(20);

  m_sizeComboBox->setMinimumWidth(44);

  QFontDatabase db;

  for (int size : db.standardSizes())

    m_sizeComboBox->addItem(QString::number(size));

  connect(m_sizeComboBox, SIGNAL(activated(const QString &)), this,

          SLOT(setTextSize(const QString &)));

  toolBarUp->addWidget(m_fontComboBox);

  toolBarUp->addWidget(m_sizeComboBox);

  QToolBar *toolBarDown = new QToolBar(m_miniToolBar);

  toolBarDown->setIconSize(QSize(30, 30));

  toolBarDown->setObjectName("toolOptionBar");

  toolBarDown->setFixedHeight(30);

  toolBarDown->setIconSize(QSize(30, 30));

  toolBarDown->addWidget(m_colorField);

  toolBarDown->addSeparator();

  toolBarDown->addAction(m_boldAction);

  toolBarDown->addAction(m_italicAction);

  toolBarDown->addAction(m_underlineAction);

  toolBarDown->addSeparator();

  toolBarDown->addActions(m_alignActionGroup->actions());

  QVBoxLayout *m_mainLayout = new QVBoxLayout(m_miniToolBar);

  m_mainLayout->setSizeConstraint(QLayout::SetFixedSize);

  m_mainLayout->setMargin(2);

  m_mainLayout->setSpacing(2);

  m_mainLayout->addWidget(toolBarUp);

  m_mainLayout->addWidget(toolBarDown);

  m_miniToolBar->setLayout(m_mainLayout);

}

//-----------------------------------------------------------------------------

void DvTextEdit::mouseReleaseEvent(QMouseEvent *e) {

  QTextEdit::mouseReleaseEvent(e);

  if (e->button() == Qt::LeftButton && m_miniToolBarEnabled) {

    QTextCursor cursor = textCursor();

    if (cursor.hasSelection()) {

      cursor.setPosition(cursor.selectionEnd(), QTextCursor::MoveAnchor);

      QRect r          = cursorRect(cursor);

      QPoint buttonPos = mapToGlobal(r.topRight());

      buttonPos.setX(buttonPos.x() - r.width() * 0.5 + 2);

      buttonPos.setY(buttonPos.y() - (m_button->height() - r.height()) * 0.5);

      m_button->move(buttonPos);

      m_button->show();

    }

  }

}

//-----------------------------------------------------------------------------

void DvTextEdit::mousePressEvent(QMouseEvent *e) {

  QTextEdit::mousePressEvent(e);

  if (m_miniToolBarEnabled && m_miniToolBar->isVisible()) hideMiniToolBar();

}

//-----------------------------------------------------------------------------

void DvTextEdit::mouseMoveEvent(QMouseEvent *event) {

  QTextEdit::mouseMoveEvent(event);

  m_mousePos = event->pos();

}

//-----------------------------------------------------------------------------

void DvTextEdit::wheelEvent(QWheelEvent *e) {

  QTextEdit::wheelEvent(e);

  m_button->hide();

}

//-----------------------------------------------------------------------------

void DvTextEdit::focusOutEvent(QFocusEvent *e) {

  QTextEdit::focusOutEvent(e);

  if (m_miniToolBar->isVisible() && !m_miniToolBar->underMouse()) {

    hideMiniToolBar();

  }

  m_button->hide();

}

//-----------------------------------------------------------------------------

void DvTextEdit::focusInEvent(QFocusEvent *e) {

  QTextEdit::focusInEvent(e);

  emit focusIn();

}

//-----------------------------------------------------------------------------

void DvTextEdit::dragMoveEvent(QDragMoveEvent *e) {

  // Se inizio un drag e la toolbar è visibile la nascondo

  if (m_miniToolBar->isVisible()) hideMiniToolBar();

  m_button->hide();

  QTextEdit::dragMoveEvent(e);

}

//-----------------------------------------------------------------------------

void DvTextEdit::showMiniToolBar(const QPoint &pos) {

  if (m_miniToolBarEnabled) {

    m_miniToolBar->move(pos);

    m_miniToolBar->show();

  }

}

//-----------------------------------------------------------------------------

void DvTextEdit::hideMiniToolBar() {

  // Hide the miniToolBar

  m_miniToolBar->hide();

  // Store the current Font in the application

  QTextCursor cursor = textCursor();

}

//-----------------------------------------------------------------------------

void DvTextEdit::setTextBold() {

  QTextCharFormat fmt;

  fmt.setFontWeight(m_boldAction->isChecked() ? QFont::Bold : QFont::Normal);

  mergeFormatOnWordOrSelection(fmt);

}

//-----------------------------------------------------------------------------

void DvTextEdit::setTextItalic() {

  QTextCharFormat fmt;

  fmt.setFontItalic(m_italicAction->isChecked());

  mergeFormatOnWordOrSelection(fmt);

}

//-----------------------------------------------------------------------------

void DvTextEdit::setTextUnderline() {

  QTextCharFormat fmt;

  fmt.setFontUnderline(m_underlineAction->isChecked());

  mergeFormatOnWordOrSelection(fmt);

}

//-----------------------------------------------------------------------------

void DvTextEdit::setTextColor(const TPixel32 &color, bool isDragging) {

  if (isDragging) return;

  QColor col(color.r, color.g, color.b, color.m);

  QTextCharFormat fmt;

  fmt.setForeground(col);

  mergeFormatOnWordOrSelection(fmt);

  colorChanged(col);

}

//-----------------------------------------------------------------------------

void DvTextEdit::setTextFamily(const QString &f) {

  QTextCharFormat fmt;

  fmt.setFontFamily(f);

  mergeFormatOnWordOrSelection(fmt);

}

//-----------------------------------------------------------------------------

void DvTextEdit::setTextSize(const QString &p) {

  QTextCharFormat fmt;

  fmt.setFontPointSize(p.toFloat());

  mergeFormatOnWordOrSelection(fmt);

}

//-----------------------------------------------------------------------------

void DvTextEdit::setTextAlign(QAction *a) {

  if (a == m_alignLeftAction)

    setAlignment(Qt::AlignLeft);

  else if (a == m_alignCenterAction)

    setAlignment(Qt::AlignHCenter);

  else if (a == m_alignRightAction)

    setAlignment(Qt::AlignRight);

}

//-----------------------------------------------------------------------------

void DvTextEdit::mergeFormatOnWordOrSelection(const QTextCharFormat &format) {

  QTextCursor cursor = textCursor();

  if (!cursor.hasSelection()) cursor.select(QTextCursor::WordUnderCursor);

  cursor.mergeCharFormat(format);

  mergeCurrentCharFormat(format);

  emit textChanged();

}

//-----------------------------------------------------------------------------

void DvTextEdit::fontChanged(const QFont &f) {

  m_fontComboBox->setCurrentIndex(

      m_fontComboBox->findText(QFontInfo(f).family()));

  m_sizeComboBox->setCurrentIndex(

      m_sizeComboBox->findText(QString::number(f.pointSize())));

  m_boldAction->setChecked(f.bold());

  m_italicAction->setChecked(f.italic());

  m_underlineAction->setChecked(f.underline());

}

//-----------------------------------------------------------------------------

void DvTextEdit::colorChanged(const QColor &c) {

  m_colorField->setColor(TPixel32(c.red(), c.green(), c.blue(), c.alpha()));

}

//-----------------------------------------------------------------------------

void DvTextEdit::alignmentChanged(Qt::Alignment a) {

  if (a & Qt::AlignLeft) {

    m_alignLeftAction->setChecked(true);

  } else if (a & Qt::AlignHCenter) {

    m_alignCenterAction->setChecked(true);

  } else if (a & Qt::AlignRight) {

    m_alignRightAction->setChecked(true);

  }

}

//-----------------------------------------------------------------------------

void DvTextEdit::onCurrentCharFormatChanged(const QTextCharFormat &format) {

  fontChanged(format.font());

  colorChanged(format.foreground().color());

}

//-----------------------------------------------------------------------------

void DvTextEdit::onCursorPositionChanged() { alignmentChanged(alignment()); }

//-----------------------------------------------------------------------------

void DvTextEdit::onShowMiniToolBarClicked() {

  showMiniToolBar(m_button->pos());

}

//-----------------------------------------------------------------------------

void DvTextEdit::onSelectionChanged() {

  QTextCursor cursor = textCursor();

  if (!cursor.hasSelection()) m_button->hide();

}

//-----------------------------------------------------------------------------