/* This file is part of Clementine.
   Copyright 2010, David Sansome <me@davidsansome.com>

   Clementine 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.

   Clementine 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 Clementine.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef LINEEDIT_H
#define LINEEDIT_H

#include <QLineEdit>
#include <QPlainTextEdit>
#include <QSpinBox>

#include "ui/iconloader.h"

class QToolButton;

class LineEditInterface {
 public:
  LineEditInterface(QWidget* widget) : widget_(widget) {}

  QWidget* widget() const { return widget_; }

  virtual ~LineEditInterface() {}

  virtual void clear() { set_text(QString()); }
  virtual void set_focus() = 0;
  virtual QString text() const = 0;
  virtual void set_text(const QString& text) = 0;

  virtual QString hint() const = 0;
  virtual void set_hint(const QString& hint) = 0;
  virtual void clear_hint() = 0;

  virtual void set_enabled(bool enabled) = 0;

 protected:
  QWidget* widget_;
};

class ExtendedEditor : public LineEditInterface {
 public:
  ExtendedEditor(QWidget* widget, int extra_right_padding = 0,
                 bool draw_hint = true);
  virtual ~ExtendedEditor() {}

  virtual bool is_empty() const { return text().isEmpty(); }

  QString hint() const { return hint_; }
  void set_hint(const QString& hint);
  void clear_hint() { set_hint(QString()); }

  bool has_clear_button() const { return has_clear_button_; }
  void set_clear_button(bool visible);

  bool has_reset_button() const;
  void set_reset_button(bool visible);

  qreal font_point_size() const { return font_point_size_; }
  void set_font_point_size(qreal size) { font_point_size_ = size; }

 protected:
  void Paint(QPaintDevice* device);
  void Resize();

 private:
  void UpdateButtonGeometry();

 protected:
  QString hint_;

  bool has_clear_button_;
  QToolButton* clear_button_;
  QToolButton* reset_button_;

  int extra_right_padding_;
  bool draw_hint_;
  qreal font_point_size_;
  bool is_rtl_;
};

class LineEdit : public QLineEdit, public ExtendedEditor {
  Q_OBJECT
  Q_PROPERTY(QString hint READ hint WRITE set_hint)
  Q_PROPERTY(qreal font_point_size READ font_point_size WRITE
                 set_font_point_size)
  Q_PROPERTY(bool has_clear_button READ has_clear_button WRITE
                 set_clear_button)
  Q_PROPERTY(bool has_reset_button READ has_reset_button WRITE
                 set_reset_button)

 public:
  LineEdit(QWidget* parent = nullptr);

  // ExtendedEditor
  void set_focus() { QLineEdit::setFocus(); }
  QString text() const { return QLineEdit::text(); }
  void set_text(const QString& text) { QLineEdit::setText(text); }
  void set_enabled(bool enabled) { QLineEdit::setEnabled(enabled); }

 protected:
  void paintEvent(QPaintEvent*);
  void resizeEvent(QResizeEvent*);

 private:
  bool is_rtl() const { return is_rtl_; }
  void set_rtl(bool rtl) { is_rtl_ = rtl; }

 private slots:
  void text_changed(const QString& text);

signals:
  void Reset();
};

class TextEdit : public QPlainTextEdit, public ExtendedEditor {
  Q_OBJECT
  Q_PROPERTY(QString hint READ hint WRITE set_hint)
  Q_PROPERTY(bool has_clear_button READ has_clear_button WRITE
                 set_clear_button)
  Q_PROPERTY(bool has_reset_button READ has_reset_button WRITE
                 set_reset_button)

 public:
  TextEdit(QWidget* parent = nullptr);

  // ExtendedEditor
  void set_focus() { QPlainTextEdit::setFocus(); }
  QString text() const { return QPlainTextEdit::toPlainText(); }
  void set_text(const QString& text) { QPlainTextEdit::setPlainText(text); }
  void set_enabled(bool enabled) { QPlainTextEdit::setEnabled(enabled); }

 protected:
  void paintEvent(QPaintEvent*);
  void resizeEvent(QResizeEvent*);

signals:
  void Reset();
};

class SpinBox : public QSpinBox, public ExtendedEditor {
  Q_OBJECT
  Q_PROPERTY(QString hint READ hint WRITE set_hint)
  Q_PROPERTY(bool has_clear_button READ has_clear_button WRITE
                 set_clear_button)
  Q_PROPERTY(bool has_reset_button READ has_reset_button WRITE
                 set_reset_button)

 public:
  SpinBox(QWidget* parent = nullptr);

  // QSpinBox
  QString textFromValue(int val) const;

  // ExtendedEditor
  bool is_empty() const { return text().isEmpty() || text() == "0"; }
  void set_focus() { QSpinBox::setFocus(); }
  QString text() const { return QSpinBox::text(); }
  void set_text(const QString& text) { QSpinBox::setValue(text.toInt()); }
  void set_enabled(bool enabled) { QSpinBox::setEnabled(enabled); }

 protected:
  void paintEvent(QPaintEvent*);
  void resizeEvent(QResizeEvent*);

signals:
  void Reset();
};

#endif  // LINEEDIT_H