/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org

Telegram Desktop 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.

It 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.

Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014 John Preston, https://desktop.telegram.org
*/
#pragma once

#include <QtWidgets/QLineEdit>
#include "style.h"
#include "animation.h"

class FlatInput : public QLineEdit, public Animated {
	Q_OBJECT

public:

	FlatInput(QWidget *parent, const style::flatInput &st, const QString &ph = QString(), const QString &val = QString());

	bool event(QEvent *e);
	void touchEvent(QTouchEvent *e);
	void paintEvent(QPaintEvent *e);
	void focusInEvent(QFocusEvent *e);
	void focusOutEvent(QFocusEvent *e);
	void keyPressEvent(QKeyEvent *e);
	void resizeEvent(QResizeEvent *e);

	void notaBene();

	void setPlaceholder(const QString &ph);
	void setPlaceholderFast(bool fast);
	void updatePlaceholder();
	const QString &placeholder() const;
	QRect placeholderRect() const;

	QRect getTextRect() const;

	bool animStep(float64 ms);

	QSize sizeHint() const;
	QSize minimumSizeHint() const;

	void customUpDown(bool isCustom);

public slots:

	void onTextChange(const QString &text);
	void onTextEdited();

	void onTouchTimer();

signals:

	void changed();
	void cancelled();
	void accepted();
	void focused();
	void blurred();

protected:

	virtual void correctValue(QKeyEvent *e, const QString &was);

	style::font phFont() {
		return _st.font;
	}

	void phPrepare(Painter &p);

private:

	QString _ph, _fullph, _oldtext;
	bool _fastph;
	QKeyEvent *_kev;

	bool _customUpDown;

	bool _phVisible;
	anim::ivalue a_phLeft;
	anim::fvalue a_phAlpha;
	anim::cvalue a_phColor, a_borderColor, a_bgColor;

	int _notingBene;
	style::flatInput _st;

	style::font _font;

	QTimer _touchTimer;
	bool _touchPress, _touchRightButton, _touchMove;
	QPoint _touchStart;
};

class CountryCodeInput : public FlatInput {
	Q_OBJECT

public:

	CountryCodeInput(QWidget *parent, const style::flatInput &st);

	public slots:

	void startErasing(QKeyEvent *e);
	void codeSelected(const QString &code);

signals:

	void codeChanged(const QString &code);
	void addedToNumber(const QString &added);

protected:

	void correctValue(QKeyEvent *e, const QString &was);

private:

	bool _nosignal;

};
//
//class InputField : public QTextEdit {
//	Q_OBJECT
//
//public:
//
//	InputField(QWidget *parent, const style::InputField &st, const QString &ph = QString(), const QString &val = QString());
//
//	bool event(QEvent *e);
//	void touchEvent(QTouchEvent *e);
//	void paintEvent(QPaintEvent *e);
//	void focusInEvent(QFocusEvent *e);
//	void focusOutEvent(QFocusEvent *e);
//	void keyPressEvent(QKeyEvent *e);
//	void resizeEvent(QResizeEvent *e);
//
//	void setError(bool error);
//
//	void updatePlaceholder();
//
//	QRect getTextRect() const;
//
//	bool placeholderFgStep(float64 ms);
//	bool placeholderShiftStep(float64 ms);
//	bool borderStep(float64 ms);
//
//	QSize sizeHint() const;
//	QSize minimumSizeHint() const;
//
//	void setCustomUpDown(bool customUpDown);
//
//public slots:
//
//	void onTextChange(const QString &text);
//	void onTextEdited();
//
//	void onTouchTimer();
//
//	void onDocumentContentsChange(int position, int charsRemoved, int charsAdded);
//	void onDocumentContentsChanged();
//
//	void onUndoAvailable(bool avail);
//	void onRedoAvailable(bool avail);
//
//signals:
//
//	void changed();
//	void cancelled();
//	void accepted();
//	void focused();
//	void blurred();
//
//protected:
//
//	virtual void correctValue(QKeyEvent *e, const QString &was);
//
//	void insertEmoji(EmojiPtr emoji, QTextCursor c);
//	TWidget *tparent() {
//		return qobject_cast<TWidget*>(parentWidget());
//	}
//	const TWidget *tparent() const {
//		return qobject_cast<const TWidget*>(parentWidget());
//	}
//	void enterEvent(QEvent *e) {
//		TWidget *p(tparent());
//		if (p) p->leaveToChildEvent(e);
//		return QTextEdit::enterEvent(e);
//	}
//	void leaveEvent(QEvent *e) {
//		TWidget *p(tparent());
//		if (p) p->enterFromChildEvent(e);
//		return QTextEdit::leaveEvent(e);
//	}
//
//	QVariant loadResource(int type, const QUrl &name);
//
//private:
//
//	QString _lastText;
//	QKeyEvent *_keyEvent;
//
//	bool _customUpDown;
//
//	QString _placeholder, _placeholderFull;
//	bool _placeholderVisible;
//	anim::ivalue a_placeholderLeft;
//	anim::fvalue a_placeholderOpacity;
//	anim::cvalue a_placeholderFg;
//	Animation _placeholderFgAnim, _placeholderShiftAnim;
//
//	anim::fvalue a_borderOpacityActive;
//	anim::cvalue a_borderFg;
//	Animation _borderAnim;
//
//	bool _focused, _error;
//
//	const style::InputField *_st;
//
//	QTimer _touchTimer;
//	bool _touchPress, _touchRightButton, _touchMove;
//	QPoint _touchStart;
//};


class InputField : public QTextEdit {
	Q_OBJECT

public:

	InputField(QWidget *parent, const style::InputField &st, const QString &ph = QString(), const QString &val = QString());

	bool viewportEvent(QEvent *e);
	void touchEvent(QTouchEvent *e);
	void paintEvent(QPaintEvent *e);
	void focusInEvent(QFocusEvent *e);
	void focusOutEvent(QFocusEvent *e);
	void keyPressEvent(QKeyEvent *e);
	void resizeEvent(QResizeEvent *e);

	const QString &getLastText() const;
	void updatePlaceholder();

	QRect getTextRect() const;
	int32 fakeMargin() const;

	bool placeholderFgStep(float64 ms);
	bool placeholderShiftStep(float64 ms);
	bool borderStep(float64 ms);

	QSize sizeHint() const;
	QSize minimumSizeHint() const;

	QString getText(int32 start = 0, int32 end = -1) const;
	bool hasText() const;

	bool isUndoAvailable() const;
	bool isRedoAvailable() const;

	QMimeData *createMimeDataFromSelection() const;

	void customUpDown(bool isCustom);

public slots:

	void onTouchTimer();

	void onDocumentContentsChange(int position, int charsRemoved, int charsAdded);
	void onDocumentContentsChanged();

	void onUndoAvailable(bool avail);
	void onRedoAvailable(bool avail);

signals:

	void changed();
	void submitted(bool ctrlShiftEnter);
	void cancelled();
	void tabbed();

	void focused();
	void blurred();

protected:

	virtual void correctValue(QKeyEvent *e, const QString &was);
	
	void insertEmoji(EmojiPtr emoji, QTextCursor c);
	TWidget *tparent() {
		return qobject_cast<TWidget*>(parentWidget());
	}
	const TWidget *tparent() const {
		return qobject_cast<const TWidget*>(parentWidget());
	}
	void enterEvent(QEvent *e) {
		TWidget *p(tparent());
		if (p) p->leaveToChildEvent(e);
		return QTextEdit::enterEvent(e);
	}
	void leaveEvent(QEvent *e) {
		TWidget *p(tparent());
		if (p) p->enterFromChildEvent(e);
		return QTextEdit::leaveEvent(e);
	}

	QVariant loadResource(int type, const QUrl &name);

private:

	void processDocumentContentsChange(int position, int charsAdded);

	QString _oldtext;

	QKeyEvent *_keyEvent;

	bool _undoAvailable, _redoAvailable;

	int32 _fakeMargin;
	
	bool _customUpDown;
	
	QString _placeholder, _placeholderFull;
	bool _placeholderVisible;
	anim::ivalue a_placeholderLeft;
	anim::fvalue a_placeholderOpacity;
	anim::cvalue a_placeholderFg;
	Animation _placeholderFgAnim, _placeholderShiftAnim;
	
	anim::fvalue a_borderOpacityActive;
	anim::cvalue a_borderFg;
	Animation _borderAnim;
	
	bool _focused, _error;
	
	const style::InputField *_st;

	QTimer _touchTimer;
	bool _touchPress, _touchRightButton, _touchMove;
	QPoint _touchStart;

	bool _replacingEmojis;
	typedef QPair<int, int> Insertion;
	typedef QList<Insertion> Insertions;
	Insertions _insertions;
};