/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.

For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#pragma once

#include "core/click_handler.h"

class TextClickHandler : public ClickHandler {
public:
	TextClickHandler(bool fullDisplayed = true)
	: _fullDisplayed(fullDisplayed) {
	}

	QString copyToClipboardText() const override {
		return url();
	}

	QString tooltip() const override {
		return _fullDisplayed ? QString() : readable();
	}

	void setFullDisplayed(bool full) {
		_fullDisplayed = full;
	}

protected:
	virtual QString url() const = 0;
	virtual QString readable() const {
		return url();
	}

	bool _fullDisplayed;

};

class UrlClickHandler : public TextClickHandler {
public:
	UrlClickHandler(const QString &url, bool fullDisplayed = true);

	QString copyToClipboardContextItemText() const override;

	QString dragText() const override {
		return url();
	}

	TextEntity getTextEntity() const override;

	static void Open(QString url, QVariant context = {});
	void onClick(ClickContext context) const override {
		const auto button = context.button;
		if (button == Qt::LeftButton || button == Qt::MiddleButton) {
			Open(url(), context.other);
		}
	}

protected:
	QString url() const override;
	QString readable() const override {
		return _readable;
	}

private:
	static bool isEmail(const QString &url) {
		int at = url.indexOf('@'), slash = url.indexOf('/');
		return ((at > 0) && (slash < 0 || slash > at));
	}
	bool isEmail() const {
		return isEmail(_originalUrl);
	}

	QString _originalUrl, _readable;

};

class HiddenUrlClickHandler : public UrlClickHandler {
public:
	HiddenUrlClickHandler(QString url) : UrlClickHandler(url, false) {
	}
	QString copyToClipboardContextItemText() const override {
		return (url().isEmpty() || url().startsWith(qstr("internal:")))
			? QString()
			: UrlClickHandler::copyToClipboardContextItemText();
	}

	static void Open(QString url, QVariant context = {});
	void onClick(ClickContext context) const override {
		const auto button = context.button;
		if (button == Qt::LeftButton || button == Qt::MiddleButton) {
			Open(url(), context.other);
		}
	}

	TextEntity getTextEntity() const override;

};

class BotGameUrlClickHandler : public UrlClickHandler {
public:
	BotGameUrlClickHandler(UserData *bot, QString url)
	: UrlClickHandler(url, false)
	, _bot(bot) {
	}
	void onClick(ClickContext context) const override;

private:
	UserData *_bot;

};

class MentionClickHandler : public TextClickHandler {
public:
	MentionClickHandler(const QString &tag) : _tag(tag) {
	}

	void onClick(ClickContext context) const override;

	QString dragText() const override {
		return _tag;
	}

	QString copyToClipboardContextItemText() const override;

	TextEntity getTextEntity() const override;

protected:
	QString url() const override {
		return _tag;
	}

private:
	QString _tag;

};

class MentionNameClickHandler : public ClickHandler {
public:
	MentionNameClickHandler(QString text, UserId userId, uint64 accessHash)
		: _text(text)
		, _userId(userId)
		, _accessHash(accessHash) {
	}

	void onClick(ClickContext context) const override;

	TextEntity getTextEntity() const override;

	QString tooltip() const override;

private:
	QString _text;
	UserId _userId;
	uint64 _accessHash;

};

class HashtagClickHandler : public TextClickHandler {
public:
	HashtagClickHandler(const QString &tag) : _tag(tag) {
	}

	void onClick(ClickContext context) const override;

	QString dragText() const override {
		return _tag;
	}

	QString copyToClipboardContextItemText() const override;

	TextEntity getTextEntity() const override;

protected:
	QString url() const override {
		return _tag;
	}

private:
	QString _tag;

};

class CashtagClickHandler : public TextClickHandler {
public:
	CashtagClickHandler(const QString &tag) : _tag(tag) {
	}

	void onClick(ClickContext context) const override;

	QString dragText() const override {
		return _tag;
	}

	QString copyToClipboardContextItemText() const override;

	TextEntity getTextEntity() const override;

protected:
	QString url() const override {
		return _tag;
	}

private:
	QString _tag;

};

class PeerData;
class UserData;
class BotCommandClickHandler : public TextClickHandler {
public:
	BotCommandClickHandler(const QString &cmd) : _cmd(cmd) {
	}

	void onClick(ClickContext context) const override;

	QString dragText() const override {
		return _cmd;
	}

	static void setPeerForCommand(PeerData *peer) {
		_peer = peer;
	}
	static void setBotForCommand(UserData *bot) {
		_bot = bot;
	}

	TextEntity getTextEntity() const override;

protected:
	QString url() const override {
		return _cmd;
	}
	static PeerData *peerForCommand() {
		return _peer;
	}
	static UserData *botForCommand() {
		return _bot;
	}

private:
	QString _cmd;

	static PeerData *_peer;
	static UserData *_bot;

};