/*
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 "boxes/abstract_box.h"
#include "base/timer.h"
#include "ui/widgets/input_fields.h"
#include "mtproto/sender.h"

namespace Ui {
class InputField;
class FlatLabel;
} // namespace Ui

namespace Main {
class Session;
} // namespace Main

void ShowPhoneBannedError(const QString &phone);
[[nodiscard]] QString ExtractPhonePrefix(const QString &phone);

class SentCodeField : public Ui::InputField {
public:
	SentCodeField(
		QWidget *parent,
		const style::InputField &st,
		rpl::producer<QString> placeholder = nullptr,
		const QString &val = QString());

	void setAutoSubmit(int length, Fn<void()> submitCallback);
	void setChangedCallback(Fn<void()> changedCallback);
	QString getDigitsOnly() const;

private:
	void fix();

	// Flag for not calling onTextChanged() recursively.
	bool _fixing = false;

	int _autoSubmitLength = 0;
	Fn<void()> _submitCallback;
	Fn<void()> _changedCallback;

};

class SentCodeCall {
public:
	SentCodeCall(
		FnMut<void()> callCallback,
		Fn<void()> updateCallback);

	enum class State {
		Waiting,
		Calling,
		Called,
		Disabled,
	};
	struct Status {
		Status() {
		}
		Status(State state, int timeout) : state(state), timeout(timeout) {
		}

		State state = State::Disabled;
		int timeout = 0;
	};
	void setStatus(const Status &status);

	void callDone() {
		if (_status.state == State::Calling) {
			_status.state = State::Called;
			if (_update) {
				_update();
			}
		}
	}

	QString getText() const;

private:
	Status _status;
	base::Timer _timer;
	FnMut<void()> _call;
	Fn<void()> _update;

};

class ConfirmPhoneBox final : public Ui::BoxContent {
public:
	static void Start(
		not_null<Main::Session*> session,
		const QString &phone,
		const QString &hash);

	[[nodiscard]] Main::Session &session() const {
		return *_session;
	}

protected:
	void prepare() override;
	void setInnerFocus() override;

	void paintEvent(QPaintEvent *e) override;
	void resizeEvent(QResizeEvent *e) override;

private:
	ConfirmPhoneBox(
		QWidget*,
		not_null<Main::Session*> session,
		const QString &phone,
		const QString &hash);
	friend class object_ptr<ConfirmPhoneBox>;

	void sendCode();
	void sendCall();
	void checkPhoneAndHash();

	void sendCodeDone(const MTPauth_SentCode &result);
	void sendCodeFail(const MTP::Error &error);

	void callDone(const MTPauth_SentCode &result);

	void confirmDone(const MTPBool &result);
	void confirmFail(const MTP::Error &error);

	QString getPhone() const {
		return _phone;
	}
	void launch();

	void showError(const QString &error);

	const not_null<Main::Session*> _session;
	MTP::Sender _api;
	mtpRequestId _sendCodeRequestId = 0;

	// _hash from the link for account.sendConfirmPhoneCode call.
	// _phoneHash from auth.sentCode for account.confirmPhone call.
	QString _phone, _hash;
	QString _phoneHash;

	// If we receive the code length, we autosubmit _code field when enough symbols is typed.
	int _sentCodeLength = 0;

	mtpRequestId _checkCodeRequestId = 0;

	object_ptr<Ui::FlatLabel> _about = { nullptr };
	object_ptr<SentCodeField> _code = { nullptr };

	QString _error;
	SentCodeCall _call;

};