/*
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
*/
#include "api/api_cloud_password.h"

#include "base/random.h"
#include "core/core_cloud_password.h"
#include "apiwrap.h"

namespace Api {

// #TODO Add ability to set recovery email separately.

CloudPassword::CloudPassword(not_null<ApiWrap*> api)
: _api(&api->instance()) {
}

void CloudPassword::reload() {
	if (_requestId) {
		return;
	}
	_requestId = _api.request(MTPaccount_GetPassword(
	)).done([=](const MTPaccount_Password &result) {
		_requestId = 0;
		result.match([&](const MTPDaccount_password &data) {
			base::RandomAddSeed(bytes::make_span(data.vsecure_random().v));
			if (_state) {
				*_state = Core::ParseCloudPasswordState(data);
			} else {
				_state = std::make_unique<Core::CloudPasswordState>(
					Core::ParseCloudPasswordState(data));
			}
			_stateChanges.fire_copy(*_state);
		});
	}).fail([=] {
		_requestId = 0;
	}).send();
}

void CloudPassword::clearUnconfirmedPassword() {
	_requestId = _api.request(MTPaccount_CancelPasswordEmail(
	)).done([=] {
		_requestId = 0;
		reload();
	}).fail([=] {
		_requestId = 0;
		reload();
	}).send();
}

rpl::producer<Core::CloudPasswordState> CloudPassword::state() const {
	return _state
		? _stateChanges.events_starting_with_copy(*_state)
		: (_stateChanges.events() | rpl::type_erased());
}

auto CloudPassword::stateCurrent() const
-> std::optional<Core::CloudPasswordState> {
	return _state
		? base::make_optional(*_state)
		: std::nullopt;
}

auto CloudPassword::resetPassword()
-> rpl::producer<CloudPassword::ResetRetryDate, QString> {
	return [=](auto consumer) {
		_api.request(MTPaccount_ResetPassword(
		)).done([=](const MTPaccount_ResetPasswordResult &result) {
			result.match([&](const MTPDaccount_resetPasswordOk &data) {
				reload();
			}, [&](const MTPDaccount_resetPasswordRequestedWait &data) {
				if (!_state) {
					reload();
					return;
				}
				const auto until = data.vuntil_date().v;
				if (_state->pendingResetDate != until) {
					_state->pendingResetDate = until;
					_stateChanges.fire_copy(*_state);
				}
			}, [&](const MTPDaccount_resetPasswordFailedWait &data) {
				consumer.put_next_copy(data.vretry_date().v);
			});
			consumer.put_done();
		}).fail([=](const MTP::Error &error) {
			consumer.put_error_copy(error.type());
		}).send();

		return rpl::lifetime();
	};
}

auto CloudPassword::cancelResetPassword()
-> rpl::producer<rpl::no_value, QString> {
	return [=](auto consumer) {
		_api.request(MTPaccount_DeclinePasswordReset(
		)).done([=] {
			reload();
			consumer.put_done();
		}).fail([=](const MTP::Error &error) {
			consumer.put_error_copy(error.type());
		}).send();

		return rpl::lifetime();
	};
}

} // namespace Api