/*
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 "media/stories/media_stories_share.h"

#include "api/api_common.h"
#include "apiwrap.h"
#include "base/random.h"
#include "boxes/share_box.h"
#include "chat_helpers/compose/compose_show.h"
#include "data/data_chat_participant_status.h"
#include "data/data_forum_topic.h"
#include "data/data_histories.h"
#include "data/data_session.h"
#include "data/data_stories.h"
#include "data/data_thread.h"
#include "data/data_user.h"
#include "history/history.h"
#include "history/history_item_helpers.h" // GetErrorTextForSending.
#include "history/view/history_view_context_menu.h" // CopyStoryLink.
#include "lang/lang_keys.h"
#include "main/main_session.h"
#include "ui/boxes/confirm_box.h"
#include "ui/text/text_utilities.h"
#include "styles/style_calls.h"

namespace Media::Stories {

[[nodiscard]] object_ptr<Ui::BoxContent> PrepareShareBox(
		std::shared_ptr<ChatHelpers::Show> show,
		FullStoryId id,
		bool viewerStyle) {
	const auto session = &show->session();
	const auto resolve = [=] {
		const auto maybeStory = session->data().stories().lookup(id);
		return maybeStory ? maybeStory->get() : nullptr;
	};
	const auto story = resolve();
	if (!story) {
		return { nullptr };
	}
	const auto canCopyLink = story->hasDirectLink();

	auto copyCallback = [=] {
		const auto story = resolve();
		if (!story) {
			return;
		}
		if (story->hasDirectLink()) {
			using namespace HistoryView;
			CopyStoryLink(show, story->fullId());
		}
	};

	struct State {
		int requests = 0;
	};
	const auto state = std::make_shared<State>();
	auto filterCallback = [=](not_null<Data::Thread*> thread) {
		return Data::CanSend(thread, ChatRestriction::SendPhotos)
			&& Data::CanSend(thread, ChatRestriction::SendVideos);
	};
	auto copyLinkCallback = canCopyLink
		? Fn<void()>(std::move(copyCallback))
		: Fn<void()>();
	auto submitCallback = [=](
			std::vector<not_null<Data::Thread*>> &&result,
			TextWithTags &&comment,
			Api::SendOptions options,
			Data::ForwardOptions forwardOptions) {
		if (state->requests) {
			return; // Share clicked already.
		}
		const auto story = resolve();
		if (!story) {
			return;
		}
		const auto user = story->peer()->asUser();
		Assert(user != nullptr);

		const auto error = [&] {
			for (const auto thread : result) {
				const auto error = GetErrorTextForSending(
					thread,
					{ .story = story, .text = &comment });
				if (!error.isEmpty()) {
					return std::make_pair(error, thread);
				}
			}
			return std::make_pair(QString(), result.front());
		}();
		if (!error.first.isEmpty()) {
			auto text = TextWithEntities();
			if (result.size() > 1) {
				text.append(
					Ui::Text::Bold(error.second->chatListName())
				).append("\n\n");
			}
			text.append(error.first);
			show->showBox(Ui::MakeInformBox(text));
			return;
		}

		const auto api = &story->owner().session().api();
		auto &histories = story->owner().histories();
		for (const auto thread : result) {
			const auto action = Api::SendAction(thread, options);
			if (!comment.text.isEmpty()) {
				auto message = Api::MessageToSend(action);
				message.textWithTags = comment;
				message.action.clearDraft = false;
				api->sendMessage(std::move(message));
			}
			const auto peer = thread->peer();
			const auto threadHistory = thread->owningHistory();
			const auto randomId = base::RandomValue<uint64>();
			auto sendFlags = MTPmessages_SendMedia::Flags(0);
			if (action.replyTo) {
				sendFlags |= MTPmessages_SendMedia::Flag::f_reply_to;
			}
			const auto silentPost = ShouldSendSilent(peer, action.options);
			if (silentPost) {
				sendFlags |= MTPmessages_SendMedia::Flag::f_silent;
			}
			const auto done = [=] {
				if (!--state->requests) {
					if (show->valid()) {
						show->showToast(tr::lng_share_done(tr::now));
						show->hideLayer();
					}
				}
			};
			histories.sendPreparedMessage(
				threadHistory,
				action.replyTo,
				randomId,
				Data::Histories::PrepareMessage<MTPmessages_SendMedia>(
					MTP_flags(sendFlags),
					peer->input,
					Data::Histories::ReplyToPlaceholder(),
					MTP_inputMediaStory(
						user->inputUser,
						MTP_int(id.story)),
					MTPstring(),
					MTP_long(randomId),
					MTPReplyMarkup(),
					MTPVector<MTPMessageEntity>(),
					MTP_int(action.options.scheduled),
					MTP_inputPeerEmpty()
				), [=](const MTPUpdates &result, const MTP::Response &response) {
				done();
			}, [=](const MTP::Error &error, const MTP::Response &response) {
				api->sendMessageFail(error, peer, randomId);
				done();
			});
			++state->requests;
		}
	};

	const auto viewerScheduleStyle = [&] {
		auto date = Ui::ChooseDateTimeStyleArgs();
		date.labelStyle = &st::groupCallBoxLabel;
		date.dateFieldStyle = &st::groupCallScheduleDateField;
		date.timeFieldStyle = &st::groupCallScheduleTimeField;
		date.separatorStyle = &st::callMuteButtonLabel;
		date.atStyle = &st::callMuteButtonLabel;
		date.calendarStyle = &st::groupCallCalendarColors;

		auto st = HistoryView::ScheduleBoxStyleArgs();
		st.topButtonStyle = &st::groupCallMenuToggle;
		st.popupMenuStyle = &st::groupCallPopupMenu;
		st.chooseDateTimeArgs = std::move(date);
		return st;
	};

	return Box<ShareBox>(ShareBox::Descriptor{
		.session = session,
		.copyCallback = std::move(copyLinkCallback),
		.submitCallback = std::move(submitCallback),
		.filterCallback = std::move(filterCallback),
		.stMultiSelect = viewerStyle ? &st::groupCallMultiSelect : nullptr,
		.stComment = viewerStyle ? &st::groupCallShareBoxComment : nullptr,
		.st = viewerStyle ? &st::groupCallShareBoxList : nullptr,
		.stLabel = viewerStyle ? &st::groupCallField : nullptr,
		.scheduleBoxStyle = (viewerStyle
			? viewerScheduleStyle()
			: HistoryView::ScheduleBoxStyleArgs()),
	});
}

} // namespace Media::Stories