TelegaBot/src/main/java/ru/cathub/telegabot/service/impl/BookManageServiceImpl.java

package ru.cathub.telegabot.service.impl;

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import ru.cathub.telegabot.bot.KeyboardHelper;
import ru.cathub.telegabot.model.BookEditStateCache;
import ru.cathub.telegabot.model.BookCreationCache;
import ru.cathub.telegabot.model.*;
import ru.cathub.telegabot.repository.BookRepository;
import ru.cathub.telegabot.repository.UserRepository;
import ru.cathub.telegabot.service.*;
import ru.cathub.telegabot.utils.Constants;

import java.util.Optional;

import static ru.cathub.telegabot.bot.KeyboardHelper.*;
import static ru.cathub.telegabot.utils.Constants.*;


@Service
@RequiredArgsConstructor
@Slf4j
public class BookManageServiceImpl implements BookManageService {

    private final BookCreationService bookCreationService;
    private final BookEditingService bookEditingService;
    private final BookListingService bookListingService;
    private final UserRepository userRepository;
    private final BookCacheService bookCacheService;
    private final BookRepository bookRepository;
    private final TelegramClientService telegramClientService;



    @Override
    public void processBookInput(BotUser user, String text) {
        Long userId = user.getId();
        BookCreationCache creationCache = bookCacheService.getCache(userId);
        BookEditStateCache editCache = bookCacheService.getBookEditCache(userId);

        switch (text) {
            case LIST_BOOKS:
                bookCacheService.clearBookListCache(userId);
                bookCacheService.clearBookEditCache(userId);
                bookListingService.showPaginatedBookList(user, 0, null, false);
                break;
            case EDIT_BOOKS:
                bookCacheService.clearBookListCache(userId);
                bookCacheService.clearBookEditCache(userId);
                bookListingService.showPaginatedBookList(user, 0, null, true);
                //startBookEditing(user);
                break;
            case ADD_BOOK:
                bookCacheService.clearBookListCache(userId);
                bookCacheService.clearBookEditCache(userId);
                bookCreationService.handleNewAddRequest(user, text);
                break;
            default:
                if (creationCache != null && creationCache.getCreationState() != null) {
                    // Handle book creation states
                    bookCreationService.handleExistingAddCache(user, text);
                } else if (editCache != null && editCache.getBookEditState() != BookEditStateCache.BookEditState.NONE) {
                    // Handle book editing states
                    switch (editCache.getBookEditState()) {
                        case SELECTING_BOOK -> 
                            bookCreationService.handleNewAddRequest(user, text);
                        case EDITING_TITLE -> 
                            bookEditingService.updateBookTitle(user, text);
                        case EDITING_AUTHOR -> 
                            bookEditingService.updateBookAuthor(user, text);
                        case EDITING_RATING -> 
                            bookEditingService.updateBookRating(user, text);
                        case EDITING_DATE ->
                            bookEditingService.updateBookDate(user, text);
                        case CHOOSING_FIELD -> {} // No action needed
                    }
                }
        }

    }

    @Override
    public void handleStartMessage(BotUser botUser) {
        botUser.setWorkingMode(BotUser.WorkingMode.BOOK);
        userRepository.save(botUser);
        telegramClientService.sendMessageWithMarkdown(botUser, getWelcomeMessage(), KeyboardHelper.getBookMenuKeyboard());
    }


    @Override
    public void processBookQuery(BotUser user, String text) {
        if (text.startsWith("BOOK_PAGE_")) {
            int page = Integer.parseInt(text.split("_")[2]);
            var bookListCache = bookCacheService.getBookListState(user.getId());
            if (bookListCache.getCurrentPage() != page) {
                bookListCache.setCurrentPage(page);
                bookCacheService.updateBookListState(user.getId(), bookListCache);
            }
            var bookEditCache = bookCacheService.getBookEditCache(user.getId());
            bookListingService.showPaginatedBookList(user, page, bookListCache.getListMessageId(),bookEditCache != null);
        } else if (text.startsWith("BOOK_EDIT_ID_")) {
            Long bookId = Long.parseLong(text.split("_")[3]);
            bookEditingService.processBookSelection(user, bookId);
        } else {
            switch (text) {
                case "BOOK_EDIT_TITLE":
                    bookEditingService.handleEditTitle(user);
                    break;
                case "BOOK_EDIT_AUTHOR":
                    bookEditingService.handleEditAuthor(user);
                    break;
                case "BOOK_EDIT_RATING":
                    bookEditingService.handleEditRating(user);
                    break;
                case "BOOK_EDIT_DATE":
                    bookEditingService.handleEditDate(user);
                    break;
                case "BOOK_EDIT_CANCEL":
                    // cancelEditing(user);
                    break;
            }

        }
    }


    private String getWelcomeMessage() {
        return "✨ *Добро пожаловать в Бок Книжник\\!* 📚\n" +
                "_Ваш персональный помощник для управления библиотекой_\n\n" +
                "Чтобы начать, отправьте:\n" +
                "👉 `/start` — активировать бота и открыть меню\n\n" +
                "**С нами вы сможете:**\n" +
                "🔸 Добавлять книги с рейтингом\n" +
                "🔸 Просматривать свою коллекцию\n" +
                "🔸 Редактировать записи\n" +
                "🔸 Сортировать по рейтингу\n\n" +
                "📌 *Не забывайте: всегда можно вернуться в главное меню командой* `/start`\n\n" +
                "_📖 Давайте начнём ваше литературное путешествие\\!_";
    }
}