(() => {
    const CONFIG = {
        ACCESS_TRAININGS: [708057011, 919149341],
        CHAT_LINKS: {
            INSPIRATION: 'https://t.me/+Izbq3DDxxcgxNGUy',
            ANNOUNCEMENTS: 'https://t.me/+Ynw44rls2eFlOTcy'
        },
        SELECTORS: {
            BREADCRUMBS: ['.breadcrumbs', '.breadcrumb'],
            MAIN_PAGE: {
                TITLE: '.m-header__info-link--01',
                KURATOR: '.m-header__info-link--02',
                CONTAINER: '.m-header__info-links'
            },
            SUB_PAGE: {
                TITLE: '.n-header__side-btn--1',
                KURATOR: '.n-header__side-btn--2'
            },
            LEFT_BAR: '.gc-account-leftbar'
        },
        TEXTS: {
            INSPIRATION_CHAT: 'Чат Вдохновения Ашрам',
            KURATOR_QUESTION: 'Задать вопроc куратору'
        }
    };

    const dom = {
        exists(selector) {
            return !!document.querySelector(selector);
        },

        query(selector) {
            return document.querySelector(selector);
        },

        queryAll(selector) {
            return document.querySelectorAll(selector);
        },

        getTextContent(selector) {
            const element = this.query(selector);
            return element ? element.textContent.trim() : '';
        }
    };

    const checkTrainingAccess = (trainingsIds) => {
        const path = location.pathname;

        const isInPath = trainingsIds.some(id => path.includes(String(id)));
        if (isInPath) return true;

        for (const breadcrumbSelector of CONFIG.SELECTORS.BREADCRUMBS) {
            if (!dom.exists(breadcrumbSelector)) continue;

            const breadcrumbItems = dom.queryAll(`${breadcrumbSelector} a`);
            const hasAccess = Array.from(breadcrumbItems).some(item =>
                trainingsIds.some(id => item.href.includes(String(id)))
            );

            if (hasAccess) return true;
        }

        return false;
    };

    const generateChatHTML = (type = 'subpage') => {
        if (type === 'mainpage') {
            return `
                <div class="m-header__info-links">
                    <a class="m-header__info-link m-header__info-link--02 cst-icon--chat" 
                       href="${CONFIG.CHAT_LINKS.ANNOUNCEMENTS}" 
                       target="_blank">
                       Чат Анонсы и Вопросы Ашрам
                    </a>
                </div>
            `;
        }

        return `
            <a class="n-header__side-btn n-header__side-btn--2 cst-icon--chat" 
               href="${CONFIG.CHAT_LINKS.ANNOUNCEMENTS}" 
               target="_blank">
               Чат Анонсы и Вопросы Ашрам
            </a>
        `;
    };

    const replaceMainPageLinks = () => {
        const inspirationLink = dom.query(CONFIG.SELECTORS.MAIN_PAGE.TITLE);
        if (inspirationLink && dom.getTextContent(CONFIG.SELECTORS.MAIN_PAGE.TITLE) === CONFIG.TEXTS.INSPIRATION_CHAT) {
            inspirationLink.href = CONFIG.CHAT_LINKS.INSPIRATION;
        }

        const kuratorLink = dom.query(CONFIG.SELECTORS.MAIN_PAGE.KURATOR);
        if (kuratorLink) {
            if (dom.getTextContent(CONFIG.SELECTORS.MAIN_PAGE.KURATOR) === CONFIG.TEXTS.KURATOR_QUESTION) {
                kuratorLink.href = 'https://t.me/kurator_5element_bot?start=id607934369';
            }

            const container = kuratorLink.closest(CONFIG.SELECTORS.MAIN_PAGE.CONTAINER);
            if (container && !dom.query('.cst-icon--chat')) {
                container.insertAdjacentHTML('afterend', generateChatHTML('mainpage'));
            }
        }
    };

    const replaceSubPageLinks = () => {
        const inspirationLink = dom.query(CONFIG.SELECTORS.SUB_PAGE.TITLE);
        if (inspirationLink && dom.getTextContent(CONFIG.SELECTORS.SUB_PAGE.TITLE) === CONFIG.TEXTS.INSPIRATION_CHAT) {
            inspirationLink.href = CONFIG.CHAT_LINKS.INSPIRATION;
        }

        const kuratorLink = dom.query(CONFIG.SELECTORS.SUB_PAGE.KURATOR);
        if (kuratorLink) {
            if (dom.getTextContent(CONFIG.SELECTORS.SUB_PAGE.KURATOR) === CONFIG.TEXTS.KURATOR_QUESTION) {
                kuratorLink.href = 'https://t.me/kurator_5element_bot?start=id607934369';
            }

            if (!dom.query('.cst-icon--chat')) {
                kuratorLink.insertAdjacentHTML('afterend', generateChatHTML('subpage'));
            }
        }
    };

    const initializeReplacements = () => {
        replaceMainPageLinks();
        replaceSubPageLinks();
    };

    const hasAccess = checkTrainingAccess(CONFIG.ACCESS_TRAININGS);
    const isUser = true;

    if (isUser && hasAccess) {
        const checkInterval = setInterval(() => {
            if (dom.exists(CONFIG.SELECTORS.LEFT_BAR)) {
                initializeReplacements();
                clearInterval(checkInterval);
            }
        }, 10);
    }
})();