{% extends "pydata_sphinx_theme/layout.html" %}

{# =========================================================
   ZC-Note Sphinx Theme
   ========================================================= #}

{% block extrahead %}
    {{ super() }}

    <script>
        (function() {
            // 获取侧边栏折叠开关
            const enableCollapse = "{{ theme_enable_collapse_sidebar | default('true') | string | lower }}";
            document.documentElement.setAttribute("data-zcnote-collapse", enableCollapse);

            // 获取隐藏 Header 配置
            const hideHeader = "{{ theme_hide_header | default('false') | string | lower }}";
            if (hideHeader === "true" || hideHeader === "1") {
                document.documentElement.setAttribute("data-hide-header", "true");
            }
        })();
    </script>
{% endblock extrahead %}


{% block docs_main %}
    <script>
        (function() {
            const scrollContainer = document.querySelector('.sidebar-primary-items__start');
            if (!scrollContainer) return;

            let storage;
            try { storage = window.sessionStorage; storage.setItem('__t', '1'); storage.removeItem('__t'); }
            catch (e) { storage = null; }

            const STORAGE_KEY = 'zcnote_sidebar_scroll_state';
            let targetScroll = null;

            const calculateTarget = () => {
                const saved = storage ? storage.getItem(STORAGE_KEY) : null;
                if (saved !== null) return parseInt(saved, 10);

                const currentItems = scrollContainer.querySelectorAll('.current');
                const activeItem = currentItems.length > 0 ? currentItems[currentItems.length - 1] : null;

                if (activeItem) {
                    const itemRect = activeItem.getBoundingClientRect();
                    const containerRect = scrollContainer.getBoundingClientRect();
                    const absoluteTop = (itemRect.top - containerRect.top) + scrollContainer.scrollTop;
                    return Math.max(0, absoluteTop - (containerRect.height / 3));
                }
                return 0;
            };

            const applyScroll = () => {
                if (scrollContainer.clientHeight === 0) return;

                if (targetScroll === null) targetScroll = calculateTarget();

                const originalBehavior = scrollContainer.style.scrollBehavior;
                scrollContainer.style.scrollBehavior = 'auto';
                scrollContainer.scrollTop = targetScroll;

                requestAnimationFrame(() => {
                    requestAnimationFrame(() => {
                        if (originalBehavior) scrollContainer.style.scrollBehavior = originalBehavior;
                        else scrollContainer.style.removeProperty('scroll-behavior');
                    });
                });
            };

            applyScroll();

            window.addEventListener('load', applyScroll);

            if (storage) {
                const saveScroll = () => {
                    if (scrollContainer.clientHeight > 0) {
                        const maxScroll = Math.max(0, scrollContainer.scrollHeight - scrollContainer.clientHeight);
                        const clampedScroll = Math.max(0, Math.min(scrollContainer.scrollTop, maxScroll));
                        storage.setItem(STORAGE_KEY, clampedScroll);
                    }
                };

                scrollContainer.addEventListener('click', function(e) {
                    if (e.target.closest('a')) saveScroll();
                });

                window.addEventListener('pagehide', saveScroll);
                window.addEventListener('beforeunload', saveScroll);

                window.addEventListener('pageshow', function(e) {
                    if (e.persisted) {
                        targetScroll = null;
                        applyScroll();
                    }
                });
            }
        })();
    </script>

    {{ super() }}
{% endblock docs_main %}