(() => {
    const initMobileSheet = () => {
        const sheet = document.querySelector("[data-mobile-sheet]");
        const navStack = document.querySelector("[data-mobile-nav-stack]");
        const openButtons = document.querySelectorAll("[data-mobile-sheet-open]");
        if (!sheet || !navStack || !openButtons.length) return;

        const closeSheet = () => {
            sheet.hidden = true;
            navStack.classList.remove("is-open");
            openButtons.forEach((button) => button.classList.remove("is-open"));
        };

        const openSheet = () => {
            sheet.hidden = false;
            navStack.classList.add("is-open");
            openButtons.forEach((button) => button.classList.add("is-open"));
        };

        const toggleSheet = () => {
            if (sheet.hidden) {
                openSheet();
            } else {
                closeSheet();
            }
        };

        openButtons.forEach((button) => {
            button.addEventListener("click", toggleSheet);
        });

        document.addEventListener("keydown", (event) => {
            if (event.key === "Escape") {
                closeSheet();
            }
        });

        sheet.querySelectorAll("a").forEach((link) => {
            link.addEventListener("click", closeSheet);
        });
        sheet.querySelectorAll("button[data-theme-toggle]").forEach((button) => {
            button.addEventListener("click", closeSheet);
        });
    };

    const initFilterInputs = () => {
        document.querySelectorAll("[data-filter-input]").forEach((input) => {
            const listSelector = input.getAttribute("data-filter-target");
            if (!listSelector) return;
            const container = document.querySelector(listSelector);
            if (!container) return;

            const items = Array.from(container.querySelectorAll("[data-filter-label]"));
            const filterGroups = Array.from(container.querySelectorAll("[data-filter-group]"));
            const resultLimit = Number.parseInt(input.getAttribute("data-filter-limit") || "", 10);
            const hasLimit = Number.isFinite(resultLimit) && resultLimit > 0;

            const scoreItem = (label, term) => {
                if (label === term) return 0;
                if (label.startsWith(term)) return 1;
                if (label.split(/\s+/).some((part) => part.startsWith(term))) return 2;
                if (label.includes(term)) return 3;
                return 99;
            };

            const syncGroups = () => {
                filterGroups.forEach((group) => {
                    const visibleChildren = Array.from(group.querySelectorAll("[data-filter-label]")).some((item) => !item.hidden);
                    const card = group.closest(".component-group, .template-list-card, .panel, .planner-subsection");
                    if (card) {
                        card.hidden = !visibleChildren;
                    } else {
                        group.hidden = !visibleChildren;
                    }
                });
            };

            const applyFilter = () => {
                const term = input.value.trim().toLowerCase();
                if (!term) {
                    items.forEach((item, index) => {
                        item.hidden = hasLimit ? index >= resultLimit : false;
                    });
                    syncGroups();
                    return;
                }

                const rankedMatches = items
                    .map((item, index) => {
                        const haystack = (item.getAttribute("data-filter-label") || "").toLowerCase();
                        const score = scoreItem(haystack, term);
                        return { item, index, score, matches: score < 99 };
                    })
                    .filter((entry) => entry.matches)
                    .sort((left, right) => left.score - right.score || left.index - right.index);

                const allowedItems = new Set(
                    (hasLimit ? rankedMatches.slice(0, resultLimit) : rankedMatches).map((entry) => entry.item)
                );

                items.forEach((item) => {
                    item.hidden = !allowedItems.has(item);
                });
                syncGroups();
            };

            input.addEventListener("input", applyFilter);
            applyFilter();
        });
    };

    const initIosPullToRefresh = () => {
        const isAppleTouchDevice = /iP(ad|hone|od)/.test(navigator.userAgent)
            || (navigator.platform === "MacIntel" && navigator.maxTouchPoints > 1);
        if (!isAppleTouchDevice) return;

        let startY = 0;
        let maxPull = 0;
        let tracking = false;

        window.addEventListener("touchstart", (event) => {
            if (window.scrollY > 0) {
                tracking = false;
                return;
            }
            startY = event.touches[0].clientY;
            maxPull = 0;
            tracking = true;
        }, { passive: true });

        window.addEventListener("touchmove", (event) => {
            if (!tracking) return;
            const currentY = event.touches[0].clientY;
            maxPull = Math.max(maxPull, currentY - startY);
        }, { passive: true });

        window.addEventListener("touchend", () => {
            if (tracking && maxPull > 96 && window.scrollY <= 2) {
                window.location.reload();
            }
            tracking = false;
            maxPull = 0;
        }, { passive: true });

        document.addEventListener("gesturestart", (event) => {
            event.preventDefault();
        });

        document.addEventListener("touchmove", (event) => {
            if (event.touches.length > 1) {
                event.preventDefault();
            }
        }, { passive: false });
    };

    document.addEventListener("DOMContentLoaded", () => {
        initMobileSheet();
        initFilterInputs();
        initIosPullToRefresh();
    });
})();