(function () {
    var mask = document.getElementById("searchDialog");
    if (!mask) return;

    var headerForm = document.querySelector("form.header-search");
    var headerInput = headerForm
        ? headerForm.querySelector('input[name="q"]')
        : null;

    var input = mask.querySelector('[data-search-dialog-input]');
    var form = mask.querySelector('[data-search-dialog-form]');

    function isMobile() {
        try {
            return window.matchMedia("(max-width: 767px)").matches;
        } catch (e) {
            return false;
        }
    }

    function openDialog(initialValue) {
        if (initialValue != null && input) {
            input.value = String(initialValue || "");
        }
        mask.classList.add("is-open");
        mask.setAttribute("aria-hidden", "false");
        document.body.style.overflow = "hidden";

        requestAnimationFrame(function () {
            requestAnimationFrame(function () {
                if (input) input.focus();
                if (input && typeof input.select === "function") {
                    input.select();
                }
            });
        });
    }

    function closeDialog() {
        mask.classList.remove("is-open");
        mask.setAttribute("aria-hidden", "true");
        document.body.style.overflow = "";
    }

    window.openSearchDialog = openDialog;
    window.closeSearchDialog = closeDialog;

    if (mask) {
        mask.addEventListener("click", function (e) {
            if (e.target !== mask) return;
            closeDialog();
        });
    }

    document.addEventListener("keydown", function (e) {
        if (!mask.classList.contains("is-open")) return;
        if (e.key === "Escape") closeDialog();
    });

    // 移动端：点击头部搜索栏 → 打开搜索弹窗，而不是直接跳转
    if (headerForm) {
        headerForm.addEventListener("submit", function (e) {
            if (!isMobile()) return;
            e.preventDefault();
            var v = headerInput ? headerInput.value : "";
            openDialog(v);
        });

        headerForm.addEventListener("click", function (e) {
            if (!isMobile()) return;
            // 避免点到表单外或触发非预期行为
            e.preventDefault();
            e.stopPropagation();
            var v = headerInput ? headerInput.value : "";
            openDialog(v);
        });
    }

    // 提交时如果是空关键字，不跳转（避免触发接口报参数错误等情况）
    if (form) {
        form.addEventListener("submit", function (e) {
            var q = input ? String(input.value || "").trim() : "";
            if (!q) {
                e.preventDefault();
                if (input) input.focus();
            }
        });
    }
})();