(function () {
    const input = document.getElementById("scan-input");
    const form = document.getElementById("scan-search-form");

    function showToast(message) {
        let stack = document.querySelector(".toast-stack");
        if (!stack) {
            stack = document.createElement("div");
            stack.className = "toast-stack";
            document.body.appendChild(stack);
        }

        const toast = document.createElement("div");
        toast.className = "toast";
        toast.textContent = message;
        stack.appendChild(toast);

        setTimeout(function () {
            toast.remove();
        }, 1600);
    }

    if (!input || !form) {
        return;
    }

    // Keep focus for barcode scanners that type and send Enter immediately.
    window.addEventListener("load", function () {
        input.focus();
    });

    document.addEventListener("keydown", function (event) {
        if (event.key === "Escape") {
            input.value = "";
            input.focus();
            showToast("已清空搜索词");
        }
    });

    form.addEventListener("submit", function () {
        if (input.value.trim()) {
            showToast("正在搜索...");
        }
    });
})();