/* -------------------- 配置 -------------------- */
const sPayMallUrl = "http://127.0.0.1:8092";

/* -------------------- Cookie 工具 -------------------- */
function setCookie(name, value, days) {
    const date = new Date();
    date.setTime(date.getTime() + days * 24 * 60 * 60 * 1000);
    document.cookie = `${name}=${value};expires=${date.toUTCString()};path=/`;
}

/* -------------------- 主逻辑 -------------------- */
document.addEventListener("DOMContentLoaded", () => {

    // ① 异步加载 FingerprintJS 并计算浏览器指纹
    import("https://openfpcdn.io/fingerprintjs/v4")
        .then(FingerprintJS => FingerprintJS.load())
        .then(fp => fp.get())
        .then(result => {
            const sceneStr = result.visitorId.toUpperCase(); // 作为场景值

            /* ---------- 无痕登录按钮 ---------- */
            const stealthBtn = document.getElementById("stealth-login-btn");
            if (stealthBtn) {
                stealthBtn.addEventListener("click", () => {
                    /**
                     * 建议：此处可调用后端 “auto_login?sceneStr=xxx” 接口。
                     * 下面仅示例：直接把指纹写 cookie 后跳首页。
                     */
                    setCookie("loginToken", sceneStr, 30);
                    window.location.href = "./index.html";
                });
            }

            /* ---------- 获取二维码 ticket ---------- */
            fetch(`${sPayMallUrl}/api/v1/login/weixin_qrcode_ticket_scene?sceneStr=${sceneStr}`)
                .then(res => res.json())
                .then(data => {
                    if (data.code !== "0000") {
                        console.error("获取二维码 ticket 失败:", data.info);
                        return;
                    }

                    const ticket    = data.data;
                    const qrCodeImg = document.getElementById("qr-code-img");
                    qrCodeImg.src   = `https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=${ticket}`;
                    qrCodeImg.classList.remove("pulse");

                    // ② 开始轮询检查登录状态
                    const intervalId = setInterval(() => {
                        checkLoginStatus(ticket, sceneStr, intervalId);
                    }, 3000); // 每 3 秒检查一次
                })
                .catch(err => console.error("请求失败:", err));
        })
        .catch(err => console.error("FingerprintJS 加载失败:", err));
});

/* -------------------- 轮询检查登录 -------------------- */
function checkLoginStatus(ticket, sceneStr, intervalId) {
    fetch(`${sPayMallUrl}/api/v1/login/check_login_scene?ticket=${ticket}&sceneStr=${sceneStr}`)
        .then(res => res.json())
        .then(data => {
            if (data.code === "0000") {
                console.info("login success");
                clearInterval(intervalId);

                // 把后端返回的登录凭证写入 cookie（30 天）
                setCookie("loginToken", data.data, 30);

                // 跳转首页
                window.location.href = "./index.html";
            } else {
                console.info("login wait");
            }
        })
        .catch(err => console.error("请求失败:", err));
}