document.addEventListener("DOMContentLoaded", async function () {
    const config = await loadMergedConfig();
    const loginConf = config.apiConfig.login || {};

    const loginUrl = loginConf.url;
    const reqParams = loginConf.requestParams || [];
    const resParams = loginConf.responseParams || [];

    // 提取字段名（带默认值）
    const reqUsernameField = reqParams.find(p => p.label.includes("用户名"))?.field || "username";
    const reqPasswordField = reqParams.find(p => p.label.includes("密码"))?.field || "password";
    const resTokenField = resParams.find(p => p.label.includes("Token"))?.field || "token";
    const resUsernameField = resParams.find(p => p.label.includes("用户名"))?.field || "username";

    // 自动填充 LLM 密码（与登录无关，只是附带存储）
    chrome.storage.local.get(["llmPassword"], function (res) {
        if (res.llmPassword) {
            document.getElementById("llmPassword").value = res.llmPassword;
        }
    });

    document.getElementById("loginBtn").addEventListener("click", doLogin);
    document.addEventListener("keydown", (e) => {
        if (e.key === "Enter") doLogin();
    });

    function doLogin() {
        const username = document.getElementById("username").value.trim();
        const password = document.getElementById("password").value.trim();
        const llmPassword = document.getElementById("llmPassword").value;
        const errorBox = document.getElementById("errorBox");
        errorBox.textContent = "";

        if (!username || !password) {
            errorBox.textContent = "请输入用户名和密码";
            return;
        }

        chrome.storage.local.set({ llmPassword });

        const requestBody = {};
        requestBody[reqUsernameField] = username;
        requestBody[reqPasswordField] = password;

        fetch(loginUrl, {
            method: "POST",
            headers: { "Content-Type": "application/json" },
            body: JSON.stringify(requestBody)
        })
            .then(res => res.json().then(data => ({ status: res.status, body: data })))
            .then(({ status, body }) => {
                const token = body[resTokenField];
                const returnedUser = body[resUsernameField] || username;

                if (status === 200 && token) {
                    chrome.storage.local.set({
                        token: token,
                        username: returnedUser,
                        loginAt: Date.now()
                    }, () => {
                        window.location.href = chrome.runtime.getURL("pages/popup.html");
                    });
                } else {
                    errorBox.textContent = body.message || "登录失败";
                }
            })
            .catch(() => {
                errorBox.textContent = "网络错误，请稍后重试";
            });
    }
});