// 聊天室头像选择和个人设置模块，负责头像 API、密码修改、邮箱验证码和微信绑定操作。

let profileControlEventsBound = false;
let avatarPickerLoaded = false;

/**
 * 读取 CSRF Token。
 *
 * @returns {string}
 */
function csrf() {
    return document.querySelector('meta[name="csrf-token"]')?.content || "";
}

/**
 * 按 ID 获取 DOM 节点。
 *
 * @param {string} id
 * @returns {HTMLElement|null}
 */
function element(id) {
    return document.getElementById(id);
}

/**
 * 显示内联操作结果提示。
 *
 * @param {string} elementId
 * @param {string} message
 * @param {boolean} success
 * @returns {void}
 */
export function showInlineMsg(elementId, message, success) {
    const target = element(elementId);
    if (!target) {
        return;
    }

    target.style.background = success ? "#f0fdf4" : "#fff5f5";
    target.style.border = success ? "1px solid #86efac" : "1px solid #fecaca";
    target.style.color = success ? "#16a34a" : "#dc2626";
    target.textContent = message;
    target.style.display = "block";
    target.style.opacity = "1";
    target.style.transition = "opacity .4s";

    window.clearTimeout(target._hideTimer);
    target._hideTimer = window.setTimeout(() => {
        target.style.opacity = "0";
        window.setTimeout(() => {
            target.style.display = "none";
        }, 420);
    }, 3000);
}

/**
 * 打开头像选择弹窗并懒加载头像列表。
 *
 * @returns {void}
 */
export function openAvatarPicker() {
    const modal = element("avatar-picker-modal");
    if (!modal) {
        return;
    }

    modal.style.display = "flex";

    if (!avatarPickerLoaded) {
        void loadHeadfaces();
        avatarPickerLoaded = true;
    }
}

/**
 * 关闭头像选择弹窗。
 *
 * @returns {void}
 */
export function closeAvatarPicker() {
    const modal = element("avatar-picker-modal");
    if (modal) {
        modal.style.display = "none";
    }
}

/**
 * 打开个人设置弹窗。
 *
 * @returns {void}
 */
export function openSettingsModal() {
    const modal = element("settings-modal");
    if (modal) {
        modal.style.display = "flex";
    }
}

/**
 * 关闭个人设置弹窗。
 *
 * @returns {void}
 */
export function closeSettingsModal() {
    const modal = element("settings-modal");
    if (modal) {
        modal.style.display = "none";
    }
}

/**
 * 加载系统头像列表。
 *
 * @returns {Promise<void>}
 */
export async function loadHeadfaces() {
    const grid = element("avatar-grid");
    if (!grid) {
        return;
    }

    grid.innerHTML = '<div style="text-align:center;padding:20px;color:#999;">加载中...</div>';

    try {
        const response = await fetch("/headface/list", {
            headers: {
                Accept: "application/json",
            },
        });
        const data = await response.json();
        grid.innerHTML = "";

        for (const file of data.headfaces || []) {
            const image = document.createElement("img");
            image.src = `/images/headface/${file}`;
            image.className = "avatar-option";
            image.title = file;
            image.dataset.file = file;
            image.dataset.avatarFile = file;
            image.onerror = () => {
                image.style.display = "none";
            };
            grid.appendChild(image);
        }
    } catch (error) {
        grid.innerHTML = '<div style="text-align:center;padding:20px;color:red;">加载失败</div>';
    }
}

/**
 * 选中头像并刷新预览。
 *
 * @param {string} file
 * @param {HTMLElement} imageElement
 * @returns {void}
 */
export function selectAvatar(file, imageElement) {
    document.querySelectorAll(".avatar-option.selected").forEach((item) => item.classList.remove("selected"));
    imageElement.classList.add("selected");
    element("avatar-preview").src = `/images/headface/${file}`;
    element("avatar-selected-name").textContent = file;

    const saveButton = element("avatar-save-btn");
    saveButton.disabled = false;
    saveButton.dataset.file = file;
}

/**
 * 同步当前用户头像到在线名单。
 *
 * @param {string} headface
 * @returns {void}
 */
function syncOnlineUserHeadface(headface) {
    const username = window.chatContext?.username;

    // 在线名单仍由存量聊天室脚本维护为全局词法变量，这里保留同名访问兼容。
    if (username && typeof onlineUsers !== "undefined" && onlineUsers[username]) {
        onlineUsers[username].headface = headface;
    }

    if (typeof renderUserList === "function") {
        renderUserList();
    }
}

/**
 * 处理本地头像上传。
 *
 * @param {HTMLInputElement} input
 * @returns {Promise<void>}
 */
export async function handleAvatarUpload(input) {
    if (!input.files || !input.files[0]) {
        return;
    }

    const file = input.files[0];
    if (file.size > 2 * 1024 * 1024) {
        window.chatDialog?.alert?.("图片大小不可超过 2MB", "上传失败", "#cc4444");
        input.value = "";
        return;
    }

    const button = element("avatar-upload-btn");
    button.disabled = true;
    button.textContent = "上传中...";

    const formData = new FormData();
    formData.append("file", file);

    try {
        const response = await fetch("/headface/upload", {
            method: "POST",
            headers: {
                "X-CSRF-TOKEN": csrf(),
                "Accept": "application/json",
            },
            body: formData,
        });
        const data = await response.json();

        if (response.ok && data.status === "success") {
            window.chatDialog?.alert?.("自定义头像上传成功！", "提示", "#16a34a");
            const relativeUrl = `/${data.headface}`;
            element("avatar-preview").src = relativeUrl;
            element("avatar-selected-name").textContent = data.headface;
            syncOnlineUserHeadface(data.headface);
            document.querySelectorAll(".avatar-option.selected").forEach((item) => item.classList.remove("selected"));
            element("avatar-save-btn").disabled = true;
            closeAvatarPicker();
        } else {
            window.chatDialog?.alert?.(data.message || "上传失败", "操作失败", "#cc4444");
        }
    } catch (error) {
        window.chatDialog?.alert?.("网络错误，上传失败", "网络异常", "#cc4444");
    }

    button.disabled = false;
    button.textContent = "选择本地图片上传";
    input.value = "";
}

/**
 * 保存当前选中的系统头像。
 *
 * @returns {Promise<void>}
 */
export async function saveAvatar() {
    const button = element("avatar-save-btn");
    const file = button?.dataset.file || "";
    if (!file) {
        return;
    }

    button.disabled = true;
    button.textContent = "保存中...";

    try {
        const response = await fetch("/headface/change", {
            method: "POST",
            headers: {
                "Content-Type": "application/json",
                "X-CSRF-TOKEN": csrf(),
                "Accept": "application/json",
            },
            body: JSON.stringify({ headface: file }),
        });
        const data = await response.json();

        if (data.status === "success") {
            window.chatDialog?.alert?.("头像修改成功！", "提示", "#16a34a");
            syncOnlineUserHeadface(data.headface);
            closeAvatarPicker();
        } else {
            window.chatDialog?.alert?.(data.message || "修改失败", "操作失败", "#cc4444");
        }
    } catch (error) {
        window.chatDialog?.alert?.("网络错误", "网络异常", "#cc4444");
    }

    button.disabled = false;
    button.textContent = "确定更换";
}

/**
 * 保存登录密码。
 *
 * @returns {Promise<void>}
 */
export async function savePassword() {
    const oldPassword = element("set-old-pwd").value;
    const newPassword = element("set-new-pwd").value;
    const confirmPassword = element("set-new-pwd2").value;

    if (!oldPassword || !newPassword) {
        showInlineMsg("pwd-inline-msg", "⚠️ 请填写旧密码和新密码", false);
        return;
    }

    if (newPassword.length < 6) {
        showInlineMsg("pwd-inline-msg", "⚠️ 新密码最少6位！", false);
        return;
    }

    if (newPassword !== confirmPassword) {
        showInlineMsg("pwd-inline-msg", "⚠️ 两次输入的新密码不一致！", false);
        return;
    }

    try {
        const response = await fetch("/user/password", {
            method: "PUT",
            headers: {
                "X-CSRF-TOKEN": csrf(),
                "Content-Type": "application/json",
                "Accept": "application/json",
            },
            body: JSON.stringify({
                old_password: oldPassword,
                new_password: newPassword,
                new_password_confirmation: confirmPassword,
            }),
        });
        const data = await response.json();

        if (response.ok && data.status === "success") {
            showInlineMsg("pwd-inline-msg", "🔒 密码修改成功！", true);
            element("set-old-pwd").value = "";
            element("set-new-pwd").value = "";
            element("set-new-pwd2").value = "";
            return;
        }

        showInlineMsg("pwd-inline-msg", `❌ ${data.message || "请输入正确的旧密码"}`, false);
    } catch (error) {
        showInlineMsg("pwd-inline-msg", "🌐 网络异常，请稍后重试", false);
    }
}

/**
 * 保存个人资料和密保设置。
 *
 * @returns {Promise<void>}
 */
export async function saveSettings() {
    const profileData = {
        sex: element("set-sex").value,
        email: element("set-email").value,
        email_code: element("set-email-code")?.value || "",
        question: element("set-question").value,
        answer: element("set-answer").value,
        headface: window.chatContext?.profileHeadface || "1.gif",
        sign: window.chatContext?.profileSign || "",
    };

    try {
        const response = await fetch("/user/profile", {
            method: "PUT",
            headers: {
                "X-CSRF-TOKEN": csrf(),
                "Content-Type": "application/json",
                "Accept": "application/json",
            },
            body: JSON.stringify(profileData),
        });
        const data = await response.json();

        if (response.ok && data.status === "success") {
            showInlineMsg("settings-inline-msg", "✅ 资料保存成功！", true);
            return;
        }

        showInlineMsg("settings-inline-msg", `❌ ${data.message || "输入有误"}`, false);
    } catch (error) {
        showInlineMsg("settings-inline-msg", "🌐 网络异常，请稍后重试", false);
    }
}

/**
 * 发送邮箱验证码并启动按钮倒计时。
 *
 * @returns {Promise<void>}
 */
export async function sendEmailCode() {
    const email = element("set-email").value.trim();
    if (!email) {
        window.chatDialog?.alert?.("请先填写邮箱地址后再获取验证码！", "提示", "#d97706");
        return;
    }

    const button = element("btn-send-code");
    button.disabled = true;
    button.innerText = "正在发送...";
    button.style.opacity = "0.6";
    button.style.cursor = "not-allowed";

    try {
        const response = await fetch("/user/send-email-code", {
            method: "POST",
            headers: {
                "X-CSRF-TOKEN": csrf(),
                "Content-Type": "application/json",
                "Accept": "application/json",
            },
            body: JSON.stringify({ email }),
        });
        const data = await response.json();

        if (response.ok && data.status === "success") {
            window.chatDialog?.alert?.(data.message || "验证码发送成功，请前往邮箱查收！（有效期5分钟）", "发送成功", "#16a34a");
            startEmailCodeCountdown(button);
            return;
        }

        window.chatDialog?.alert?.(`发送失败：${data.message || "系统繁忙"}`, "发送失败", "#dc2626");
        resetEmailCodeButton(button);
    } catch (error) {
        window.chatDialog?.alert?.("网络异常，验证码发送失败，请稍后重试。", "错误", "#6b7280");
        resetEmailCodeButton(button);
    }
}

/**
 * 启动邮箱验证码按钮 60 秒倒计时。
 *
 * @param {HTMLButtonElement} button
 * @returns {void}
 */
function startEmailCodeCountdown(button) {
    let remaining = 60;
    button.innerText = `${remaining}s 后重试`;

    const timer = window.setInterval(() => {
        remaining -= 1;

        if (remaining <= 0) {
            window.clearInterval(timer);
            resetEmailCodeButton(button);
            return;
        }

        button.innerText = `${remaining}s 后重试`;
    }, 1000);
}

/**
 * 恢复邮箱验证码按钮状态。
 *
 * @param {HTMLButtonElement} button
 * @returns {void}
 */
function resetEmailCodeButton(button) {
    button.innerText = "获取验证码";
    button.disabled = false;
    button.style.opacity = "1";
    button.style.cursor = "pointer";
}

/**
 * 生成微信绑定验证码。
 *
 * @returns {Promise<void>}
 */
export async function generateWechatBindCode() {
    const button = element("btn-generate-bind-code");
    const input = element("wechat-bind-code");
    const tip = element("bind-code-tip");

    button.disabled = true;
    button.innerText = "生成中...";

    try {
        const response = await fetch("/user/generate-wechat-code", {
            method: "POST",
            headers: {
                "X-CSRF-TOKEN": csrf(),
                "Accept": "application/json",
            },
        });
        const data = await response.json();

        if (response.ok && data.status === "success") {
            input.value = data.code;
            tip.style.display = "block";
            element("btn-copy-bind-code").style.display = "inline-block";
            showInlineMsg("settings-inline-msg", "✅ 绑定代码生成成功，请在5分钟内发送给机器人", true);
        } else {
            showInlineMsg("settings-inline-msg", `❌ 生成失败：${data.message || "未知错误"}`, false);
        }
    } catch (error) {
        showInlineMsg("settings-inline-msg", "🌐 网络异常，请稍后重试", false);
    }

    button.disabled = false;
    button.innerText = "重新生成";
}

/**
 * 复制微信绑定验证码。
 *
 * @returns {void}
 */
export function copyWechatBindCode() {
    const input = element("wechat-bind-code");
    if (!input.value || input.value === "点击生成" || input.value === "生成中...") {
        return;
    }

    input.select();
    input.setSelectionRange(0, 99999);

    try {
        if (navigator.clipboard && window.isSecureContext) {
            void navigator.clipboard.writeText(input.value);
        } else {
            document.execCommand("copy");
        }

        const button = element("btn-copy-bind-code");
        const originalText = button.innerText;
        button.innerText = "已复制";
        window.setTimeout(() => {
            button.innerText = originalText;
        }, 2000);
    } catch (error) {
        showInlineMsg("settings-inline-msg", "❌ 复制失败，请手动复制", false);
    }
}

/**
 * 解除微信绑定。
 *
 * @returns {Promise<void>}
 */
export async function unbindWechat() {
    const confirmed = typeof window.chatDialog?.confirm === "function"
        ? await window.chatDialog.confirm("确定要解除微信绑定吗？解除后将无法接收任何机器人推送通知。", "解除微信绑定")
        : window.confirm("确定要解除微信绑定吗？解除后将无法接收任何机器人推送通知。");
    if (!confirmed) {
        return;
    }

    try {
        const response = await fetch("/user/unbind-wechat", {
            method: "POST",
            headers: {
                "X-CSRF-TOKEN": csrf(),
                "Accept": "application/json",
            },
        });
        const data = await response.json();

        if (response.ok && data.status === "success") {
            window.chatDialog?.alert?.("✅ 解绑成功！请刷新页面获取最新状态。", "提示", "#16a34a");
            window.location.reload();
            return;
        }

        window.chatDialog?.alert?.(`❌ 解绑失败：${data.message || "未知错误"}`, "操作失败", "#cc4444");
    } catch (error) {
        window.chatDialog?.alert?.("网络异常，解绑失败", "网络异常", "#cc4444");
    }
}

/**
 * 处理动态头像项选择。
 *
 * @param {Element} target
 * @returns {boolean}
 */
function handleAvatarOptionClick(target) {
    const avatarOption = target.closest("[data-avatar-file]");
    if (!(avatarOption instanceof HTMLElement)) {
        return false;
    }

    const file = avatarOption.getAttribute("data-avatar-file") || "";
    if (!file) {
        return false;
    }

    selectAvatar(file, avatarOption);

    return true;
}

/**
 * 挂载头像与设置全局兼容函数。
 *
 * @returns {void}
 */
function exposeProfileGlobals() {
    window.openAvatarPicker = openAvatarPicker;
    window.closeAvatarPicker = closeAvatarPicker;
    window.openSettingsModal = openSettingsModal;
    window.closeSettingsModal = closeSettingsModal;
    window.loadHeadfaces = loadHeadfaces;
    window.selectAvatar = selectAvatar;
    window.handleAvatarUpload = handleAvatarUpload;
    window.saveAvatar = saveAvatar;
    window.showInlineMsg = showInlineMsg;
    window.savePassword = savePassword;
    window.saveSettings = saveSettings;
    window.sendEmailCode = sendEmailCode;
    window.generateWechatBindCode = generateWechatBindCode;
    window.copyWechatBindCode = copyWechatBindCode;
    window.unbindWechat = unbindWechat;
}

/**
 * 绑定头像选择器和个人设置弹窗事件。
 *
 * @returns {void}
 */
export function bindProfileControls() {
    if (typeof window === "undefined") {
        return;
    }

    exposeProfileGlobals();

    if (profileControlEventsBound || typeof document === "undefined") {
        return;
    }

    profileControlEventsBound = true;
    document.addEventListener("click", (event) => {
        if (!(event.target instanceof Element)) {
            return;
        }

        if (event.target.closest("[data-avatar-picker-close]")) {
            event.preventDefault();
            closeAvatarPicker();
            return;
        }

        if (handleAvatarOptionClick(event.target)) {
            event.preventDefault();
            return;
        }

        if (event.target.closest("[data-avatar-save]")) {
            event.preventDefault();
            void saveAvatar();
            return;
        }

        if (event.target.closest("[data-avatar-upload-trigger]")) {
            event.preventDefault();
            element("avatar-upload-input")?.click();
            return;
        }

        if (event.target.closest("[data-settings-modal-close]")) {
            event.preventDefault();
            closeSettingsModal();
            return;
        }

        if (event.target.closest("[data-settings-save-password]")) {
            event.preventDefault();
            void savePassword();
            return;
        }

        if (event.target.closest("[data-settings-send-email-code]")) {
            event.preventDefault();
            void sendEmailCode();
            return;
        }

        if (event.target.closest("[data-settings-copy-wechat-code]")) {
            event.preventDefault();
            copyWechatBindCode();
            return;
        }

        if (event.target.closest("[data-settings-generate-wechat-code]")) {
            event.preventDefault();
            void generateWechatBindCode();
            return;
        }

        if (event.target.closest("[data-settings-unbind-wechat]")) {
            event.preventDefault();
            void unbindWechat();
            return;
        }

        if (event.target.closest("[data-settings-save-profile]")) {
            event.preventDefault();
            void saveSettings();
            return;
        }

        if (event.target.closest("[data-settings-modal-panel]")) {
            event.stopPropagation();
            return;
        }

        if (event.target.closest("[data-settings-modal-overlay]")) {
            closeSettingsModal();
        }
    });

    document.addEventListener("change", (event) => {
        if (!(event.target instanceof HTMLInputElement) || !event.target.matches("[data-avatar-upload-input]")) {
            return;
        }

        void handleAvatarUpload(event.target);
    });
}