(function() {
    'use strict';

    const API = window.location.origin;
    let userBadges = {};

    function isLoggedIn() {
        return sessionStorage.getItem('logged_in') === 'true';
    }

    function isAdmin() {
        return sessionStorage.getItem('is_admin') === 'true';
    }

    function saveLogin(username, isAdminUser, badge = null) {
        sessionStorage.setItem('logged_in', 'true');
        sessionStorage.setItem('username', username);
        sessionStorage.setItem('is_admin', isAdminUser ? 'true' : 'false');
        sessionStorage.setItem('user_badge', badge || '');
        sessionStorage.setItem('login_time', Date.now().toString());
    }

    function clearLogin() {
        sessionStorage.clear();
    }

    async function sha256(text) {
        try {
            const buf = new TextEncoder().encode(text);
            const hash = await crypto.subtle.digest('SHA-256', buf);
            const arr = Array.from(new Uint8Array(hash));
            return arr.map(b => b.toString(16).padStart(2, '0')).join('');
        } catch (error) {
            throw error;
        }
    }

    function showError(msg) {
        const el = document.getElementById('loginError');
        if (el) {
            el.textContent = '❌ ' + msg;
            el.classList.add('show');
            setTimeout(() => el.classList.remove('show'), 5000);
        }
    }

    function showSuccess(msg) {
        const el = document.getElementById('loginError');
        if (el) {
            el.innerHTML = msg;  // ✅ 使用 innerHTML 支持 HTML
            el.style.background = 'linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%)';
            el.style.color = '#065f46';
            el.style.borderColor = '#6ee7b7';
            el.classList.add('show');
            setTimeout(() => {
                el.classList.remove('show');
                el.style.background = '';
                el.style.color = '';
                el.style.borderColor = '';
            }, 2000);
        }
    }

    async function loadBadges() {
        try {
            const res = await fetch(`${API}/api/badges`);
            const data = await res.json();
            if (data.success) {
                userBadges = data.badges;
            }
        } catch (e) {
        }
    }

    function updateAdminUI() {
        const isAdminUser = isAdmin();
        
        const adminElements = document.querySelectorAll('.admin-only');
        
        adminElements.forEach(el => {
            if (isAdminUser) {
                el.style.display = '';
                el.style.visibility = 'visible';
                el.style.opacity = '1';
                el.classList.remove('hidden');
                
                if (el.classList.contains('tab-button')) {
                    el.style.display = 'block';
                }
            } else {
                el.style.display = 'none';
                el.style.visibility = 'hidden';
                el.style.opacity = '0';
                el.classList.add('hidden');
            }
        });
    }

    function showMainPage() {
        const login = document.getElementById('loginOverlay');
        const main = document.getElementById('mainContainer');
        
        if (!login || !main) {
            return;
        }
        
        login.classList.add('hide');
        main.style.display = 'flex';
        
        const username = sessionStorage.getItem('username') || '未知';
        const isAdminUser = isAdmin();
        const userBadge = sessionStorage.getItem('user_badge') || '';
        
        const userEl = document.getElementById('currentUser');
        if (userEl) {
            userEl.textContent = username;
        }
        
        const badge = document.getElementById('userTypeBadge');
        if (badge) {
            badge.innerHTML = '';
            badge.className = 'user-type-badge';
            
            if (isAdminUser) {
                badge.innerHTML = '👑 管理员';
                badge.className = 'user-type-badge admin';
            } else if (userBadge && userBadges[userBadge]) {
                const badgeInfo = userBadges[userBadge];
                
                badge.innerHTML = `
                    <span style="margin-right: 5px;">${badgeInfo.icon}</span>
                    <span>${badgeInfo.name}</span>
                `;
                badge.style.background = badgeInfo.gradient;
                badge.style.color = badgeInfo.color;
                badge.style.border = `2px solid ${badgeInfo.border}`;
                badge.style.boxShadow = `0 2px 8px ${badgeInfo.glow}`;
                badge.style.padding = '6px 14px';
                badge.style.borderRadius = '20px';
                badge.style.fontSize = '0.85em';
                badge.style.fontWeight = '700';
                badge.style.display = 'inline-flex';
                badge.style.alignItems = 'center';
            } else {
                badge.innerHTML = '👤 普通用户';
                badge.className = 'user-type-badge user';
            }
        }
        
        updateAdminUI();
        
        setTimeout(() => checkAPI(), 100);
        
        setTimeout(() => {
            window.dispatchEvent(new Event('user-logged-in'));
        }, 200);
    }

    function showLoginPage() {
        const login = document.getElementById('loginOverlay');
        const main = document.getElementById('mainContainer');
        
        if (login) login.classList.remove('hide');
        if (main) main.style.display = 'none';
    }

    async function checkAPI() {
        try {
            const start = Date.now();
            const res = await fetch('/health');
            const time = Date.now() - start;
            const data = await res.json();
            
            const status = document.getElementById('apiStatus');
            const timeEl = document.getElementById('responseTime');
            
            if (status) {
                if (data.status === 'running') {
                    status.textContent = '在线';
                    status.className = 'status-value online';
                } else {
                    status.textContent = '异常';
                    status.className = 'status-value loading';
                }
            }
            
            if (timeEl) timeEl.textContent = time + 'ms';
        } catch (e) {
            const status = document.getElementById('apiStatus');
            if (status) {
                status.textContent = '离线';
                status.className = 'status-value offline';
            }
        }
    }

    async function handleLogin(e) {
        e.preventDefault();
        
        const user = document.getElementById('usernameInput');
        const pass = document.getElementById('passwordInput');
        const btn = document.getElementById('loginBtn');
        
        if (!user || !pass || !btn) {
            showError('页面元素错误');
            return;
        }
        
        const username = user.value.trim();
        const password = pass.value;
        
        if (!username || !password) {
            showError('请输入用户名和密码');
            return;
        }
        
        btn.disabled = true;
        btn.innerHTML = '<div class="loading-spinner-large" style="width: 16px; height: 16px; border-width: 3px; margin-right: 8px; display: inline-block; vertical-align: middle;"></div> 验证中...';
        
        try {
            const hash = await sha256(password);
            
            const res = await fetch('/api/verify-password', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ username, password_hash: hash })
            });
            
            const data = await res.json();
            
            if (data.success) {
                const isAdminUser = data.user?.is_admin || false;
                const userBadge = data.user?.badge || null;
                
                // ✅ 保存用户数据到 sessionStorage
                if (data.user_data) {
                    const userDataKey = `user_data_${username}`;
                    sessionStorage.setItem(userDataKey, JSON.stringify(data.user_data));
                    console.log('✅ 用户数据已保存到 sessionStorage');
                }
                
                // 生成欢迎语
                let welcomeMsg = '✅ 登录成功！';
                
                
                if (isAdminUser) {
                    welcomeMsg += '<br><div style="margin-top: 10px; display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px; background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%); color: white; border-radius: 12px; font-weight: 700;">👑 欢迎管理员</div>';
                } else if (userBadge && userBadges[userBadge]) {
                    const badgeInfo = userBadges[userBadge];
                    welcomeMsg += `<br><div style="margin-top: 10px; display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px; background: ${badgeInfo.gradient}; color: ${badgeInfo.color}; border: 2px solid ${badgeInfo.border}; box-shadow: 0 2px 8px ${badgeInfo.glow}; border-radius: 12px; font-weight: 700;"><span>${badgeInfo.icon}</span><span>欢迎 ${badgeInfo.name}</span></div>`;
                } else {
                    welcomeMsg += '<br><div style="margin-top: 10px; color: #065f46; font-weight: 600;">👤 欢迎普通用户</div>';
                }
                
                showSuccess(welcomeMsg);
                
                saveLogin(username, isAdminUser, userBadge);
                
                await loadBadges();
                
                setTimeout(() => {
                    showMainPage();
                }, 1500);
                
            } else {
                showError('用户名或密码错误');
                btn.disabled = false;
                btn.textContent = '🚀 立即登录';
                pass.value = '';
            }
            
        } catch (err) {
            showError('登录失败: ' + err.message);
            btn.disabled = false;
            btn.textContent = '🚀 立即登录';
        }
    }

    function togglePassword() {
        const input = document.getElementById('passwordInput');
        const btn = document.getElementById('togglePasswordBtn');
        
        if (!input || !btn) return;
        
        if (input.type === 'password') {
            input.type = 'text';
            btn.textContent = '🙈';
        } else {
            input.type = 'password';
            btn.textContent = '👁️';
        }
    }

    function handleLogout() {
        if (confirm('确定要退出吗？')) {
            clearLogin();
            location.reload();
        }
    }

    async function init() {
        await loadBadges();
        
        if (isLoggedIn()) {
            setTimeout(() => showMainPage(), 100);
        } else {
            showLoginPage();
            setTimeout(() => {
                const user = document.getElementById('usernameInput');
                if (user) user.focus();
            }, 100);
        }
        
        const form = document.getElementById('loginForm');
        const toggleBtn = document.getElementById('togglePasswordBtn');
        const logoutBtn = document.getElementById('logoutBtn');
        
        if (form) {
            form.addEventListener('submit', handleLogin);
        }
        
        if (toggleBtn) {
            toggleBtn.addEventListener('click', togglePassword);
        }
        
        if (logoutBtn) {
            logoutBtn.addEventListener('click', handleLogout);
        }
    }

    window.isAdmin = isAdmin;
    window.updateAdminUI = updateAdminUI;

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }
})();