{% extends "base.html" %}

{% block content %}
{% include 'admin_nav.html' %}

<div class="admin-container">
    <div class="admin-content">
        <div class="admin-card full-width">
            <div class="card-header">
                <div class="header-left">
                    <i class="fas fa-th-large"></i>
                    <h3>应用管理 {% if search %}(搜索结果){% else %}(共{{ total_count }}个){% endif %}</h3>
                </div>
                <div class="header-actions">
                    <select id="category-filter" onchange="filterByCategory(this.value)" class="category-select">
                        <option value="">全部分类</option>
                        {% for category in categories %}
                        <option value="{{ category.id }}">{{ category.name }}</option>
                        {% endfor %}
                    </select>
                    <form class="search-form header-search" method="GET" action="{{ url_for('admin_apps') }}">
                        <div class="search-wrapper">
                            <i class="fas fa-search"></i>
                            <input type="text" name="search" placeholder="搜索应用..." value="{{ search }}">
                        </div>
                    </form>
                </div>
            </div>

            <div class="table-responsive">
                <table class="admin-table">
                    <thead>
                        <tr>
                            <th>图标</th>
                            <th>名称</th>
                            <th>分类</th>
                            <th>添加时间</th>
                            <th>操作</th>
                        </tr>
                    </thead>
                    <tbody id="apps-tbody">
                        <!-- 应用列表将通过JavaScript动态加载 -->
                    </tbody>
                </table>
                <!-- 加载指示器 -->
                <div id="loading-indicator" style="display: none; text-align: center; padding: 20px;">
                    <div class="spinner"></div>
                    <p>加载中...</p>
                </div>
                <!-- 加载更多按钮 -->
                <div id="load-more" style="text-align: center; padding: 20px;">
                    <button onclick="loadMoreApps()" class="btn-primary">
                        <i class="fas fa-sync"></i> 加载更多
                    </button>
                </div>
            </div>
        </div>
    </div>
</div>

<style>
.app-icon-container {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 300px;
}

.app-icon-small {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    position: relative;
    border-radius: 8px;
    overflow: hidden;
}

.app-icon-small img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.3s ease;
}

.icon-edit-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.app-icon-small:hover .icon-edit-overlay {
    opacity: 1;
}

.icon-edit-btn {
    color: white;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-edit-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.icon-url-input {
    flex: 1;
    min-width: 0;
    padding: 4px 8px;
    border: 1px solid #d2d2d7;
    border-radius: 4px;
    font-size: 12px;
    color: #666;
    transition: all 0.3s ease;
}

.icon-url-input:hover {
    border-color: #b2b2b2;
}

.icon-url-input:focus {
    border-color: #0066cc;
    outline: none;
    color: #333;
}

/* 调整表格第一列的宽度 */
.admin-table td:first-child {
    width: 320px;
    max-width: 320px;
}

.tablet-filter {
    display: flex;
    gap: 10px;
    align-items: center;
}

.tablet-filter input {
    padding: 8px 12px;
    border: 1px solid #d2d2d7;
    border-radius: 6px;
    font-size: 14px;
    min-width: 200px;
}

.tablet-filter input:focus {
    border-color: #007AFF;
    outline: none;
}

.tablet-filter button {
    padding: 8px 16px;
    background: #007AFF;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s ease;
}

.tablet-filter button:hover {
    background: #0056b3;
}

/* 添加成功提示样式 */
.filter-success {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    background: #4CAF50;
    color: white;
    border-radius: 4px;
    z-index: 1000;
    animation: fadeInOut 3s forwards;
}

@keyframes fadeInOut {
    0% { opacity: 0; transform: translateY(-20px); }
    10% { opacity: 1; transform: translateY(0); }
    90% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-20px); }
}

.filter-card {
    margin-bottom: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.filter-content {
    padding: 15px;
}

.filter-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.filter-group input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid #d2d2d7;
    border-radius: 6px;
    font-size: 14px;
    min-width: 300px;
}

.filter-group input:focus {
    border-color: #007AFF;
    outline: none;
}

.filter-group button {
    padding: 8px 16px;
    background: #007AFF;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.filter-group button:hover {
    background: #0056b3;
}

/* 批量筛选结果弹窗样式 */
.filter-result-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.filter-result-content {
    position: relative;
    background: white;
    margin: 10% auto;
    padding: 20px;
    width: 90%;
    max-width: 500px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.filter-result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.filter-result-header h3 {
    margin: 0;
    font-size: 18px;
}

.filter-result-close {
    font-size: 24px;
    cursor: pointer;
    color: #666;
}

.filter-result-list {
    max-height: 300px;
    overflow-y: auto;
}

.filter-result-item {
    padding: 8px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.filter-result-item.success {
    color: #4CAF50;
}

.filter-result-item.error {
    color: #f44336;
}
</style>

<div id="filterResultModal" class="filter-result-modal">
    <div class="filter-result-content">
        <div class="filter-result-header">
            <h3>筛选结果</h3>
            <span class="filter-result-close" onclick="closeFilterResultModal()">&times;</span>
        </div>
        <div id="filterResultList" class="filter-result-list">
            <!-- 结果将在这里动态显示 -->
        </div>
    </div>
</div>

<script>
let currentPage = 1;
const pageSize = 50;
let loading = false;
let hasMore = true;
let lastScrollPosition = 0;

// 初始加载
document.addEventListener('DOMContentLoaded', () => {
    loadApps();
});

// 滚动加载
document.addEventListener('scroll', () => {
    // 获取当前滚动位置
    const currentScroll = window.scrollY;
    
    // 只在向下滚动时检查是否需要加载更多
    if (currentScroll > lastScrollPosition) {
        const scrollThreshold = document.documentElement.scrollHeight - window.innerHeight - 200;
        if (currentScroll > scrollThreshold && !loading && hasMore) {
            loadMoreApps();
        }
    }
    
    // 更新上次滚动位置
    lastScrollPosition = currentScroll;
});

// 添加分类筛选函数
function filterByCategory(categoryId) {
    resetLoadState();
    const tbody = document.getElementById('apps-tbody');
    tbody.innerHTML = '';
    loadApps(1, categoryId);
}

// 修改loadApps函数以支持分类筛选
function loadApps(page = 1, categoryId = '') {
    if (loading || !hasMore) return;
    
    loading = true;
    const loadingIndicator = document.getElementById('loading-indicator');
    loadingIndicator.style.display = 'block';
    
    let url = "{{ url_for('admin_get_apps') }}?page=" + page + "&size=" + pageSize;
    if (categoryId) {
        url += "&category_id=" + categoryId;
    }
    {% if search %}
    url += "&search={{ search }}";
    {% endif %}
    
    fetch(url)
        .then(response => response.json())
        .then(data => {
            const tbody = document.getElementById('apps-tbody');
            
            if (page === 1) {
                tbody.innerHTML = '';
            }
            
            if (data.success) {
                data.apps.forEach(app => {
                    const tr = createAppRow(app);
                    tbody.appendChild(tr);
                });
                
                hasMore = data.has_more;
                document.getElementById('load-more').style.display = hasMore ? 'block' : 'none';
            } else {
                showNotification(data.error || '加载失败', 'error');
            }
        })
        .catch(error => {
            console.error('Error:', error);
            showNotification('加载失败，请重试', 'error');
        })
        .finally(() => {
            loading = false;
            loadingIndicator.style.display = 'none';
        });
}

function loadMoreApps() {
    if (loading || !hasMore) return;
    
    loading = true;
    const loadingIndicator = document.getElementById('loading-indicator');
    loadingIndicator.style.display = 'block';
    
    let url = "{{ url_for('admin_get_apps') }}?page=" + currentPage + "&size=" + pageSize;
    const categoryId = document.getElementById('category-filter')?.value;
    if (categoryId) {
        url += "&category_id=" + categoryId;
    }
    {% if search %}
    url += "&search={{ search }}";
    {% endif %}
    
    fetch(url)
        .then(response => response.json())
        .then(data => {
            const tbody = document.getElementById('apps-tbody');
            
            if (data.success) {
                data.apps.forEach(app => {
                    const tr = createAppRow(app);
                    tbody.appendChild(tr);
                });
                
                hasMore = data.has_more;
                if (hasMore) {
                    currentPage++;
                }
                document.getElementById('load-more').style.display = hasMore ? 'block' : 'none';
            } else {
                showNotification(data.error || '加载失败', 'error');
            }
        })
        .catch(error => {
            console.error('Error:', error);
            showNotification('加载失败，请重试', 'error');
        })
        .finally(() => {
            loading = false;
            loadingIndicator.style.display = 'none';
        });
}

function createAppRow(app) {
    const tr = document.createElement('tr');
    tr.dataset.appId = app.id;
    tr.innerHTML = `
        <td>
            <div class="app-icon-container">
                <div class="app-icon-small">
                    <img src="${app.icon_path.startsWith('http') ? app.icon_path : '/static/uploads/' + app.icon_path}" 
                         alt="${app.name}"
                         loading="lazy">
                    <div class="icon-edit-overlay">
                        <label class="icon-edit-btn" title="上传图标">
                            <i class="fas fa-camera"></i>
                            <input type="file" 
                                   class="icon-input" 
                                   accept="image/*"
                                   onchange="updateIcon(${app.id}, this)"
                                   style="display: none;">
                        </label>
                    </div>
                </div>
                <input type="url" 
                       value="${app.icon_path}"
                       placeholder="图标URL"
                       onchange="updateIconUrl(${app.id}, this.value)"
                       class="icon-url-input">
            </div>
        </td>
        <td>
            <form onsubmit="submitEditForm(event, this)" class="edit-form">
                <input type="hidden" name="app_id" value="${app.id}">
                <div class="edit-group">
                    <input type="text" name="name" value="${app.name}" required placeholder="应用名称">
                    <select name="category_id" required>
                        {% for category in categories %}
                        <option value="{{ category.id }}" 
                                ${app.category_id === {{ category.id }} ? 'selected' : ''}>
                            {{ category.name }}
                        </option>
                        {% endfor %}
                    </select>
                    <button type="submit" class="btn-edit" title="保存">
                        <i class="fas fa-save"></i>
                    </button>
                </div>
            </form>
        </td>
        <td>${app.category_name}</td>
        <td>${app.created_at}</td>
        <td>
            <div class="action-buttons">
                <a href="#" class="btn-delete" onclick="deleteApp(${app.id}); return false;">
                    <i class="fas fa-trash"></i>
                </a>
            </div>
        </td>
    `;
    return tr;
}

function submitEditForm(event, form) {
    event.preventDefault();
    const formData = new FormData(form);
    const appId = formData.get('app_id');
    
    fetch('/edit_app/' + appId, {
        method: 'POST',
        body: formData
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            // 显示成功消息
            showNotification('修改成功', 'success');
            
            // 更新分类名称显示
            const row = form.closest('tr');
            const categorySelect = form.querySelector('select[name="category_id"]');
            const selectedOption = categorySelect.options[categorySelect.selectedIndex];
            const categoryCell = row.querySelector('td:nth-child(3)'); // 第三列是分类显示列
            categoryCell.textContent = selectedOption.textContent;
        } else {
            showNotification(data.error || '修改失败', 'error');
        }
    })
    .catch(error => {
        console.error('Error:', error);
        showNotification('保存失败，请重试', 'error');
    });
}

function deleteApp(appId) {
    if (confirm('确定要删除这个应用吗？')) {
        fetch(`{{ url_for('delete_app', app_id=0) }}`.replace('0', appId), {
            method: 'POST'
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                showNotification(data.message, 'success');
                // 找到并移除对应的表格行
                const row = document.querySelector(`tr[data-app-id="${appId}"]`);
                if (row) {
                    row.remove();
                }
                // 保持当前滚动位置
                const currentScroll = window.scrollY;
                window.scrollTo(0, currentScroll);
            } else {
                showNotification(data.error, 'error');
            }
        })
        .catch(error => {
            showNotification('删除失败，请重试', 'error');
        });
    }
}

function updateIcon(appId, input) {
    if (!input.files || !input.files[0]) {
        showNotification('请选择图片文件', 'error');
        return;
    }
    
    // 检查文件类型
    const file = input.files[0];
    const allowedTypes = ['image/jpeg', 'image/png', 'image/gif'];
    if (!allowedTypes.includes(file.type)) {
        showNotification('不支持的文件类型，请选择 jpg、png 或 gif 格式的图片', 'error');
        return;
    }
    
    // 检查文件大小（限制为5MB）
    if (file.size > 5 * 1024 * 1024) {
        showNotification('文件太大，请选择5MB以下的图片', 'error');
        return;
    }
    
    const formData = new FormData();
    formData.append('icon', file);
    
    // 修改获取图片元素的方式
    const parentTd = input.closest('td');
    if (!parentTd) {
        showNotification('找不到图片元素', 'error');
        return;
    }
    const imgElement = parentTd.querySelector('.app-icon-small img');
    if (!imgElement) {
        showNotification('找不到图片元素', 'error');
        return;
    }
    
    const originalSrc = imgElement.src;
    imgElement.style.opacity = '0.5';
    
    console.log('开始上传图标:', {
        appId: appId,
        fileName: file.name,
        fileType: file.type,
        fileSize: file.size
    });
    
    fetch(`/admin/update_app_icon/${appId}`, {
        method: 'POST',
        body: formData,
        credentials: 'same-origin'
    })
    .then(response => {
        console.log('服务器响应:', response.status);
        if (!response.ok) {
            throw new Error(`HTTP error! status: ${response.status}`);
        }
        return response.json();
    })
    .then(data => {
        console.log('服务器响应数据:', data);
        if (data.success) {
            showNotification(data.message || '图标更新成功', 'success');
            const newSrc = '/static/uploads/' + data.icon_path;
            console.log('更新图标路径:', newSrc);
            imgElement.src = newSrc;
        } else {
            console.error('更新失败:', data.error);
            showNotification(data.error || '更新失败', 'error');
            imgElement.src = originalSrc;
        }
    })
    .catch(error => {
        console.error('请求错误:', error);
        showNotification(`更新失败: ${error.message}`, 'error');
        imgElement.src = originalSrc;
    })
    .finally(() => {
        imgElement.style.opacity = '1';
        input.value = '';
        console.log('图标更新操作完成');
    });
}

function showNotification(message, type = 'success') {
    console.log(`显示通知: ${type} - ${message}`);
    const notification = document.createElement('div');
    notification.className = `notification ${type}`;
    notification.textContent = message;
    
    notification.style.position = 'fixed';
    notification.style.bottom = '20px';
    notification.style.right = '20px';
    notification.style.padding = '10px 20px';
    notification.style.borderRadius = '4px';
    notification.style.backgroundColor = type === 'success' ? '#4CAF50' : '#f44336';
    notification.style.color = 'white';
    notification.style.zIndex = '1000';
    notification.style.opacity = '0';
    notification.style.transform = 'translateY(20px)';
    notification.style.transition = 'all 0.3s ease';
    
    document.body.appendChild(notification);
    
    setTimeout(() => {
        notification.style.opacity = '1';
        notification.style.transform = 'translateY(0)';
    }, 10);
    
    setTimeout(() => {
        notification.style.opacity = '0';
        notification.style.transform = 'translateY(20px)';
        setTimeout(() => notification.remove(), 300);
    }, 3000);
}

// 添加样式
const style = document.createElement('style');
style.textContent = `
    .app-icon-small {
        position: relative;
        width: 40px;
        height: 40px;
        border-radius: 8px;
        overflow: hidden;
        cursor: pointer;
    }

    .app-icon-small img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: all 0.3s ease;
    }

    .icon-edit-overlay {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        transition: all 0.3s ease;
    }

    .app-icon-small:hover .icon-edit-overlay {
        opacity: 1;
    }

    .app-icon-small:hover img {
        transform: scale(1.1);
    }

    .icon-edit-btn {
        color: white;
        cursor: pointer;
        padding: 5px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.2);
        transition: all 0.3s ease;
        width: 24px;
        height: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .icon-edit-btn:hover {
        background: rgba(255, 255, 255, 0.3);
        transform: scale(1.1);
    }

    .icon-edit-btn i {
        font-size: 14px;
    }
`;
document.head.appendChild(style);

// 添加样式
const filterStyle = document.createElement('style');
filterStyle.textContent = `
    .header-actions {
        display: flex;
        gap: 15px;
        align-items: center;
    }

    .category-select {
        padding: 8px 12px;
        border: 1px solid #d2d2d7;
        border-radius: 6px;
        font-size: 14px;
        color: #1d1d1f;
        background-color: white;
        cursor: pointer;
        transition: all 0.3s ease;
    }

    .category-select:hover {
        border-color: #0066cc;
    }

    .category-select:focus {
        outline: none;
        border-color: #0066cc;
        box-shadow: 0 0 0 2px rgba(0,102,204,0.1);
    }
`;
document.head.appendChild(filterStyle);

function updateIconUrl(appId, newUrl) {
    if (!newUrl) return;
    
    if (!newUrl.startsWith('http://') && !newUrl.startsWith('https://')) {
        showNotification('请输入有效的URL地址', 'error');
        return;
    }
    
    // 显示加载状态
    const tr = document.querySelector(`tr[data-app-id="${appId}"]`);
    const input = tr ? tr.querySelector('.icon-url-input') : null;
    const img = tr ? tr.querySelector('.app-icon-small img') : null;
    const originalUrl = img ? img.src : '';
    
    if (input) input.disabled = true;
    if (img) img.style.opacity = '0.5';
    
    // 添加错误处理和重试逻辑
    const updateRequest = async (retryCount = 0) => {
        try {
            // 修改为使用 url_for 生成的完整路径
            const response = await fetch("{{ url_for('update_app_icon_url', app_id=0) }}".replace('0', appId), {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'X-Requested-With': 'XMLHttpRequest'
                },
                body: JSON.stringify({ icon_url: newUrl }),
                credentials: 'same-origin'
            });

            // 检查响应状态
            if (!response.ok) {
                // 如果是 401 未授权，重定向到登录页面
                if (response.status === 401) {
                    window.location.href = "{{ url_for('login') }}";
                    return;
                }
                
                // 如果是 429 请求过多，等待后重试
                if (response.status === 429 && retryCount < 3) {
                    await new Promise(resolve => setTimeout(resolve, 1000));
                    return updateRequest(retryCount + 1);
                }
                
                throw new Error(`HTTP error! status: ${response.status}`);
            }

            const data = await response.json();
            
            if (data.success) {
                showNotification('图标链接更新成功', 'success');
                if (img) {
                    img.src = newUrl;
                    img.style.opacity = '1';
                }
            } else {
                throw new Error(data.error || '更新失败');
            }
        } catch (error) {
            console.error('Error:', error);
            showNotification(error.message || '更新失败，请重试', 'error');
            
            // 恢复原始状态
            if (img) {
                img.src = originalUrl;
                img.style.opacity = '1';
            }
            if (input) {
                input.value = originalUrl;
            }
        } finally {
            if (input) input.disabled = false;
            if (img) img.style.opacity = '1';
        }
    };

    // 开始更新请求
    updateRequest();
}

// 修改防抖函数
const debounce = (func, wait) => {
    let timeout;
    return (...args) => {
        clearTimeout(timeout);
        return new Promise(resolve => {
            timeout = setTimeout(() => {
                resolve(func.apply(this, args));
            }, wait);
        });
    };
};

// 使用防抖包装更新函数
const debouncedUpdateIconUrl = debounce(updateIconUrl, 500);

// 修改事件监听器
document.addEventListener('DOMContentLoaded', () => {
    const tbody = document.getElementById('apps-tbody');
    
    // 使事件委托处理图标URL输入
    tbody.addEventListener('change', async (e) => {
        if (e.target.classList.contains('icon-url-input')) {
            const tr = e.target.closest('tr');
            const appId = tr.dataset.appId;
            if (appId) {
                try {
                    await debouncedUpdateIconUrl(appId, e.target.value);
                } catch (error) {
                    console.error('Error:', error);
                    showNotification('更新失败，请重试', 'error');
                }
            }
        }
    });
});

// 添加通知函数
function showNotification(message, type = 'success') {
    const notification = document.createElement('div');
    notification.className = `notification ${type}`;
    notification.textContent = message;
    
    Object.assign(notification.style, {
        position: 'fixed',
        bottom: '20px',
        right: '20px',
        padding: '10px 20px',
        borderRadius: '4px',
        backgroundColor: type === 'success' ? '#4CAF50' : '#f44336',
        color: 'white',
        zIndex: '1000',
        opacity: '0',
        transform: 'translateY(20px)',
        transition: 'all 0.3s ease'
    });
    
    document.body.appendChild(notification);
    
    // 触发重排以应用过渡效果
    notification.offsetHeight;
    
    notification.style.opacity = '1';
    notification.style.transform = 'translateY(0)';
    
    setTimeout(() => {
        notification.style.opacity = '0';
        notification.style.transform = 'translateY(20px)';
        setTimeout(() => notification.remove(), 300);
    }, 3000);
}

// 添加回车键触发筛选
document.getElementById('tabletAppFilter').addEventListener('keypress', function(e) {
    if (e.key === 'Enter') {
        e.preventDefault();
        filterTabletApps();
    }
});

// 点击弹窗外部关闭
window.onclick = function(event) {
    const modal = document.getElementById('filterResultModal');
    if (event.target == modal) {
        modal.style.display = 'none';
    }
}

// 添加重置加载状态的函数
function resetLoadState() {
    currentPage = 1;
    hasMore = true;
    loading = false;
    lastScrollPosition = 0;
}
</script>
{% endblock %}