var layer;
var laypage;

$(function () {
    // 初始化分页
    layui.use(['laypage', 'layer'], function () {
        layer = layui.layer;
        laypage = layui.laypage;

        // 初始化分页组件
        initPagination();
    });

    // 初始化图片预览功能
    initImagePreview();
});

/**
 * 初始化分页组件
 */
function initPagination() {
    laypage.render({
        elem: 'pagination',
        count: typeof totalItems !== 'undefined' ? totalItems : 0,
        limit: typeof pageSize !== 'undefined' ? pageSize : 6,
        curr: typeof currentPage !== 'undefined' ? currentPage : 1,
        layout: ['prev', 'page', 'next', 'refresh', 'skip'],
        jump: function (obj, first) {
            if (!first) {
                searchRecord(obj.curr, obj.limit)
            }
        }
    });
}

/**
 * 重新初始化分页组件
 * @param {number} totalCount - 总记录数
 * @param {number} pageSize - 每页大小
 * @param {number} currentPage - 当前页码
 */
function reinitPagination(totalCount, pageSize, currentPage) {
    laypage.render({
        elem: 'pagination',
        count: totalCount,
        limit: pageSize,
        curr: currentPage,
        layout: ['prev', 'page', 'next', 'refresh', 'skip'],
        jump: function (obj, first) {
            if (!first) {
                searchRecord(obj.curr, obj.limit)
            }
        }
    });
}

/**
 * 获取事件记录数据
 * @param {Object} params - 查询参数对象
 * @param {Function} callback - 回调函数
 */
function fetchEventInfoData(params, callback) {
    $.ajax({
        url: '../../security/eventInfo/pageData',
        type: 'POST',
        dataType: "json",
        contentType: "application/json;charset=UTF-8",
        data: JSON.stringify(params),
        success: function (response) {
            if (response.code === '0000') {
                callback(null, response.data);
            } else {
                callback(new Error(response.msg || '数据加载失败'), null);
            }
        },
        error: function (xhr, status, error) {
            callback(new Error('请求失败，请稍后重试'), null);
        }
    });
}

/**
 * 构建查询参数
 * @param {number} page - 页码
 * @param {number} size - 每页大小
 * @returns {Object} 查询参数对象
 */
function buildQueryParams(page, size) {
    var params = {
        page: page,
        limit: size
    };

    // 添加表单查询条件
    var form = document.getElementById('eventInfo-form');
    if (form) {
        var inputs = form.querySelectorAll('input[name], select[name]');
        inputs.forEach(function(input) {
            if (input.value) { // 只添加非空值
                params[input.name] = input.value;
            }
        });
    }

    return params;
}

/**
 * 更新事件画廊内容
 * @param {Array} records - 事件记录数据
 */
function updateGallery(records) {
    var container = document.getElementById('gallery-container');
    if (!container) return;

    // 清空现有内容
    container.innerHTML = '';

    if (!records || records.length === 0) {
        // 显示空状态
        container.innerHTML = `
            <div class="empty-state">
                <i class="fa-solid fa-bell-slash"></i>
                <h3>暂无事件记录</h3>
                <p>当前没有可展示的AI事件数据</p>
            </div>
        `;
        // 隐藏分页
        $('.pagination-container').hide();
        return;
    }

    // 显示分页
    $('.pagination-container').show();

    // 生成事件卡片
    var html = '';
    records.forEach(function(record) {
        html += `
            <div class="gallery-item">
                <img src="${record.imgName || '/logo-sm.png'}" alt="${record.id}"
                    data-url="${record.imgName || '/logo-sm.png'}" data-id="${record.id}"
                     class="gallery-img" onclick="showEventInfoPreview(this.getAttribute('data-url'))">
                <div class="gallery-info">
                    <div class="gallery-header">
                        <h3 class="gallery-title">${record.name || record.id}</h3>
                         <div class="gallery-tags">
                            <span class="tag-person">
                                <i class="layui-icon layui-icon-note"></i>
                                <span>汽车</span>
                            </span>
                            <span class="tag-person">
                                <i class="layui-icon layui-icon-note"></i>
                                <span>卡车</span>
                            </span>
                            <span class="tag-person">
                                <i class="layui-icon layui-icon-note"></i>
                                <span>翻斗车</span>
                            </span>
                        </div>
                    </div>
                    <div class="gallery-meta">
                        <div style="display: flex; align-items: center; gap: 15px;width: 100%">
                            <div class="meta-item" style="width: 50%">
                                <i class="layui-icon layui-icon-video"></i>
                                <span>${record.serId || ''}</span>
                            </div>
                            <div class="meta-item" style="width: 50%">
                                <i class="layui-icon layui-icon-date"></i>
                                <span>${formatDate(record.time)}</span>
                            </div>
                        </div>
                        <div class="meta-item" >
                            <i class="layui-icon layui-icon-home"></i>
                            <span>${record.deptId || ''}</span>
                        </div>
                        
                    </div>
                </div>
            </div>
        `;
    });

    container.innerHTML = html;
}

/**
 * 格式化日期
 * @param {string|number} date - 日期字符串或时间戳
 */
function formatDate(date) {
    if (!date) return '';
    var d = new Date(date);
    return d.getFullYear() + '-' +
        String(d.getMonth() + 1).padStart(2, '0') + '-' +
        String(d.getDate()).padStart(2, '0') + ' ' +
        String(d.getHours()).padStart(2, '0') + ':' +
        String(d.getMinutes()).padStart(2, '0') + ':' +
        String(d.getSeconds()).padStart(2, '0');
}

/**
 * 初始化图片预览功能
 */
function initImagePreview() {
    var preview = document.getElementById('imgPreview');
    var previewImg = document.getElementById('previewImg');
    var closeBtn = document.getElementById('closePreview');

    // 如果预览元素不存在，则不初始化
    if (!preview || !previewImg) {
        return;
    }

    // 关闭按钮点击事件
    if (closeBtn) {
        closeBtn.addEventListener('click', closePreview);
    }

    // 点击预览区域外关闭
    preview.addEventListener('click', function (e) {
        if (e.target === preview) {
            closePreview();
        }
    });

    // 键盘事件监听
    document.addEventListener('keydown', function (e) {
        if (e.key === 'Escape' && preview.style.display === 'flex') {
            closePreview();
        }
    });

    // 关闭预览函数
    function closePreview() {
        preview.style.display = 'none';
        previewImg.src = '';
    }
}

/**
 * 显示图片预览
 * @param {string} imgUrl 图片URL
 */
function showEventInfoPreview(imgUrl) {
    var preview = document.getElementById('imgPreview');
    var previewImg = document.getElementById('previewImg');

    if (preview && previewImg) {
        previewImg.src = imgUrl;
        preview.style.display = 'flex';
    }
}

/**
 * 读取事件记录
 */
function searchRecord(page , size) {
    var pageNumber = 1;
    var sizeNumber = 6;
    if (pageSize && pageSize > 0){
        size = pageSize;
    }

    if (size && size > 0){
        sizeNumber = size;
    }
    if (page && page > 0){
        pageNumber = page;
    }
    // 构造查询参数，从第一页开始
    var queryParams = buildQueryParams(pageNumber, sizeNumber);
    // 显示loading
    var loadingIndex = layer.load(1, {shade: [0.1, '#fff']});
    // 调用数据请求方法
    fetchEventInfoData(queryParams, function(error, data) {
        // 关闭loading
        layer.close(loadingIndex);
        if (error) {
            layer.msg(error.message);
            return;
        }

        // 更新页面数据
        updateGallery(data.records);
        // 重新初始化分页组件
        reinitPagination(data.total, data.size, data.current);
    });
}