// Filename: frontend/js/components/BatchActions.js
import { apiFetchJson } from '../../services/api.js';

// 存储对 LogsPage 实例的引用
let logsPageInstance = null;

// 存储对 DOM 元素的引用
const elements = {
    batchActionsBtn: null,
    batchActionsMenu: null,
    deleteSelectedLogsBtn: null,
    clearAllLogsBtn: null,
};

// 用于处理页面点击以关闭菜单的绑定函数
const handleDocumentClick = (event) => {
    if (!elements.batchActionsMenu.contains(event.target) && !elements.batchActionsBtn.contains(event.target)) {
        closeBatchActionsMenu();
    }
};

// 关闭菜单的逻辑
function closeBatchActionsMenu() {
    if (elements.batchActionsMenu && !elements.batchActionsMenu.classList.contains('hidden')) {
        elements.batchActionsMenu.classList.remove('opacity-100', 'scale-100');
        elements.batchActionsMenu.classList.add('opacity-0', 'scale-95');
        setTimeout(() => {
            elements.batchActionsMenu.classList.add('hidden');
        }, 100);
        document.removeEventListener('click', handleDocumentClick);
    }
}

// 切换菜单显示/隐藏
function handleBatchActionsToggle(event) {
    event.stopPropagation();
    const isHidden = elements.batchActionsMenu.classList.contains('hidden');
    if (isHidden) {
        elements.batchActionsMenu.classList.remove('hidden', 'opacity-0', 'scale-95');
        elements.batchActionsMenu.classList.add('opacity-100', 'scale-100');
        document.addEventListener('click', handleDocumentClick);
    } else {
        closeBatchActionsMenu();
    }
}

// 处理删除选中日志的逻辑
async function handleDeleteSelectedLogs() {
    closeBatchActionsMenu();
    const selectedIds = Array.from(logsPageInstance.state.selectedLogIds);
    if (selectedIds.length === 0) return;

    Swal.fire({
        width: '20rem',
        backdrop: `rgba(0,0,0,0.5)`,
        heightAuto: false,
        customClass: { popup: `swal2-custom-style ${document.documentElement.classList.contains('dark') ? 'swal2-dark' : ''}` },
        title: '确认删除',
        text: `您确定要删除选定的 ${selectedIds.length} 条日志吗？此操作不可撤销。`,
        icon: 'warning',
        showCancelButton: true,
        confirmButtonText: '确认删除',
        cancelButtonText: '取消',
        reverseButtons: false,
        confirmButtonColor: '#ef4444',
        cancelButtonColor: '#6b7280',
        focusCancel: true,
        target: '#main-content-wrapper',
    }).then(async (result) => {
        if (result.isConfirmed) {
            try {
                const idsQueryString = selectedIds.join(',');
                const url = `/admin/logs?ids=${idsQueryString}`;
                const { success, message } = await apiFetchJson(url, { method: 'DELETE' });
                if (success) {
                    Swal.fire({ toast: true, position: 'top-end', icon: 'success', title: '删除成功', showConfirmButton: false, timer: 2000, timerProgressBar: true });
                    logsPageInstance.loadAndRenderLogs(); // 使用实例刷新列表
                } else {
                    throw new Error(message || '删除失败，请稍后重试。');
                }
            } catch (error) {
                Swal.fire({ icon: 'error', title: '操作失败', text: error.message, target: '#main-content-wrapper' });
            }
        }
    });
}

// [NEW] 处理清空所有日志的逻辑
async function handleClearAllLogs() {
    closeBatchActionsMenu();

    Swal.fire({
        width: '20rem',
        backdrop: `rgba(0,0,0,0.5)`,
        heightAuto: false,
        customClass: { popup: `swal2-custom-style ${document.documentElement.classList.contains('dark') ? 'swal2-dark' : ''}` },
        title: '危险操作确认',
        html: `您确定要<strong class="text-red-500">清空全部</strong>日志吗？<br>此操作不可撤销！`,
        icon: 'warning',
        showCancelButton: true,
        confirmButtonText: '确认清空',
        cancelButtonText: '取消',
        reverseButtons: false,
        confirmButtonColor: '#ef4444',
        cancelButtonColor: '#6b7280',
        focusCancel: true,
        target: '#main-content-wrapper',
    }).then(async (result) => {
        if (result.isConfirmed) {
            try {
                const url = `/admin/logs/all`; // 后端清空所有日志的接口
                const { success, message } = await apiFetchJson(url, { method: 'DELETE' });
                if (success) {
                    Swal.fire({ toast: true, position: 'top-end', icon: 'success', title: '清空成功', showConfirmButton: false, timer: 2000, timerProgressBar: true });
                    logsPageInstance.loadAndRenderLogs(); // 刷新列表
                } else {
                    throw new Error(message || '清空失败，请稍后重试。');
                }
            } catch (error) {
                Swal.fire({ icon: 'error', title: '操作失败', text: error.message, target: '#main-content-wrapper' });
            }
        }
    });
}


/**
 * 初始化批量操作模块
 * @param {object} logsPage - LogsPage 类的实例
 */
export function initBatchActions(logsPage) {
    logsPageInstance = logsPage;

    // 查询所有需要的 DOM 元素
    elements.batchActionsBtn = document.getElementById('batch-actions-btn');
    elements.batchActionsMenu = document.getElementById('batch-actions-menu');
    elements.deleteSelectedLogsBtn = document.getElementById('delete-selected-logs-btn');
    elements.clearAllLogsBtn = document.getElementById('clear-all-logs-btn'); // [NEW] 查询新按钮

    if (!elements.batchActionsBtn) return; // 如果找不到主按钮，则不进行任何操作

    // 绑定事件监听器
    elements.batchActionsBtn.addEventListener('click', handleBatchActionsToggle);
    if (elements.deleteSelectedLogsBtn) {
        elements.deleteSelectedLogsBtn.addEventListener('click', handleDeleteSelectedLogs);
    }
    if (elements.clearAllLogsBtn) { // [NEW] 绑定新按钮的事件
        elements.clearAllLogsBtn.addEventListener('click', handleClearAllLogs);
    }
}
// [NEW] - END