/**
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* 案件数据全局Context
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* 提供案件数据的全局状态管理和localStorage持久化
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*/
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import React, { createContext, useContext, useState, useEffect } from 'react';
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import { message } from 'antd';
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import ProcessAPIService from '../services/ProcessAPIService';
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import { getMergedParams } from '../utils/urlParams';
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import { mockTimelineData } from '../mocks/timeline';
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import { getFallbackStartTime, parseTimeString } from '../utils/timeFormatter';
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// 创建Context
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const CaseDataContext = createContext(null);
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// localStorage键名
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const STORAGE_KEY = 'case_data_timeline';
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/**
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* CaseDataProvider组件
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* 包裹需要访问案件数据的组件树
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*/
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export const CaseDataProvider = ({ children }) => {
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const [caseData, setCaseData] = useState(null);
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const [loading, setLoading] = useState(false);
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const [error, setError] = useState(null);
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const [taskStartTime, setTaskStartTime] = useState(null); // 任务开始时间
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const [isTaskTimeFallback, setIsTaskTimeFallback] = useState(false); // 是否降级模式
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/**
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* 从localStorage读取数据
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*/
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const loadFromStorage = () => {
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try {
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const stored = localStorage.getItem(STORAGE_KEY);
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if (stored) {
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return JSON.parse(stored);
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}
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} catch (err) {
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console.error('Failed to load data from localStorage:', err);
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}
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return null;
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};
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/**
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* 保存数据到localStorage
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*/
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const saveToStorage = (data) => {
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try {
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localStorage.setItem(STORAGE_KEY, JSON.stringify(data));
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} catch (err) {
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console.error('Failed to save data to localStorage:', err);
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}
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};
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/**
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* 加载任务时间数据
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*/
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const loadTaskTime = async (timeline) => {
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try {
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const mediationId = timeline.id;
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const nodeId = timeline.current_node?.id;
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if (!mediationId || !nodeId) {
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throw new Error('缺少必要的参数: mediation_id 或 node_id');
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}
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console.log('Loading task time with:', { mediationId, nodeId });
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const response = await ProcessAPIService.getTaskTime(mediationId, nodeId);
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// 解析API返回的开始时间
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const startTimeStr = response.data?.startTime;
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if (startTimeStr) {
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const startTime = parseTimeString(startTimeStr);
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if (startTime) {
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setTaskStartTime(startTime);
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setIsTaskTimeFallback(false);
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console.log('Task start time loaded:', new Date(startTime).toLocaleString());
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return;
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}
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}
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throw new Error('无法解析开始时间');
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} catch (err) {
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console.error('Failed to load task time:', err);
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// 降级到本地计时
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const fallbackTime = getFallbackStartTime();
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setTaskStartTime(fallbackTime);
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setIsTaskTimeFallback(true);
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message.warning('任务时间API不可用，使用本地计时');
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console.log('Using fallback start time:', new Date(fallbackTime).toLocaleString());
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}
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};
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/**
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* 加载案件数据
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*/
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const loadCaseData = async (forceRefresh = false) => {
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// 如果不是强制刷新，先尝试从localStorage读取
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if (!forceRefresh) {
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const cachedData = loadFromStorage();
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if (cachedData) {
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setCaseData(cachedData);
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console.log('Loaded case data from localStorage');
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}
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}
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setLoading(true);
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setError(null);
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try {
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// 获取URL参数（合并默认值）
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const params = getMergedParams();
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console.log('Loading case data with params:', params);
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// 调用API获取数据
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const response = await ProcessAPIService.getCaseProcessInfo(
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params.caseId,
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{
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caseTypeFirst: params.caseTypeFirst,
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platform_code: params.platform_code
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}
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);
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// 提取timeline数据
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const timelineData = response.timeline || response.data?.timeline || response;
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// 更新状态
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setCaseData(timelineData);
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// 保存到localStorage
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saveToStorage(timelineData);
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// 加载任务时间数据
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await loadTaskTime(timelineData);
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console.log('Case data loaded successfully:', timelineData);
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} catch (err) {
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console.error('Failed to load case data:', err);
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setError(err.message || '加载案件数据失败');
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// 显示错误提示
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message.error('加载案件数据失败，请稍后重试');
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// 如果localStorage有数据，尝试使用缓存
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const cachedData = loadFromStorage();
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if (cachedData && !forceRefresh) {
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message.warning('已加载历史数据');
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setCaseData(cachedData);
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// 缓存数据也加载任务时间
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await loadTaskTime(cachedData);
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} else {
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// 使用Mock数据
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console.log('使用Mock数据');
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const mockData = mockTimelineData.data.timeline;
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setCaseData(mockData);
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saveToStorage(mockData);
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// Mock数据也加载任务时间
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await loadTaskTime(mockData);
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}
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} finally {
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setLoading(false);
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}
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};
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/**
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* 刷新数据（强制从API获取）
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*/
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const refreshData = () => {
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loadCaseData(true);
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};
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/**
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* 组件挂载时加载数据
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*/
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useEffect(() => {
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loadCaseData();
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// eslint-disable-next-line react-hooks/exhaustive-deps
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}, []); // 只在挂载时执行一次
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// 提供的值
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const value = {
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caseData,
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loading,
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error,
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refreshData,
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loadCaseData,
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taskStartTime, // 任务开始时间
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isTaskTimeFallback // 是否降级模式
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};
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return (
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<CaseDataContext.Provider value={value}>
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{children}
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</CaseDataContext.Provider>
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);
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};
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/**
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* 自定义Hook：使用案件数据
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* @returns {Object} { caseData, loading, error, refreshData, loadCaseData }
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*/
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export const useCaseData = () => {
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const context = useContext(CaseDataContext);
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if (!context) {
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throw new Error('useCaseData must be used within CaseDataProvider');
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}
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return context;
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};
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export default CaseDataContext;
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