/**
 * DC模块 - 最近任务Hook
 * 
 * 管理最近任务列表的状态和数据获取
 */

import { useState, useEffect } from 'react';
import type { Task } from '../types/portal';

// Mock数据
const mockTasks: Task[] = [
  {
    id: 'task-001',
    name: '2025糖尿病研究数据提取',
    tool: 'tool-b',
    toolName: 'AI结构化',
    status: 'completed',
    progress: 100,
    createdAt: '2025-12-01T10:30:00Z',
    completedAt: '2025-12-01T11:45:00Z'
  },
  {
    id: 'task-002',
    name: '高血压病历结构化处理',
    tool: 'tool-b',
    toolName: 'AI结构化',
    status: 'processing',
    progress: 65,
    createdAt: '2025-12-02T09:15:00Z'
  },
  {
    id: 'task-003',
    name: '多中心数据合并任务',
    tool: 'tool-a',
    toolName: '超级合并器',
    status: 'pending',
    progress: 0,
    createdAt: '2025-12-02T13:20:00Z'
  }
];

export const useRecentTasks = () => {
  const [tasks, setTasks] = useState<Task[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  // 获取任务列表
  const fetchTasks = async () => {
    try {
      setLoading(true);
      
      // TODO: 替换为真实API调用
      // const response = await fetch('/api/v1/dc/tasks/recent');
      // const data = await response.json();
      
      // 模拟API延迟
      await new Promise(resolve => setTimeout(resolve, 500));
      
      setTasks(mockTasks);
      setError(null);
    } catch (err) {
      setError(err instanceof Error ? err.message : '获取任务列表失败');
    } finally {
      setLoading(false);
    }
  };

  // 轮询更新（processing状态的任务每5秒更新一次）
  useEffect(() => {
    fetchTasks();

    const hasProcessingTasks = tasks.some(t => t.status === 'processing');
    
    if (hasProcessingTasks) {
      const interval = setInterval(() => {
        fetchTasks();
      }, 5000); // 5秒轮询

      return () => clearInterval(interval);
    }
  }, []);

  // 刷新任务列表
  const refresh = () => {
    fetchTasks();
  };

  return {
    tasks,
    loading,
    error,
    refresh
  };
};