'use client';

import React, { useState, useEffect, useRef } from 'react';
import { useSearchParams } from 'next/navigation';
import { 
  getProjectTaskStatistics, 
  getMultiProjectTaskStatistics,
  getMessageQueueStatus,
  restartMessageQueue,
  TaskStatistics,
  MessageQueueStatus 
} from '@/api/video_flow';
import { cn } from '@/public/lib/utils';
import TaskStatisticsCards from '@/components/task-monitor/task-statistics-cards';
import TaskStatusChart from '@/components/task-monitor/task-status-chart';
import TaskTimelineChart from '@/components/task-monitor/task-timeline-chart';
import MessageQueuePanel from '@/components/task-monitor/message-queue-panel';
import TaskDetailTable from '@/components/task-monitor/task-detail-table';
import ProjectSelector from '@/components/task-monitor/project-selector';

export default function TaskMonitorPage() {
  const searchParams = useSearchParams();
  const initialProjectId = searchParams.get('project_id') || 'bc43bc81-c781-4caa-8256-9710fd5bee80';

  // 状态管理
  const [selectedProjectIds, setSelectedProjectIds] = useState<string[]>([initialProjectId]);
  const [timeRange, setTimeRange] = useState<number>(24); // 24小时
  const [taskStatistics, setTaskStatistics] = useState<TaskStatistics[]>([]);
  const [queueStatus, setQueueStatus] = useState<MessageQueueStatus[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [lastUpdateTime, setLastUpdateTime] = useState<Date | null>(null);
  const [autoRefresh, setAutoRefresh] = useState(true);

  // 刷新控制
  const refreshIntervalRef = useRef<NodeJS.Timeout | null>(null);

  // 获取任务统计数据
  const fetchTaskStatistics = async () => {
    try {
      setError(null);
      
      if (selectedProjectIds.length === 1) {
        const response = await getProjectTaskStatistics({
          project_id: selectedProjectIds[0],
          time_range: timeRange
        });
        
        if (response.code === 0 && response.data) {
          setTaskStatistics([response.data]);
        } else {
          throw new Error(response.message || '获取任务统计失败');
        }
      } else if (selectedProjectIds.length > 1) {
        const response = await getMultiProjectTaskStatistics({
          project_ids: selectedProjectIds,
          time_range: timeRange
        });
        
        if (response.code === 0 && response.data) {
          setTaskStatistics(response.data);
        } else {
          throw new Error(response.message || '获取多项目统计失败');
        }
      }
      
      setLastUpdateTime(new Date());
    } catch (err: any) {
      console.error('获取任务统计失败:', err);
      setError(err.message || '获取数据失败');
    }
  };

  // 获取消息队列状态
  const fetchQueueStatus = async () => {
    try {
      const response = await getMessageQueueStatus();
      
      if (response.code === 0 && response.data) {
        setQueueStatus(response.data);
      } else {
        console.warn('获取队列状态失败:', response.message);
      }
    } catch (err: any) {
      console.error('获取队列状态失败:', err);
    }
  };

  // 初始化数据加载
  const initializeData = async () => {
    setLoading(true);
    try {
      await Promise.all([
        fetchTaskStatistics(),
        fetchQueueStatus()
      ]);
    } finally {
      setLoading(false);
    }
  };

  // 手动刷新
  const handleRefresh = async () => {
    await initializeData();
  };

  // 重启消息队列
  const handleRestartQueue = async (queueName: string) => {
    try {
      const response = await restartMessageQueue({ queue_name: queueName });
      
      if (response.code === 0 && response.data?.success) {
        console.log('队列重启成功:', response.data);
        // 延迟刷新队列状态
        setTimeout(() => {
          fetchQueueStatus();
        }, 2000);
      } else {
        throw new Error(response.message || '重启失败');
      }
    } catch (err: any) {
      console.error('重启队列失败:', err);
      alert(`重启队列失败: ${err.message}`);
    }
  };

  // 项目选择变化
  const handleProjectChange = (projectIds: string[]) => {
    setSelectedProjectIds(projectIds);
  };

  // 时间范围变化
  const handleTimeRangeChange = (range: number) => {
    setTimeRange(range);
  };

  // 自动刷新控制
  useEffect(() => {
    if (autoRefresh) {
      refreshIntervalRef.current = setInterval(() => {
        fetchTaskStatistics();
        fetchQueueStatus();
      }, 30000); // 30秒刷新一次
    } else {
      if (refreshIntervalRef.current) {
        clearInterval(refreshIntervalRef.current);
        refreshIntervalRef.current = null;
      }
    }

    return () => {
      if (refreshIntervalRef.current) {
        clearInterval(refreshIntervalRef.current);
      }
    };
  }, [autoRefresh, selectedProjectIds, timeRange]);

  // 初始化和依赖变化时重新加载数据
  useEffect(() => {
    initializeData();
  }, [selectedProjectIds, timeRange]);

  if (loading) {
    return (
      <div className="flex items-center justify-center min-h-screen">
        <div className="text-center">
          <div className="animate-spin rounded-full h-32 w-32 border-b-2 border-blue-500 mx-auto"></div>
          <p className="mt-4 text-lg text-gray-600">加载任务监控数据...</p>
        </div>
      </div>
    );
  }

  return (
    <div className="min-h-screen bg-gradient-to-br from-gray-900 via-gray-800 to-gray-900">
      {/* 顶部导航栏 */}
      <div className="bg-gray-900 border-b border-gray-800 px-6 py-4">
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-4">
            <div className="flex items-center gap-2">
              <div className="w-3 h-3 rounded-full bg-emerald-400 animate-pulse"></div>
              <h1 className="text-xl font-bold text-white">任务监控中心</h1>
            </div>
            <div className="text-sm text-gray-400">
              实时监控项目任务状态和系统健康度
            </div>
          </div>

          {/* 控制面板 */}
          <div className="flex items-center gap-4">
            {/* 自动刷新开关 */}
            <label className="flex items-center gap-2 text-sm text-gray-400">
              <input
                type="checkbox"
                checked={autoRefresh}
                onChange={(e) => setAutoRefresh(e.target.checked)}
                className="rounded"
              />
              自动刷新
            </label>

            {/* 手动刷新按钮 */}
            <button
              onClick={handleRefresh}
              disabled={loading}
              className="px-4 py-2 bg-blue-500 hover:bg-blue-600 disabled:opacity-50 text-white rounded-lg transition-colors flex items-center gap-2"
            >
              <svg className={`w-4 h-4 ${loading ? 'animate-spin' : ''}`} fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
              </svg>
              刷新
            </button>

            {/* 最后更新时间 */}
            {lastUpdateTime && (
              <div className="text-sm text-gray-500">
                更新于 {lastUpdateTime.toLocaleTimeString()}
              </div>
            )}
          </div>
        </div>
      </div>

      {/* 错误提示 */}
      {error && (
        <div className="mx-6 mt-4 p-4 bg-red-500/10 border border-red-500/20 rounded-lg">
          <div className="flex items-center gap-2 text-red-400">
            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
            </svg>
            <span>{error}</span>
          </div>
        </div>
      )}

      {/* 主要内容区域 */}
      <div className="p-6 space-y-6">
        {/* 项目选择和时间范围控制 */}
        <div className="flex items-center gap-4">
          <ProjectSelector
            selectedProjectIds={selectedProjectIds}
            onProjectChange={handleProjectChange}
          />
          
          <div className="flex items-center gap-2">
            <label className="text-sm text-gray-400">时间范围:</label>
            <select
              value={timeRange}
              onChange={(e) => handleTimeRangeChange(Number(e.target.value))}
              className="px-3 py-2 bg-gray-800 border border-gray-700 rounded-lg text-white text-sm"
            >
              <option value={1}>最近1小时</option>
              <option value={6}>最近6小时</option>
              <option value={24}>最近24小时</option>
              <option value={72}>最近3天</option>
              <option value={168}>最近7天</option>
            </select>
          </div>
        </div>

        {/* 核心指标卡片 */}
        <TaskStatisticsCards statistics={taskStatistics} />

        {/* 数据可视化和控制面板 */}
        <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
          {/* 图表区域 */}
          <div className="lg:col-span-2 space-y-6">
            <TaskStatusChart statistics={taskStatistics} />
            <TaskTimelineChart projectIds={selectedProjectIds} timeRange={timeRange} />
          </div>

          {/* 控制面板 */}
          <div className="space-y-6">
            <MessageQueuePanel 
              queueStatus={queueStatus} 
              onRestartQueue={handleRestartQueue}
            />
          </div>
        </div>

        {/* 任务详情表格 */}
        <TaskDetailTable 
          projectIds={selectedProjectIds}
          timeRange={timeRange}
        />
      </div>
    </div>
  );
}