Cron Job Management Dashboard Component #

import { useState, useEffect } from 'react';
import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { Switch } from '@/components/ui/switch';
import { Skeleton } from '@/components/ui/skeleton';
import { Alert, AlertDescription } from '@/components/ui/alert';
import { 
  Clock, 
  Play, 
  Square, 
  RefreshCw, 
  AlertCircle,
  CheckCircle2,
  Loader2
} from 'lucide-react';
import { useToast } from '@/hooks/use-toast';
import { format } from 'date-fns';

interface CronJob {
  name: string;
  schedule: string;
  description: string;
  type: string;
  methodName: string;
  nextRun: string;
  isEnabled: boolean;
}

interface CronJobState {
  [key: string]: boolean;
}

interface CronJobsManagementProps {
  apiUrl?: string;
}

export function CronJobsManagement({ apiUrl }: CronJobsManagementProps) {
  const { toast } = useToast();
  const [jobs, setJobs] = useState<CronJob[]>([]);
  const [states, setStates] = useState<CronJobState>({});
  const [loading, setLoading] = useState(true);
  const [toggling, setToggling] = useState<string | null>(null);
  const [running, setRunning] = useState<string | null>(null);

  // Fetch cron job schedules
  const fetchSchedules = async () => {
    try {
      const response = await fetch(`${apiUrl}/cron-jobs/schedules`, {
        headers: {
          'Authorization': `Bearer ${localStorage.getItem('jwt_token')}`,
        },
      });
      
      if (!response.ok) throw new Error('Failed to fetch schedules');
      
      const data = await response.json();
      setJobs(data);
    } catch (error) {
      console.error('Error fetching schedules:', error);
      toast({
        title: 'Error',
        description: 'Failed to load cron job schedules',
        variant: 'destructive',
      });
    } finally {
      setLoading(false);
    }
  };

  // Fetch current states
  const fetchStates = async () => {
    try {
      const response = await fetch(`${apiUrl}/cron-jobs/states`, {
        headers: {
          'Authorization': `Bearer ${localStorage.getItem('jwt_token')}`,
        },
      });
      
      if (!response.ok) throw new Error('Failed to fetch states');
      
      const data = await response.json();
      setStates(data);
    } catch (error) {
      console.error('Error fetching states:', error);
    }
  };

  // Toggle job on/off
  const handleToggle = async (jobType: string, enabled: boolean) => {
    setToggling(jobType);
    
    try {
      const response = await fetch(`${apiUrl}/cron-jobs/${jobType}/toggle`, {
        method: 'PUT',
        headers: {
          'Content-Type': 'application/json',
          'Authorization': `Bearer ${localStorage.getItem('jwt_token')}`,
        },
        body: JSON.stringify({ enabled }),
      });

      if (!response.ok) throw new Error('Failed to toggle job');

      const data = await response.json();
      
      toast({
        title: enabled ? 'Job Enabled' : 'Job Disabled',
        description: data.message,
        variant: 'default',
      });

      // Update state
      setStates(prev => ({ ...prev, [jobType]: enabled }));
      
      // Refresh to get updated schedules
      await fetchSchedules();
    } catch (error) {
      console.error('Error toggling job:', error);
      toast({
        title: 'Error',
        description: 'Failed to toggle cron job',
        variant: 'destructive',
      });
    } finally {
      setToggling(null);
    }
  };

  // Manually run a job
  const handleRunNow = async (jobType: string) => {
    setRunning(jobType);
    
    try {
      const response = await fetch(`${apiUrl}/cron-jobs/${jobType}/run`, {
        method: 'POST',
        headers: {
          'Authorization': `Bearer ${localStorage.getItem('jwt_token')}`,
        },
      });

      if (!response.ok) throw new Error('Failed to run job');

      const data = await response.json();
      
      toast({
        title: data.success ? 'Job Started' : 'Job Failed',
        description: data.message,
        variant: data.success ? 'default' : 'destructive',
      });
    } catch (error) {
      console.error('Error running job:', error);
      toast({
        title: 'Error',
        description: 'Failed to run cron job',
        variant: 'destructive',
      });
    } finally {
      setRunning(null);
    }
  };

  useEffect(() => {
    fetchSchedules();
    fetchStates();
    
    // Refresh states every 30 seconds
    const interval = setInterval(fetchStates, 30000);
    return () => clearInterval(interval);
  }, []);

  if (loading) {
    return (
      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
        {[1, 2, 3, 4].map((i) => (
          <Card key={i}>
            <CardHeader>
              <Skeleton className="h-5 w-32" />
              <Skeleton className="h-4 w-48" />
            </CardHeader>
            <CardContent>
              <Skeleton className="h-10 w-full" />
            </CardContent>
          </Card>
        ))}
      </div>
    );
  }

  return (
    <div className="space-y-6">
      <div className="flex items-center justify-between">
        <div>
          <h2 className="text-3xl font-bold tracking-tight">Cron Jobs</h2>
          <p className="text-muted-foreground">
            Manage automated background jobs
          </p>
        </div>
        <Button onClick={() => { fetchSchedules(); fetchStates(); }} variant="outline">
          <RefreshCw className="h-4 w-4 mr-2" />
          Refresh
        </Button>
      </div>

      <Alert>
        <AlertCircle className="h-4 w-4" />
        <AlertDescription>
          Changes take effect immediately. Disabled jobs will not execute until enabled.
        </AlertDescription>
      </Alert>

      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
        {jobs.map((job) => {
          const currentState = states[job.type] ?? job.isEnabled;
          const isToggling = toggling === job.type;
          const isRunning = running === job.type;

          return (
            <Card key={job.type} className="relative">
              <CardHeader>
                <div className="flex items-start justify-between">
                  <div className="space-y-1">
                    <CardTitle className="text-lg">{job.name}</CardTitle>
                    <CardDescription>{job.description}</CardDescription>
                  </div>
                  <Badge 
                    variant={currentState ? 'default' : 'secondary'}
                    className="shrink-0"
                  >
                    {currentState ? (
                      <CheckCircle2 className="h-3 w-3 mr-1" />
                    ) : (
                      <Square className="h-3 w-3 mr-1" />
                    )}
                    {currentState ? 'Enabled' : 'Disabled'}
                  </Badge>
                </div>
              </CardHeader>
              <CardContent className="space-y-4">
                {/* Schedule Info */}
                <div className="flex items-center text-sm text-muted-foreground">
                  <Clock className="h-4 w-4 mr-2" />
                  <span className="font-mono">{job.schedule}</span>
                </div>

                {/* Next Run */}
                <div className="text-sm">
                  <span className="text-muted-foreground">Next run: </span>
                  <span className="font-medium">
                    {format(new Date(job.nextRun), 'PPpp')}
                  </span>
                </div>

                {/* Controls */}
                <div className="flex items-center space-x-2 pt-2 border-t">
                  <Switch
                    checked={currentState}
                    onCheckedChange={(checked) => handleToggle(job.type, checked)}
                    disabled={isToggling}
                  />
                  <span className="text-sm flex-1">
                    {isToggling ? 'Updating...' : currentState ? 'Enabled' : 'Disabled'}
                  </span>
                  <Button
                    size="sm"
                    variant="outline"
                    onClick={() => handleRunNow(job.type)}
                    disabled={isRunning || isToggling}
                  >
                    {isRunning ? (
                      <Loader2 className="h-4 w-4 animate-spin" />
                    ) : (
                      <Play className="h-4 w-4" />
                    )}
                  </Button>
                </div>
              </CardContent>
            </Card>
          );
        })}
      </div>

      {/* Job Statistics */}
      <Card>
        <CardHeader>
          <CardTitle>Statistics</CardTitle>
        </CardHeader>
        <CardContent>
          <div className="grid gap-4 md:grid-cols-4">
            <div>
              <div className="text-2xl font-bold">
                {jobs.filter(j => states[j.type] ?? j.isEnabled).length}
              </div>
              <div className="text-sm text-muted-foreground">
                Active Jobs
              </div>
            </div>
            <div>
              <div className="text-2xl font-bold">
                {jobs.filter(j => !(states[j.type] ?? j.isEnabled)).length}
              </div>
              <div className="text-sm text-muted-foreground">
                Disabled Jobs
              </div>
            </div>
            <div>
              <div className="text-2xl font-bold">{jobs.length}</div>
              <div className="text-sm text-muted-foreground">
                Total Jobs
              </div>
            </div>
            <div>
              <div className="text-2xl font-bold">
                {Math.round((jobs.filter(j => states[j.type] ?? j.isEnabled).length / jobs.length) * 100)}%
              </div>
              <div className="text-sm text-muted-foreground">
                Active Rate
              </div>
            </div>
          </div>
        </CardContent>
      </Card>
    </div>
  );
}

export default CronJobsManagement;