/**
 * Sync Dashboard Component
 * Displays sync status and last sync information
 */

'use client';

import { useEffect, useState } from 'react';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import { formatDistanceToNow } from 'date-fns';
import { getEntityDisplayName } from '@/lib/utils/sync-helpers';
import { EntityType } from '@/lib/types/sync';

interface LastSyncInfo {
  [key: string]: {
    completed_at: string;
    status: string;
    records_added: number;
    records_updated: number;
    records_deleted: number;
  };
}

interface SyncDashboardProps {
  refreshKey: number;
}

export default function SyncDashboard({ refreshKey }: SyncDashboardProps) {
  const [lastSyncInfo, setLastSyncInfo] = useState<LastSyncInfo>({});
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    fetchLastSyncInfo();
  }, [refreshKey]);

  const fetchLastSyncInfo = async () => {
    try {
      const response = await fetch('/api/sync/last-sync');
      if (response.ok) {
        const data = await response.json();
        setLastSyncInfo(data.lastSync || {});
      }
    } catch (error) {
      console.error('Failed to fetch last sync info:', error);
    } finally {
      setLoading(false);
    }
  };

  if (loading) {
    return (
      <Card>
        <CardHeader>
          <CardTitle>Sync Status</CardTitle>
          <CardDescription>
            Last sync information for each entity
          </CardDescription>
        </CardHeader>
        <CardContent>
          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-3 md:gap-4">
            {[1, 2, 3, 4, 5, 6].map((i) => (
              <div key={i} className="border rounded-lg p-4 space-y-2">
                <div className="flex items-center justify-between">
                  <div className="h-4 w-24 bg-muted animate-pulse rounded" />
                  <div className="h-5 w-16 bg-muted animate-pulse rounded-full" />
                </div>
                <div className="h-3 w-32 bg-muted animate-pulse rounded" />
                <div className="space-y-1">
                  <div className="h-3 w-full bg-muted animate-pulse rounded" />
                  <div className="h-3 w-full bg-muted animate-pulse rounded" />
                  <div className="h-3 w-full bg-muted animate-pulse rounded" />
                </div>
              </div>
            ))}
          </div>
        </CardContent>
      </Card>
    );
  }

  const entityKeys = Object.keys(lastSyncInfo);

  return (
    <Card>
      <CardHeader>
        <CardTitle>Sync Status</CardTitle>
        <CardDescription>
          Last sync information for each entity
        </CardDescription>
      </CardHeader>
      <CardContent>
        {entityKeys.length === 0 ? (
          <p className="text-muted-foreground">No sync history available</p>
        ) : (
          <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-3 md:gap-4">
            {entityKeys.map((entityKey) => {
              const info = lastSyncInfo[entityKey];
              const completedAt = new Date(info.completed_at);

              return (
                <div
                  key={entityKey}
                  className="group relative overflow-hidden rounded-lg border bg-card p-4 transition-all hover:shadow-md hover:border-primary/50 space-y-2"
                >
                  <div className="flex items-center justify-between">
                    <h4 className="font-semibold text-sm truncate">
                      {getEntityDisplayName(entityKey as EntityType)}
                    </h4>
                    <Badge
                      variant={info.status === 'completed' ? 'default' : 'destructive'}
                      className="text-xs shrink-0"
                    >
                      {info.status}
                    </Badge>
                  </div>

                  <p className="text-xs text-muted-foreground">
                    {formatDistanceToNow(completedAt, { addSuffix: true })}
                  </p>

                  <div className="text-xs space-y-1 pt-1">
                    <div className="flex justify-between items-center">
                      <span className="text-muted-foreground">Added:</span>
                      <span className="font-medium text-green-600 dark:text-green-400">
                        +{info.records_added.toLocaleString()}
                      </span>
                    </div>
                    <div className="flex justify-between items-center">
                      <span className="text-muted-foreground">Updated:</span>
                      <span className="font-medium text-blue-600 dark:text-blue-400">
                        ~{info.records_updated.toLocaleString()}
                      </span>
                    </div>
                    <div className="flex justify-between items-center">
                      <span className="text-muted-foreground">Deleted:</span>
                      <span className="font-medium text-red-600 dark:text-red-400">
                        -{info.records_deleted.toLocaleString()}
                      </span>
                    </div>
                  </div>
                  
                  {/* Subtle hover indicator */}
                  <div className="absolute inset-x-0 bottom-0 h-0.5 bg-primary/50 transform scale-x-0 group-hover:scale-x-100 transition-transform" />
                </div>
              );
            })}
          </div>
        )}
      </CardContent>
    </Card>
  );
}