'use client';

import Link from 'next/link';
import { useQueries, useQuery } from '@tanstack/react-query';
import { PageHeader } from '@/components/layout/page-header';
import { RequirePermission } from '@/components/require-permission';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import { Skeleton } from '@/components/ui/skeleton';
import { campaignsService } from '@/services/campaigns';
import { dashboardService } from '@/services/dashboard';
import { formatPercent, formatSeconds } from '@/lib/utils';

const ACTIVE_STATUSES = new Set(['RUNNING', 'PAUSED', 'DRAINING']);

function Content() {
  const { data: campaigns, isLoading } = useQuery({
    queryKey: ['campaigns'],
    queryFn: campaignsService.list,
    refetchInterval: 15_000,
  });

  const active = (campaigns ?? []).filter((c) => ACTIVE_STATUSES.has(c.status));

  const liveQueries = useQueries({
    queries: active.map((c) => ({
      queryKey: ['campaign-dashboard', c.id],
      queryFn: () => dashboardService.campaign(c.id),
      refetchInterval: 5_000,
    })),
  });

  if (isLoading) {
    return (
      <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-3">
        {Array.from({ length: 3 }).map((_, i) => (
          <Skeleton key={i} className="h-40 w-full" />
        ))}
      </div>
    );
  }

  if (active.length === 0) {
    return (
      <p className="py-16 text-center text-sm text-muted-foreground">
        Nenhuma campanha em execução, pausada ou drenando no momento.
      </p>
    );
  }

  return (
    <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-3">
      {active.map((campaign, idx) => {
        const live = liveQueries[idx]?.data;
        return (
          <Card key={campaign.id}>
            <CardHeader>
              <CardTitle className="flex items-center justify-between">
                <Link href={`/campanhas/${campaign.id}`} className="hover:underline">
                  {campaign.name}
                </Link>
                <Badge variant={campaign.status === 'RUNNING' ? 'success' : 'warning'}>
                  {campaign.status}
                </Badge>
              </CardTitle>
            </CardHeader>
            <CardContent className="grid grid-cols-2 gap-3 text-sm">
              <div>
                <p className="text-xs text-muted-foreground">CPS atual</p>
                <p className="font-medium">{live?.cpsAtual ?? '—'} / {campaign.maxCps}</p>
              </div>
              <div>
                <p className="text-xs text-muted-foreground">Conectadas</p>
                <p className="font-medium">{live?.connected ?? '—'}</p>
              </div>
              <div>
                <p className="text-xs text-muted-foreground">Leads restantes</p>
                <p className="font-medium">{live?.leadsRemaining ?? '—'}</p>
              </div>
              <div>
                <p className="text-xs text-muted-foreground">Abandono</p>
                <p className="font-medium">{formatPercent(live?.abandonRate ?? undefined)}</p>
              </div>
              <div>
                <p className="text-xs text-muted-foreground">TMA médio</p>
                <p className="font-medium">{formatSeconds(live?.avgTalkTimeSeconds ?? undefined)}</p>
              </div>
              <div>
                <p className="text-xs text-muted-foreground">Pacing</p>
                <p className="font-medium">{live?.pacingFactor?.toFixed(2) ?? '—'}</p>
              </div>
            </CardContent>
          </Card>
        );
      })}
    </div>
  );
}

export default function MonitoringCampaignsPage() {
  return (
    <RequirePermission permission="monitoring.view">
      <PageHeader title="Monitoramento de Campanhas" description="Campanhas ativas em tempo real" />
      <Content />
    </RequirePermission>
  );
}