import { NextResponse } from 'next/server';
import { prisma } from '@/lib/db/prisma';
import { animalFilterSchema } from '@/lib/validations/animal';

export async function GET(request: Request) {
  const { searchParams } = new URL(request.url);

  const parsed = animalFilterSchema.safeParse(
    Object.fromEntries(searchParams.entries())
  );

  if (!parsed.success) {
    return NextResponse.json(
      { error: 'Parâmetros inválidos.', details: parsed.error.flatten() },
      { status: 400 }
    );
  }

  const { district, species, sex, sterilized, urgent, status, page, limit } =
    parsed.data;

  const where = {
    ...(species    && { species }),
    ...(sex        && { sex }),
    ...(sterilized !== undefined && { sterilized }),
    ...(urgent     !== undefined && { urgent }),
    status: status ?? 'AVAILABLE',
    ...(district && {
      shelter: { district: { contains: district, mode: 'insensitive' as const } },
    }),
  };

  const [animals, total] = await Promise.all([
    prisma.animal.findMany({
      where,
      include: {
        photos:  { where: { isPrimary: true }, take: 1 },
        shelter: { select: { id: true, name: true, district: true } },
      },
      orderBy: [{ urgent: 'desc' }, { createdAt: 'desc' }],
      skip:  (page - 1) * limit,
      take:  limit,
    }),
    prisma.animal.count({ where }),
  ]);

  return NextResponse.json({
    animals,
    pagination: { page, limit, total, pages: Math.ceil(total / limit) },
  });
}