import { NextResponse } from 'next/server';
import { prisma } from '@/lib/db';
import { Bias } from '@prisma/client';

export async function GET(request: Request) {
  const { searchParams } = new URL(request.url);
  const query = searchParams.get('q') || '';
  const bias = searchParams.get('bias') as Bias | null;
  const sort = searchParams.get('sort') || 'rank';
  const limit = Number(searchParams.get('limit') || '50');
  const offset = Number(searchParams.get('offset') || '0');

  const orderBy = sort === 'date'
    ? { publishedAt: 'desc' as const }
    : { rankScore: 'desc' as const };

  const articles = await prisma.article.findMany({
    where: {
      status: 'PUBLISHED',
      ...(bias && { primaryBias: bias }),
      ...(query && {
        OR: [
          { title: { contains: query } },
          { summary: { contains: query } },
          { topics: { contains: query } },
        ],
      }),
    },
    orderBy: [orderBy, { publishedAt: 'desc' }],
    take: limit,
    skip: offset,
    include: { source: true },
  });

  return NextResponse.json({ articles });
}