import { NextRequest, NextResponse } from "next/server";
import { prisma } from "@/lib/db";
import Papa from "papaparse";

export async function GET(
  req: NextRequest,
  { params }: { params: Promise<{ jobId: string }> }
) {
  try {
    const { jobId } = await params;
    const job = await prisma.job.findUnique({
      where: { id: jobId },
      include: { results: { orderBy: { createdAt: "asc" } } },
    });

    if (!job) return NextResponse.json({ error: "Job not found" }, { status: 404 });

    const rows = job.results.map(r => ({
      company_name: r.companyName || "",
      domain: r.domain || "",
      contact_name: r.contactName || "",
      contact_title: r.contactTitle || "",
      email: r.email || "",
      confidence_score: r.confidence !== null ? Math.round((r.confidence || 0) * 100) + "%" : "",
      source_tab: job.type,
      job_id: job.id,
      found_at: r.createdAt.toISOString(),
    }));

    const csv = Papa.unparse(rows);

    return new NextResponse(csv, {
      headers: {
        "Content-Type": "text/csv",
        "Content-Disposition": `attachment; filename="leadflow-${job.type}-${jobId.slice(0, 8)}.csv"`,
      },
    });
  } catch (err) {
    console.error("GET /api/export/[jobId] error:", err);
    return NextResponse.json({ error: "Failed to export" }, { status: 500 });
  }
}