import { NextRequest, NextResponse } from "next/server";
import { prisma } from "@/lib/db";
import { decrypt } from "@/lib/utils/encryption";
import { createOrder, getOrderStatus, triggerExport, downloadOrderCSV } from "@/lib/services/vayne";

export async function POST(req: NextRequest) {
  try {
    const body = await req.json() as { salesNavUrl: string; maxResults: number };
    const { salesNavUrl, maxResults } = body;

    if (!salesNavUrl?.includes("linkedin.com/sales")) {
      return NextResponse.json({ error: "Invalid Sales Navigator URL" }, { status: 400 });
    }

    const cred = await prisma.apiCredential.findUnique({ where: { service: "vayne" } });
    if (!cred?.value) {
      return NextResponse.json({ error: "Vayne API token not configured" }, { status: 400 });
    }
    const apiToken = decrypt(cred.value);

    const job = await prisma.job.create({
      data: {
        type: "linkedin",
        status: "running",
        config: JSON.stringify({ salesNavUrl, maxResults }),
        totalLeads: 0,
      },
    });

    runVayneScrape(job.id, salesNavUrl, maxResults, apiToken).catch(console.error);

    return NextResponse.json({ jobId: job.id });
  } catch (err) {
    console.error("POST /api/jobs/vayne-scrape error:", err);
    return NextResponse.json({ error: "Failed to start scrape" }, { status: 500 });
  }
}

async function runVayneScrape(
  jobId: string,
  salesNavUrl: string,
  maxResults: number,
  apiToken: string
) {
  try {
    // 1. Create Vayne order
    const order = await createOrder(salesNavUrl, maxResults, apiToken, `LeadFlow-${jobId.slice(0, 8)}`);
    const orderId = order.id;

    await prisma.job.update({
      where: { id: jobId },
      data: { config: JSON.stringify({ salesNavUrl, maxResults, vayneOrderId: orderId }) },
    });

    // 2. Poll until finished
    let status = order.scraping_status;
    let scraped = 0;
    while (status !== "finished" && status !== "failed") {
      await sleep(5000);
      const updated = await getOrderStatus(orderId, apiToken);
      status = updated.scraping_status;
      scraped = updated.scraped || 0;
      await prisma.job.update({ where: { id: jobId }, data: { totalLeads: scraped } });
    }

    if (status === "failed") {
      throw new Error("Vayne scraping failed");
    }

    // 3. Trigger export
    let exportOrder = await triggerExport(orderId, apiToken);

    // 4. Poll for export completion
    let exportStatus = exportOrder.exports?.[0]?.status;
    while (exportStatus !== "completed") {
      await sleep(3000);
      exportOrder = await getOrderStatus(orderId, apiToken);
      exportStatus = exportOrder.exports?.[0]?.status;
      if (exportStatus === undefined) break; // fallback
    }

    const fileUrl = exportOrder.exports?.[0]?.file_url;
    if (!fileUrl) throw new Error("No export file URL returned by Vayne");

    // 5. Download and parse CSV
    const profiles = await downloadOrderCSV(fileUrl);

    // 6. Store results
    await prisma.leadResult.createMany({
      data: profiles.map(p => ({
        jobId,
        companyName: p.company || null,
        domain: p.companyDomain || null,
        contactName: p.fullName || null,
        contactTitle: p.title || null,
        linkedinUrl: p.linkedinUrl || null,
        source: JSON.stringify({ location: p.location }),
      })),
    });

    await prisma.job.update({
      where: { id: jobId },
      data: { status: "complete", totalLeads: profiles.length },
    });
  } catch (err) {
    const message = err instanceof Error ? err.message : String(err);
    await prisma.job.update({
      where: { id: jobId },
      data: { status: "failed", error: message },
    });
  }
}

function sleep(ms: number) {
  return new Promise(r => setTimeout(r, ms));
}