import { NextRequest, NextResponse } from "next/server";
import { prisma } from "@/lib/db";
import { getApiKey } from "@/lib/utils/apiKey";
import {
  submitBulkPersonSearch,
  getBulkSearchStatus,
  downloadBulkResults,
  searchDecisionMakerByDomain,
  type DecisionMakerCategory,
} from "@/lib/services/anymailfinder";

export async function POST(req: NextRequest) {
  try {
    const body = await req.json() as {
      jobId: string;
      resultIds: string[];
      categories: DecisionMakerCategory[];
    };
    const { jobId, resultIds, categories } = body;

    const apiKey = await getApiKey("anymailfinder");
    if (!apiKey) return NextResponse.json({ error: "Anymailfinder API key not configured" }, { status: 400 });

    const results = await prisma.leadResult.findMany({
      where: { id: { in: resultIds }, jobId, domain: { not: null } },
    });

    const enrichJob = await prisma.job.create({
      data: {
        type: "linkedin-enrich",
        status: "running",
        config: JSON.stringify({ parentJobId: jobId, categories }),
        totalLeads: results.length,
      },
    });

    runLinkedInEnrich(enrichJob.id, jobId, results, categories, apiKey).catch(console.error);

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

async function runLinkedInEnrich(
  enrichJobId: string,
  parentJobId: string,
  results: Array<{
    id: string; domain: string | null; contactName: string | null;
    companyName: string | null; contactTitle: string | null; linkedinUrl: string | null;
  }>,
  categories: DecisionMakerCategory[],
  apiKey: string
) {
  let emailsFound = 0;

  try {
    // Separate results into those with names (person search) and those without (decision maker search)
    const withNames: typeof results = [];
    const withoutNames: typeof results = [];

    for (const r of results) {
      if (r.contactName && r.domain) {
        withNames.push(r);
      } else if (r.domain) {
        withoutNames.push(r);
      }
    }

    // Map to look up results by domain
    const resultByDomain = new Map(results.map(r => [r.domain!, r]));

    // 1. Bulk person name search for leads with names
    if (withNames.length > 0) {
      const leads = withNames.map(r => {
        const nameParts = (r.contactName || "").trim().split(/\s+/);
        return {
          domain: r.domain!,
          firstName: nameParts[0] || "",
          lastName: nameParts.slice(1).join(" ") || "",
        };
      });

      try {
        const searchId = await submitBulkPersonSearch(leads, apiKey, `linkedin-enrich-${enrichJobId}`);

        // Poll for completion
        let status;
        do {
          await sleep(5000);
          status = await getBulkSearchStatus(searchId, apiKey);
        } while (status.status !== "completed" && status.status !== "failed");

        if (status.status === "completed") {
          const rows = await downloadBulkResults(searchId, apiKey);

          for (const row of rows) {
            const domain = row["domain"] || row["Domain"] || "";
            const result = resultByDomain.get(domain);
            if (!result) continue;

            const email = row["email"] || row["Email"] || null;
            const emailStatus = (row["email_status"] || row["Email Status"] || "not_found").toLowerCase();
            const isValid = emailStatus === "valid";
            if (isValid) emailsFound++;

            await prisma.leadResult.update({
              where: { id: result.id },
              data: {
                email: email || null,
                confidence: isValid ? 1.0 : emailStatus === "risky" ? 0.5 : 0,
                contactName: row["person_full_name"] || row["Full Name"] || result.contactName || null,
                contactTitle: row["person_job_title"] || row["Job Title"] || result.contactTitle || null,
              },
            });
          }
        }
      } catch (err) {
        console.error("Bulk person search error:", err);
        // Fall through — will attempt decision-maker search below
      }
    }

    // 2. Decision-maker search for leads without names
    for (const r of withoutNames) {
      if (!r.domain) continue;
      try {
        const found = await searchDecisionMakerByDomain(r.domain, categories, apiKey);
        const isValid = !!found.valid_email;
        if (isValid) emailsFound++;

        await prisma.leadResult.update({
          where: { id: r.id },
          data: {
            email: found.email || null,
            confidence: isValid ? 1.0 : found.email_status === "risky" ? 0.5 : 0,
            contactName: found.person_full_name || r.contactName || null,
            contactTitle: found.person_job_title || r.contactTitle || null,
          },
        });

        await prisma.job.update({ where: { id: enrichJobId }, data: { emailsFound } });
      } catch (err) {
        console.error(`Decision-maker search error for domain ${r.domain}:`, err);
      }
    }

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

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