import { createSummitRequest } from "@/lib/summit-requests";
import type { AdminRequestRow } from "@/types/admin-submission";
import { NextResponse } from "next/server";

export const runtime = "nodejs";

const INDUSTRY_SEGMENT: Record<string, string> = {
  government: "enterprise",
  telecom: "tier1",
  cloud: "cloud",
  ai: "enterprise",
  others: "enterprise",
};

function displayDateNow(): string {
  return new Date()
    .toLocaleDateString("en-GB", { day: "2-digit", month: "short", year: "numeric" })
    .toUpperCase()
    .replace(/ /g, " ");
}

function newId(): string {
  return `V6-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
}

type RegistrationBody = {
  type: "registration";
  fullName: string;
  phone: string;
  email: string;
  company: string;
  jobTitle: string;
  industry: string;
  industryLabel?: string;
  notes: string;
};

type FeedbackBody = {
  type: "feedback";
  [key: string]: any;
};

function buildFeedbackNotes(b: FeedbackBody): string {
  const lines = [
    "Source: Event feedback",
    b.overallExperience && `Overall experience: ${b.overallExperience}/5`,
    b.venueFacilities && `Venue & Facilities: ${b.venueFacilities}/5`,
    b.organisationProcess && `Organisation & Registration: ${b.organisationProcess}/5`,
    b.mostValuableSession && `Most valuable session: ${b.mostValuableSession}`,
    b.relevance && `Content relevance: ${b.relevance}`,
    b.speakerRating && `Speakers/Panels rating: ${b.speakerRating}`,
    b.networkingUtility && `Networking utility: ${b.networkingUtility}`,
    b.futureTopics && `Future topics: ${Array.isArray(b.futureTopics) ? b.futureTopics.join(", ") : b.futureTopics}${b.futureTopics_other ? ` (Other: ${b.futureTopics_other})` : ""}`,
    b.attendAgain && `Attend again in 2027: ${b.attendAgain}`,
    b.recommend && `Recommend to others: ${b.recommend}`,
    b.enjoyedMost && `Enjoyed most: ${b.enjoyedMost}`,
    b.improvementAreas && `Improvement areas: ${b.improvementAreas}`,
    b.additionalComments && `Additional comments: ${b.additionalComments}`,
    b.industry && `Industry: ${Array.isArray(b.industry) ? b.industry.join(", ") : b.industry}${b.industry_other ? ` (Other: ${b.industry_other})` : ""}`,
    b.role && `Role: ${Array.isArray(b.role) ? b.role.join(", ") : b.role}${b.role_other ? ` (Other: ${b.role_other})` : ""}`,
  ];
  return lines.filter(Boolean).join("\n");
}

export async function POST(req: Request) {
  let body: unknown;
  try {
    body = await req.json();
  } catch {
    return NextResponse.json({ error: "Invalid JSON" }, { status: 400 });
  }

  if (!body || typeof body !== "object" || !("type" in body)) {
    return NextResponse.json({ error: "Missing type" }, { status: 400 });
  }

  const t = (body as { type: string }).type;
  const submittedAt = new Date().toISOString().slice(0, 10);
  const displayDate = displayDateNow();

  if (t === "registration") {
    const b = body as RegistrationBody;
    const fullName = typeof b.fullName === "string" ? b.fullName.trim() : "";
    const email = typeof b.email === "string" ? b.email.trim() : "";
    if (!fullName || !email) {
      return NextResponse.json({ error: "Full name and email are required" }, { status: 400 });
    }

    const industry = typeof b.industry === "string" ? b.industry : "";
    const segment = INDUSTRY_SEGMENT[industry] ?? "enterprise";
    const industryLabel = typeof b.industryLabel === "string" ? b.industryLabel : industry;
    const noteParts = [
      typeof b.notes === "string" && b.notes.trim() ? b.notes.trim() : "",
      industryLabel ? `Industry: ${industryLabel}` : "",
    ].filter(Boolean);

    const row: AdminRequestRow = {
      id: newId(),
      submittedAt,
      displayDate,
      fullName,
      jobTitle: typeof b.jobTitle === "string" ? b.jobTitle.trim() : "",
      company: typeof b.company === "string" ? b.company.trim() : "",
      segment,
      email,
      phone: typeof b.phone === "string" ? b.phone.trim() : "",
      status: "pending",
      notes: noteParts.join("\n"),
      source: "registration",
    };

    try {
      await createSummitRequest(row);
    } catch (e: unknown) {
      const code = e && typeof e === "object" && "code" in e ? (e as { code?: number }).code : undefined;
      if (code === 11000) {
        return NextResponse.json({ error: "Duplicate submission id" }, { status: 409 });
      }
      console.error(e);
      return NextResponse.json({ error: "Could not save submission" }, { status: 500 });
    }
    return NextResponse.json({ ok: true, id: row.id });
  }

  if (t === "feedback") {
    const b = body as FeedbackBody;
    const sessionTitle =
      typeof b.mostValuableSession === "string" && b.mostValuableSession
        ? b.mostValuableSession
        : "General";

    const row: AdminRequestRow = {
      id: newId(),
      submittedAt,
      displayDate,
      fullName: "Event feedback",
      jobTitle: sessionTitle,
      company: "—",
      segment: "enterprise",
      email: "—",
      phone: "—",
      status: "pending",
      notes: buildFeedbackNotes(b),
      source: "feedback",
    };

    try {
      await createSummitRequest(row);
    } catch (e: unknown) {
      const code = e && typeof e === "object" && "code" in e ? (e as { code?: number }).code : undefined;
      if (code === 11000) {
        return NextResponse.json({ error: "Duplicate submission id" }, { status: 409 });
      }
      console.error(e);
      return NextResponse.json({ error: "Could not save submission" }, { status: 500 });
    }
    return NextResponse.json({ ok: true, id: row.id });
  }

  return NextResponse.json({ error: "Unknown type" }, { status: 400 });
}