import { NextResponse } from "next/server";
import { auth } from "@/auth";
import { createRequest, listRequests, validateCreateRequestInput } from "@/lib/requests";

// middleware.ts's config.matcher deliberately excludes /api from route
// protection (see its comment) — API routes verify the session themselves,
// here, rather than relying on middleware alone. Permission model is flat
// (CLAUDE.md): this only checks "logged in or not", no role/permission
// check.
export async function POST(request: Request): Promise<NextResponse> {
  const session = await auth();
  if (!session) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  let body: unknown;
  try {
    body = await request.json();
  } catch {
    return NextResponse.json({ error: "Request body must be valid JSON" }, { status: 400 });
  }

  if (typeof body !== "object" || body === null) {
    return NextResponse.json({ error: "Request body must be a JSON object" }, { status: 400 });
  }

  const { employee_id, type, reason } = body as Record<string, unknown>;
  const validation = validateCreateRequestInput({ employee_id, type, reason });

  if (!validation.ok) {
    return NextResponse.json({ error: validation.error }, { status: 400 });
  }

  const created = await createRequest(validation.value);
  if (!created.ok) {
    return NextResponse.json({ error: created.error }, { status: 400 });
  }

  return NextResponse.json(created.value, { status: 201 });
}

export async function GET(): Promise<NextResponse> {
  const session = await auth();
  if (!session) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  const requests = await listRequests();
  return NextResponse.json(requests, { status: 200 });
}