// API endpoint: return metrics for current company
import { NextApiRequest, NextApiResponse } from "next";
import { getServerSession } from "next-auth";
import { prisma } from "../../../lib/prisma";
import { sessionMetrics } from "../../../lib/metrics";
import { authOptions } from "../auth/[...nextauth]";

interface SessionUser {
  email: string;
  name?: string;
}

interface SessionData {
  user: SessionUser;
}

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse
) {
  const session = (await getServerSession(
    req,
    res,
    authOptions
  )) as SessionData | null;
  if (!session?.user) return res.status(401).json({ error: "Not logged in" });

  const user = await prisma.user.findUnique({
    where: { email: session.user.email },
    include: { company: true },
  });

  if (!user) return res.status(401).json({ error: "No user" });

  const sessions = await prisma.session.findMany({
    where: { companyId: user.companyId },
  });

  // Pass company config to metrics
  // @ts-expect-error - Type conversion is needed between prisma session and ChatSession
  const metrics = sessionMetrics(sessions, user.company);

  res.json({
    metrics,
    csvUrl: user.company.csvUrl,
    company: user.company,
  });
}