import type { UserTrail } from '#shared/types/map';
import { useValidatedParams, z, zh } from 'h3-zod';
import prisma from '~~/lib/prisma';

/**
 * Full TrackPoint trail for a single user in a hunt, fetched lazily when an
 * organizer clicks a user on the live map.
 *
 * Gated by HuntMember membership AND `hunt.trackDistance` (404 otherwise).
 * Plain JSON: `recordedAt` as ISO strings, coordinates coerced to numbers.
 */
export default defineEventHandler(async (event): Promise<UserTrail> => {
  const user = await requireUserSession(event);
  const callerId = user.user.id;

  const { huntId, userId } = await useValidatedParams(
    event,
    z.object({
      huntId: zh.numAsString,
      userId: zh.numAsString
    })
  );

  const hunt = await prisma.hunt.findUnique({
    where: {
      id: huntId,
      trackDistance: true,
      members: {
        some: {
          memberId: callerId
        }
      }
    },
    select: { id: true }
  });

  if (!hunt) {
    throw createError({ status: 404, statusText: 'Not found!' });
  }

  const points = await prisma.trackPoint.findMany({
    where: { huntId, userId },
    orderBy: { recordedAt: 'asc' },
    select: { lat: true, lon: true, accuracy: true, recordedAt: true }
  });

  return {
    points: points.map((p) => ({
      lat: Number(p.lat),
      lon: Number(p.lon),
      accuracy: p.accuracy,
      recordedAt: p.recordedAt.toISOString()
    }))
  };
});