import Event from "../../../models/event";

export default defineEventHandler(async (event) => {
  const id = getRouterParam(event, "id");
  const body = await readBody(event);
  const { email } = body;

  if (!email) {
    throw createError({
      statusCode: 400,
      statusMessage: "Email is required",
    });
  }

  try {
    // Check if id is a valid ObjectId or treat as slug
    const isObjectId = /^[0-9a-fA-F]{24}$/.test(id);
    const query = isObjectId
      ? { $or: [{ _id: id }, { slug: id }] }
      : { slug: id };

    const eventDoc = await Event.findOne(query);

    if (!eventDoc) {
      throw createError({
        statusCode: 404,
        statusMessage: "Event not found",
      });
    }

    // Check if the email exists in the registrations array
    const isRegistered = eventDoc.registrations.some(
      (registration) =>
        registration.email.toLowerCase() === email.toLowerCase(),
    );

    return {
      isRegistered,
      eventId: eventDoc._id,
      eventTitle: eventDoc.title,
    };
  } catch (error) {
    console.error("Error checking registration:", error);
    throw createError({
      statusCode: 500,
      statusMessage: "Failed to check registration status",
    });
  }
});