import Series from "../../../../models/series.js";
import Member from "../../../../models/member.js";
import {
  calculateSeriesTicketPrice,
  checkSeriesTicketAvailability,
  checkUserSeriesPass,
} from "../../../../utils/tickets.js";

export default defineEventHandler(async (event) => {
  try {
    const seriesId = getRouterParam(event, "id");
    const query = getQuery(event);
    const email = query.email;

    // Fetch series
    // Build query conditions based on whether seriesId looks like ObjectId or string
    const isObjectId = /^[0-9a-fA-F]{24}$/.test(seriesId);
    const seriesQuery = isObjectId
      ? { $or: [{ _id: seriesId }, { id: seriesId }, { slug: seriesId }] }
      : { $or: [{ id: seriesId }, { slug: seriesId }] };

    const series = await Series.findOne(seriesQuery);

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

    // Check if tickets are enabled
    if (!series.tickets?.enabled) {
      return {
        available: false,
        message: "Tickets are not enabled for this series",
      };
    }

    // Check membership if email provided
    let member = null;

    if (email) {
      member = await Member.findOne({ email: email.toLowerCase() });
    }

    // Check if user already has a series pass
    const { hasPass, registration } = checkUserSeriesPass(series, email || "");

    if (hasPass) {
      return {
        available: false,
        alreadyRegistered: true,
        registration: {
          ticketType: registration.ticketType,
          registeredAt: registration.registeredAt,
          eventsIncluded: registration.eventRegistrations?.length || 0,
        },
        message: "You already have a pass for this series",
      };
    }

    // Calculate pricing for user
    const ticketInfo = calculateSeriesTicketPrice(series, member);

    if (!ticketInfo) {
      return {
        available: false,
        message: "No series passes available for your membership status",
      };
    }

    // Check availability
    const availability = checkSeriesTicketAvailability(
      series,
      ticketInfo.ticketType,
    );

    return {
      available: availability.available,
      ticket: {
        type: ticketInfo.ticketType,
        name: ticketInfo.name,
        description: ticketInfo.description,
        price: ticketInfo.price,
        currency: ticketInfo.currency,
        isFree: ticketInfo.isFree,
        isEarlyBird: ticketInfo.isEarlyBird,
      },
      availability: {
        remaining: availability.remaining,
        unlimited: availability.remaining === null,
        waitlistAvailable: availability.waitlistAvailable,
      },
      series: {
        id: series.id,
        title: series.title,
        totalEvents: series.totalEvents,
        type: series.type,
      },
      memberInfo: member
        ? {
            isMember: true,
            circle: member.circle,
            name: member.name,
          }
        : {
            isMember: false,
          },
    };
  } catch (error) {
    console.error("Error checking series ticket availability:", error);
    throw createError({
      statusCode: error.statusCode || 500,
      statusMessage:
        error.statusMessage || "Failed to check series ticket availability",
    });
  }
});