const EventTicket = require('../../models/EventTicket');
const { generateConciergeResponse } = require('../conciergeCall2.service');

function formatPrice(ticket) {
  const minor = ticket?.basePriceMinor;
  if (minor == null || Number.isNaN(Number(minor))) return null;
  const major = Number(minor) / 100;
  if (major === 0) return 'Free';
  const currency = (ticket.currency || 'INR').toUpperCase();
  return `${currency} ${major.toFixed(2)}`;
}

/**
 * ticket_pricing: cards-first. Return deterministic ticket cards from the
 * EventTicket collection. If there are no active tickets, fall back to Call 2
 * for any policy/FAQ answer grounded in the event knowledge base.
 */
module.exports = async function ticketingHandler({ plan, bot, event, session, turnLog }) {
  let tickets = [];
  try {
    tickets = await EventTicket.find({ event: bot.event, isActive: true })
      .sort({ sortOrder: 1, name: 1 })
      .lean();
  } catch (err) {
    console.warn('[concierge][ticketing] ticket load failed:', err?.message || err);
  }

  if (Array.isArray(tickets) && tickets.length) {
    const cards = tickets.slice(0, 6).map((t) => ({
      type: 'ticket',
      data: {
        ticketId: String(t._id),
        name: t.name,
        price: formatPrice(t),
        currency: (t.currency || 'INR').toUpperCase(),
        description: t.description || '',
        keyPoints: Array.isArray(t.keyPoints) ? t.keyPoints.slice(0, 5) : [],
      },
    }));

    return {
      reply: `Here are the ticket options for ${event?.name || 'this event'}.`,
      cards,
      usedCall2: false,
    };
  }

  const call2 = await generateConciergeResponse({ bot, event, session, plan, turnLog });
  return { reply: call2.reply, usedCall2: true, usage: call2.usage, modelId: call2.modelId };
};