// High-level booking confirmation email sender.

import { db, dbGet, dbAll, events, tickets } from '../../db/index.js';
import { eq } from 'drizzle-orm';
import { sendTemplateEmail } from './templateService.js';
import { formatDate, formatTime, formatCurrency, getSiteTimezone } from './formatting.js';

/**
 * Send booking confirmation email
 * Supports multi-ticket bookings - includes all tickets in the booking
 */
export async function sendBookingConfirmation(ticketId: string): Promise<{ success: boolean; error?: string }> {
  // Get ticket with event info
  const ticket = await dbGet<any>(
    (db as any)
      .select()
      .from(tickets)
      .where(eq((tickets as any).id, ticketId))
  );

  if (!ticket) {
    return { success: false, error: 'Ticket not found' };
  }

  const event = await dbGet<any>(
    (db as any)
      .select()
      .from(events)
      .where(eq((events as any).id, ticket.eventId))
  );

  if (!event) {
    return { success: false, error: 'Event not found' };
  }

  // Get all tickets in this booking (if multi-ticket)
  let allTickets: any[] = [ticket];
  if (ticket.bookingId) {
    allTickets = await dbAll(
      (db as any)
        .select()
        .from(tickets)
        .where(eq((tickets as any).bookingId, ticket.bookingId))
    );
  }

  const ticketCount = allTickets.length;
  const locale = ticket.preferredLanguage || 'en';
  const eventTitle = locale === 'es' && event.titleEs ? event.titleEs : event.title;

  // Generate ticket PDF URL (primary ticket, or use combined endpoint for multi)
  const apiUrl = process.env.API_URL || 'http://localhost:3001';
  const ticketPdfUrl = ticketCount > 1 && ticket.bookingId
    ? `${apiUrl}/api/tickets/booking/${ticket.bookingId}/pdf`
    : `${apiUrl}/api/tickets/${ticket.id}/pdf`;

  const attendeeFullName = `${ticket.attendeeFirstName} ${ticket.attendeeLastName || ''}`.trim();

  // Build attendee list for multi-ticket emails
  const attendeeNames = allTickets.map(t =>
    `${t.attendeeFirstName} ${t.attendeeLastName || ''}`.trim()
  ).join(', ');

  // Calculate total price for multi-ticket bookings
  const totalPrice = event.price * ticketCount;

  // Get site timezone for proper date/time formatting
  const timezone = await getSiteTimezone();

  return sendTemplateEmail({
    templateSlug: 'booking-confirmation',
    to: ticket.attendeeEmail,
    toName: attendeeFullName,
    locale,
    eventId: event.id,
    variables: {
      attendeeName: attendeeFullName,
      attendeeEmail: ticket.attendeeEmail,
      ticketId: ticket.id,
      bookingId: ticket.bookingId || ticket.id,
      qrCode: ticket.qrCode || '',
      ticketPdfUrl,
      eventTitle,
      eventDate: formatDate(event.startDatetime, locale, timezone),
      eventTime: formatTime(event.startDatetime, locale, timezone),
      eventLocation: event.location,
      eventLocationUrl: event.locationUrl || '',
      eventPrice: formatCurrency(event.price, event.currency),
      // Multi-ticket specific variables
      ticketCount: ticketCount.toString(),
      totalPrice: formatCurrency(totalPrice, event.currency),
      attendeeNames,
      isMultiTicket: ticketCount > 1 ? 'true' : 'false',
    },
  });
}