import type { EventWizardFormData } from '@/components/events/create/types'
import { createClientId } from '@/lib/createClientId'
import type { CreatedEvent } from '@/services/events'
import type { EventFaq, EventMedia } from '@/services/eventDetail'
import { texts, format } from '@/texts'

function splitIsoToDateAndMinutes(iso: string): { date: string; minutes: number } {
  const d = new Date(iso)

  return {
    date: d.toISOString(),
    minutes: d.getHours() * 60 + d.getMinutes(),
  }
}

/**
 * Maps an existing event (plus media/FAQs) into create-wizard form values
 * so the host can tweak and submit a new event.
 */
export function mapEventToWizardCloneData(event: CreatedEvent, media: EventMedia[], faqs: EventFaq[]): EventWizardFormData {
  const start = splitIsoToDateAndMinutes(String(event.startsAt))
  const end = splitIsoToDateAndMinutes(String(event.endsAt))

  return {
    title: format(texts.events.cloneTitleSuffix, { title: event.title }),
    slug: event.slug,
    categoryId: String(event.categoryId),
    shortDescription: event.shortDescription ?? '',
    description: event.description ?? '',
    media: media
      .filter((item) => item.mediaType === 'image')
      .map((item, index) => ({
        id: createClientId(),
        url: item.url,
        isPoster: item.isPoster,
        isSquarePoster: Boolean(item.isSquarePoster),
        sortOrder: item.sortOrder ?? index,
      })),
    startDate: start.date,
    startTime: start.minutes,
    endDate: end.date,
    endTime: end.minutes,
    provinceId: String(event.provinceId),
    cityId: String(event.cityId),
    // Cloning always starts from the organizer's own event, so the backend
    // never masks address/lat/lng here (see EventsService.applyAddressVisibility)
    // -- the `?? ` fallbacks only satisfy the DTO's general nullable type.
    address: event.address ?? '',
    lat: event.lat ?? 35.6892,
    lng: event.lng ?? 51.389,
    isFree: event.isFree,
    price: event.price,
    capacity: event.capacity,
    reservedCapacity: event.reservedCapacity ?? 0,
    genderRestriction: event.genderRestriction ?? 'open',
    ageRestriction: event.ageRestriction ?? 'open',
    cancellationFeePercent: event.cancellationFeePercent,
    isDiscoverable: event.settings.isDiscoverable,
    autoCreateGroup: event.settings.autoCreateGroup,
    addressVisibility: event.settings.addressVisibility,
    generalArea: event.settings.generalArea ?? '',
    waitlistAutoOffer: event.settings.waitlistAutoOffer,
    sendReviewRequestSms: event.settings.sendReviewRequestSms ?? true,
    faqs: faqs.map((faq) => ({
      id: createClientId(),
      question: faq.question,
      answer: faq.answer,
    })),
  }
}