import { SITE_SOCIAL_SAME_AS } from '@/constants/contact'

/**
 * Renders a `<script type="application/ld+json">` block. Server component
 * only — do not add `'use client'` here (JSON-LD needs to be in the
 * initial HTML for crawlers, not injected client-side).
 */
interface JsonLdProps {
  data: Record<string, unknown>
}

export const ORGANIZATION_ID = 'https://ghabilee.ir/#organization'
export const WEBSITE_ID = 'https://ghabilee.ir/#website'

const JsonLd = ({ data }: JsonLdProps) => (
  <script
    dangerouslySetInnerHTML={{ __html: JSON.stringify(data).replace(/</g, '\\u003c') }}
    type="application/ld+json"
  />
)

export default JsonLd

export function organizationSchema({
  url,
  logo,
  telephone,
  address,
  description,
}: {
  url: string
  logo: string
  telephone: string
  address: { locality: string; streetAddress: string }
  description?: string
}) {
  return {
    '@context': 'https://schema.org',
    '@type': 'Organization',
    '@id': ORGANIZATION_ID,
    name: 'قبیله',
    alternateName: 'Ghabilee',
    url,
    telephone,
    logo,
    ...(description ? { description } : {}),
    sameAs: [...SITE_SOCIAL_SAME_AS],
    address: {
      '@type': 'PostalAddress',
      addressCountry: 'IR',
      addressLocality: address.locality,
      streetAddress: address.streetAddress,
    },
    contactPoint: {
      '@type': 'ContactPoint',
      telephone,
      contactType: 'customer support',
      areaServed: 'IR',
      availableLanguage: ['fa', 'Persian'],
    },
  }
}

export function webSiteSchema(url: string) {
  return {
    '@context': 'https://schema.org',
    '@type': 'WebSite',
    '@id': WEBSITE_ID,
    name: 'قبیله',
    alternateName: 'Ghabilee',
    inLanguage: 'fa-IR',
    url,
    publisher: { '@id': ORGANIZATION_ID },
  }
}

export function breadcrumbList(items: { name: string; url: string }[], siteUrl: string) {
  return {
    '@context': 'https://schema.org',
    '@type': 'BreadcrumbList',
    itemListElement: items.map((item, index) => ({
      '@type': 'ListItem',
      position: index + 1,
      name: item.name,
      item: `${siteUrl}${item.url}`,
    })),
  }
}

export function collectionPage(name: string, description: string, url: string) {
  return {
    '@context': 'https://schema.org',
    '@type': 'CollectionPage',
    name,
    description,
    url,
  }
}

export function faqPage(items: readonly { question: string; answer: string }[]) {
  return {
    '@context': 'https://schema.org',
    '@type': 'FAQPage',
    mainEntity: items.map((item) => ({
      '@type': 'Question',
      name: item.question,
      acceptedAnswer: { '@type': 'Answer', text: item.answer },
    })),
  }
}

interface EventSchemaParams {
  name: string
  description: string | null
  startDate: string
  endDate: string
  url: string
  image?: string
  /** Exact street address. Null/blank on public pages when `addressVisibility` is `attendees_only`. */
  address?: string | null
  /** Coarse public location shown instead of the exact address for anonymous crawlers. */
  generalArea?: string | null
  cityName?: string | null
  isFree: boolean
  price: number
}

function nonempty(value: string | null | undefined): string | undefined {
  const trimmed = value?.trim()

  return trimmed ? trimmed : undefined
}

/**
 * Google Event rich results require `location.address` as a `PostalAddress`
 * object, not a string. Anonymous crawlers never receive the exact street
 * address when the host hid it; `generalArea` + city is the public location.
 */
function eventLocation(params: Pick<EventSchemaParams, 'address' | 'generalArea' | 'cityName'>) {
  const cityName = nonempty(params.cityName)
  const streetAddress = nonempty(params.address) ?? nonempty(params.generalArea)

  return {
    '@type': 'Place' as const,
    name: cityName ?? streetAddress,
    address: {
      '@type': 'PostalAddress' as const,
      ...(streetAddress ? { streetAddress } : {}),
      ...(cityName ? { addressLocality: cityName } : {}),
      addressCountry: 'IR',
    },
  }
}

/** `Event` schema for canonical `/e/[slug]` rich results. */
export function eventSchema(params: EventSchemaParams) {
  return {
    '@context': 'https://schema.org',
    '@type': 'Event',
    name: params.name,
    url: params.url,
    description: params.description ?? undefined,
    startDate: params.startDate,
    endDate: params.endDate,
    eventAttendanceMode: 'https://schema.org/OfflineEventAttendanceMode',
    eventStatus: 'https://schema.org/EventScheduled',
    location: eventLocation(params),
    image: params.image ? [params.image] : undefined,
    offers: {
      '@type': 'Offer',
      // Product prices are stored in toman; Schema.org's IRR value is rial.
      price: params.isFree ? 0 : params.price * 10,
      priceCurrency: 'IRR',
      availability: 'https://schema.org/InStock',
      url: params.url,
    },
  }
}