import { ITopic } from '@/models/topic'

interface ArticleStructuredData {
  title: string
  description: string
  image: string
  publishedTime: string
  authorName: string
  url: string
  readingTime?: string
  tags?: string[]
}

export function generateArticleStructuredData({
  title,
  description,
  image,
  publishedTime,
  authorName,
  url,
  readingTime,
  tags = [],
}: ArticleStructuredData): string {
  const baseUrl = process.env.NEXT_PUBLIC_APP_URL || 'https://siliconpin.com'
  
  const structuredData = {
    '@context': 'https://schema.org',
    '@type': 'Article',
    headline: title,
    description: description,
    image: {
      '@type': 'ImageObject',
      url: image.startsWith('http') ? image : `${baseUrl}${image}`,
      width: 800,
      height: 450,
    },
    author: {
      '@type': 'Person',
      name: authorName,
    },
    publisher: {
      '@type': 'Organization',
      name: 'SiliconPin',
      logo: {
        '@type': 'ImageObject',
        url: `${baseUrl}/favicon.ico`,
        width: 32,
        height: 32,
      },
    },
    datePublished: publishedTime,
    dateModified: publishedTime,
    mainEntityOfPage: {
      '@type': 'WebPage',
      '@id': `${baseUrl}${url}`,
    },
    url: `${baseUrl}${url}`,
    ...(readingTime && {
      timeRequired: readingTime,
    }),
    ...(tags.length > 0 && {
      keywords: tags.join(', '),
      about: tags.map(tag => ({
        '@type': 'Thing',
        name: tag,
      })),
    }),
  }

  return JSON.stringify(structuredData, null, 2)
}

export function generateTopicListingStructuredData(topics: ITopic[]): string {
  const baseUrl = process.env.NEXT_PUBLIC_APP_URL || 'https://siliconpin.com'
  
  const structuredData = {
    '@context': 'https://schema.org',
    '@type': 'Topic',
    name: 'SiliconPin Topics',
    description: 'Technical articles, tutorials, and insights from the SiliconPin community',
    url: `${baseUrl}/topics`,
    publisher: {
      '@type': 'Organization',
      name: 'SiliconPin',
      logo: {
        '@type': 'ImageObject',
        url: `${baseUrl}/favicon.ico`,
        width: 32,
        height: 32,
      },
    },
    topicPost: topics.slice(0, 10).map(topic => ({
      '@type': 'TopicPosting',
      headline: topic.title,
      description: topic.excerpt,
      url: `${baseUrl}/topics/${topic.slug}`,
      datePublished: new Date(topic.publishedAt).toISOString(),
      author: {
        '@type': 'Person',
        name: topic.author,
      },
      image: {
        '@type': 'ImageObject',
        url: topic.coverImage.startsWith('http') ? topic.coverImage : `${baseUrl}${topic.coverImage}`,
        width: 800,
        height: 450,
      },
      keywords: topic.tags.map(tag => tag.name).join(', '),
    })),
  }

  return JSON.stringify(structuredData, null, 2)
}

export function generateWebsiteStructuredData(): string {
  const baseUrl = process.env.NEXT_PUBLIC_APP_URL || 'https://siliconpin.com'
  
  const structuredData = {
    '@context': 'https://schema.org',
    '@type': 'WebSite',
    name: 'SiliconPin',
    description: 'Modern web hosting and cloud solutions with integrated topic platform',
    url: baseUrl,
    potentialAction: {
      '@type': 'SearchAction',
      target: {
        '@type': 'EntryPoint',
        urlTemplate: `${baseUrl}/search?q={search_term_string}`,
      },
      'query-input': 'required name=search_term_string',
    },
    publisher: {
      '@type': 'Organization',
      name: 'SiliconPin',
      logo: {
        '@type': 'ImageObject',
        url: `${baseUrl}/favicon.ico`,
        width: 32,
        height: 32,
      },
    },
  }

  return JSON.stringify(structuredData, null, 2)
}

export function generateBreadcrumbStructuredData(items: Array<{ name: string; url: string }>): string {
  const baseUrl = process.env.NEXT_PUBLIC_APP_URL || 'https://siliconpin.com'
  
  const structuredData = {
    '@context': 'https://schema.org',
    '@type': 'BreadcrumbList',
    itemListElement: items.map((item, index) => ({
      '@type': 'ListItem',
      position: index + 1,
      name: item.name,
      item: item.url.startsWith('http') ? item.url : `${baseUrl}${item.url}`,
    })),
  }

  return JSON.stringify(structuredData, null, 2)
}