import type { Article } from '@/types/nostr'

/**
 * Extract presentation data from article content
 * Supports two formats:
 * 1. Old format: "${presentation}\n\n---\n\nDescription du contenu :\n${contentDescription}"
 * 2. New format: "Nouveau profil publié sur zapwall.fr\n<url>\n<photo>\nPrésentation personnelle : <presentation>\nDescription de votre contenu : <description>\nAdresse Bitcoin mainnet (pour le sponsoring) : <adresse>\n\n---\n\n[Metadata JSON]\n<json>"
 * The profile JSON is stored in the [Metadata JSON] section of the content, not in tags
 */
export function extractPresentationData(presentation: Article): {
  presentation: string
  contentDescription: string
} {
  const content = presentation.content

  // Try new format first
  const newFormatMatch = content.match(/Présentation personnelle : (.+?)(?:\nDescription de votre contenu :|$)/s)
  const descriptionMatch = content.match(/Description de votre contenu : (.+?)(?:\nAdresse Bitcoin mainnet|$)/s)

  if (newFormatMatch && descriptionMatch) {
    return {
      presentation: newFormatMatch[1].trim(),
      contentDescription: descriptionMatch[1].trim(),
    }
  }

  // Try to extract from JSON metadata section
  const jsonMatch = content.match(/\[Metadata JSON\]\n(.+)$/s)
  if (jsonMatch) {
    try {
      const profileJson = JSON.parse(jsonMatch[1].trim())
      if (profileJson.presentation && profileJson.contentDescription) {
        return {
          presentation: profileJson.presentation,
          contentDescription: profileJson.contentDescription,
        }
      }
    } catch (e) {
      // JSON parsing failed, continue with old format
    }
  }

  // Fallback to old format
  const separator = '\n\n---\n\nDescription du contenu :\n'
  const separatorIndex = content.indexOf(separator)

  if (separatorIndex === -1) {
    // Fallback: return content as presentation if separator not found
    return {
      presentation: content,
      contentDescription: '',
    }
  }

  const presentationText = content.substring(0, separatorIndex)
  const contentDescription = content.substring(separatorIndex + separator.length)

  return {
    presentation: presentationText,
    contentDescription,
  }
}