import { nostrService } from './nostr'
import { createArticleInvoice, createPreviewEvent } from './articleInvoice'
import { storePrivateContent, getStoredPrivateContent } from './articleStorage'
import { buildTags } from './nostrTagSystem'
import { PLATFORM_SERVICE } from './platformConfig'
import { generateSeriesHashId, generatePublicationHashId } from './hashIdGenerator'
import type { ArticleDraft, PublishedArticle } from './articlePublisher'
import type { AlbyInvoice } from '@/types/alby'
import type { Review, Series } from '@/types/nostr'

export interface ArticleUpdateResult extends PublishedArticle {
  originalArticleId: string
}

function ensureKeys(authorPubkey: string, authorPrivateKey?: string): void {
  nostrService.setPublicKey(authorPubkey)
  if (authorPrivateKey) {
    nostrService.setPrivateKey(authorPrivateKey)
  } else if (!nostrService.getPrivateKey()) {
    throw new Error('Private key required for signing. Connect a wallet that can sign.')
  }
}

function requireCategory(category?: ArticleDraft['category']): asserts category is NonNullable<ArticleDraft['category']> {
  if (category !== 'science-fiction' && category !== 'scientific-research') {
    throw new Error('Vous devez sélectionner une catégorie (science-fiction ou recherche scientifique).')
  }
}

async function ensurePresentation(authorPubkey: string): Promise<string> {
  const presentation = await articlePublisher.getAuthorPresentation(authorPubkey)
  if (!presentation) {
    throw new Error('Vous devez créer un article de présentation avant de publier des articles.')
  }
  return presentation.id
}

async function publishPreviewWithInvoice(
  draft: ArticleDraft,
  invoice: AlbyInvoice,
  authorPubkey: string,
  presentationId: string,
  extraTags?: string[][]
): Promise<import('nostr-tools').Event | null> {
  const previewEvent = await createPreviewEvent(draft, invoice, authorPubkey, presentationId, extraTags)
  const publishedEvent = await nostrService.publishEvent(previewEvent)
  return publishedEvent ?? null
}

export async function publishSeries(params: {
  title: string
  description: string
  preview?: string
  coverUrl?: string
  category: ArticleDraft['category']
  authorPubkey: string
  authorPrivateKey?: string
}): Promise<Series> {
  ensureKeys(params.authorPubkey, params.authorPrivateKey)
  const {category} = params
  requireCategory(category)
  const event = await buildSeriesEvent(params, category)
  const published = await nostrService.publishEvent(event)
  if (!published) {
    throw new Error('Failed to publish series')
  }
  return {
    id: published.id,
    pubkey: params.authorPubkey,
    title: params.title,
    description: params.description,
    preview: params.preview ?? params.description.substring(0, 200),
    category,
    ...(params.coverUrl ? { coverUrl: params.coverUrl } : {}),
    kindType: 'series',
  }
}

async function buildSeriesEvent(
  params: {
    title: string
    description: string
    preview?: string
    coverUrl?: string
    authorPubkey: string
  },
  category: NonNullable<ArticleDraft['category']>
) {
  // Map category to new system
  const newCategory = category === 'science-fiction' ? 'sciencefiction' : 'research'

  // Generate hash ID from series data
  const hashId = await generateSeriesHashId({
    pubkey: params.authorPubkey,
    title: params.title,
    description: params.description,
    category: newCategory,
    coverUrl: params.coverUrl ?? undefined,
  })

  // Build JSON metadata
  const seriesJson = JSON.stringify({
    type: 'series',
    pubkey: params.authorPubkey,
    title: params.title,
    description: params.description,
    preview: params.preview ?? params.description.substring(0, 200),
    coverUrl: params.coverUrl,
    category: newCategory,
    id: hashId,
    version: 0,
    index: 0,
  })

  const tags = buildTags({
    type: 'series',
    category: newCategory,
    id: hashId,
    service: PLATFORM_SERVICE,
    version: 0, // New object
    hidden: false,
    paywall: false,
    title: params.title,
    description: params.description,
    preview: params.preview ?? params.description.substring(0, 200),
    ...(params.coverUrl ? { coverUrl: params.coverUrl } : {}),
  })

  // Add JSON metadata as a tag
  tags.push(['json', seriesJson])

  return {
    kind: 1,
    created_at: Math.floor(Date.now() / 1000),
    content: params.preview ?? params.description.substring(0, 200),
    tags,
  }
}

export async function publishReview(params: {
  articleId: string
  seriesId: string
  category: ArticleDraft['category']
  authorPubkey: string
  reviewerPubkey: string
  content: string
  title?: string
  text?: string
  authorPrivateKey?: string
}): Promise<Review> {
  ensureKeys(params.reviewerPubkey, params.authorPrivateKey)
  const {category} = params
  requireCategory(category)
  const event = await buildReviewEvent(params, category)
  const published = await nostrService.publishEvent(event)
  if (!published) {
    throw new Error('Failed to publish review')
  }
  return {
    id: published.id,
    articleId: params.articleId,
    authorPubkey: params.authorPubkey,
    reviewerPubkey: params.reviewerPubkey,
    content: params.content,
    createdAt: published.created_at,
    ...(params.title ? { title: params.title } : {}),
    ...(params.text ? { text: params.text } : {}),
    kindType: 'review',
  }
}

async function buildReviewEvent(
  params: {
    articleId: string
    seriesId: string
    authorPubkey: string
    reviewerPubkey: string
    content: string
    title?: string
    text?: string
  },
  category: NonNullable<ArticleDraft['category']>
) {
  // Map category to new system
  const newCategory = category === 'science-fiction' ? 'sciencefiction' : 'research'

  // Generate hash ID from review data
  const { generateReviewHashId } = await import('./hashIdGenerator')
  const hashId = await generateReviewHashId({
    pubkey: params.reviewerPubkey,
    articleId: params.articleId,
    reviewerPubkey: params.reviewerPubkey,
    content: params.content,
    ...(params.title ? { title: params.title } : {}),
  })

  // Build JSON metadata
  const reviewJson = JSON.stringify({
    type: 'review',
    pubkey: params.reviewerPubkey,
    articleId: params.articleId,
    reviewerPubkey: params.reviewerPubkey,
    content: params.content,
    title: params.title,
    category: newCategory,
    id: hashId,
    version: 0,
    index: 0,
  })

  const tags = buildTags({
    type: 'quote',
    category: newCategory,
    id: hashId,
    service: PLATFORM_SERVICE,
    version: 0, // New object
    hidden: false,
    paywall: false,
    articleId: params.articleId,
    reviewerPubkey: params.reviewerPubkey,
    ...(params.title ? { title: params.title } : {}),
  })

  // Add text tag if provided
  if (params.text) {
    tags.push(['text', params.text])
  }

  // Add JSON metadata as a tag
  tags.push(['json', reviewJson])

  return {
    kind: 1,
    created_at: Math.floor(Date.now() / 1000),
    content: params.content,
    tags,
  }
}

async function buildUpdateTags(
  draft: ArticleDraft,
  originalArticleId: string,
  newCategory: 'sciencefiction' | 'research',
  authorPubkey: string,
  currentVersion: number = 0
) {
  // Generate hash ID from publication data
  const hashId = await generatePublicationHashId({
    pubkey: authorPubkey,
    title: draft.title,
    preview: draft.preview,
    category: newCategory,
    seriesId: draft.seriesId ?? undefined,
    bannerUrl: draft.bannerUrl ?? undefined,
    zapAmount: draft.zapAmount,
  })

  // Increment version for update
  const nextVersion = currentVersion + 1

  const updateTags = buildTags({
    type: 'publication',
    category: newCategory,
    id: hashId,
    service: PLATFORM_SERVICE,
    version: nextVersion,
    hidden: false,
    paywall: true,
    title: draft.title,
    preview: draft.preview,
    zapAmount: draft.zapAmount,
    ...(draft.seriesId ? { seriesId: draft.seriesId } : {}),
    ...(draft.bannerUrl ? { bannerUrl: draft.bannerUrl } : {}),
  })
  updateTags.push(['e', originalArticleId], ['replace', 'article-update'])
  return updateTags
}

async function publishUpdate(
  draft: ArticleDraft,
  authorPubkey: string,
  originalArticleId: string
): Promise<ArticleUpdateResult> {
  const {category} = draft
  requireCategory(category)
  const presentationId = await ensurePresentation(authorPubkey)
  const invoice = await createArticleInvoice(draft)
  const newCategory = category === 'science-fiction' ? 'sciencefiction' : 'research'
  const updateTags = await buildUpdateTags(draft, originalArticleId, newCategory, authorPubkey)

  const publishedEvent = await publishPreviewWithInvoice(draft, invoice, authorPubkey, presentationId, updateTags)
  if (!publishedEvent) {
    return updateFailure(originalArticleId, 'Failed to publish article update')
  }
  await storePrivateContent(publishedEvent.id, draft.content, authorPubkey, invoice)
  return {
    articleId: publishedEvent.id,
    previewEventId: publishedEvent.id,
    invoice,
    success: true,
    originalArticleId,
  }
}

export async function publishArticleUpdate(
  originalArticleId: string,
  draft: ArticleDraft,
  authorPubkey: string,
  authorPrivateKey?: string
): Promise<ArticleUpdateResult> {
  try {
    ensureKeys(authorPubkey, authorPrivateKey)
    return publishUpdate(draft, authorPubkey, originalArticleId)
  } catch (error) {
    return updateFailure(originalArticleId, error instanceof Error ? error.message : 'Unknown error')
  }
}

function updateFailure(originalArticleId: string, error?: string): ArticleUpdateResult {
  return {
    articleId: '',
    previewEventId: '',
    success: false,
    originalArticleId,
    ...(error ? { error } : {}),
  }
}

export async function deleteArticleEvent(articleId: string, authorPubkey: string, authorPrivateKey?: string): Promise<void> {
  ensureKeys(authorPubkey, authorPrivateKey)
  const deleteEvent = {
    kind: 5,
    created_at: Math.floor(Date.now() / 1000),
    tags: [['e', articleId]] as string[][],
    content: 'deleted',
  } as const
  const published = await nostrService.publishEvent(deleteEvent)
  if (!published) {
    throw new Error('Failed to publish delete event')
  }
}

// Re-export for convenience to avoid circular imports in hooks
import { articlePublisher } from './articlePublisher'
export const getStoredContent = getStoredPrivateContent