import type { Event } from 'nostr-tools'
import type { Purchase } from '@/types/nostr'
import { buildTags } from '../nostrTagSystem'
import { PLATFORM_SERVICE } from '../platformConfig'
import { generatePurchaseHashId } from '../hashIdGenerator'
import { buildObjectId } from '../urlGenerator'
import { buildPaymentNoteTemplate, mapPaymentCategory, type PaymentCategoryTag, publishPaymentNoteToRelays } from './shared'

export async function publishPurchaseNote(params: {
  articleId: string
  authorPubkey: string
  payerPubkey: string
  amount: number
  paymentHash: string
  zapReceiptId?: string
  category?: 'science-fiction' | 'scientific-research'
  seriesId?: string
  payerPrivateKey: string
}): Promise<Event | null> {
  const category = mapPaymentCategory(params.category)
  const payload = await buildPurchaseNotePayload({ ...params, category })
  return publishPaymentNoteToRelays({
    payerPrivateKey: params.payerPrivateKey,
    objectType: 'purchase',
    hash: payload.hashId,
    eventTemplate: payload.eventTemplate,
    parsed: payload.parsedPurchase,
    version: 0,
    hidden: false,
    index: 0,
  })
}

async function buildPurchaseNotePayload(params: {
  articleId: string
  authorPubkey: string
  payerPubkey: string
  amount: number
  paymentHash: string
  zapReceiptId?: string
  category: PaymentCategoryTag
  seriesId?: string
}): Promise<{ hashId: string; eventTemplate: import('nostr-tools').EventTemplate; parsedPurchase: Purchase }> {
  const purchaseData = {
    payerPubkey: params.payerPubkey,
    articleId: params.articleId,
    authorPubkey: params.authorPubkey,
    amount: params.amount,
    paymentHash: params.paymentHash,
    ...(params.seriesId ? { seriesId: params.seriesId } : {}),
  }
  const hashId = await generatePurchaseHashId(purchaseData)
  const id = buildObjectId(hashId, 0, 0)
  const tags = buildPurchaseNoteTags({ ...params, hashId })
  tags.push(['json', JSON.stringify({ type: 'purchase', id, hash: hashId, version: 0, index: 0, ...purchaseData })])
  const parsedPurchase = buildParsedPurchase({ ...params, id, hashId })
  return { hashId, eventTemplate: buildPaymentNoteTemplate(tags, `Purchase confirmed: ${params.amount} sats for article ${params.articleId}`), parsedPurchase }
}

function buildPurchaseNoteTags(params: {
  articleId: string
  authorPubkey: string
  payerPubkey: string
  amount: number
  paymentHash: string
  zapReceiptId?: string
  category: PaymentCategoryTag
  seriesId?: string
  hashId: string
}): string[][] {
  return buildTags({
    type: 'payment',
    category: params.category,
    id: params.hashId,
    service: PLATFORM_SERVICE,
    version: 0,
    hidden: false,
    payment: true,
    paymentType: 'purchase',
    amount: params.amount,
    payerPubkey: params.payerPubkey,
    recipientPubkey: params.authorPubkey,
    paymentHash: params.paymentHash,
    articleId: params.articleId,
    ...(params.zapReceiptId ? { zapReceiptId: params.zapReceiptId } : {}),
    ...(params.seriesId ? { seriesId: params.seriesId } : {}),
  })
}

function buildParsedPurchase(params: {
  articleId: string
  authorPubkey: string
  payerPubkey: string
  amount: number
  paymentHash: string
  id: string
  hashId: string
  seriesId?: string
}): Purchase {
  return {
    id: params.id,
    hash: params.hashId,
    version: 0,
    index: 0,
    payerPubkey: params.payerPubkey,
    articleId: params.articleId,
    authorPubkey: params.authorPubkey,
    amount: params.amount,
    paymentHash: params.paymentHash,
    createdAt: Math.floor(Date.now() / 1000),
    ...(params.seriesId ? { seriesId: params.seriesId } : {}),
    kindType: 'purchase',
  }
}