import { NextRequest, NextResponse } from 'next/server'
import prisma from '@/lib/prisma'
import { auth } from '@/auth'

function extractBlockContent(html: string, blockId: string): string | null {
  const regex = new RegExp(
    `<(?:p|h[1-6]|blockquote)[^>]*data-id="${blockId}"[^>]*>([\\s\\S]*?)<\\/(?:p|h[1-6]|blockquote)>`,
    'i'
  )
  const match = regex.exec(html)
  if (!match) return null
  return match[1].replace(/<[^>]+>/g, '').trim()
}

// GET /api/blocks/[blockId]/status?sourceNoteId=xxx
export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ blockId: string }> }
) {
  const session = await auth()
  if (!session?.user?.id) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
  }

  const { blockId } = await params
  const sourceNoteId = request.nextUrl.searchParams.get('sourceNoteId')

  if (!sourceNoteId) {
    return NextResponse.json({ error: 'sourceNoteId required' }, { status: 400 })
  }

  const note = await prisma.note.findFirst({
    where: { id: sourceNoteId, userId: session.user.id },
    select: { id: true, title: true, content: true },
  })

  if (!note) {
    return NextResponse.json({ exists: false, content: '', sourceNoteTitle: '' })
  }

  const content = extractBlockContent(note.content, blockId)

  if (content === null) {
    return NextResponse.json({ exists: false, content: '', sourceNoteTitle: note.title || '' })
  }

  return NextResponse.json({
    exists: true,
    content,
    sourceNoteTitle: note.title || 'Sans titre',
  })
}