import { createHash } from 'crypto'
import { useDb } from '../../utils/db'

export default defineEventHandler((event) => {
  const db = useDb()
  const id = getRouterParam(event, 'id')
  const ip = getRequestIP(event, { xForwardedFor: true }) || 'unknown'
  const voterHash = createHash('sha256').update(ip + ':' + id).digest('hex')

  try {
    db.prepare('INSERT INTO vote_log (idea_id, voter_hash) VALUES (?, ?)').run(id, voterHash)
    db.prepare('UPDATE ideas SET votes = votes + 1 WHERE id = ?').run(id)
  } catch {
    throw createError({ statusCode: 409, statusMessage: 'Already voted' })
  }

  const row = db.prepare('SELECT votes FROM ideas WHERE id = ?').get(id) as any
  return { votes: row?.votes ?? 0 }
})