fairreview/src/app/api/reviews/[id]/vote/route.ts

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

export async function POST(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  const session = await auth()

  if (!session?.user?.id) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
  }

  const resolvedParams = await params
  const { voteType } = await request.json()

  if (voteType !== 1 && voteType !== -1) {
    return NextResponse.json({ error: 'Invalid vote type' }, { status: 400 })
  }

  const review = await prisma.review.findUnique({
    where: { id: resolvedParams.id }
  })

  if (!review) {
    return NextResponse.json({ error: 'Review not found' }, { status: 404 })
  }

  const existingVote = await prisma.vote.findUnique({
    where: {
      user_review_unique: {
        userId: session.user.id,
        reviewId: resolvedParams.id
      }
    }
  })

  if (existingVote) {
    if (existingVote.voteType === voteType) {
      await prisma.vote.delete({
        where: { id: existingVote.id }
      })
    } else {
      await prisma.vote.update({
        where: { id: existingVote.id },
        data: { voteType: voteType }
      })
    }
  } else {
    await prisma.vote.create({
      data: {
        userId: session.user.id,
        reviewId: resolvedParams.id,
        voteType: voteType
      }
    })
  }

  return NextResponse.json({ success: true })
}