import { NextRequest, NextResponse } from 'next/server'
import prisma from '@/lib/prisma'
import { auth } from '@/auth'
import { verifyParticipant } from '@/lib/brainstorm-collab'

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

  try {
    const { sessionId } = await params
    const { isParticipant } = await verifyParticipant(sessionId, session.user.id)

    if (!isParticipant) {
      return NextResponse.json({ error: 'Not a participant' }, { status: 403 })
    }

    const activities = await prisma.brainstormActivity.findMany({
      where: { sessionId },
      orderBy: { createdAt: 'desc' },
      take: 50,
      include: {
        user: { select: { id: true, name: true, image: true } },
      },
    })

    return NextResponse.json({
      success: true,
      data: activities.map(a => ({
        id: a.id,
        action: a.action,
        details: a.details ? JSON.parse(a.details) : null,
        createdAt: a.createdAt,
        user: a.user ? { name: a.user.name, image: a.user.image } : null,
      })),
    })
  } catch (error) {
    console.error('Error fetching activity:', error)
    return NextResponse.json({ error: 'Failed to fetch activity' }, { status: 500 })
  }
}