export const dynamic = 'force-dynamic'

import { notFound, redirect } from 'next/navigation'
import Link from 'next/link'
import { asAdmin } from '@/lib/db/with-user'
import { getSession } from '@/lib/auth/get-session'
import { incidents, investigations } from '@/lib/db/schema'
import { eq, desc } from 'drizzle-orm'
import { InvestigationForm } from '@/components/incidents/investigation-form'

interface Props {
  params: Promise<{ id: string }>
}

export default async function InvestigationPage({ params }: Props) {
  const { id } = await params
  const session = await getSession()
  if (!session) redirect(`/login?redirect=/hse/incidents/${id}/investigation`)
  if (!['hse', 'admin'].includes(session.role)) redirect('/hse/incidents')

  const [incident] = await asAdmin(db =>
    db.select({
      id: incidents.id,
      referenceNo: incidents.referenceNo,
      status: incidents.status,
    })
    .from(incidents)
    .where(eq(incidents.id, id))
    .limit(1)
  )

  if (!incident) notFound()
  if (!['triaged', 'investigating'].includes(incident.status))
    redirect(`/hse/incidents/${id}`)

  const [existing] = await asAdmin(db =>
    db.select({ id: investigations.id })
    .from(investigations)
    .where(eq(investigations.incidentId, id))
    .orderBy(desc(investigations.createdAt))
    .limit(1)
  )

  return (
    <main className="max-w-2xl mx-auto px-4 py-6">
      <Link href={`/hse/incidents/${id}`} className="text-sm text-blue-600 hover:underline mb-4 inline-block">
        ← Back to incident
      </Link>
      <h1 className="text-xl font-bold text-gray-900 mb-1">Investigation Workspace</h1>
      <p className="text-sm text-gray-500 mb-6">{incident.referenceNo ?? id}</p>
      <InvestigationForm
        incidentId={id}
        existingInvestigationId={existing?.id ?? null}
      />
    </main>
  )
}