export const dynamic = 'force-dynamic'

import { redirect } from 'next/navigation'
import { asAdmin } from '@/lib/db/with-user'
import { getSession } from '@/lib/auth/get-session'
import { incidents, sites, zones, trucks, users } from '@/lib/db/schema'
import { eq, and, or, ilike, desc, asc, sql } from 'drizzle-orm'
import { aliasedTable } from 'drizzle-orm'
import { IncidentList, type Incident } from '@/components/incidents/incident-list'
import { Pagination } from '@/components/incidents/pagination'
import { IncidentFilters, type SiteOption, type TruckOption } from '@/components/incidents/incident-filters'

const PAGE_SIZE = 25

export default async function HseInboxPage({
  searchParams,
}: {
  searchParams: Promise<{ page?: string; q?: string; status?: string; type?: string; site_id?: string; truck_id?: string }>
}) {
  const session = await getSession()
  if (!session) redirect('/login')

  const params = await searchParams
  const page = Math.max(1, Number.parseInt(params.page ?? '1', 10) || 1)
  const from = (page - 1) * PAGE_SIZE

  const reporterAlias = aliasedTable(users, 'reporter')

  const conditions = []
  if (params.q) conditions.push(or(ilike(incidents.referenceNo, `%${params.q}%`), ilike(incidents.description, `%${params.q}%`)))
  if (params.status) conditions.push(eq(incidents.status, params.status as never))
  if (params.type) conditions.push(eq(incidents.incidentType, params.type as never))
  if (params.site_id) conditions.push(eq(incidents.siteId, params.site_id))
  if (params.truck_id) conditions.push(eq(incidents.truckId, params.truck_id))
  const where = conditions.length ? and(...conditions) : undefined

  const [[countRow], incidentRows, siteRows, truckRows] = await Promise.all([
    asAdmin(db =>
      db.select({ count: sql<number>`count(*)` })
      .from(incidents)
      .where(where)
    ),
    asAdmin(db =>
      db.select({
        id: incidents.id,
        referenceNo: incidents.referenceNo,
        incidentType: incidents.incidentType,
        status: incidents.status,
        severity: incidents.severity,
        reportedAt: incidents.reportedAt,
        siteName: sites.name,
        zoneName: zones.name,
        reporterName: reporterAlias.name,
        truckNo: trucks.truckNo,
      })
      .from(incidents)
      .leftJoin(sites, eq(incidents.siteId, sites.id))
      .leftJoin(zones, eq(incidents.zoneId, zones.id))
      .leftJoin(reporterAlias, eq(incidents.reportedBy, reporterAlias.id))
      .leftJoin(trucks, eq(incidents.truckId, trucks.id))
      .where(where)
      .orderBy(desc(incidents.reportedAt))
      .limit(PAGE_SIZE)
      .offset(from)
    ),
    asAdmin(db =>
      db.select({ id: sites.id, name: sites.name }).from(sites).orderBy(asc(sites.name))
    ),
    asAdmin(db =>
      db.select({ id: trucks.id, truckNo: trucks.truckNo })
      .from(trucks)
      .where(eq(trucks.active, true))
      .orderBy(asc(trucks.truckNo))
    ),
  ])

  const total = Number(countRow?.count ?? 0)

  const incidentList: Incident[] = incidentRows.map(r => ({
    id: r.id,
    reference_no: r.referenceNo,
    incident_type: r.incidentType,
    status: r.status,
    severity: r.severity,
    reported_at: r.reportedAt.toISOString(),
    sites: r.siteName ? { name: r.siteName } : null,
    zones: r.zoneName ? { name: r.zoneName } : null,
    trucks: r.truckNo ? { truck_no: r.truckNo } : null,
    reporter: r.reporterName ? { name: r.reporterName } : null,
  }))

  const siteOptions: SiteOption[] = siteRows.map(s => ({ id: s.id, name: s.name }))
  const truckOptions: TruckOption[] = truckRows.map(t => ({ id: t.id, truck_no: t.truckNo }))

  return (
    <main className="max-w-4xl mx-auto px-4 py-6">
      <div className="flex items-center justify-between mb-4">
        <h1 className="text-2xl font-bold text-gray-900">Incident Inbox</h1>
        <span className="text-sm text-gray-500">{total} incidents</span>
      </div>
      <IncidentFilters sites={siteOptions} trucks={truckOptions} />
      <IncidentList incidents={incidentList} basePath="/hse" />
      <Pagination page={page} pageSize={PAGE_SIZE} total={total} href="/hse/incidents" />
    </main>
  )
}