export const dynamic = 'force-dynamic'

import Link from 'next/link'
import { redirect } from 'next/navigation'
import { asAdmin } from '@/lib/db/with-user'
import { getSession } from '@/lib/auth/get-session'
import { users, sites, zones, trucks } from '@/lib/db/schema'
import { desc, asc } from 'drizzle-orm'
import { UserManager, type AdminUser, type SiteOption } from '@/components/admin/user-manager'
import { SiteZoneManager, type SiteWithZones } from '@/components/admin/site-zone-manager'
import { TruckManager, type Truck } from '@/components/admin/truck-manager'

export default async function AdminHome() {
  const session = await getSession()
  if (!session) redirect('/login')
  if (session.role !== 'admin') redirect('/login')

  const [userRows, siteRows, zoneRows, truckRows] = await Promise.all([
    asAdmin(db => db.select({
      id: users.id, name: users.name, email: users.email, role: users.role,
      department: users.department, siteId: users.siteId, active: users.active,
    }).from(users).orderBy(desc(users.createdAt))),
    asAdmin(db => db.select({
      id: sites.id, name: sites.name, address: sites.address, active: sites.active,
    }).from(sites).orderBy(asc(sites.name))),
    asAdmin(db => db.select({
      id: zones.id, siteId: zones.siteId, name: zones.name,
      qrCodeToken: zones.qrCodeToken, active: zones.active,
    }).from(zones)),
    asAdmin(db => db.select({
      id: trucks.id, truckNo: trucks.truckNo, carrier: trucks.carrier, active: trucks.active,
    }).from(trucks).orderBy(asc(trucks.truckNo))),
  ])

  const adminUsers: AdminUser[] = userRows.map(u => ({
    id: u.id,
    name: u.name,
    email: u.email,
    role: u.role,
    department: u.department ?? null,
    site_id: u.siteId ?? null,
    active: u.active,
  }))

  const sitesWithZones: SiteWithZones[] = siteRows.map(s => ({
    id: s.id,
    name: s.name,
    address: s.address ?? null,
    active: s.active,
    zones: zoneRows
      .filter(z => z.siteId === s.id)
      .map(z => ({ id: z.id, name: z.name, qr_code_token: z.qrCodeToken, active: z.active })),
  }))

  const siteOptions: SiteOption[] = siteRows.map(s => ({ id: s.id, name: s.name }))

  const truckList: Truck[] = truckRows.map(t => ({
    id: t.id,
    truck_no: t.truckNo,
    carrier: t.carrier ?? null,
    active: t.active,
  }))

  return (
    <main className="max-w-4xl mx-auto px-4 py-6 space-y-6">
      <div className="flex items-center justify-between">
        <h1 className="text-2xl font-bold text-gray-900">Admin</h1>
        <nav className="flex gap-3 text-sm">
          <Link href="/hse/dashboard" className="text-blue-600 hover:underline">HSE Dashboard</Link>
          <Link href="/hse/incidents" className="text-blue-600 hover:underline">Incidents</Link>
          <Link href="/hse/capa" className="text-blue-600 hover:underline">CAPA</Link>
          <Link href="/management" className="text-blue-600 hover:underline">Management</Link>
        </nav>
      </div>
      <UserManager users={adminUsers} sites={siteOptions} />
      <SiteZoneManager sites={sitesWithZones} />
      <TruckManager trucks={truckList} />
    </main>
  )
}