export const dynamic = 'force-dynamic'

import { notFound, redirect } from 'next/navigation'
import Link from 'next/link'
import { getSession } from '@/lib/auth/get-session'
import { asAdmin } from '@/lib/db/with-user'
import { incidents, sites, zones, trucks, users, evidenceFiles, investigations } from '@/lib/db/schema'
import { eq, and } from 'drizzle-orm'
import { aliasedTable } from 'drizzle-orm'
import { IncidentDetail, type Incident } from '@/components/incidents/incident-detail'
import { InvestigationPanel } from '@/components/incidents/investigation-panel'

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

export default async function SupervisorIncidentDetailPage({ params }: Props) {
  const { id } = await params

  const session = await getSession()
  if (!session) redirect('/login')

  const reporterAlias = aliasedTable(users, 'reporter')
  const investigatorAlias = aliasedTable(users, 'investigator')

  const [incident] = await asAdmin(db =>
    db.select({
      id: incidents.id,
      referenceNo: incidents.referenceNo,
      incidentType: incidents.incidentType,
      description: incidents.description,
      severity: incidents.severity,
      status: incidents.status,
      injuryInvolved: incidents.injuryInvolved,
      assetInvolved: incidents.assetInvolved,
      medicalStatus: incidents.medicalStatus,
      lostDays: incidents.lostDays,
      reportedAt: incidents.reportedAt,
      closedAt: incidents.closedAt,
      siteId: sites.id,
      siteName: sites.name,
      zoneId: zones.id,
      zoneName: zones.name,
      truckId: trucks.id,
      truckNo: trucks.truckNo,
      truckCarrier: trucks.carrier,
      reporterId: reporterAlias.id,
      reporterName: reporterAlias.name,
      reporterEmail: reporterAlias.email,
    })
    .from(incidents)
    .leftJoin(sites, eq(incidents.siteId, sites.id))
    .leftJoin(zones, eq(incidents.zoneId, zones.id))
    .leftJoin(trucks, eq(incidents.truckId, trucks.id))
    .leftJoin(reporterAlias, eq(incidents.reportedBy, reporterAlias.id))
    .where(eq(incidents.id, id))
    .limit(1)
  )

  if (!incident) notFound()

  const evidenceRows = await asAdmin(db =>
    db.select({
      id: evidenceFiles.id,
      stage: evidenceFiles.stage,
      fileUrl: evidenceFiles.fileUrl,
      fileType: evidenceFiles.fileType,
      uploadedAt: evidenceFiles.uploadedAt,
    })
    .from(evidenceFiles)
    .where(and(eq(evidenceFiles.incidentId, id), eq(evidenceFiles.deleted, false)))
  )

  const [inv] = await asAdmin(db =>
    db.select({
      id: investigations.id,
      method: investigations.method,
      fiveWhySteps: investigations.fiveWhySteps,
      fishboneCategories: investigations.fishboneCategories,
      findingsText: investigations.findingsText,
      rootCauseSummary: investigations.rootCauseSummary,
      alcoholTestResult: investigations.alcoholTestResult,
      urineTestResult: investigations.urineTestResult,
      witnessStatementRefs: investigations.witnessStatementRefs,
      completedAt: investigations.completedAt,
      investigatorName: investigatorAlias.name,
      investigatorEmail: investigatorAlias.email,
    })
    .from(investigations)
    .leftJoin(investigatorAlias, eq(investigations.investigatorId, investigatorAlias.id))
    .where(eq(investigations.incidentId, id))
    .limit(1)
  )

  const incidentProp: Incident = {
    id: incident.id,
    reference_no: incident.referenceNo,
    incident_type: incident.incidentType,
    description: incident.description,
    status: incident.status,
    severity: incident.severity,
    injury_involved: incident.injuryInvolved,
    asset_involved: incident.assetInvolved,
    medical_status: incident.medicalStatus,
    lost_days: incident.lostDays,
    reported_at: incident.reportedAt.toISOString(),
    closed_at: incident.closedAt?.toISOString() ?? null,
    sites: incident.siteId ? { id: incident.siteId, name: incident.siteName! } : null,
    zones: incident.zoneId ? { id: incident.zoneId, name: incident.zoneName! } : null,
    trucks: incident.truckId ? { id: incident.truckId, truck_no: incident.truckNo!, carrier: incident.truckCarrier ?? null } : null,
    reporter: incident.reporterId ? { id: incident.reporterId, name: incident.reporterName!, email: incident.reporterEmail! } : null,
    evidence_files: evidenceRows.map(e => ({
      id: e.id,
      stage: e.stage,
      file_url: e.fileUrl,
      file_type: e.fileType,
      uploaded_at: e.uploadedAt.toISOString(),
    })),
  }

  const investigationProp = inv ? {
    id: inv.id,
    method: inv.method,
    five_why_steps: inv.fiveWhySteps as { why: string; answer: string }[] | null,
    fishbone_categories: inv.fishboneCategories as Record<string, string> | null,
    findings_text: inv.findingsText,
    root_cause_summary: inv.rootCauseSummary,
    alcohol_test_result: inv.alcoholTestResult,
    urine_test_result: inv.urineTestResult,
    witness_statement_refs: inv.witnessStatementRefs ?? [],
    completed_at: inv.completedAt?.toISOString() ?? null,
    investigator: inv.investigatorEmail
      ? { name: inv.investigatorName ?? null, email: inv.investigatorEmail }
      : null,
  } : null

  return (
    <main className="max-w-3xl mx-auto px-4 py-6">
      <Link href="/supervisor/incidents" className="text-sm text-blue-600 hover:underline mb-4 inline-block">
        ← Back to inbox
      </Link>
      <IncidentDetail incident={incidentProp} />
      {investigationProp && (
        <InvestigationPanel investigation={investigationProp} />
      )}
    </main>
  )
}