// Loads demo data into an empty database: `npm run db:seed`. Not for production use.
import { hashPassword } from '../auth/password.ts'
import { loadConfig } from '../config.ts'
import { openDatabase } from './client.ts'
import { auditLog, areas, incidentCounters, incidents, organizations, sites, users } from './schema.ts'

const DEMO_PASSWORD = 'safetylog-demo'

const config = loadConfig()
const { db, close } = await openDatabase(config.databaseUrl)

try {
  if ((await db.select({ id: users.id }).from(users).limit(1)).length > 0) {
    console.error('Database already has users; seeding is only for empty databases.')
    process.exitCode = 1
  } else {
    await db.transaction(async (tx) => {
      const [org] = await tx.insert(organizations).values({ name: 'Northstar Co.' }).returning()
      const passwordHash = await hashPassword(DEMO_PASSWORD)
      const people = await tx
        .insert(users)
        .values([
          { name: 'Jordan Lee', email: 'admin@example.com', role: 'admin' as const },
          { name: 'Priya Shah', email: 'manager@example.com', role: 'safety_manager' as const },
          { name: 'Sam Rivera', email: 'supervisor@example.com', role: 'supervisor' as const },
          { name: 'Maya Chen', email: 'reporter@example.com', role: 'reporter' as const },
        ].map((u) => ({ ...u, organizationId: org.id, passwordHash })))
        .returning()
      const person = (email: string) => people.find((p) => p.email === email)!.id

      const layout: Record<string, string[]> = {
        'North Campus': ['Building A', 'Warehouse 04', 'Lab 2'],
        'South Campus': ['Fabrication 02', 'Yard', 'Office block'],
        'West Campus': ['Warehouse 01', 'Loading dock'],
      }
      const areaIds: Record<string, { siteId: string; areaId: string }> = {}
      for (const [siteName, buildings] of Object.entries(layout)) {
        const [site] = await tx.insert(sites).values({ organizationId: org.id, name: siteName }).returning()
        for (const name of buildings) {
          const [area] = await tx.insert(areas).values({ siteId: site.id, name, kind: 'building' }).returning()
          areaIds[name] = { siteId: site.id, areaId: area.id }
        }
      }

      const daysAgo = (days: number) => new Date(Date.now() - days * 86_400_000)
      const demo = [
        { title: 'Damaged guardrail on mezzanine', type: 'property_damage', severity: 'low', status: 'closed', building: 'Warehouse 01', locationDetail: 'Mezzanine east', reporter: 'manager@example.com', days: 9 },
        { title: 'Hand laceration during material handling', type: 'injury', severity: 'high', status: 'investigation', building: 'Fabrication 02', locationDetail: 'Line 3', reporter: 'supervisor@example.com', days: 7 },
        { title: 'Wet floor near employee entrance', type: 'hazard', severity: 'medium', status: 'actions', building: 'Building A', locationDetail: 'Ground floor lobby', reporter: 'reporter@example.com', days: 6 },
        { title: 'Forklift reversed into pallet stack', type: 'near_miss', severity: 'high', status: 'triage', building: 'Warehouse 04', locationDetail: 'Loading bay C', reporter: 'admin@example.com', days: 5 },
      ] as const
      const created = await tx
        .insert(incidents)
        .values(
          demo.map((item, index) => ({
          organizationId: org.id,
          number: index + 1,
          title: item.title,
          type: item.type,
          severity: item.severity,
          status: item.status,
          occurredAt: daysAgo(item.days),
          createdAt: new Date(daysAgo(item.days).getTime() + 2 * 3_600_000),
          ...areaIds[item.building],
          locationDetail: item.locationDetail,
          reporterId: person(item.reporter),
          closedAt: item.status === 'closed' ? daysAgo(item.days - 3) : null,
          })),
        )
        .returning()
      await tx.insert(auditLog).values(
        created.map((incident) => ({
          organizationId: org.id,
          actorId: incident.reporterId,
          entityType: 'incident',
          entityId: incident.id,
          action: 'create',
          changes: { number: incident.number, title: incident.title },
          createdAt: incident.createdAt,
        })),
      )
      await tx.insert(incidentCounters).values({ organizationId: org.id, lastNumber: demo.length })
    })
    console.log(`Seeded demo data. Sign in as admin@example.com, manager@example.com, supervisor@example.com or reporter@example.com with password "${DEMO_PASSWORD}".`)
  }
} finally {
  await close()
}