import { asc, eq } from 'drizzle-orm'
import { roles, userRoles, users } from '../../db/schema'

export default defineEventHandler(async (event) => {
  await requirePermission(event, 'admin.access')
  const db = useDb()

  const allUsers = await db
    .select({ id: users.id, name: users.name, email: users.email, createdAt: users.createdAt })
    .from(users)
    .orderBy(asc(users.name))

  const roleRows = await db
    .select({ userId: userRoles.userId, roleId: roles.id, name: roles.name })
    .from(userRoles)
    .innerJoin(roles, eq(userRoles.roleId, roles.id))

  const byUser = new Map<number, { id: number, name: string }[]>()
  for (const row of roleRows) {
    const list = byUser.get(row.userId) ?? []
    list.push({ id: row.roleId, name: row.name })
    byUser.set(row.userId, list)
  }

  return allUsers.map(u => ({ ...u, roles: byUser.get(u.id) ?? [] }))
})