export const INCIDENT_TYPES = ['injury', 'near_miss', 'hazard', 'asset_damage', 'environmental', 'security', 'fire'] as const
export const MEDICAL_STATUSES = ['none', 'first_aid', 'medical_treatment', 'lti'] as const

export type IncidentType = typeof INCIDENT_TYPES[number]
export type MedicalStatus = typeof MEDICAL_STATUSES[number]

export interface IncidentInput {
  zone_token: string
  incident_type: IncidentType
  description: string
  injury_involved: boolean
  medical_status?: MedicalStatus
  asset_involved: boolean
}

export function validateIncidentInput(input: IncidentInput): { ok: boolean; errors: string[] } {
  const errors: string[] = []

  if (!input.zone_token?.trim()) errors.push('zone_token is required')
  if (input.description.trim().length < 10) errors.push('description must be at least 10 characters')
  if (!INCIDENT_TYPES.includes(input.incident_type)) errors.push('incident_type is invalid')
  if (input.injury_involved && !input.medical_status) errors.push('medical_status is required when injury is involved')
  if (input.medical_status && !MEDICAL_STATUSES.includes(input.medical_status)) errors.push('medical_status is invalid')

  return { ok: errors.length === 0, errors }
}