// Response shapes returned by the API. Dates are ISO 8601 strings.
import type { SummaryTotals } from './osha.ts'
import type {
  actionKinds,
  actionStatuses,
  AreaKind,
  employmentTypes,
  IncidentStatus,
  OshaCaseType,
  OshaOutcome,
  OshaSpecialCase,
  IncidentType,
  rcaMethods,
  Role,
  rootCauseCategories,
  Severity,
} from './enums.ts'

export type ActionKind = (typeof actionKinds)[number]
export type ActionStatus = (typeof actionStatuses)[number]
export type RcaMethod = (typeof rcaMethods)[number]
export type RootCauseCategory = (typeof rootCauseCategories)[number]

export interface UserRef {
  id: string
  name: string
}

export interface User {
  id: string
  email: string
  name: string
  role: Role
  active: boolean
  lastLoginAt: string | null
  createdAt: string
}

export interface Organization {
  id: string
  name: string
}

export interface Area {
  id: string
  siteId: string
  parentId: string | null
  name: string
  kind: AreaKind
  archivedAt: string | null
}

export interface Establishment {
  streetAddress: string | null
  city: string | null
  state: string | null
  zip: string | null
  naicsCode: string | null
  industryDescription: string | null
  ein: string | null
  establishmentType: number
}

export interface Site extends Partial<Establishment> {
  id: string
  name: string
  address: string | null
  timezone: string
  archivedAt: string | null
  areas: Area[]
}

export interface Incident {
  id: string
  number: number
  reference: string
  title: string
  type: IncidentType
  severity: Severity
  status: IncidentStatus
  occurredAt: string
  reportedAt: string
  updatedAt: string
  closedAt: string | null
  site: { id: string; name: string }
  area: { id: string; name: string } | null
  locationDetail: string | null
  description: string | null
  immediateAction: string | null
  anonymous: boolean
  reporter: UserRef | null
  /** Name given by someone reporting without an account. */
  reporterName: string | null
  /** How the report arrived; `kiosk` covers kiosk tablets and QR codes on reporting links. */
  channel: 'web' | 'kiosk'
  kiosk: { id: string; name: string } | null
}

export interface Kiosk {
  id: string
  name: string
  token: string
  site: { id: string; name: string } | null
  lastUsedAt: string | null
  revokedAt: string | null
  createdAt: string
}

/** What a reporting link may see: just enough to fill in the report form. */
export interface KioskConfig {
  organization: { name: string }
  kiosk: { name: string }
  sites: Site[]
}

export interface Investigation {
  id: string
  lead: UserRef | null
  method: RcaMethod
  summary: string | null
  startedAt: string
  completedAt: string | null
}

export interface RootCause {
  id: string
  category: RootCauseCategory
  description: string
  whys: string[]
}

export interface CorrectiveAction {
  id: string
  incident: { number: number; reference: string; title: string }
  rootCauseId: string | null
  kind: ActionKind
  title: string
  description: string | null
  assignee: UserRef | null
  dueDate: string | null
  status: ActionStatus
  overdue: boolean
  completedAt: string | null
  verifiedBy: UserRef | null
  verifiedAt: string | null
  createdAt: string
}

export interface Attachment {
  id: string
  fileName: string
  contentType: string
  sizeBytes: number
  uploadedBy: UserRef | null
  createdAt: string
  url: string
}

export interface TransitionOption {
  to: IncidentStatus
  label: string
  /** Why the transition can't happen yet; absent when it is allowed. */
  blockedReason?: string
}

export interface IncidentDetail extends Incident {
  investigation: Investigation | null
  rootCauses: RootCause[]
  actions: CorrectiveAction[]
  attachments: Attachment[]
  transitions: TransitionOption[]
  /** Number of injured or ill people recorded; details are only for safety managers. */
  injuredCount: number
  /** What the signed-in user may do on this incident. */
  can: { edit: boolean; manageInvestigation: boolean; manageActions: boolean; manageOsha: boolean }
}

export interface Comment {
  id: string
  author: UserRef | null
  body: string
  createdAt: string
}

export interface TimelineEntry {
  id: number
  at: string
  actor: UserRef | null
  action: string
  changes: Record<string, unknown> | null
}

export interface Paginated<T> {
  items: T[]
  page: number
  pageSize: number
  total: number
}

export interface OverviewStats {
  openIncidents: number
  reportedLast7Days: number
  actionsDueThisWeek: number
  overdueActions: number
  /** Average days from report to close for incidents closed in the last 90 days. */
  averageCloseDays: number | null
  byStatus: Record<IncidentStatus, number>
  actionProgress: { completed: number; total: number }
  /** Incidents per week for the last 12 weeks, oldest first. */
  weeklyTrend: { weekStart: string; count: number }[]
  bySite: { siteId: string; name: string; count: number }[]
}

/** A number for the selected period and the same-length period before it. */
export interface Kpi {
  value: number | null
  previous: number | null
}

/** Incident types grouped for trend charts. */
export type TypeGroup = 'hazards' | 'injuries' | 'damage'

export interface AnalyticsStats {
  from: string
  to: string
  previousFrom: string
  bucket: 'week' | 'month'
  kpis: {
    reports: Kpi
    /** Leading: hazards and near misses reported. */
    leadingReports: Kpi
    injuries: Kpi
    /** Leading: hazards and near misses per injury or illness. */
    nearMissRatio: Kpi
    /** Leading: share of reports moved out of "reported" within 24 hours. */
    triagedWithin24h: Kpi
    /** Leading: share of actions completed by their due date. */
    actionsOnTime: Kpi
    averageDaysToClose: Kpi
    /** Lagging: OSHA-recordable cases (supervisors and above). */
    recordables: Kpi | null
    overdueActions: number
  }
  trend: ({ start: string } & Record<TypeGroup, number>)[]
  byLocation: { id: string | null; name: string; count: number }[]
  byRootCause: { category: RootCauseCategory; count: number }[]
  /** heatmap[weekday][hour], weekday 0 = Monday, in the server's time zone. */
  heatmap: number[][]
  actionsByMonth: { month: string; onTime: number; late: number }[]
  /** Rolling 12-month OSHA rates at each month end; null for reporters. */
  rates: { month: string; trir: number | null; dart: number | null }[] | null
  yearly: { year: number; recordables: number; dartCases: number; hours: number; trir: number | null; dart: number | null }[] | null
}

export interface SavedView {
  id: string
  page: 'analytics' | 'incidents'
  name: string
  filters: Record<string, string>
  shared: boolean
  mine: boolean
}

// ---- OSHA recordkeeping ----

export interface OshaCase {
  id: string
  incident: { id: string; number: number; reference: string; title: string; occurredAt: string }
  caseNumber: string
  name: string
  jobTitle: string | null
  employmentType: (typeof employmentTypes)[number]
  bodyPart: string | null
  natureOfInjury: string | null
  caseType: OshaCaseType
  workRelated: boolean | null
  newCase: boolean | null
  died: boolean
  dateOfDeath: string | null
  daysAwayFromWork: boolean
  daysAway: number
  restrictedOrTransfer: boolean
  daysRestricted: number
  medicalTreatment: boolean
  lossOfConsciousness: boolean
  significantDiagnosis: boolean
  specialCase: OshaSpecialCase
  privacyCase: boolean
  recordable: boolean
  outcome: OshaOutcome | null
  inpatientHospitalization: boolean
  amputation: boolean
  lossOfEye: boolean
  reportedToOshaAt: string | null
  /** Set when 1904.39 requires a direct report to OSHA. */
  severeReport: { withinHours: 8 | 24; reasons: string[]; dueBy: string } | null
  employeeAddress: string | null
  dateOfBirth: string | null
  dateOfHire: string | null
  sex: 'M' | 'F' | null
  physicianName: string | null
  treatmentFacility: string | null
  treatedInEmergencyRoom: boolean
  timeStartedWork: string | null
  activityBefore: string | null
  whatHappened: string | null
  objectSubstance: string | null
  /** Form 301 / ITA fields still empty for a recordable case. */
  missingFields: string[]
  updatedAt: string
}

/** One line of the Form 300 Log. */
export interface OshaLogRow {
  caseId: string
  caseNumber: string
  incidentNumber: number
  /** "Privacy case" for privacy concern cases. */
  employeeName: string
  jobTitle: string
  dateOfInjury: string
  location: string
  description: string
  outcome: OshaOutcome
  daysAway: number
  daysRestricted: number
  caseType: OshaCaseType
  missingFields: string[]
}

export interface OshaYear {
  site: { id: string; name: string } & Establishment
  companyName: string
  year: number
  rows: OshaLogRow[]
  totals: SummaryTotals
  months: { month: number; hours: number | null; averageEmployees: number | null }[]
  totalHoursWorked: number
  annualAverageEmployees: number
  maxEmployees: number
  rates: { trir: number | null; dart: number | null; ltir: number | null }
  checks: { errors: string[]; warnings: string[] }
  missingEstablishmentFields: string[]
}

export interface Form301 {
  case: OshaCase
  establishment: { name: string; companyName: string } & Establishment
  incident: { reference: string; occurredAt: string; title: string; description: string | null; site: string; area: string | null; locationDetail: string | null }
}