// Response shapes returned by the API. Dates are ISO 8601 strings.
import type {
  actionKinds,
  actionStatuses,
  AreaKind,
  IncidentStatus,
  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 Site {
  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[]
  /** What the signed-in user may do on this incident. */
  can: { edit: boolean; manageInvestigation: boolean; manageActions: 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 }[]
}

export interface AnalyticsStats {
  periodDays: number
  total: number
  byType: { type: IncidentType; count: number }[]
  bySeverity: { severity: Severity; count: number }[]
  topRootCause: { category: RootCauseCategory; count: number; share: number } | null
  /** Share of completed actions finished on or before their due date. */
  onTimeActionRate: number | null
  monthlyCompletedActions: { month: string; onTime: number; late: number }[]
}