import { apiRequest } from './client'

// ---- Capability / model status (GET /biometrics/status) ----
export type ModalityState = 'available' | 'demo_untrained' | 'unavailable'
export interface ModalityInfo {
  available: boolean
  trained?: boolean
  experimental?: boolean
  state: ModalityState
}
export interface BiometricStatus {
  device: string
  modalities: Record<string, ModalityInfo>
}
export function getBiometricStatus(): Promise<BiometricStatus> {
  return apiRequest<BiometricStatus>('/biometrics/status')
}

// ---- Demo samples (bundled face/fingerprint/voice, base64) ----
export interface DemoSamples {
  face_image?: string
  fingerprint_image?: string
  voice_audio?: string
}
export async function getDemoSamples(userId: string): Promise<DemoSamples> {
  const r = await apiRequest<{ samples?: DemoSamples }>('/demo/seed', { body: { user_id: userId } })
  return r.samples ?? {}
}

// ---- Enrolment ----
export interface UnifiedEnrollInput {
  userId: string
  faceImage?: string
  fingerprintImage?: string
  voiceAudio?: string
}
export interface UnifiedEnrollResult {
  success: boolean
  modalities?: string[]
  reason?: string | null
  token?: string
}
export function unifiedEnroll(i: UnifiedEnrollInput): Promise<UnifiedEnrollResult> {
  const body: Record<string, string> = { user_id: i.userId }
  if (i.faceImage) body.face_image = i.faceImage
  if (i.fingerprintImage) body.fingerprint_image = i.fingerprintImage
  if (i.voiceAudio) body.voice_audio = i.voiceAudio
  return apiRequest<UnifiedEnrollResult>('/unified/enroll', { body })
}

// ---- Verification ----
export interface UnifiedAuthResult {
  success: boolean
  similarity: number
  threshold: number
  confidence?: number
  modalities?: string[]
  per_modality?: Record<string, number>
  quality_weights?: Record<string, number>
  deepfake_score?: number | null
  is_deepfake?: boolean
  reason?: string | null
}
export function unifiedAuthenticate(i: UnifiedEnrollInput): Promise<UnifiedAuthResult> {
  const body: Record<string, string> = { user_id: i.userId }
  if (i.faceImage) body.face_image = i.faceImage
  if (i.fingerprintImage) body.fingerprint_image = i.fingerprintImage
  if (i.voiceAudio) body.voice_audio = i.voiceAudio
  return apiRequest<UnifiedAuthResult>('/unified/authenticate', { body })
}

export interface AuthResult {
  success: boolean
  similarity: number
  threshold: number
  face_liveness?: number
  fp_liveness?: number
  confidence?: number
  face_quality?: number
  fp_quality?: number
  deepfake_score?: number | null
  is_deepfake?: boolean
  reason?: string | null
}
export function authenticate(userId: string, faceImage: string, fingerprintImage: string): Promise<AuthResult> {
  return apiRequest<AuthResult>('/authenticate', {
    body: { user_id: userId, face_image: faceImage, fingerprint_image: fingerprintImage },
  })
}

export interface VerifyResult {
  fused_similarity: number
  face_similarity: number
  fingerprint_similarity: number
}
export function verify1to1(face1: string, fp1: string, face2: string, fp2: string): Promise<VerifyResult> {
  return apiRequest<VerifyResult>('/verify', { body: { face1, fp1, face2, fp2 } })
}

// ---- Voice (backend field is `audio`) ----
export function voiceEnroll(userId: string, audio: string): Promise<{ success: boolean }> {
  return apiRequest('/voice/enroll', { body: { user_id: userId, audio } })
}
export function voiceVerify(userId: string, audio: string): Promise<{ success: boolean; similarity: number; threshold: number }> {
  return apiRequest('/voice/verify', { body: { user_id: userId, audio } })
}

// ---- Liveness ----
export interface LivenessChallenge { session_id: string; challenges: string[] }
export function livenessChallenge(userId: string, n = 3): Promise<LivenessChallenge> {
  return apiRequest<LivenessChallenge>('/liveness/challenge', { body: { user_id: userId, n } })
}
export function livenessVerify(sessionId: string, completed: string[], faceImage?: string): Promise<{ success: boolean; reason?: string | null }> {
  const body: Record<string, unknown> = { session_id: sessionId, completed }
  if (faceImage) body.face_image = faceImage
  return apiRequest('/liveness/verify', { body })
}

// ---- Flash liveness (colour reflection) ----
export interface FlashChallenge { session_id: string; sequence: string[]; expires?: number }
export function flashChallenge(userId: string, n = 4): Promise<FlashChallenge> {
  return apiRequest<FlashChallenge>('/pad/challenge', { body: { user_id: userId, n } })
}
export function flashVerify(sessionId: string, baseline: number[], measurements: number[][]): Promise<{ success: boolean; score?: number; reason?: string | null }> {
  return apiRequest('/pad/verify', { body: { session_id: sessionId, baseline, measurements } })
}