import { unwrapApiResponse, unwrapNullableApiResponse } from '@/utils/api-response'
import { request } from '@/utils/request'

import type {
  ApiResponseOf,
  PadBindingRequest,
  PadSessionUploadInput,
  SendSmsDeliveryRequest,
  SignDeliveryResponseDto,
  SignatureUploadResponse,
  SigningTokenUploadInput,
  TokenConsumeRequest,
  TokenConsumeResponse,
} from './types'

function createIdempotencyKey() {
  if (typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function') {
    return `clinical-web-${crypto.randomUUID()}`
  }

  return `clinical-web-${Date.now()}-${Math.random().toString(36).slice(2)}`
}

function idempotencyHeaders(value?: string) {
  return { 'Idempotency-Key': value || createIdempotencyKey() }
}

export function sendSigningSms(
  taskId: string,
  payload: SendSmsDeliveryRequest,
  idempotencyKey?: string,
): Promise<SignDeliveryResponseDto | null> {
  return request
    .post<ApiResponseOf<SignDeliveryResponseDto | null>>(
      `/v1/sign-deliveries/${encodeURIComponent(taskId)}/sms/send`,
      payload,
      { headers: idempotencyHeaders(idempotencyKey) },
    )
    .then(unwrapNullableApiResponse)
}

export function resendSigningSms(
  taskId: string,
  idempotencyKey?: string,
): Promise<SignDeliveryResponseDto | null> {
  return request
    .post<ApiResponseOf<SignDeliveryResponseDto | null>>(
      `/v1/sign-deliveries/${encodeURIComponent(taskId)}/sms/resend`,
      undefined,
      { headers: idempotencyHeaders(idempotencyKey) },
    )
    .then(unwrapNullableApiResponse)
}

export function createPadSigningSession(
  taskId: string,
  payload: PadBindingRequest = {},
  idempotencyKey?: string,
): Promise<SignDeliveryResponseDto> {
  return request
    .post<ApiResponseOf<SignDeliveryResponseDto>>(
      `/v1/sign-deliveries/${encodeURIComponent(taskId)}/pad/sessions`,
      payload,
      { headers: idempotencyHeaders(idempotencyKey) },
    )
    .then(unwrapApiResponse)
}

export function consumeSigningToken(
  payload: TokenConsumeRequest,
  idempotencyKey?: string,
): Promise<TokenConsumeResponse> {
  return request
    .post<ApiResponseOf<TokenConsumeResponse>>('/v1/sign-deliveries/token/consume', payload, {
      headers: idempotencyHeaders(idempotencyKey),
    })
    .then(unwrapApiResponse)
}

function createSignatureFormData(file: File | Blob, metadata: string) {
  const formData = new FormData()
  const fileName =
    typeof File !== 'undefined' && file instanceof File && file.name ? file.name : 'signature.png'
  formData.append('file', file, fileName)
  formData.append('metadata', metadata)
  return formData
}

export function uploadSigningSignature(
  payload: SigningTokenUploadInput,
): Promise<SignatureUploadResponse> {
  const formData = createSignatureFormData(payload.file, payload.metadata)

  return request
    .post<ApiResponseOf<SignatureUploadResponse>>(
      `/v1/sign-deliveries/${encodeURIComponent(payload.taskId)}/signature`,
      formData,
      {
        params: {
          deliveryId: payload.deliveryId,
          uploadToken: payload.uploadToken,
        },
        headers: idempotencyHeaders(payload.idempotencyKey),
      },
    )
    .then(unwrapApiResponse)
}

/**
 * PAD 专用兼容路径。服务端要求同时提交 PAD 元数据和真实 PNG，旧的 JSON-only 提交会返回 409。
 * 具体的 challenge、文件摘要和 storageKey 由设备适配层生成，页面不应伪造这些值。
 */
export function uploadPadSigningSignature(
  payload: PadSessionUploadInput,
): Promise<SignatureUploadResponse> {
  if (!payload.pad) {
    return Promise.reject(new Error('PAD 上传缺少会话元数据'))
  }

  const formData = createSignatureFormData(payload.file, payload.metadata)
  formData.append('challenge', payload.pad.challenge)
  formData.append('contentType', payload.pad.contentType)
  formData.append('sizeBytes', String(payload.pad.sizeBytes ?? payload.file.size))
  formData.append('sha256', payload.pad.sha256)
  formData.append('storageKey', payload.pad.storageKey)

  return request
    .post<ApiResponseOf<SignatureUploadResponse>>(
      `/v1/sign-deliveries/${encodeURIComponent(payload.taskId)}/pad/sessions/${encodeURIComponent(payload.deliveryId)}/upload`,
      formData,
      {
        params: { uploadToken: payload.uploadToken },
        headers: idempotencyHeaders(payload.idempotencyKey),
      },
    )
    .then(unwrapApiResponse)
}

export function uploadSigningSignatureByProof(
  payload: SigningTokenUploadInput,
): Promise<SignatureUploadResponse> {
  const formData = createSignatureFormData(payload.file, payload.metadata)

  return request
    .post<ApiResponseOf<SignatureUploadResponse>>('/v1/sign-deliveries/token/signature', formData, {
      params: {
        taskId: payload.taskId,
        deliveryId: payload.deliveryId,
        uploadToken: payload.uploadToken,
      },
      headers: idempotencyHeaders(payload.idempotencyKey),
    })
    .then(unwrapApiResponse)
}