import {z} from 'zod'

export type CreateApiCertificationsOtpRequestArgs = {body: {name: string, phone: string, birth: string, gender_digit: string, carrier: 'SKT' | 'KT' | 'LGT', is_mvno?: boolean | undefined, company?: string | undefined, merchant_uid?: string | undefined, pg?: string | undefined, channel_key: string, verification_method?: ('SMS' | 'APP') | undefined, bypass?: string | undefined}};

export type CreateApiCertificationsOtpRequestOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const certificationOTPAnnotation = z.object({imp_uid: z.string()});

export const certificationOTPResponse = z.object({code: z.number().int().optional(), message: z.string().optional(), response: certificationOTPAnnotation.optional()});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * 본인인증 요청 API
 * 
 * POST /certifications/otp/request
 */
export const createApiCertificationsOtpRequest = async (args: CreateApiCertificationsOtpRequestArgs, options?: CreateApiCertificationsOtpRequestOptions) => {
const {baseUrl = "https://api.iamport.kr", fetch: fetchFn = fetch} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/x-www-form-urlencoded")
headers.set('accept', "application/json")

const url = `${baseUrl.replace(/\/+$/, '')}/certifications/otp/request${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: new URLSearchParams(Object.entries(args.body).flatMap(([key, value]) => (value == null ? [] : [[key, String(value)]])))})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(certificationOTPResponse, await res.json())
};