import {z} from 'zod'

export type KYCLinkType = 'individual' | 'business';

export type EndorsementName = 'base' | 'cards' | 'cop' | 'faster_payments' | 'pix' | 'sepa' | 'spei';

export type KYCLinkRequest = {email: string, type: KYCLinkType, full_name?: string | undefined, endorsements?: Array<EndorsementName> | undefined, redirect_uri?: string | undefined, email_challenge_id: string, email_challenge_code: string};

export type CreateApiOffRampVerificationArgs = {'Authorization-Signature': string, body: KYCLinkRequest};

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

export const kYCLinkType = z.enum(["individual", "business"]);

export const kYCStatus = z.enum(["not_started", "incomplete", "awaiting_questionnaire", "awaiting_ubo", "under_review", "approved", "rejected", "paused", "offboarded"]);

export const kYCRejectionReason = z.object({developer_reason: z.string(), reason: z.string(), created_at: z.string()});

export const tOSStatus = z.enum(["pending", "approved"]);

export const kYCLinkResponse = z.object({id: z.string(), type: kYCLinkType, customer_id: z.string().nullable().optional(), full_name: z.string().nullable().optional(), email: z.string(), kyc_link: z.string(), kyc_status: kYCStatus, rejection_reasons: z.array(kYCRejectionReason).optional(), tos_link: z.string(), tos_status: tOSStatus, created_at: z.string().nullable().optional(), requirement_url: z.string().nullable().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
};

/**
 * Create Off-ramp Verification
 * 
 * POST /off-ramp/verification
 */
export const createApiOffRampVerification = async (args: CreateApiOffRampVerificationArgs, options?: CreateApiOffRampVerificationOptions) => {
const {baseUrl = "https://api.coinvoyage.io/v3", fetch: fetchFn = fetch, Authorization} = options ?? {}

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

if (args['Authorization-Signature'] != null) headers.set("Authorization-Signature", String(args['Authorization-Signature']))
if (Authorization !== undefined) headers.set("Authorization", Authorization)

const url = `${baseUrl.replace(/\/+$/, '')}/off-ramp/verification${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

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