import {z} from 'zod'

export type DtoPurchaseField = {key: string, value: string};

export type DtoHomeAddress = {city: string, country: string, line1: string, line2: string, subdivision: string, zip: string};

export type DtoRecipient = {dateOfBirth?: string | undefined, email?: string | undefined, firstName: string, gender?: string | undefined, homeAddress: DtoHomeAddress, lastName: string, middleName?: string | undefined, mothersMaidenName?: string | undefined, nationality?: string | undefined, occupation?: string | undefined, phone?: string | undefined};

export type DtoSender = {dateOfBirth: string, email?: string | undefined, employerAddress?: string | undefined, employerName?: string | undefined, firstName: string, gender?: string | undefined, homeAddress: DtoHomeAddress, lastName: string, middleName?: string | undefined, mothersMaidenName?: string | undefined, nationality?: string | undefined, occupation?: string | undefined, phone: string, relationToRecipient?: string | undefined, sourceOfFunds?: string | undefined};

export type DtoValueType = 'ZEND' | 'PRICE' | 'COST';

export type DtoPurchaseValue = {type: DtoValueType, value: number};

export type DtoBillPayPurchaseInput = {fields: Array<DtoPurchaseField>, offerId: string, recipient: DtoRecipient, sender: DtoSender, transactionId: string, value?: DtoPurchaseValue | undefined};

export type CreateApiBillpayPurchasesArgs = {body: DtoBillPayPurchaseInput};

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

export const dtoTransactionStatus = z.enum(["ACCEPTED", "PENDING", "AUTHORIZED", "IN_PROGRESS", "DONE", "FAILED"]);

export const dtoBillPayPurchaseResponse = z.object({status: dtoTransactionStatus, transactionId: z.string()});

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 a BillPay purchase
 * 
 * POST /billpay/purchases
 */
export const createApiBillpayPurchases = async (args: CreateApiBillpayPurchasesArgs, options: CreateApiBillpayPurchasesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (ApiKey !== undefined) headers.set("Authorization", ApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/billpay/purchases${query.size > 0 ? `?${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(dtoBillPayPurchaseResponse, await res.json())
};