import {z} from 'zod'

export type TransactionAmount = {total: number, currency: string};

export type PaymentMethod = {paymentType: 'ALTERNATIVE_PAYMENT_METHOD', provider: string, providerId: string, transactionId?: string | undefined, customerId?: string | undefined};

export type TransactionDetails = {transactionId: string, transactionTimestamp: string, origin: 'ECOMMERCE', adviceType: 'SALE' | 'REFUND' | 'VOID'};

export type Address = {street?: string | undefined, houseNumberOrName?: string | undefined, city: string, stateOrProvince?: string | undefined, postalCode: string, country: string};

export type MerchantDetails = {merchantName: string, merchantId: string, mcc: string, alliance: string, merchantAddress: Address};

export type PaymentAdviceRequest = {requestType: 'PaymentAdviceRequest', transactionAmount: TransactionAmount, paymentMethod: PaymentMethod, transactionDetails: TransactionDetails, merchantDetails: MerchantDetails};

export type CreateApiPaymentsAdviceArgs = {'Client-Request-Id': string, Timestamp: number, 'Message-Signature': string, body: PaymentAdviceRequest};

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

export const transactionAmount = z.object({total: z.number().gte(0).lte(999999999), currency: z.string()});

export const paymentMethod = z.object({paymentType: z.literal("ALTERNATIVE_PAYMENT_METHOD"), provider: z.string().min(1).max(30), providerId: z.string().min(1).max(3), transactionId: z.string().optional(), customerId: z.string().optional()});

export const transactionDetails = z.object({transactionId: z.string().min(1).max(40), transactionTimestamp: z.string(), origin: z.literal("ECOMMERCE"), adviceType: z.enum(["SALE", "REFUND", "VOID"])});

export const address = z.object({street: z.string().max(64).optional(), houseNumberOrName: z.string().max(64).optional(), city: z.string().min(1).max(64), stateOrProvince: z.string().min(2).max(3).optional(), postalCode: z.string().min(1).max(10), country: z.string().min(2).max(3)});

export const merchantDetails = z.object({merchantName: z.string().min(1).max(64), merchantId: z.string().min(1).max(16), mcc: z.string().min(1).max(4), alliance: z.string().min(1).max(16), merchantAddress: address});

export const processorDetails = z.object({transactionResult: z.enum(["APPROVED", "DECLINED", "FAILED"]).optional(), approvalCode: z.string().max(2).optional()});

export const paymentAdviceResponse = z.object({responseType: z.literal("PaymentAdviceResponse"), transactionAmount: transactionAmount, paymentMethod: paymentMethod, transactionDetails: transactionDetails, merchantDetails: merchantDetails, processorDetails: processorDetails});

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
};

/**
 * Submit a Payment Advice Notification Transaction
 * 
 * POST /payments/advice
 */
export const createApiPaymentsAdvice = async (args: CreateApiPaymentsAdviceArgs, options?: CreateApiPaymentsAdviceOptions) => {
const {baseUrl = "https://prod.emea.api.fiservapps.com/ipp/omnipay/acquirerprofile/v1.0", fetch: fetchFn = fetch} = options ?? {}

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

if (args['Client-Request-Id'] != null) headers.set("Client-Request-Id", String(args['Client-Request-Id']))
if (args.Timestamp != null) headers.set("Timestamp", String(args.Timestamp))
if (args['Message-Signature'] != null) headers.set("Message-Signature", String(args['Message-Signature']))

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