import {z} from 'zod'

export type RequestedAmount = {currency: unknown, amount: number, tip?: number | undefined};

export type CreatePaymentRequestV3 = {store_id: string, terminal_id: string, requested_amount: RequestedAmount, transaction_type: 'SALE' | 'REFUND', merchant_reference: string, epos_instance_id?: string | undefined, basket_transaction_id?: string | undefined, tab_id?: string | undefined, payment_type?: ('FULL' | 'SPLIT') | undefined, payment_method?: ('CARD' | 'CASH') | undefined};

export type CreateApiPoslinkV3PaymentRequestsArgs = {'Idempotency-Key': string, body: CreatePaymentRequestV3};

export type CreateApiPoslinkV3PaymentRequestsOptions = {baseUrl?: string | undefined, authorisation?: string | undefined, fetch?: typeof fetch | undefined};

export const requestedAmount = z.object({currency: z.string(), amount: z.number().int(), tip: z.number().int().optional()});

export const createPaymentResponseV3 = z.object({payment_request_id: z.string().optional(), created_at: z.string().optional(), terminal_id: z.string().optional(), merchant_reference: z.string().optional(), requested_amount: requestedAmount.optional(), status: z.literal("NEW").optional(), transaction_type: z.string().optional(), updated_at: z.string().optional(), epos_instance_id: z.string().optional(), store_id: z.string().optional(), tab_id: z.string().optional(), payment_type: z.enum(["FULL", "SPLIT"]).optional(), payment_method: z.enum(["CARD", "CASH"]).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 a payment request
 * 
 * POST /poslink/v3/payment-requests
 */
export const createApiPoslinkV3PaymentRequests = async (args: CreateApiPoslinkV3PaymentRequestsArgs, options?: CreateApiPoslinkV3PaymentRequestsOptions) => {
const {baseUrl = "https://api.teya.com", fetch: fetchFn = fetch, authorisation} = options ?? {}

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

if (args['Idempotency-Key'] != null) headers.set("Idempotency-Key", String(args['Idempotency-Key']))
if (authorisation !== undefined) headers.set('authorization', `Bearer ${authorisation}`)

const url = `${baseUrl.replace(/\/+$/, '')}/poslink/v3/payment-requests${query.size > 0 ? `?${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(createPaymentResponseV3, await res.json())
};