import {z} from 'zod'

export type Amount = {amount: string, currency: string};

export type Address = {phoneNumber?: string | undefined, countryCode?: unknown | undefined, name?: string | undefined, postcode?: string | undefined, suburb?: string | undefined, line1?: string | undefined};

export type Items = Array<{gtin?: string | undefined, quantity: number, price: Amount, name: string, category: string, subcategory?: Array<string> | undefined, sku: string, brand?: string | undefined, pageUrl?: string | undefined, imageUrl?: string | undefined}>;

export type MerchantReference = string;

export type Extensions = {industry?: ({travel?: ({startDate?: string | undefined, endDate?: string | undefined}) | undefined}) | undefined, type?: ({link?: ({notification: {phoneCountryCode?: string | undefined, phoneNumber?: string | undefined, preferredLanguage?: ('' | 'english' | 'italiano' | 'francais' | 'deutsch' | 'espanol' | 'dutch' | 'suomi' | 'portuguese') | undefined, emailAddress?: string | undefined, channels: Array<'email' | 'sms'>}}) | undefined}) | undefined};

export type CreateApiV2OrdersArgs = {'Idempotency-Key'?: string | undefined, body: {totalAmount: Amount, consumer: {phoneNumber: string, givenNames: string, surname: string, email: string}, billing?: Address | undefined, shipping: Address, items: Items, discounts?: (Array<{amount?: Amount | undefined, displayName?: string | undefined}>) | undefined, merchant: {redirectCancelUrl: string, redirectConfirmUrl: string}, merchantReference?: MerchantReference | undefined, shippingAmount?: Amount | undefined, taxAmount?: Amount | undefined, type?: ('' | 'online' | 'offline' | 'link') | undefined, product?: ('' | 'pay-in-3' | 'pay-in-4' | 'later' | 'pay-now-standalone') | undefined, frequency?: ({number?: number | undefined, frequencyType?: string | undefined}) | undefined, orderExpiryMilliseconds?: number | undefined, extensions?: Extensions | undefined}};

export type CreateApiV2OrdersOptions = {baseUrl?: string | undefined, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiV2OrdersResponse = z.object({token: z.string(), expires: z.string().optional(), checkoutUrl: z.string().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 order
 * 
 * POST /v2/orders
 */
export const createApiV2Orders = async (args: CreateApiV2OrdersArgs, options?: CreateApiV2OrdersOptions) => {
const {baseUrl = "https://integration.api.scalapay.com", fetch: fetchFn = fetch, ApiKeyAuth} = 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 (ApiKeyAuth !== undefined) headers.set("Authorization", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/orders${query.size > 0 ? `?${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(createApiV2OrdersResponse, await res.json())
};