import {z} from 'zod'

export type StorefrontCheckoutVariantItem = {type: 'variant', variant_id: number, quantity: number};

export type StorefrontCheckoutBundlePriceOptionItem = {type: 'bundle_price_option', bundle_price_option_id: number, quantity: number};

export type StorefrontCheckoutItem = StorefrontCheckoutVariantItem | StorefrontCheckoutBundlePriceOptionItem;

export type StorefrontCheckoutDestination = {location_id: number | string, postal_code: string};

export type StorefrontSelectedShippingOption = {courier_service_id?: (number | string) | undefined, warehouse_unique_id?: string | undefined, courier_aggregator_code?: (string | null) | undefined} | {[key: string]: unknown};

export type StorefrontMoneyValue = string | null | number;

export type StorefrontCheckoutSummaryRequest = {items?: Array<StorefrontCheckoutItem> | undefined, destination?: StorefrontCheckoutDestination | undefined, payment_method?: string | undefined, courier_service_id?: (number | string) | undefined, warehouse_unique_id?: string | undefined, courier_aggregator_code?: (string | null) | undefined, shipping_option?: StorefrontSelectedShippingOption | undefined, selected_shipping_option?: StorefrontSelectedShippingOption | undefined, shipping_cost?: StorefrontMoneyValue | undefined, discount_code_code?: (string | null) | undefined} | {[key: string]: unknown};

export type CreateApiV3StoresStoreIdPublicCheckoutSummaryArgs = {body: StorefrontCheckoutSummaryRequest};

export type CreateApiV3StoresStoreIdPublicCheckoutSummaryOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const storefrontMoneyValue = z.union([z.string().nullable(), z.number()]);

export const storefrontCheckoutSummaryResponse = z.object({product_price: storefrontMoneyValue, shipping_cost: storefrontMoneyValue, other_income: storefrontMoneyValue, other_income_name: z.string().nullable(), service_fee: storefrontMoneyValue, gross_revenue: storefrontMoneyValue});

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
};

/**
 * Compute guest checkout summary
 * 
 * POST /v3/stores/{store_id}/public/checkout/summary
 */
export const createApiV3StoresStoreIdPublicCheckoutSummary = async (args: CreateApiV3StoresStoreIdPublicCheckoutSummaryArgs, options?: CreateApiV3StoresStoreIdPublicCheckoutSummaryOptions) => {
const {baseUrl = "https://api.scalev.com", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v3/stores/${encodeURIComponent(String(args.store_id))}/public/checkout/summary${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(storefrontCheckoutSummaryResponse, await res.json())
};