import {z} from 'zod'

export type Currency = string;

export type GetApiCustomersExternalCustomerIdAnalyticsGrossRevenueArgs = {external_customer_id: string, months?: number | undefined, currency?: Currency | undefined};

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

export const currency = z.string().min(3).max(3);

export const grossRevenue = z.object({month: z.string().min(7).max(7).optional(), amount: z.object({value: z.number().gte(0), currency_code: currency}).optional(), invoices_count: z.number().int().optional()});

export const grossRevenues = z.object({gross_revenues: z.array(grossRevenue).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
};

/**
 * Retrieve customer gross revenue analytics
 * 
 * GET /customers/{external_customer_id}/analytics/gross-revenue
 */
export const getApiCustomersExternalCustomerIdAnalyticsGrossRevenue = async (args: GetApiCustomersExternalCustomerIdAnalyticsGrossRevenueArgs, options?: GetApiCustomersExternalCustomerIdAnalyticsGrossRevenueOptions) => {
const {baseUrl = "https://api-m.sandbox.paypal.com", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.months != null) query.append("months", String(args.months))
if (args.currency != null) query.append("currency", String(args.currency))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/customers/${encodeURIComponent(String(args.external_customer_id))}/analytics/gross-revenue${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(grossRevenues, await res.json())
};