import {z} from 'zod'

export type GetApiSubnationalCountryCodeArgs = {country_code: string, level?: (string | null) | undefined, admin_level?: (number | null) | undefined, income_class?: (string | null) | undefined, year_from?: (number | null) | undefined, year_to?: (number | null) | undefined, include_forecasts?: boolean | undefined, city_name?: (string | null) | undefined, currencies?: (string | null) | undefined};

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

export const getApiSubnationalCountryCodeResponse = z.unknown();

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
};

/**
 * Get Subnational
 * 
 * GET /subnational/{country_code}
 */
export const getApiSubnationalCountryCode = async (args: GetApiSubnationalCountryCodeArgs, options: GetApiSubnationalCountryCodeOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args.level != null) query.append("level", String(args.level))
if (args.admin_level != null) query.append("admin_level", String(args.admin_level))
if (args.income_class != null) query.append("income_class", String(args.income_class))
if (args.year_from != null) query.append("year_from", String(args.year_from))
if (args.year_to != null) query.append("year_to", String(args.year_to))
if (args.include_forecasts != null) query.append("include_forecasts", String(args.include_forecasts))
if (args.city_name != null) query.append("city_name", String(args.city_name))
if (args.currencies != null) query.append("currencies", String(args.currencies))
if (APIKeyHeader !== undefined) headers.set("X-API-Key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/subnational/${encodeURIComponent(String(args.country_code))}${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(getApiSubnationalCountryCodeResponse, await res.json())
};