import {z} from 'zod'

export type GetApiCountriesArgs = {include_fake_providers?: boolean | undefined};

export type GetApiCountriesOptions = {baseUrl?: string | undefined, appId?: string | undefined, secret?: string | undefined, fetch?: typeof fetch | undefined};

export const country = z.object({name: z.string(), code: z.string(), refresh_start_time: z.union([z.literal(0), z.literal(1), z.literal(2), z.literal(3), z.literal(4), z.literal(5), z.literal(6), z.literal(7), z.literal(8), z.literal(9), z.literal(10), z.literal(11), z.literal(12), z.literal(13), z.literal(14), z.literal(15), z.literal(16), z.literal(17), z.literal(18), z.literal(19), z.literal(20), z.literal(21), z.literal(22), z.literal(23)])});

export const countriesResponse = z.object({data: z.array(country).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
};

/**
 * List of countries
 * 
 * GET /countries
 */
export const getApiCountries = async (args: GetApiCountriesArgs, options?: GetApiCountriesOptions) => {
const {baseUrl = "https://www.saltedge.com/api/v5", fetch: fetchFn = fetch, appId, secret} = options ?? {}

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

if (args.include_fake_providers != null) query.append("include_fake_providers", String(args.include_fake_providers))
if (appId !== undefined) headers.set("App-id", appId)
if (secret !== undefined) headers.set("Secret", secret)

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