import {z} from 'zod'

export type GetApiRestRecodeSitegroupAlgorithmArgs = {algorithm: string, site: string, hist: string, behavior?: string | undefined};

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

export const siteRecode = z.object({site: z.string().optional(), hist: z.string().optional(), behavior: z.string().optional(), site_group: 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
};

/**
 * Return the site group for the site/histology/behavior combination based on a specified algorithm
 * 
 * GET /rest/recode/sitegroup/{algorithm}
 */
export const getApiRestRecodeSitegroupAlgorithm = async (args: GetApiRestRecodeSitegroupAlgorithmArgs, options?: GetApiRestRecodeSitegroupAlgorithmOptions) => {
const {baseUrl = "https://api.seer.cancer.gov", fetch: fetchFn = fetch, apiKeyScheme} = options ?? {}

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

if (args.site != null) query.append("site", String(args.site))
if (args.hist != null) query.append("hist", String(args.hist))
if (args.behavior != null) query.append("behavior", String(args.behavior))
if (apiKeyScheme !== undefined) headers.set("X-SEERAPI-Key", apiKeyScheme)

const url = `${baseUrl.replace(/\/+$/, '')}/rest/recode/sitegroup/${encodeURIComponent(String(args.algorithm))}${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(siteRecode, await res.json())
};