import {z} from 'zod'

export type GetApiRestNaaccrVersionIdArgs = {version: string, id: string};

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

export const allowedCode = z.object({code: z.string().optional(), description: z.string().optional()});

export const naaccrItemDto = z.object({item_number: z.string().optional(), item_name: z.string().optional(), item_data_type: z.string().optional(), item_length: z.string().optional(), year_implemented: z.string().optional(), version_implemented: z.string().optional(), xml_naaccr_id: z.string().optional(), xml_parent_id: z.string().optional(), record_types: z.array(z.string()).optional(), section: z.string().optional(), source_of_standard: z.string().optional(), date_created: z.string().optional(), date_modified: z.string().optional(), description: z.string().optional(), general_notes: z.string().optional(), clarification: z.string().optional(), rationale: z.string().optional(), npcr_collect: z.string().optional(), coc_collect: z.string().optional(), seer_collect: z.string().optional(), cccr_collect: z.string().optional(), alternate_names: z.array(z.string()).optional(), format: z.string().optional(), code_note: z.string().optional(), code_description: z.string().optional(), allowable_values: z.string().optional(), allowed_codes: z.array(allowedCode).optional(), year_retired: z.string().optional(), version_retired: 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 a single NAACCR item by XML ID or item number
 * 
 * GET /rest/naaccr/{version}/{id}
 */
export const getApiRestNaaccrVersionId = async (args: GetApiRestNaaccrVersionIdArgs, options?: GetApiRestNaaccrVersionIdOptions) => {
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 (apiKeyScheme !== undefined) headers.set("X-SEERAPI-Key", apiKeyScheme)

const url = `${baseUrl.replace(/\/+$/, '')}/rest/naaccr/${encodeURIComponent(String(args.version))}/${encodeURIComponent(String(args.id))}${query.size > 0 ? `?${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(naaccrItemDto, await res.json())
};