import {z} from 'zod'

export type GetApiGetJSONArgs = {query: string};

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

export const query = z.object({queryString: z.string().optional(), class: z.string().optional()});

export const queryRequest = z.object({query: query.optional(), criteria: z.string().optional()});

export const fieldsDocTypeRef = z.object({"@name": z.string(), "*body": z.string().optional(), "@xlink:type": z.string().optional(), "@xlink:href": z.string().optional()});

export const classDocTypeRef = z.object({"@name": z.string(), "@recordNumber": z.string(), field: z.array(fieldsDocTypeRef)});

export const xlink4 = z.object({"@number": z.string(), "@xlink:type": z.string(), "@xlink:href": z.string(), "*body": z.string()});

export const xlink2 = z.object({"@count": z.string(), page: xlink4});

export const xlink5 = z.object({ErrorMessage: z.string()});

export const xlink3 = z.object({Error: z.array(xlink5)});

export const xlink1 = z.object({recordCounter: z.array(z.string()).optional(), class: z.array(classDocTypeRef).optional(), pages: xlink2.optional(), start: z.string().optional(), end: z.string().optional(), Errors: xlink3.optional()});

export const xlink = z.object({queryRequest: queryRequest.optional(), queryResponse: xlink1});

export const getXMLDoc = z.object({"@encoding": z.string(), "xlink:httpQuery": xlink});

export const getJSONGETResponse = z.object({getXMLDocnew: getXMLDoc});

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 /GetJSON
 */
export const getApiGetJSON = async (args: GetApiGetJSONArgs, options?: GetApiGetJSONOptions) => {
const {baseUrl = "https://cadsrapi.cancer.gov/caDSR5.0/rest/getJSON", fetch: fetchFn = fetch} = options ?? {}

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

if (args.query != null) query.append("query", String(args.query))

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