import {z} from 'zod'

export type GetApiResourcesCommonPropertiesArgs = {resource: string, parent_class: string};

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

export const commonProperties = z.object({common_property: z.string(), resource_property: z.string()});

export const callstackItem = z.object({service: z.string(), flowStep: z.string()});

export const apiResponse = z.object({type: z.string(), message: z.string().optional(), service: z.string().optional(), time: z.string().optional(), ssnid: z.string().optional(), callStack: z.array(callstackItem).optional()});

export const resourcescommonPropertiesGETResponse = z.object({results: z.array(commonProperties), apiResponse: apiResponse});

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
};

/**
 * Common Properties Of A Resource - Q6
 * 
 * GET /resources/common_properties
 */
export const getApiResourcesCommonProperties = async (args: GetApiResourcesCommonPropertiesArgs, options?: GetApiResourcesCommonPropertiesOptions) => {
const {baseUrl = "https://cadsrapi.cancer.gov/si-api/v1", fetch: fetchFn = fetch} = options ?? {}

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

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

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