import {z} from 'zod'

export type GetApiObservationsQualityGradesArgs = {fields?: string | undefined, 'X-HTTP-Method-Override'?: string | undefined};

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

export const resultsObservationsQualityGrades = z.object({total_results: z.number().int(), page: z.number().int(), per_page: z.number().int(), results: z.array(z.object({quality_grade: z.string(), count: z.number().int()}))});

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
};

/**
 * Fetch observation quality grade counts
 * 
 * GET /observations/quality_grades
 */
export const getApiObservationsQualityGrades = async (args: GetApiObservationsQualityGradesArgs, options?: GetApiObservationsQualityGradesOptions) => {
const {baseUrl = "https://api.inaturalist.org/v2", fetch: fetchFn = fetch, userJwtOptional} = options ?? {}

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

if (args.fields != null) query.append("fields", String(args.fields))
if (args['X-HTTP-Method-Override'] != null) headers.set("X-HTTP-Method-Override", String(args['X-HTTP-Method-Override']))
if (userJwtOptional !== undefined) headers.set("Authorization", userJwtOptional)

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