import {z} from 'zod'

export type GetApiV1Args = {skip?: number | undefined, take?: number | undefined, order?: ({[key: string]: 'ASC' | 'DESC'}) | undefined, userTypes?: (Array<'ADMIN' | 'INNOVATOR' | 'ACCESSOR' | 'ASSESSMENT' | 'QUALIFYING_ACCESSOR'>) | undefined, organisationUnitId?: string | undefined, onlyActive?: boolean | undefined, fields?: Array<'email'> | undefined};

export type GetApiV1Options = {baseUrl: string, fetch?: typeof fetch | undefined};

export const getApiV1Response = z.object({id: 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
};

/**
 * Get users list
 * 
 * GET /v1
 */
export const getApiV1 = async (args: GetApiV1Args, options: GetApiV1Options) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.skip != null) query.append("skip", String(args.skip))
if (args.take != null) query.append("take", String(args.take))
if (args.order != null) query.append("order", JSON.stringify(args.order))
for (const item of args.userTypes ?? []) query.append("userTypes", String(item))
if (args.organisationUnitId != null) query.append("organisationUnitId", String(args.organisationUnitId))
if (args.onlyActive != null) query.append("onlyActive", String(args.onlyActive))
for (const item of args.fields ?? []) query.append("fields", String(item))

const url = `${baseUrl.replace(/\/+$/, '')}/v1${query.size > 0 ? `?${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(getApiV1Response, await res.json())
};