import {z} from 'zod'

export type GetApiScimV2UsersArgs = {filter?: string | undefined, count?: number | undefined, startIndex?: number | undefined};

export type GetApiScimV2UsersOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const sCIMUser = z.object({schemas: z.array(z.string()), id: z.string().min(1).optional(), externalId: z.string().optional(), userName: z.string().min(1).optional(), displayName: z.string().min(1).optional(), active: z.boolean().optional(), emails: z.array(z.object({primary: z.boolean().optional(), value: z.string().optional(), type: z.enum(["work", "home", "other"]).optional()})).optional(), name: z.object({givenName: z.string().optional(), familyName: z.string().optional()}).optional(), "urn:ietf:params:scim:schemas:extension:enterprise:2.0:User": z.object({employeeNumber: z.string().optional()}).optional(), groups: z.array(z.object({value: z.string().optional(), $ref: z.string().optional(), type: z.string().optional()})).optional(), meta: z.object({resourceType: z.string(), created: z.string(), lastModified: z.string(), location: z.string(), version: z.string()}).optional()});

export const getApiScimV2UsersResponse = z.object({schemas: z.array(z.string()), Resources: z.array(sCIMUser), totalResults: z.number().int(), startIndex: z.number().int(), itemsPerPage: 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
};

/**
 * List All Users
 * 
 * GET /scim/v2/Users
 */
export const getApiScimV2Users = async (args: GetApiScimV2UsersArgs, options?: GetApiScimV2UsersOptions) => {
const {baseUrl = "https://api.byndid.com", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.filter != null) query.append("filter", String(args.filter))
if (args.count != null) query.append("count", String(args.count))
if (args.startIndex != null) query.append("startIndex", String(args.startIndex))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/scim/v2/Users${query.size > 0 ? `?${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(getApiScimV2UsersResponse, await res.json())
};