import {z} from 'zod'

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

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

export const scimName = z.object({givenName: z.string().optional(), familyName: z.string().optional()});

export const scimEmail = z.object({value: z.string().optional(), primary: z.boolean().optional()});

export const scimRole = z.object({type: z.string().optional(), value: z.string().optional()});

export const scimMeta = z.object({resourceType: z.string().optional(), created: z.string().optional(), lastModified: z.string().optional(), location: z.string().optional()});

export const scimUser = z.object({schemas: z.array(z.string()).optional(), id: z.string().optional(), externalId: z.string().optional(), userName: z.string().optional(), name: scimName.optional(), emails: z.array(scimEmail).optional(), active: z.boolean().optional(), locale: z.string().optional(), timezone: z.string().optional(), roles: z.array(scimRole).optional(), meta: scimMeta.optional()});

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

/**
 * List users
 * 
 * GET /scim/Users
 */
export const getApiScimUsers = async (args: GetApiScimUsersArgs, options?: GetApiScimUsersOptions) => {
const {baseUrl = "https://eu.phrase.com/control-hub", fetch: fetchFn = fetch, scimToken} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/scim/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(scimListResponse, await res.json())
};