import {z} from 'zod'

export type BulkUserAction = 1 | 2 | 3 | 4;

export type BulkUserActionRequest = {userIds: Array<number>, action: BulkUserAction, value?: (string | null) | undefined};

export type CreateApiV1UsersBulkActionArgs = {body: BulkUserActionRequest};

export type CreateApiV1UsersBulkActionOptions = {baseUrl: string, Bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const bulkUserActionResult = z.object({userId: z.number().int().optional(), success: z.boolean().optional(), error: z.string().nullable().optional()});

export const bulkUserActionResponse = z.object({succeeded: z.number().int().optional(), failed: z.number().int().optional(), results: z.array(bulkUserActionResult).nullable().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
};

/**
 * IDT-934: owner-only bulk operations over a user selection — passivate, change brand, change profile,
 * change group. Each user is processed independently; per-user failures are reported in the response and
 * do not abort the batch (not transactional). Action payloads reuse the validated single-user paths
 * (Save / AddUserToProfile / UserChangeGroups), so the existing assignment and audit rules still apply.
 * 
 * POST /v1/users/bulk-action
 * 
 * Also accepts auth: API Key
 */
export const createApiV1UsersBulkAction = async (args: CreateApiV1UsersBulkActionArgs, options: CreateApiV1UsersBulkActionOptions) => {
const {baseUrl, fetch: fetchFn = fetch, Bearer} = options ?? {}

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

if (Bearer !== undefined) headers.set('authorization', `Bearer ${Bearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/users/bulk-action${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(bulkUserActionResponse, await res.json())
};