import {z} from 'zod'

export type CreateUserGroupRequestBody = {user_group: {name?: string | undefined}};

export type CreateApiWorkspaceGroupsArgs = {workspace: string, body: CreateUserGroupRequestBody};

export type CreateApiWorkspaceGroupsOptions = {baseUrl?: string | undefined, accessTokenAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const link = z.object({href: z.string(), templated: z.boolean().optional()});

export const userGroupLinks = z.object({self: link, web: link, creator: link.optional(), group_memberships: link, membership_by_id: link, memberships_preview: link});

export const userGroupEmbeds = z.unknown();

export const userGroup = z.object({token: z.string(), group_type: z.string(), name: z.string(), description: z.string(), state: z.string(), member_count: z.string(), spaces_count: z.string(), data_sources_count: z.string(), managed: z.string(), _links: userGroupLinks, _embedded: userGroupEmbeds.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
};

/**
 * Create a group
 * 
 * POST /{workspace}/groups
 */
export const createApiWorkspaceGroups = async (args: CreateApiWorkspaceGroupsArgs, options?: CreateApiWorkspaceGroupsOptions) => {
const {baseUrl = "https://modeanalytics.com/api", fetch: fetchFn = fetch, accessTokenAuth} = options ?? {}

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

if (accessTokenAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${accessTokenAuth.username}:${accessTokenAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/${encodeURIComponent(String(args.workspace))}/groups${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(userGroup, await res.json())
};