import {z} from 'zod'

export type GetApiUsersUserIdPreferencesTopicIdArgs = {user_id: string, topic_id: string, tenant_id?: (string | null) | undefined};

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

export const channelClassification = z.enum(["direct_message", "email", "push", "sms", "webhook", "inbox"]);

export const preferenceStatus = z.enum(["OPTED_IN", "OPTED_OUT", "REQUIRED"]);

export const usersTopicPreference = z.object({custom_routing: z.array(channelClassification).nullable().optional(), default_status: preferenceStatus, has_custom_routing: z.boolean().nullable().optional(), status: preferenceStatus, topic_id: z.string(), topic_name: z.string()});

export const usersUserPreferencesGetResponse = z.object({topic: usersTopicPreference});

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 user subscription topic
 * 
 * GET /users/{user_id}/preferences/{topic_id}
 */
export const getApiUsersUserIdPreferencesTopicId = async (args: GetApiUsersUserIdPreferencesTopicIdArgs, options?: GetApiUsersUserIdPreferencesTopicIdOptions) => {
const {baseUrl = "https://api.courier.com", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/users/${encodeURIComponent(String(args.user_id))}/preferences/${encodeURIComponent(String(args.topic_id))}${query.size > 0 ? `?${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(usersUserPreferencesGetResponse, await res.json())
};