import {z} from 'zod'

export type GetApiListsListIdSubscriptionsArgs = {list_id: string, cursor?: (string | null) | undefined};

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

export const paging = z.object({cursor: z.string().nullable().optional(), more: z.boolean()});

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

export const rule = z.object({start: z.string().nullable().optional(), until: z.string()});

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

export const channelPreference = z.object({channel: channelClassification});

export const notificationPreferenceDetails = z.object({status: preferenceStatus, rules: z.array(rule).nullable().optional(), channel_preferences: z.array(channelPreference).nullable().optional()});

export const notificationPreferences = z.record(z.string(), notificationPreferenceDetails);

export const recipientPreferences = z.object({categories: notificationPreferences.optional(), notifications: notificationPreferences.optional()});

export const listSubscriptionRecipient = z.object({recipientId: z.string(), created: z.string().nullable().optional(), preferences: recipientPreferences.optional()});

export const listGetSubscriptionsResponse = z.object({paging: paging, items: z.array(listSubscriptionRecipient)});

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 the subscriptions for a list
 * 
 * GET /lists/{list_id}/subscriptions
 */
export const getApiListsListIdSubscriptions = async (args: GetApiListsListIdSubscriptionsArgs, options?: GetApiListsListIdSubscriptionsOptions) => {
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.cursor != null) query.append("cursor", String(args.cursor))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/lists/${encodeURIComponent(String(args.list_id))}/subscriptions${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(listGetSubscriptionsResponse, await res.json())
};