import {z} from 'zod'

export type GetApiV1NotificationsTypesOptions = {baseUrl: string, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const notificationTypeView = z.object({event_type: z.string(), category: z.string(), display_name: z.string(), description: z.string(), default_severity: z.string(), supported_channels: z.array(z.string()), recommended: z.boolean(), template_id: z.string().nullable(), threshold_based: z.boolean(), threshold_config_schema: z.record(z.string(), z.unknown()).nullable(), payload_schema: z.record(z.string(), z.unknown()).nullable(), enabled: z.boolean(), severity_override: z.string().nullable(), threshold_config: z.record(z.string(), z.unknown()).nullable(), effective_severity: z.string(), delivery_mode: z.string(), rate_limit_per_hour: z.number().int().nullable(), resolved_destination_ids: z.array(z.string()), has_destination: z.boolean()});

export const getApiV1NotificationsTypesResponse = z.array(notificationTypeView);

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
};

/**
 * Browse the notification catalog merged with this org's config
 * 
 * GET /v1/notifications/types
 */
export const getApiV1NotificationsTypes = async (options: GetApiV1NotificationsTypesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/notifications/types${query.size > 0 ? `?${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(getApiV1NotificationsTypesResponse, await res.json())
};