import {z} from 'zod'

export type GetApiSubscriptionsExternalSubscriptionIdAlertsArgs = {external_subscription_id: string, per_page?: number | undefined, page?: number | undefined};

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

export const metricType = z.enum(["METERED", "RECURRING"]);

export const metricAggregationType = z.enum(["COUNT", "SUM", "MAX", "COUNT_DISTINCT", "LATEST"]).nullable();

export const dateTimeWithZone = z.string();

export const metricResponse = z.object({name: z.string(), code: z.string(), type: metricType.optional(), description: z.string().optional(), aggregation_type: metricAggregationType, aggregation_field: z.string().optional(), field_filters: z.array(z.object({key: z.string(), values: z.array(z.string())})).optional(), id: z.string(), created_at: dateTimeWithZone, updated_at: dateTimeWithZone.optional()});

export const alertType = z.enum(["CURRENT_USAGE_AMOUNT", "METRIC_CURRENT_USAGE_AMOUNT", "METRIC_CURRENT_USAGE_UNITS", "LIFETIME_USAGE_AMOUNT"]);

export const alertThreshold = z.object({code: z.string().optional(), value: z.string(), recurring: z.boolean().optional()});

export const alert = z.object({id: z.string().optional(), external_subscription_id: z.string().optional(), metric: metricResponse.optional(), type: alertType.optional(), code: z.string().optional(), name: z.string().optional(), previous_value: z.number().optional(), last_processed_at: dateTimeWithZone.optional(), thresholds: z.array(alertThreshold).optional(), created_at: dateTimeWithZone.optional()});

export const paginationMetadata = z.object({total_count: z.number().int().optional(), total_pages: z.number().int().optional(), current_page: z.number().int().optional()});

export const alertList = z.object({alerts: z.array(alert).optional(), meta: paginationMetadata.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
};

/**
 * Retrieve subscription alerts
 * 
 * GET /subscriptions/{external_subscription_id}/alerts
 */
export const getApiSubscriptionsExternalSubscriptionIdAlerts = async (args: GetApiSubscriptionsExternalSubscriptionIdAlertsArgs, options?: GetApiSubscriptionsExternalSubscriptionIdAlertsOptions) => {
const {baseUrl = "https://api-m.sandbox.paypal.com", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

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

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