import {z} from 'zod'

export type GetApiKafkaV3ClustersClusterIdConsumerGroupsConsumerGroupIdOptions = {baseUrl?: string | undefined, resourceApiKey?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const resourceMetadata = z.object({self: z.string(), resource_name: z.string().nullable().optional()});

export const consumerGroupState = z.string();

export const consumerGroupType = z.string();

export const relationship = z.object({related: z.string()});

export const consumerGroupData = z.object({kind: z.string(), metadata: resourceMetadata, cluster_id: z.string(), consumer_group_id: z.string(), is_simple: z.boolean(), partition_assignor: z.string(), state: consumerGroupState, type: consumerGroupType, is_mixed_consumer_group: z.boolean(), coordinator: relationship, consumers: relationship, lag_summary: relationship});

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 Consumer Group
 * 
 * GET /kafka/v3/clusters/{cluster_id}/consumer-groups/{consumer_group_id}
 * 
 * Also accepts auth: external-access-token
 */
export const getApiKafkaV3ClustersClusterIdConsumerGroupsConsumerGroupId = async (options?: GetApiKafkaV3ClustersClusterIdConsumerGroupsConsumerGroupIdOptions) => {
const {baseUrl = "https://api.confluent.cloud", fetch: fetchFn = fetch, resourceApiKey} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/kafka/v3/clusters/${encodeURIComponent(String(args.cluster_id))}/consumer-groups/${encodeURIComponent(String(args.consumer_group_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(consumerGroupData, await res.json())
};