import {z} from 'zod'

export type GetApiApiV2LlmObsV1TopicDiscoveryTemplatesOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, appKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const lLMObsPatternsTemplateItem = z.object({clustering_instructions: z.string(), created_at: z.string(), description: z.string(), evp_query_prefix: z.string(), id: z.string(), name: z.string(), scope: z.string(), template: z.string(), time_frame_duration_ms: z.number().int()});

export const lLMObsPatternsTemplateItemsList = z.array(lLMObsPatternsTemplateItem);

export const lLMObsPatternsTemplatesResponseAttributes = z.object({templates: lLMObsPatternsTemplateItemsList});

export const lLMObsPatternsTemplatesListType = z.literal("list_topic_discovery_templates_response");

export const lLMObsPatternsTemplatesResponseData = z.object({attributes: lLMObsPatternsTemplatesResponseAttributes, id: z.string(), type: lLMObsPatternsTemplatesListType});

export const lLMObsPatternsTemplatesResponse = z.object({data: lLMObsPatternsTemplatesResponseData});

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
};

/**
 * List patterns templates
 * 
 * GET /api/v2/llm-obs/v1/topic-discovery-templates
 * 
 * Also accepts auth: AuthZ
 */
export const getApiApiV2LlmObsV1TopicDiscoveryTemplates = async (options?: GetApiApiV2LlmObsV1TopicDiscoveryTemplatesOptions) => {
const {baseUrl = "https://api.datadoghq.com", fetch: fetchFn = fetch, apiKeyAuth, appKeyAuth} = options ?? {}

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

if (apiKeyAuth !== undefined) headers.set("DD-API-KEY", apiKeyAuth)
if (appKeyAuth !== undefined) headers.set("DD-APPLICATION-KEY", appKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/llm-obs/v1/topic-discovery-templates${query.size > 0 ? `?${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(lLMObsPatternsTemplatesResponse, await res.json())
};