import {z} from 'zod'

export type GetApiAgenticObservabilityIterationsHistogramArgs = {agent_id?: (string | null) | undefined, from?: (string | null) | undefined, to?: (string | null) | undefined, buckets?: number | undefined};

export type GetApiAgenticObservabilityIterationsHistogramOptions = {baseUrl?: string | undefined, FronteggHTTPAuthentication?: string | undefined, fetch?: typeof fetch | undefined};

export const observabilityHistogramBucket = z.object({bucket_start: z.string(), success: z.number().int(), error: z.number().int(), denied: z.number().int()});

export const observabilityHistogramResponse = z.object({buckets: z.array(observabilityHistogramBucket), total: z.number().int()});

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 Observability Iterations Histogram
 * 
 * GET /agentic/observability/iterations/histogram
 */
export const getApiAgenticObservabilityIterationsHistogram = async (args: GetApiAgenticObservabilityIterationsHistogramArgs, options?: GetApiAgenticObservabilityIterationsHistogramOptions) => {
const {baseUrl = "https://api.streamkap.com", fetch: fetchFn = fetch, FronteggHTTPAuthentication} = options ?? {}

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

if (args.agent_id != null) query.append("agent_id", String(args.agent_id))
if (args.from != null) query.append("from", String(args.from))
if (args.to != null) query.append("to", String(args.to))
if (args.buckets != null) query.append("buckets", String(args.buckets))
if (FronteggHTTPAuthentication !== undefined) headers.set('authorization', `Bearer ${FronteggHTTPAuthentication}`)

const url = `${baseUrl.replace(/\/+$/, '')}/agentic/observability/iterations/histogram${query.size > 0 ? `?${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(observabilityHistogramResponse, await res.json())
};