import {z} from 'zod'

export type ModelMetricModeV1 = 'CURRENT' | 'SUMMARY' | 'SERIES';

export type GetApiV1ModelsModelIdEnvironmentsEnvNameMetricsArgs = {mode?: ModelMetricModeV1 | undefined, start_epoch_millis?: (number | null) | undefined, end_epoch_millis?: (number | null) | undefined, metrics?: Array<string> | undefined};

export type GetApiV1ModelsModelIdEnvironmentsEnvNameMetricsOptions = {baseUrl: string, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const modelMetricModeV1 = z.enum(["CURRENT", "SUMMARY", "SERIES"]);

export const modelMetricUnitHintV1 = z.enum(["PER_SECOND", "SECONDS", "BYTES", "MEBIBYTES", "COUNT", "RATIO"]);

export const modelMetricKindV1 = z.enum(["GAUGE", "COUNTER", "HISTOGRAM"]);

export const modelMetricDescriptorV1 = z.object({name: z.string(), unit_hint: modelMetricUnitHintV1, kind: modelMetricKindV1, label_sets: z.array(z.record(z.string(), z.string()))});

export const modelMetricValueSetV1 = z.object({start_epoch_millis: z.number().int(), values: z.array(z.array(z.number().nullable()))});

export const getModelMetricsResponseV1 = z.object({start_epoch_millis: z.number().int(), end_epoch_millis: z.number().int(), mode: modelMetricModeV1, step_seconds: z.number().int().nullable(), metric_descriptors: z.array(modelMetricDescriptorV1), metric_values: z.array(modelMetricValueSetV1)});

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
};

/**
 * Gets the metrics for a model environment.
 * 
 * GET /v1/models/{model_id}/environments/{env_name}/metrics
 */
export const getApiV1ModelsModelIdEnvironmentsEnvNameMetrics = async (args: GetApiV1ModelsModelIdEnvironmentsEnvNameMetricsArgs, options: GetApiV1ModelsModelIdEnvironmentsEnvNameMetricsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.mode != null) query.append("mode", String(args.mode))
if (args.start_epoch_millis != null) query.append("start_epoch_millis", String(args.start_epoch_millis))
if (args.end_epoch_millis != null) query.append("end_epoch_millis", String(args.end_epoch_millis))
for (const item of args.metrics ?? []) query.append("metrics", String(item))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/models/${encodeURIComponent(String(args.model_id))}/environments/${encodeURIComponent(String(args.env_name))}/metrics${query.size > 0 ? `?${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(getModelMetricsResponseV1, await res.json())
};