import {z} from 'zod'

export type GetApiInternalV1MetricsProjectIdExploreArgs = {project_id: number, time_start: string, time_end: string, search?: string | undefined, instrument?: Array<string> | undefined, library_name?: Array<string> | undefined, attr_key_exists?: Array<string> | undefined};

export type GetApiInternalV1MetricsProjectIdExploreOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const exploredMetric = z.object({name: z.string(), instrument: z.enum(["histogram", "summary", "counter", "prom-counter", "gauge", "additive"]), unit: z.string().optional(), description: z.string().optional(), attrKeys: z.array(z.string()).optional(), libraryName: z.string().optional(), libraryVersion: z.string().optional(), numTimeseries: z.number().int().optional()});

export const exploreMetricsResponse = z.object({metrics: z.array(exploredMetric), hasMore: z.boolean(), search: z.array(z.record(z.string(), z.unknown())).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
};

/**
 * Explore metrics
 * 
 * GET /internal/v1/metrics/{project_id}/explore
 * 
 * Also accepts auth: authTokenQuery
 */
export const getApiInternalV1MetricsProjectIdExplore = async (args: GetApiInternalV1MetricsProjectIdExploreArgs, options?: GetApiInternalV1MetricsProjectIdExploreOptions) => {
const {baseUrl = "https://api.uptrace.dev", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.time_start != null) query.append("time_start", String(args.time_start))
if (args.time_end != null) query.append("time_end", String(args.time_end))
if (args.search != null) query.append("search", String(args.search))
for (const item of args.instrument ?? []) query.append("instrument", String(item))
for (const item of args.library_name ?? []) query.append("library_name", String(item))
for (const item of args.attr_key_exists ?? []) query.append("attr_key_exists", String(item))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/internal/v1/metrics/${encodeURIComponent(String(args.project_id))}/explore${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(exploreMetricsResponse, await res.json())
};