import {z} from 'zod'

export type GetApiTimeseriesStreamIndexLevelsArgs = {indexes: Array<string>, include_verification?: boolean | undefined, backfill?: ('latest' | 'none') | undefined, pretty?: boolean | undefined};

export type GetApiTimeseriesStreamIndexLevelsOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const index = z.string();

export const time = z.string();

export const indexLevelValue = z.string();

export const verificationTime = z.string();

export const verificationIndexLevelValue = z.string();

export const signature = z.string();

export const verification = z.object({timestamp: verificationTime.optional(), level: verificationIndexLevelValue.optional(), signature: signature});

export const cmSequenceId = z.string();

export const streamingIndexLevel = z.object({index: index, time: time, level: indexLevelValue, verification: verification.optional(), cm_sequence_id: cmSequenceId});

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
};

/**
 * Index levels
 * 
 * GET /timeseries-stream/index-levels
 */
export const getApiTimeseriesStreamIndexLevels = async (args: GetApiTimeseriesStreamIndexLevelsArgs, options?: GetApiTimeseriesStreamIndexLevelsOptions) => {
const {baseUrl = "https://api.coinmetrics.io/v4", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.indexes != null) query.append("indexes", args.indexes.join(','))
if (args.include_verification != null) query.append("include_verification", String(args.include_verification))
if (args.backfill != null) query.append("backfill", String(args.backfill))
if (args.pretty != null) query.append("pretty", String(args.pretty))
if (apiKey !== undefined) query.set("api_key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/timeseries-stream/index-levels${query.size > 0 ? `?${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(streamingIndexLevel, await res.json())
};