import {z} from 'zod'

export type GetApiVectorIndexIdStatsArgs = {id: string, period?: ('1h' | '3h' | '12h' | '1d' | '3d' | '7d' | '30d') | undefined};

export type GetApiVectorIndexIdStatsOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const timeSeriesData = z.object({x: z.string(), y: z.number()});

export const vectorStats = z.object({pending_index_count: z.number().int().optional(), current_vector_count: z.number().int().optional(), daily_query_count: z.number().int().optional(), daily_update_count: z.number().int().optional(), monthly_query_count: z.number().int().optional(), monthly_update_count: z.number().int().optional(), monthly_bandwidth_usage: z.number().int().optional(), storage_usage: z.number().int().optional(), monthly_cost: z.number().optional(), daily_update_requests: z.array(timeSeriesData).optional(), daily_query_requests: z.array(timeSeriesData).optional(), daily_bandwidths: z.array(timeSeriesData).optional(), days: z.array(z.string()).optional(), query_throughput: z.array(timeSeriesData).optional(), update_throughput: z.array(timeSeriesData).optional(), query_latency_mean: z.array(timeSeriesData).optional(), query_latency_99: z.array(timeSeriesData).optional(), update_latency_mean: z.array(timeSeriesData).optional(), update_latency_99: z.array(timeSeriesData).optional(), embeds_latency_mean: z.array(timeSeriesData).optional(), embeds_latency_99: z.array(timeSeriesData).optional(), vector_count: z.array(timeSeriesData).optional(), data_size: z.array(timeSeriesData).optional(), daily_rerank_count: z.number().int().optional(), monthly_rerank_count: z.number().int().optional(), daily_rerank_requests: z.array(timeSeriesData).optional(), rerank_latency_mean: z.array(timeSeriesData).optional(), rerank_latency_99: z.array(timeSeriesData).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
};

/**
 * Get Index Stats
 * 
 * GET /vector/index/{id}/stats
 */
export const getApiVectorIndexIdStats = async (args: GetApiVectorIndexIdStatsArgs, options?: GetApiVectorIndexIdStatsOptions) => {
const {baseUrl = "https://api.upstash.com/v2", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.period != null) query.append("period", String(args.period))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/vector/index/${encodeURIComponent(String(args.id))}/stats${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(vectorStats, await res.json())
};