import {z} from 'zod'

export type EventType = 'feedback' | 'run' | 'cube_run' | 'job_run' | 'slack_query' | 'api_query' | 'k8s_job' | 'query';

export type GetApiV4AdminStatisticsArgs = {types: Array<EventType>, teamIds: Array<string>, bucketMinutes?: number | undefined, windowHours?: number | undefined};

export type GetApiV4AdminStatisticsOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const eventDurationBucket = z.object({bucketStart: z.string(), avgDurationSec: z.number(), minDurationSec: z.number(), maxDurationSec: z.number(), avgMemoryBytes: z.number(), minMemoryBytes: z.number(), maxMemoryBytes: z.number(), requestCount: z.number().int()});

export const teamEventDurationStats = z.object({teamId: z.union([z.string(), z.string()]), teamDomain: z.string().nullable().optional(), buckets: z.array(eventDurationBucket)});

export const teamEventDurationStatsGroup = z.object({eventType: z.string(), teams: z.array(teamEventDurationStats)});

export const adminEventDurationStatsBatchResponse = z.object({bucketMinutes: z.number().int(), windowHours: z.number().int(), stats: z.array(teamEventDurationStatsGroup)});

export const responseMeta = z.object({requestId: z.string().optional(), timestamp: z.string().optional(), durationMs: z.number().int().nullable().optional()});

export const successResponseAdminEventDurationStatsBatchResponse = z.object({success: z.literal(true), data: adminEventDurationStatsBatchResponse, meta: responseMeta.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
};

/**
 * Batched event durations for several event types and teams in one request
 * 
 * GET /v4/admin/statistics
 */
export const getApiV4AdminStatistics = async (args: GetApiV4AdminStatisticsArgs, options: GetApiV4AdminStatisticsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

for (const item of args.types ?? []) query.append("types", String(item))
for (const item of args.teamIds ?? []) query.append("teamIds", String(item))
if (args.bucketMinutes != null) query.append("bucketMinutes", String(args.bucketMinutes))
if (args.windowHours != null) query.append("windowHours", String(args.windowHours))

const url = `${baseUrl.replace(/\/+$/, '')}/v4/admin/statistics${query.size > 0 ? `?${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(successResponseAdminEventDurationStatsBatchResponse, await res.json())
};