import {z} from 'zod'

export type GatewayDistributionBucket = {distributionBins?: Array<number> | undefined, distributionCounts?: Array<unknown> | undefined, average?: number | undefined, median?: number | undefined, successCount?: unknown | undefined, failureCount?: unknown | undefined};

export type GatewayCorrelationRow = {values?: Array<number> | undefined};

export type GatewayCorrelationMatrix = {labels?: Array<string> | undefined, rows?: Array<GatewayCorrelationRow> | undefined};

export type GatewayDistributionSnapshot = {metrics?: {[key: string]: GatewayDistributionBucket} | undefined, correlation?: GatewayCorrelationMatrix | undefined};

export type GatewayTrainingSessionChunkOutput = {name?: string | undefined, step?: number | undefined, endOfEpoch?: boolean | undefined, outputDatasetName?: string | undefined, checkpointPath?: string | undefined, epochStreamlogPath?: string | undefined, distribution?: GatewayDistributionSnapshot | undefined, epochId?: string | undefined, createTime?: string | undefined, updateTime?: string | undefined};

export type CreateApiV1AccountsAccountIdTrainingSessionsTrainingSessionIdChunkOutputsArgs = {trainingSessionChunkOutputId?: string | undefined, account_id: string, training_session_id: string, body: GatewayTrainingSessionChunkOutput};

export type CreateApiV1AccountsAccountIdTrainingSessionsTrainingSessionIdChunkOutputsOptions = {baseUrl: string, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const gatewayDistributionBucket = z.object({distributionBins: z.array(z.number()).optional(), distributionCounts: z.array(z.string()).optional(), average: z.number().optional(), median: z.number().optional(), successCount: z.string().optional(), failureCount: z.string().optional()});

export const gatewayCorrelationRow = z.object({values: z.array(z.number()).optional()});

export const gatewayCorrelationMatrix = z.object({labels: z.array(z.string()).optional(), rows: z.array(gatewayCorrelationRow).optional()});

export const gatewayDistributionSnapshot = z.object({metrics: z.record(z.string(), gatewayDistributionBucket).optional(), correlation: gatewayCorrelationMatrix.optional()});

export const gatewayTrainingSessionChunkOutput = z.object({name: z.string().optional(), step: z.number().int().optional(), endOfEpoch: z.boolean().optional(), outputDatasetName: z.string().optional(), checkpointPath: z.string().optional(), epochStreamlogPath: z.string().optional(), distribution: gatewayDistributionSnapshot.optional(), epochId: z.string().optional(), createTime: z.string().optional(), updateTime: z.string().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
};

/**
 * Create a chunk-completion row on a TrainingSession (per-chunk
 * distributions, dataset refs, checkpoints). Trainer-driven write; the
 * server validates the parent session and materializes the row.
 * 
 * POST /v1/accounts/{account_id}/trainingSessions/{training_session_id}/chunkOutputs
 */
export const createApiV1AccountsAccountIdTrainingSessionsTrainingSessionIdChunkOutputs = async (args: CreateApiV1AccountsAccountIdTrainingSessionsTrainingSessionIdChunkOutputsArgs, options: CreateApiV1AccountsAccountIdTrainingSessionsTrainingSessionIdChunkOutputsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.trainingSessionChunkOutputId != null) query.append("trainingSessionChunkOutputId", String(args.trainingSessionChunkOutputId))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/accounts/${encodeURIComponent(String(args.account_id))}/trainingSessions/${encodeURIComponent(String(args.training_session_id))}/chunkOutputs${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(gatewayTrainingSessionChunkOutput, await res.json())
};