import {z} from 'zod'

export type DatasetUploadUrlRequest = {dataset_name: string, dataset_type?: ('classification' | 'ner' | 'custom' | 'decoder') | undefined, format?: ('jsonl' | 'csv' | 'tsv' | 'parquet' | 'json' | null) | undefined, filename?: (string | null) | undefined, schema?: (string | null) | undefined, project_id?: (string | null) | undefined, experiment_id?: (string | null) | undefined, type?: ('training' | 'evaluation' | 'benchmark' | null) | undefined, visibility?: (string | null) | undefined, generation_type?: ('upload' | null) | undefined, split_ratio?: ({[key: string]: number} | null) | undefined, column_mapping?: ({[key: string]: string} | null) | undefined};

export type CreateApiV1DatasetsUploadUrlArgs = {body: DatasetUploadUrlRequest};

export type CreateApiV1DatasetsUploadUrlOptions = {baseUrl: string, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const datasetUploadUrlResponse = z.object({presigned_url: z.string(), dataset_id: z.string(), dataset_name: z.string(), version_number: z.string(), expires_in: z.number().int(), upload_instructions: 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
};

/**
 * Get Upload Url
 * 
 * POST /v1/datasets/upload/url
 * 
 * Also accepts auth: BearerAuth
 */
export const createApiV1DatasetsUploadUrl = async (args: CreateApiV1DatasetsUploadUrlArgs, options: CreateApiV1DatasetsUploadUrlOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set("X-API-Key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/datasets/upload/url${query.size > 0 ? `?${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(datasetUploadUrlResponse, await res.json())
};