import {z} from 'zod'

export type PassthroughColumnMappingDto = {prompt: string, completion?: string | undefined, chosen?: string | undefined, rejected?: string | undefined, context?: Array<string> | undefined};

export type DatasetSourceDto = {url?: string | undefined, files?: Array<string> | undefined, sheet_names?: Array<string> | undefined, sheet_name?: string | undefined, access?: ('oauth' | 'public') | undefined, name?: string | undefined, file_format?: ('csv' | 'json' | 'jsonl' | 'parquet' | 'pdf' | 'docx' | 'pptx' | 'xlsx' | 'html' | 'zip' | 'txt') | undefined, processing_mode?: ('adapt' | 'raw') | undefined, column_mapping?: PassthroughColumnMappingDto | undefined};

export type CreateDatasetDto = {source: DatasetSourceDto};

export type CreateApiApiV1DatasetsArgs = {body: CreateDatasetDto};

export type CreateApiApiV1DatasetsOptions = {baseUrl: string, bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const uploadInstructionsDto = z.object({url: z.string(), method: z.string(), s3_key: z.string()});

export const createDatasetResponseDto = z.object({dataset_id: z.string(), status: z.string(), upload_instructions: uploadInstructionsDto.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 dataset from file upload, HuggingFace, Kaggle, Google Sheets, or a public S3 or Cloud Storage object
 * 
 * POST /api/v1/datasets
 */
export const createApiApiV1Datasets = async (args: CreateApiApiV1DatasetsArgs, options: CreateApiApiV1DatasetsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearer} = options ?? {}

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

if (bearer !== undefined) headers.set('authorization', `Bearer ${bearer}`)

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