import {z} from 'zod'

export type Cursor = string;

export type PaginationDirection = 'next' | 'prev';

export type DatasetStatus = 'idle' | 'processing';

export type GetApiDocumentsV2DatasetsArgs = {cursor?: (Cursor | null) | undefined, direction?: PaginationDirection | undefined, limit?: number | undefined, status?: (DatasetStatus | null) | undefined, name?: (string | null) | undefined};

export type GetApiDocumentsV2DatasetsOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const datasetStatus = z.enum(["idle", "processing"]);

export const paginatedResultDataset = z.object({items: z.array(z.object({name: z.string(), dataset_id: z.string(), description: z.string().nullable().optional(), status: datasetStatus, created_at: z.string(), updated_at: z.string()})), has_more: z.boolean(), next_cursor: z.string().nullable().optional(), prev_cursor: z.string().nullable().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 /documents/v2/datasets
 */
export const getApiDocumentsV2Datasets = async (args: GetApiDocumentsV2DatasetsArgs, options?: GetApiDocumentsV2DatasetsOptions) => {
const {baseUrl = "https://api.tensorlake.ai", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.direction != null) query.append("direction", String(args.direction))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.status != null) query.append("status", String(args.status))
if (args.name != null) query.append("name", String(args.name))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/documents/v2/datasets${query.size > 0 ? `?${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(paginatedResultDataset, await res.json())
};