import {z} from 'zod'

export type GetApiDatasetsIdSummaryArgs = {id: string, columns?: string | undefined, top_values?: number | undefined};

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

export const datasetColumnSummary = z.object({name: z.string().optional(), kind: z.enum(["input", "output"]).optional(), states: z.object({pending: z.number().int().optional(), stale: z.number().int().optional(), failed: z.number().int().optional(), not_found: z.number().int().optional(), ok: z.number().int().optional(), manual: z.number().int().optional()}).optional(), filled: z.number().int().optional(), distinct_values: z.number().int().optional(), values: z.array(z.object({value: z.unknown(), count: z.number().int().optional()})).optional()});

export const datasetSummary = z.object({row_count: z.number().int().optional(), columns: z.array(datasetColumnSummary).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
};

/**
 * summarize columns
 * 
 * GET /datasets/{id}/summary
 */
export const getApiDatasetsIdSummary = async (args: GetApiDatasetsIdSummaryArgs, options?: GetApiDatasetsIdSummaryOptions) => {
const {baseUrl = "https://api.riveterhq.com/v1", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/datasets/${encodeURIComponent(String(args.id))}/summary${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(datasetSummary, await res.json())
};