import {z} from 'zod'

export type GetIteratorRequest = {document_id?: (number | null) | undefined, skip?: number | undefined, take?: number | undefined, include_deleted?: boolean | undefined, include_document?: boolean | undefined, fields?: Array<string> | undefined};

export type CreateApiApiV1IndexIndexIdIteratorArgs = {apikey: string, index_id: number, body: GetIteratorRequest};

export type CreateApiApiV1IndexIndexIdIteratorOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const iteratorResultItem = z.object({doc_id: z.number().int().gte(0), doc: z.record(z.string(), z.unknown()).nullable().optional()});

export const iteratorResult = z.object({skip: z.number().int().gte(0), results: z.array(iteratorResultItem)});

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
};

/**
 * Document iterator
 * 
 * POST /api/v1/index/{index_id}/iterator
 */
export const createApiApiV1IndexIndexIdIterator = async (args: CreateApiApiV1IndexIndexIdIteratorArgs, options?: CreateApiApiV1IndexIndexIdIteratorOptions) => {
const {baseUrl = "http://127.0.0.1", fetch: fetchFn = fetch} = options ?? {}

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

if (args.apikey != null) headers.set("apikey", String(args.apikey))

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/index/${encodeURIComponent(String(args.index_id))}/iterator${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(iteratorResult, await res.json())
};