import {z} from 'zod'

export type CreateApiV1UploadArgs = {c: number, o: number, d?: boolean | undefined, body: BodyInit};

export type CreateApiV1UploadOptions = {baseUrl?: string | undefined, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiV1UploadResponse = z.object({response: z.object({status: z.object({}).optional(), quotaConsumed: z.object({numChars: z.string().optional(), numMetadataChars: z.string().optional()}).optional()}).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
};

/**
 * The File Upload API can be used to index binary files like PDFs, Word Documents, and similar.
 * 
 * POST /v1/upload
 * 
 * Also accepts auth: oAuth
 */
export const createApiV1Upload = async (args: CreateApiV1UploadArgs, options?: CreateApiV1UploadOptions) => {
const {baseUrl = "https://api.vectara.io", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.c != null) query.append("c", String(args.c))
if (args.o != null) query.append("o", String(args.o))
if (args.d != null) query.append("d", String(args.d))
if (ApiKeyAuth !== undefined) headers.set("x-api-key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/upload${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: args.body})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiV1UploadResponse, await res.json())
};