import {z} from 'zod'

export type CreateApiV1DocumentExtractTextArgs = {body: {file_content: string, language: 'english', file_type: 'Digital' | 'Scanned'}};

export type CreateApiV1DocumentExtractTextOptions = {baseUrl: string, KCustomerID?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiV1DocumentExtractTextResponse = z.object({code: z.number().int().optional(), data: z.object({file_id: z.string().optional(), action: z.string().optional(), file_status: z.string().optional(), output_type: z.string().optional()}).optional(), http_status: z.string().optional(), timestamp: z.number().int().optional(), status: z.string().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
};

/**
 * Extract text from a document
 * 
 * POST /v1/document/extract_text
 * 
 * Also accepts auth: Authorization
 */
export const createApiV1DocumentExtractText = async (args: CreateApiV1DocumentExtractTextArgs, options: CreateApiV1DocumentExtractTextOptions) => {
const {baseUrl, fetch: fetchFn = fetch, KCustomerID} = options ?? {}

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

if (KCustomerID !== undefined) headers.set("K-Customer-ID", KCustomerID)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/document/extract_text${query.size > 0 ? `?${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(createApiV1DocumentExtractTextResponse, await res.json())
};