import {z} from 'zod'

export type GetApiApiV1DatasetsDatasetIdPreprocessingCreditsArgs = {dataset_id: string, pages_to_process?: number | undefined, documents_to_process?: number | undefined};

export type GetApiApiV1DatasetsDatasetIdPreprocessingCreditsOptions = {baseUrl: string, bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const preprocessingInsufficientCreditsDto = z.object({creditsRequired: z.number(), creditsAvailable: z.number()});

export const preprocessingCreditsResponseDto = z.object({availableCredits: z.number(), extractionCost: z.number(), totalPages: z.number(), totalDocuments: z.number(), completedDocuments: z.number(), isFinal: z.boolean(), insufficientCredits: preprocessingInsufficientCreditsDto.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
};

/**
 * Estimate credit cost for document preprocessing
 * 
 * GET /api/v1/datasets/{dataset_id}/preprocessing-credits
 */
export const getApiApiV1DatasetsDatasetIdPreprocessingCredits = async (args: GetApiApiV1DatasetsDatasetIdPreprocessingCreditsArgs, options: GetApiApiV1DatasetsDatasetIdPreprocessingCreditsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearer} = options ?? {}

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

if (args.pages_to_process != null) query.append("pages_to_process", String(args.pages_to_process))
if (args.documents_to_process != null) query.append("documents_to_process", String(args.documents_to_process))
if (bearer !== undefined) headers.set('authorization', `Bearer ${bearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/datasets/${encodeURIComponent(String(args.dataset_id))}/preprocessing-credits${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(preprocessingCreditsResponseDto, await res.json())
};