import {z} from 'zod'

export type ModelConfigPartNumber = {vectorQuantizatonMethod?: number | undefined, lowercaseInput?: boolean | undefined};

export type PartNumberRequest = {batch: Array<{text: string}>, modelConfig?: ModelConfigPartNumber | undefined};

export type CreateApiAiPredictionPartNumberDetectionCUSTOMDEPLOYMENTIDArgs = {CUSTOM_DEPLOYMENT_ID: string, Authorization: string, body: PartNumberRequest};

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

export const partNumberResponseTokens = z.object({response: z.string().optional(), labels: z.object({true: z.number().optional(), false: z.number().optional()}).optional(), tokensUsed: z.object({inputTokens: z.number().int().optional(), labelsTokens: z.number().int().optional()}).optional()});

export const partNumberResponse = z.object({predictions: z.array(partNumberResponseTokens).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
};

/**
 * Part Number Detection use case
 * 
 * POST /ai/prediction/part-number-detection/{CUSTOM_DEPLOYMENT_ID}
 */
export const createApiAiPredictionPartNumberDetectionCUSTOMDEPLOYMENTID = async (args: CreateApiAiPredictionPartNumberDetectionCUSTOMDEPLOYMENTIDArgs, options?: CreateApiAiPredictionPartNumberDetectionCUSTOMDEPLOYMENTIDOptions) => {
const {baseUrl = "https://commerce_studio_id.experiencemanager.lucidworks.com", fetch: fetchFn = fetch, authToken} = options ?? {}

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

if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))
if (authToken !== undefined) headers.set('authorization', `Bearer ${authToken}`)

const url = `${baseUrl.replace(/\/+$/, '')}/ai/prediction/part-number-detection/${encodeURIComponent(String(args.CUSTOM_DEPLOYMENT_ID))}${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(partNumberResponse, await res.json())
};