import {z} from 'zod'

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

export const token = z.object({promptTokens: z.number().int().optional(), completionTokens: z.number().int().optional(), totalTokens: z.number().int().optional()});

export const faqEnrichmentResponseTokens = z.object({faqPairs: z.array(z.object({question: z.string(), answer: z.string()})).optional(), tokensUsed: token.optional()});

export const faqEnrichmentResponse = z.object({predictions: z.array(faqEnrichmentResponseTokens).optional()});

export const passthroughResponseTokens = z.object({response: z.string().optional(), tokensUsed: token.optional()});

export const passthroughResponse = z.object({predictions: z.array(passthroughResponseTokens).optional()});

export const ragExtDocResponseTokens = z.object({response: z.string().optional(), tokensUsed: token.optional(), answer: z.string().optional(), sources: z.array(z.string()).optional(), memoryUuid: z.string().optional(), answerNotFoundMessage: z.string().optional(), answerFound: z.boolean().optional()});

export const ragExtDocResponse = z.object({predictions: z.array(ragExtDocResponseTokens).optional()});

export const standaloneResponseTokens = z.object({response: z.string().optional(), tokensUsed: token.optional()});

export const standaloneResponse = z.object({predictions: z.array(standaloneResponseTokens).optional()});

export const summarizationResponseTokens = z.object({tokensUsed: token.optional(), response: z.string().optional()});

export const summarizationResponse = z.object({predictions: z.array(summarizationResponseTokens).optional()});

export const keywordExtractionResponseTokens = z.object({response: z.string().optional(), tokensUsed: token.optional(), keywords: z.array(z.unknown()).optional()});

export const keywordExtractionResponse = z.object({predictions: z.array(keywordExtractionResponseTokens).optional()});

export const nerResponseTokens = z.object({tokensUsed: token.optional(), entities: z.object({entity: z.array(z.string()).optional()}).optional(), response: z.string().optional()});

export const nerResponse = z.object({predictions: z.array(nerResponseTokens).optional()});

export const getApiAiAsyncPredictionPREDICTIONIDResponse = z.union([faqEnrichmentResponse, passthroughResponse, ragExtDocResponse, standaloneResponse, summarizationResponse, keywordExtractionResponse, nerResponse]);

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
};

/**
 * Get prediction results
 * 
 * GET /ai/async-prediction/{PREDICTION_ID}
 */
export const getApiAiAsyncPredictionPREDICTIONID = async (options?: GetApiAiAsyncPredictionPREDICTIONIDOptions) => {
const {baseUrl = "https://commerce_studio_id.experiencemanager.lucidworks.com", fetch: fetchFn = fetch, authToken} = options ?? {}

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

if (authToken !== undefined) headers.set('authorization', `Bearer ${authToken}`)

const url = `${baseUrl.replace(/\/+$/, '')}/ai/async-prediction/${encodeURIComponent(String(args.PREDICTION_ID))}${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(getApiAiAsyncPredictionPREDICTIONIDResponse, await res.json())
};