import {z} from 'zod'

export type DbDataSparseValues = {indices: Array<number>, values: Array<number>};

export type DbDataQueryVector = {values: Array<number>, sparseValues?: DbDataSparseValues | undefined, topK?: number | undefined, namespace?: string | undefined, filter?: Record<string, never> | undefined};

export type DbDataQueryRequest = {namespace?: string | undefined, topK: number, filter?: Record<string, never> | undefined, includeValues?: boolean | undefined, includeMetadata?: boolean | undefined, queries?: Array<DbDataQueryVector> | undefined, vector?: Array<number> | undefined, sparseVector?: DbDataSparseValues | undefined, id?: string | undefined, scanFactor?: number | undefined, maxCandidates?: number | undefined};

export type CreateApiQueryArgs = {'X-Pinecone-Api-Version': string, body: DbDataQueryRequest};

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

export const dbDataSparseValues = z.object({indices: z.array(z.number().int()), values: z.array(z.number())});

export const dbDataScoredVector = z.object({id: z.string().min(1).max(512), score: z.number().optional(), values: z.array(z.number()).optional(), sparseValues: dbDataSparseValues.optional(), metadata: z.object({}).optional()});

export const dbDataSingleQueryResults = z.object({matches: z.array(dbDataScoredVector).optional(), namespace: z.string().optional()});

export const dbDataUsage = z.object({readUnits: z.number().int().optional()});

export const dbDataQueryResponse = z.object({results: z.array(dbDataSingleQueryResults).optional(), matches: z.array(dbDataScoredVector).optional(), namespace: z.string().optional(), usage: dbDataUsage.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
};

/**
 * Search with a vector
 * 
 * POST /query
 */
export const createApiQuery = async (args: CreateApiQueryArgs, options?: CreateApiQueryOptions) => {
const {baseUrl = "https://api.pinecone.io", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args['X-Pinecone-Api-Version'] != null) headers.set("X-Pinecone-Api-Version", String(args['X-Pinecone-Api-Version']))
if (ApiKeyAuth !== undefined) headers.set("Api-Key", ApiKeyAuth)

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