import {z} from 'zod'

export type QueryLogic = 'AND' | 'OR';

export type AppRoutesV3RagKeywordConfig = {logic: QueryLogic, keywords: Array<string>};

export type AppRoutesV3RagDateRange = {from?: (string | null) | undefined, to?: (string | null) | undefined};

export type BodyQueryRagDirectApiV3RagQueryDirectPost = {keyword_config?: (AppRoutesV3RagKeywordConfig | null) | undefined, date_range?: (AppRoutesV3RagDateRange | null) | undefined};

export type CreateApiApiV3RagQueryDirectArgs = {unique_id: string, description: string, search_category: string, body: BodyQueryRagDirectApiV3RagQueryDirectPost};

export type CreateApiApiV3RagQueryDirectOptions = {baseUrl: string, HTTPBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const ragQueryResponse = z.object({type: z.string(), content: z.string(), citations: z.array(z.record(z.string(), z.unknown())), summary: z.string(), is_starred: z.boolean()});

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
};

/**
 * Query Rag Direct
 * 
 * POST /api/v3/rag/query-direct
 */
export const createApiApiV3RagQueryDirect = async (args: CreateApiApiV3RagQueryDirectArgs, options: CreateApiApiV3RagQueryDirectOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (args.unique_id != null) query.append("unique_id", String(args.unique_id))
if (args.description != null) query.append("description", String(args.description))
if (args.search_category != null) query.append("search_category", String(args.search_category))
if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v3/rag/query-direct${query.size > 0 ? `?${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(ragQueryResponse, await res.json())
};