import {z} from 'zod'

export type CreateApiKbEntriesArgs = {body: {question: string, answer?: (string | null) | undefined, comment?: (string | null) | undefined, accessLevel?: ('public' | 'private' | 'internal') | undefined}};

export type CreateApiKbEntriesOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiKbEntriesResponse = z.object({ok: z.boolean().optional(), result: z.object({id: z.string().optional(), source: z.literal("manual").optional(), subtype: z.object({raw: z.array(z.literal("Custom")).optional(), pretty: z.array(z.literal("Custom")).optional()}).optional(), content: z.string().optional(), product: z.unknown(), answer: z.string().nullable().optional(), comment: z.string().nullable().optional(), pageNumber: z.unknown(), questionNumber: z.unknown(), createdAt: z.string().optional(), modifiedAt: z.string().optional()}).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
};

/**
 * Create Knowledge Base Entry
 * 
 * POST /kb/entries
 */
export const createApiKbEntries = async (args: CreateApiKbEntriesArgs, options?: CreateApiKbEntriesOptions) => {
const {baseUrl = "https://app.safebase.io/api/ext/v1/rest", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (apiKey !== undefined) headers.set("x-sb-api-key", apiKey)

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