import {z} from 'zod'

export type CreateApiNlInteractArgs = {Version: string, body: {sessionID: string, userPrompt: string}};

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

export const canAdd = z.boolean();

export const prompt = z.string();

export const knownAnswers = z.array(z.unknown());

export const question = z.object({subject: z.string().optional(), object: z.string().optional(), objectType: z.string().optional(), objectMetadata: z.record(z.string(), z.unknown()).optional(), dataType: z.string().optional(), relationship: z.string().optional(), type: z.string().optional(), plural: z.boolean().optional(), allowCF: z.boolean().optional(), allowUnknown: z.boolean().optional(), canAdd: canAdd.optional(), prompt: prompt.optional(), knownAnswers: knownAnswers.optional(), concepts: z.array(z.object({conceptType: z.string().optional(), name: z.string().optional(), type: z.string().optional(), value: z.string().optional(), invalidResponse: z.boolean().optional()})).optional()});

export const nLError = z.object({code: z.number().int().optional(), message: z.string().optional(), suggestedChatResponse: z.string().optional(), statusCode: z.string().optional()});

export const nLMetadata = z.object({querySubmittedAt: z.string().optional(), languageEngineResponseTime: z.number().int().optional(), llmTokens: z.object({completionTokens: z.number().int().optional(), promptTokens: z.number().int().optional(), totalTokens: z.number().int().optional()}).optional(), apiVersion: z.string().optional(), endpoint: z.string().optional(), sessionID: z.string().optional()});

export const subject = z.string();

export const relationship = z.string();

export const object = z.union([z.string(), z.number(), z.boolean()]);

export const certainty = z.number().gte(1).lte(100);

export const createApiNlInteractResponse = z.object({responseType: z.enum(["question", "result", "error"]), query: z.object({subject: z.string(), relationship: z.string(), object: z.string().optional()}).optional(), questions: z.array(question).optional(), results: z.array(z.object({Certainty: z.number().int().optional(), FactID: z.string().optional(), Object: z.string().optional(), ObjectMetadata: z.object({}).optional(), ObjectValue: z.string().optional(), Relationship: z.string().optional(), Subject: z.string().optional(), SubjectMetadata: z.object({}).optional(), SubjectValue: z.string().optional()})).optional(), error: nLError.optional(), metadata: nLMetadata.optional(), facts: z.object({injected: z.array(z.object({subject: subject.optional(), relationship: relationship.optional(), object: object.optional(), certainty: certainty.optional()})).optional(), invalid: z.array(z.object({subject: subject.optional(), relationship: relationship.optional(), object: object.optional(), certainty: certainty.optional()})).optional(), unmatched: z.array(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
};

/**
 * Interact (BETA) - natural language injection, queries and question responses
 * 
 * POST /nl/interact
 */
export const createApiNlInteract = async (args: CreateApiNlInteractArgs, options?: CreateApiNlInteractOptions) => {
const {baseUrl = "https://api.rainbird.ai", 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 (args.Version != null) headers.set("Version", String(args.Version))
if (apiKey !== undefined) headers.set("X-API-Key", apiKey)

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