import {z} from 'zod'

export type PopInputKobold = {name?: string | undefined, priority_usernames?: Array<string> | undefined, nsfw?: boolean | undefined, models?: Array<string> | undefined, bridge_agent?: string | undefined, threads?: number | undefined, require_upfront_kudos?: boolean | undefined, amount?: number | undefined, max_length?: number | undefined, max_context_length?: number | undefined, softprompts?: Array<string> | undefined};

export type CreateApiV2GenerateTextPopArgs = {apikey: string, 'X-Fields'?: unknown | undefined, body: PopInputKobold};

export type CreateApiV2GenerateTextPopOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const modelPayload = z.object({prompt: z.string().optional(), n: z.number().int().optional(), seed: z.string().optional()});

export const noValidRequestFound = z.object({worker_id: z.number().int().gte(0).optional(), performance: z.number().int().gte(0).optional(), nsfw: z.number().int().gte(0).optional(), blacklist: z.number().int().gte(0).optional(), untrusted: z.number().int().gte(0).optional(), models: z.number().int().gte(0).optional(), bridge_version: z.number().int().gte(0).optional(), kudos: z.number().int().optional()});

export const generationPayload = z.object({payload: modelPayload.optional(), id: z.string().optional(), skipped: noValidRequestFound.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
};

/**
 * Check if there are generation requests queued for fulfillment
 * 
 * POST /v2/generate/text/pop
 */
export const createApiV2GenerateTextPop = async (args: CreateApiV2GenerateTextPopArgs, options: CreateApiV2GenerateTextPopOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.apikey != null) headers.set("apikey", String(args.apikey))
if (args['X-Fields'] != null) headers.set("X-Fields", String(args['X-Fields']))

const url = `${baseUrl.replace(/\/+$/, '')}/v2/generate/text/pop${query.size > 0 ? `?${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(generationPayload, await res.json())
};