import {z} from 'zod'

export type ModelGenerationInputKobold = {n?: number | undefined, frmtadsnsp?: boolean | undefined, frmtrmblln?: boolean | undefined, frmtrmspch?: boolean | undefined, frmttriminc?: boolean | undefined, max_context_length?: number | undefined, max_length?: number | undefined, rep_pen?: number | undefined, rep_pen_range?: number | undefined, rep_pen_slope?: number | undefined, singleline?: boolean | undefined, temperature?: number | undefined, tfs?: number | undefined, top_a?: number | undefined, top_k?: number | undefined, top_p?: number | undefined, typical?: number | undefined, sampler_order?: Array<number> | undefined, use_default_badwordsids?: boolean | undefined, stop_sequence?: Array<string> | undefined, min_p?: number | undefined, smoothing_factor?: number | undefined, dynatemp_range?: number | undefined, dynatemp_exponent?: number | undefined};

export type ExtraSourceImage = {image?: string | undefined, strength?: number | undefined};

export type GenerationInputKobold = {prompt?: string | undefined, params?: ModelGenerationInputKobold | undefined, softprompt?: string | undefined, trusted_workers?: boolean | undefined, slow_workers?: boolean | undefined, workers?: Array<string> | undefined, worker_blacklist?: boolean | undefined, models?: Array<string> | undefined, dry_run?: boolean | undefined, proxied_account?: string | undefined, extra_source_images?: Array<ExtraSourceImage> | undefined, disable_batching?: boolean | undefined, allow_downgrade?: boolean | undefined, webhook?: string | undefined};

export type CreateApiV2GenerateTextAsyncArgs = {apikey: string, 'Client-Agent'?: string | undefined, 'X-Fields'?: unknown | undefined, body: GenerationInputKobold};

export type CreateApiV2GenerateTextAsyncOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const requestSingleWarning = z.object({code: z.enum(["NoAvailableWorker", "ClipSkipMismatch", "StepsTooFew", "StepsTooMany", "CfgScaleMismatch", "CfgScaleTooSmall", "CfgScaleTooLarge", "SamplerMismatch", "SchedulerMismatch"]).optional(), message: z.string().min(1).optional()});

export const requestAsync = z.object({id: z.string().optional(), kudos: z.number().optional(), message: z.string().optional(), warnings: z.array(requestSingleWarning).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
};

/**
 * Initiate an Asynchronous request to generate text
 * 
 * POST /v2/generate/text/async
 */
export const createApiV2GenerateTextAsync = async (args: CreateApiV2GenerateTextAsyncArgs, options: CreateApiV2GenerateTextAsyncOptions) => {
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['Client-Agent'] != null) headers.set("Client-Agent", String(args['Client-Agent']))
if (args['X-Fields'] != null) headers.set("X-Fields", String(args['X-Fields']))

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