import {z} from 'zod'

export type GetApiV2StatusModelsArgs = {'Client-Agent'?: string | undefined, type?: string | undefined, min_count?: number | undefined, max_count?: number | undefined, model_state?: string | undefined, 'X-Fields'?: unknown | undefined};

export type GetApiV2StatusModelsOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const activeModel = z.object({name: z.string().optional(), count: z.number().int().optional(), performance: z.number().optional(), queued: z.number().optional(), jobs: z.number().optional(), eta: z.number().int().optional(), type: z.enum(["image", "text"]).optional()});

export const getApiV2StatusModelsResponse = z.array(activeModel);

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
};

/**
 * Returns a list of models active currently in this horde
 * 
 * GET /v2/status/models
 */
export const getApiV2StatusModels = async (args: GetApiV2StatusModelsArgs, options: GetApiV2StatusModelsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args['Client-Agent'] != null) headers.set("Client-Agent", String(args['Client-Agent']))
if (args.type != null) query.append("type", String(args.type))
if (args.min_count != null) query.append("min_count", String(args.min_count))
if (args.max_count != null) query.append("max_count", String(args.max_count))
if (args.model_state != null) query.append("model_state", String(args.model_state))
if (args['X-Fields'] != null) headers.set("X-Fields", String(args['X-Fields']))

const url = `${baseUrl.replace(/\/+$/, '')}/v2/status/models${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiV2StatusModelsResponse, await res.json())
};