import {z} from 'zod'

export type CreateLoopsSamplerRequestV1 = {session_id: string, base_model?: (string | null) | undefined, run_id?: (string | null) | undefined, max_seq_length?: (number | null) | undefined, model_path?: (string | null) | undefined, reuse_from_session_id?: (string | null) | undefined};

export type CreateApiV1LoopsSamplersArgs = {body: CreateLoopsSamplerRequestV1};

export type CreateApiV1LoopsSamplersOptions = {baseUrl: string, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const deploymentStatusV1 = z.enum(["BUILDING", "DEPLOYING", "DEPLOY_FAILED", "LOADING_MODEL", "ACTIVE", "UNHEALTHY", "BUILD_FAILED", "BUILD_STOPPED", "DEACTIVATING", "INACTIVE", "FAILED", "UPDATING", "SCALED_TO_ZERO", "WAKING_UP"]);

export const loopsSamplerStatusV1 = z.object({name: deploymentStatusV1});

export const loopsSamplerV1 = z.object({id: z.string(), base_url: z.string(), base_model: z.string(), created_at: z.string(), model_id: z.string(), deployment_id: z.string(), status: loopsSamplerStatusV1});

export const createLoopsSamplerResponseV1 = z.object({sampler: loopsSamplerV1});

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
};

/**
 * Creates a Loops sampler
 * 
 * POST /v1/loops/samplers
 */
export const createApiV1LoopsSamplers = async (args: CreateApiV1LoopsSamplersArgs, options: CreateApiV1LoopsSamplersOptions) => {
const {baseUrl, fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/loops/samplers${query.size > 0 ? `?${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(createLoopsSamplerResponseV1, await res.json())
};