import {z} from 'zod'

export type GetApiV1TrainingJobsJobIdCheckpointsArgs = {job_id: string};

export type GetApiV1TrainingJobsJobIdCheckpointsOptions = {baseUrl: string, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const checkpointResponse = z.object({id: z.string(), job_id: z.string(), epoch: z.number().int(), step: z.number().int().nullable().optional(), training_loss: z.number().nullable().optional(), validation_loss: z.number().nullable().optional(), accuracy: z.number().nullable().optional(), learning_rate: z.number().nullable().optional(), gpu_memory_used: z.number().int().nullable().optional(), gpu_memory_total: z.number().int().nullable().optional(), checkpoint_path: z.string().nullable().optional(), is_deployable: z.boolean().optional(), is_best: z.boolean().optional(), is_final: z.boolean().optional(), created_at: z.string(), updated_at: z.string()});

export const checkpointListResponse = z.object({success: z.boolean(), checkpoints: z.array(checkpointResponse), count: z.number().int()});

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
};

/**
 * List Training Job Checkpoints
 * 
 * GET /v1/training-jobs/{job_id}/checkpoints
 * 
 * Also accepts auth: BearerAuth
 */
export const getApiV1TrainingJobsJobIdCheckpoints = async (args: GetApiV1TrainingJobsJobIdCheckpointsArgs, options: GetApiV1TrainingJobsJobIdCheckpointsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set("X-API-Key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/training-jobs/${encodeURIComponent(String(args.job_id))}/checkpoints${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(checkpointListResponse, await res.json())
};