import {z} from 'zod'

export type CreateApiNotebooksArgs = {'X-CSRF-Protection': boolean, instance?: ('medium' | 'large' | 'mediumx2' | 'mediumx2-t4' | 'mediumx2-t4-light-pfp') | undefined, jupyterlab_version?: 'v4' | undefined, reset_target?: (Array<'.cache' | '.ipynb_checkpoints' | '.ipython' | '.jupyter' | '.local/share/jupyter' | '.local/share/jupyter/kernels' | '.py311' | '.py313' | '.local/share/matlantis/jobs' | '.local/share/matlantis/venvs' | '.local/share/Trash'>) | undefined};

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

export const createApiNotebooksResponse = z.object({data: z.object({failure_type: z.enum(["unknown", "not_found"]).optional(), force_stops_at: z.string().optional(), id: z.string(), image_version: z.string(), instance: z.enum(["medium", "large", "mediumx2", "mediumx2-t4", "mediumx2-t4-light-pfp"]), spec: z.object({cpu: z.number().int().gte(1), instance: z.enum(["medium", "large", "mediumx2", "mediumx2-t4", "mediumx2-t4-light-pfp"]), memory_limit_bytes: z.number().int().gte(1), required_resources: z.number().gte(0)}), started_at: z.string().optional(), status: z.enum(["initial", "starting", "waiting", "running", "stopping", "stopped", "failed"]), stopped_at: z.string().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
};

/**
 * Spawn new notebook server
 * 
 * POST /notebooks
 * 
 * Also accepts auth: cliOAuth
 */
export const createApiNotebooks = async (args: CreateApiNotebooksArgs, options: CreateApiNotebooksOptions) => {
const {baseUrl, fetch: fetchFn = fetch, backendAuth} = options ?? {}

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

if (args['X-CSRF-Protection'] != null) headers.set("X-CSRF-Protection", String(args['X-CSRF-Protection']))
if (args.instance != null) query.append("instance", String(args.instance))
if (args.jupyterlab_version != null) query.append("jupyterlab_version", String(args.jupyterlab_version))
for (const item of args.reset_target ?? []) query.append("reset_target", String(item))
if (backendAuth !== undefined) cookies.push("mtls-prd=" + encodeURIComponent(backendAuth))

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

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

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

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