import {z} from 'zod'

export type GetApiApiV2ReservationUnitsArgs = {regionID?: Array<string> | undefined, accelerator?: Array<string> | undefined, unit?: Array<string> | undefined};

export type GetApiApiV2ReservationUnitsOptions = {baseUrl: string, oauth2Authentication?: string | undefined, fetch?: typeof fetch | undefined};

export const gpuVendorV2 = z.enum(["UNKNOWN", "NVIDIA", "AMD"]);

export const reservationUnitGpuV2 = z.object({vendor: gpuVendorV2, model: z.string(), physicalCount: z.number().int().gte(0), logicalCount: z.number().int().gte(0), memory: z.number().int().gte(0)});

export const reservationUnitHostV2 = z.object({cpus: z.number().int().gte(0), memory: z.number().int().gte(0), disk: z.number().int().gte(0), gpu: reservationUnitGpuV2});

export const reservationUnitV2 = z.object({regionId: z.string(), accelerator: z.string(), unit: z.string(), machineFlavorId: z.string(), deviceTypeResourceClass: z.string(), hostsPerUnit: z.number().int().gte(1), cpusPerUnit: z.number().int().gte(0), gpusPerUnit: z.number().int().gte(0), gpuMemoryPerUnit: z.number().int().gte(0), memoryPerUnit: z.number().int().gte(0), host: reservationUnitHostV2, availableUnitCount: z.number().int().gte(0), largestContiguousUnitCount: z.number().int().gte(0), totalCount: z.number().int().gte(0)});

export const reservationUnitsV2 = z.array(reservationUnitV2);

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 reservation units
 * 
 * GET /api/v2/reservation-units
 */
export const getApiApiV2ReservationUnits = async (args: GetApiApiV2ReservationUnitsArgs, options: GetApiApiV2ReservationUnitsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, oauth2Authentication} = options ?? {}

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

for (const item of args.regionID ?? []) query.append("regionID", String(item))
for (const item of args.accelerator ?? []) query.append("accelerator", String(item))
for (const item of args.unit ?? []) query.append("unit", String(item))
if (oauth2Authentication !== undefined) headers.set('authorization', `Bearer ${oauth2Authentication}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/reservation-units${query.size > 0 ? `?${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(reservationUnitsV2, await res.json())
};