import {z} from 'zod'

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

export const getApiSystemResponse = z.object({ApiVersion: z.number().optional(), Capabilities: z.object({}).optional(), CheckRevisions: z.boolean().optional(), DatabaseBackendPlugin: z.string().optional(), DatabaseServerIdentifier: z.string().optional(), DatabaseVersion: z.number().optional(), DicomAet: z.string().optional(), DicomDefaultRetrieveMethod: z.string().optional(), DicomPort: z.number().optional(), HasLabels: z.boolean().optional(), HttpPort: z.number().optional(), IngestTranscoding: z.string().optional(), IsHttpServerSecure: z.boolean().optional(), MainDicomTags: z.object({}).optional(), MaximumPatientCount: z.number().optional(), MaximumStorageMode: z.string().optional(), MaximumStorageSize: z.number().optional(), Name: z.string().optional(), OverwriteInstances: z.boolean().optional(), OverwriteInstancesMode: z.string().optional(), PatientLevelEnabled: z.boolean().optional(), Performance: z.object({}).optional(), PluginsEnabled: z.boolean().optional(), ReadOnly: z.boolean().optional(), StorageAreaPlugin: z.string().optional(), StorageCompression: z.boolean().optional(), StoreMD5ForAttachments: z.boolean().optional(), ThirdPartyPatches: z.array(z.string()).optional(), ThirdPartyVersions: z.object({}).optional(), UserMetadata: z.object({}).optional(), Version: 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
};

/**
 * Get system information
 * 
 * GET /system
 */
export const getApiSystem = async (options?: GetApiSystemOptions) => {
const {baseUrl = "https://orthanc.uclouvain.be/demo", fetch: fetchFn = fetch} = options ?? {}

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

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