import {z} from 'zod'

export type GetApiApiV1CachesStatsOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const errorEntity = z.object({errorCode: z.string().optional(), message: z.string().optional(), fieldName: z.string().optional()});

export const jvmMemoryView = z.object({maxMemory: z.number().int(), allocatedMemory: z.number().int(), usedMemory: z.number().int(), freeMemory: z.number().int()});

export const cacheProviderStatsView = z.object({providerName: z.string(), columns: z.array(z.string()), stats: z.array(z.record(z.string(), z.string()))});

export const cacheStatsView = z.object({clusterId: z.string(), serverId: z.string(), serverName: z.string(), memory: jvmMemoryView, providers: z.array(cacheProviderStatsView)});

export const messageEntity = z.object({message: z.string().optional()});

export const pagination = z.object({currentPage: z.number().int().optional(), perPage: z.number().int().optional(), totalEntries: z.number().int().optional()});

export const responseEntityCacheStatsView = z.object({errors: z.array(errorEntity).optional(), entity: cacheStatsView.optional(), messages: z.array(messageEntity).optional(), i18nMessagesMap: z.record(z.string(), z.string()).optional(), permissions: z.array(z.string()).optional(), pagination: pagination.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 cache statistics
 * 
 * GET /api/v1/caches/stats
 */
export const getApiApiV1CachesStats = async (options: GetApiApiV1CachesStatsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/caches/stats${query.size > 0 ? `?${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(responseEntityCacheStatsView, await res.json())
};