import {z} from 'zod'

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

export const hardwareUsage = z.object({cpu: z.number().int().gte(0), payload_io_read: z.number().int().gte(0), payload_io_write: z.number().int().gte(0), payload_index_io_read: z.number().int().gte(0), payload_index_io_write: z.number().int().gte(0), vector_io_read: z.number().int().gte(0), vector_io_write: z.number().int().gte(0)});

export const modelUsage = z.object({tokens: z.number().int().gte(0)});

export const inferenceUsage = z.object({models: z.record(z.string(), modelUsage)});

export const usage = z.object({hardware: z.union([hardwareUsage, z.unknown()]).optional(), inference: z.union([inferenceUsage, z.unknown()]).optional()});

export const quotaConfig = z.object({enabled: z.boolean().optional(), max_resident_memory_percent: z.number().int().gte(1).lte(100).nullable().optional(), max_disk_usage_percent: z.number().int().gte(1).lte(100).nullable().optional(), release_margin_percent: z.number().int().gte(0).lte(100).nullable().optional()});

export const quotaUsage = z.object({resident_memory_percent: z.number().int().gte(0).nullable().optional(), disk_usage_percent: z.number().int().gte(0).nullable().optional()});

export const peerQuotaUsage = z.object({exceeded: z.boolean(), resident_memory_percent: z.number().int().gte(0).nullable().optional(), disk_usage_percent: z.number().int().gte(0).nullable().optional()});

export const quotaStatus = z.object({config: quotaConfig, usage: quotaUsage, peers: z.record(z.string(), peerQuotaUsage).nullable().optional()});

export const getApiQuotasResponse = z.object({usage: z.union([usage, z.unknown()]).optional(), time: z.number().optional(), status: z.string().optional(), result: quotaStatus.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 global quotas
 * 
 * GET /quotas
 * 
 * Also accepts auth: bearerAuth
 */
export const getApiQuotas = async (options?: GetApiQuotasOptions) => {
const {baseUrl = "http://localhost:6333", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (apiKey !== undefined) headers.set("api-key", apiKey)

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