import {z} from 'zod'

export type DatabaseId = string;

export type GetApiV2DatabasesDbIdStatisticsArgs = {from: string, to: string, db_id: DatabaseId};

export type GetApiV2DatabasesDbIdStatisticsOptions = {baseUrl?: string | undefined, Bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const chartUnit = z.enum(["NoUnit", "milliseconds", "megabyte"]);

export const datapoint = z.array(z.unknown());

export const singleRegionChart = z.object({unit: chartUnit, data: z.array(datapoint), diff: z.number().gte(-1).lte(1).nullable().optional()});

export const latencyChartData = z.object({data: z.array(datapoint), diff: z.number().gte(-1).lte(1).nullable().optional()});

export const latencySingleRegionChart = z.object({unit: chartUnit, data: z.record(z.string(), latencyChartData)});

export const statsDatabaseV2Response = z.object({row_read_count: singleRegionChart, row_write_count: singleRegionChart, delegated_write_requests: singleRegionChart, storage: singleRegionChart, latency: latencySingleRegionChart, query_count: singleRegionChart});

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
};

/**
 * Statistics
 * 
 * GET /v2/databases/{db_id}/statistics
 * 
 * Also accepts auth: AccessKey
 */
export const getApiV2DatabasesDbIdStatistics = async (args: GetApiV2DatabasesDbIdStatisticsArgs, options?: GetApiV2DatabasesDbIdStatisticsOptions) => {
const {baseUrl = "https://api.bunny.net/database", fetch: fetchFn = fetch, Bearer} = options ?? {}

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

if (args.from != null) query.append("from", String(args.from))
if (args.to != null) query.append("to", String(args.to))
if (Bearer !== undefined) headers.set("Authorization", Bearer)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/databases/${encodeURIComponent(String(args.db_id))}/statistics${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(statsDatabaseV2Response, await res.json())
};