import {z} from 'zod'

export type MetricsAggregationMethods = 'AVG' | 'COUNT' | 'MIN' | 'MAX' | 'SUM' | 'LAST';

export type MetricsMetricSeriesType = 'TIMESERIES' | 'SCALAR';

export type MetricsMeasurementsFillingMethod = 'NONE' | 'ZERO_FILL' | 'NULL_FILL' | 'LAST_VALUE_FILL';

export type MetricsMeasurementsRequest = {id?: string | undefined, name: string, filter?: string | undefined, groupBy?: Array<string> | undefined, aggregateBy?: MetricsAggregationMethods | undefined, preGroupBy?: Array<string> | undefined, preGroupByMethod?: MetricsAggregationMethods | undefined, seriesType?: MetricsMetricSeriesType | undefined, fillMethod?: MetricsMeasurementsFillingMethod | undefined, fillIfEmpty?: boolean | undefined};

export type CreateApiV1MetricsMeasurementsArgs = {forcePositional?: boolean | undefined, pageSize?: number | undefined, skipToken?: string | undefined, body: {metrics: Array<MetricsMeasurementsRequest>, startTime?: string | undefined, endTime?: string | undefined}};

export type CreateApiV1MetricsMeasurementsOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const commonKeyValuePair = z.object({key: z.string(), value: z.string()});

export const metricsMeasurement = z.object({time: z.string(), value: z.number().nullable()});

export const metricsGrouping = z.object({attributes: z.array(commonKeyValuePair), measurements: z.array(metricsMeasurement)});

export const commonPageInfo = z.object({prevPage: z.string(), nextPage: z.string()});

export const createApiV1MetricsMeasurementsResponse = z.object({metrics: z.array(z.object({id: z.string().optional(), name: z.string(), groupings: z.array(metricsGrouping), bucketSizeInSeconds: z.number().int()})), pageInfo: commonPageInfo});

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 measurements for a batch of metrics
 * 
 * POST /v1/metrics/measurements
 */
export const createApiV1MetricsMeasurements = async (args: CreateApiV1MetricsMeasurementsArgs, options?: CreateApiV1MetricsMeasurementsOptions) => {
const {baseUrl = "https://api.na-01.cloud.solarwinds.com", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.forcePositional != null) query.append("forcePositional", String(args.forcePositional))
if (args.pageSize != null) query.append("pageSize", String(args.pageSize))
if (args.skipToken != null) query.append("skipToken", String(args.skipToken))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/metrics/measurements${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiV1MetricsMeasurementsResponse, await res.json())
};