import {z} from 'zod'

export type GetApiRedisInsightsIdArgs = {id: string, period?: string | undefined, replica?: string | undefined, by?: 'region' | undefined};

export type GetApiRedisInsightsIdOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const insightGroup = z.object({key: z.string().optional(), label: z.string().optional(), kind: z.enum(["all", "region", "replica"]).optional()});

export const insightPoint = z.object({x: z.string().optional(), y: z.number().optional()});

export const insightAnomaly = z.object({start: z.string().optional(), end: z.string().optional(), peak: z.string().optional(), peak_value: z.number().optional(), baseline: z.number().optional(), change: z.number().optional()});

export const databaseInsights = z.object({groups: z.array(insightGroup).optional(), metrics: z.record(z.string(), z.record(z.string(), z.array(insightPoint))).optional(), comparison_window: z.string().optional(), comparison: z.record(z.string(), z.record(z.string(), z.object({current: z.number().optional(), previous: z.number().optional()}))).optional(), counters: z.record(z.string(), z.object({total: z.number().optional(), last_at: z.string().optional(), series: z.array(insightPoint).optional()})).optional(), anomalies: z.record(z.string(), z.array(insightAnomaly)).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 Database Insights
 * 
 * GET /redis/insights/{id}
 */
export const getApiRedisInsightsId = async (args: GetApiRedisInsightsIdArgs, options?: GetApiRedisInsightsIdOptions) => {
const {baseUrl = "https://api.upstash.com/v2", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.period != null) query.append("period", String(args.period))
if (args.replica != null) query.append("replica", String(args.replica))
if (args.by != null) query.append("by", String(args.by))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/redis/insights/${encodeURIComponent(String(args.id))}${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(databaseInsights, await res.json())
};