import {z} from 'zod'

export type GetApiV1UsageOverviewArgs = {window?: ('7d' | '30d' | '90d') | undefined};

export type GetApiV1UsageOverviewOptions = {baseUrl?: string | undefined, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const usageOverviewPoint = z.object({day: z.string(), documents: z.number().int()});

export const usageOverviewResponse = z.object({active_jobs: z.number().int(), avg_processing_seconds: z.number().nullable(), avg_processing_seconds_prior: z.number().nullable(), documents_processed: z.number().int(), documents_processed_prior: z.number().int(), period_end: z.string(), period_start: z.string(), queued_jobs: z.number().int(), series: z.array(usageOverviewPoint), window: z.enum(["7d", "30d", "90d"])});

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_usage_overview
 * 
 * GET /v1/usage/overview
 */
export const getApiV1UsageOverview = async (args: GetApiV1UsageOverviewArgs, options?: GetApiV1UsageOverviewOptions) => {
const {baseUrl = "https://ndi-api.nace.ai", fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args.window != null) query.append("window", String(args.window))
if (APIKeyHeader !== undefined) headers.set("X-API-Key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/usage/overview${query.size > 0 ? `?${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(usageOverviewResponse, await res.json())
};