import {z} from 'zod'

export type CreateApiV1EventsAggregateArgs = {'x-api-version': string, body: {customer_id?: string | undefined, entity_id?: string | undefined, feature_id: string | Array<string>, group_by?: string | undefined, range?: ('24h' | '7d' | '30d' | '90d' | 'last_cycle' | '1bc' | '3bc') | undefined, bin_size?: ('day' | 'hour' | 'week' | 'month') | undefined, custom_range?: {start: number, end: number} | undefined, filter_by?: {[key: string]: string} | undefined, max_groups?: number | undefined}};

export type CreateApiV1EventsAggregateOptions = {baseUrl?: string | undefined, secretKey?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiV1EventsAggregateResponse = z.object({list: z.array(z.object({period: z.number(), values: z.record(z.string(), z.number()), grouped_values: z.record(z.string(), z.record(z.string(), z.number())).optional()})), total: z.record(z.string(), z.object({count: z.number(), sum: z.number()}))});

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
};

/**
 * Aggregate usage events by time period. Returns usage totals grouped by feature and optionally by a custom property.
 * 
 * POST /v1/events.aggregate
 */
export const createApiV1EventsAggregate = async (args: CreateApiV1EventsAggregateArgs, options?: CreateApiV1EventsAggregateOptions) => {
const {baseUrl = "https://api.useautumn.com", fetch: fetchFn = fetch, secretKey} = options ?? {}

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

if (args['x-api-version'] != null) headers.set("x-api-version", String(args['x-api-version']))
if (secretKey !== undefined) headers.set('authorization', `Bearer ${secretKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/events.aggregate${query.size > 0 ? `?${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(createApiV1EventsAggregateResponse, await res.json())
};