import {z} from 'zod'

export type GetApiV3MetricsSendTimeseriesArgs = {start?: string | undefined, end?: string | undefined, sending_domain?: string | undefined, granularity?: ('auto' | 'day' | 'week' | 'month') | undefined};

export type GetApiV3MetricsSendTimeseriesOptions = {baseUrl?: string | undefined, NYLASAPIKEY?: string | undefined, fetch?: typeof fetch | undefined};

export const sendTimeseries = z.object({granularity: z.enum(["day", "week", "month"]).optional(), buckets: z.array(z.object({start: z.string().optional(), end: z.string().optional(), sent: z.number().int().optional(), delivered: z.number().int().optional(), bounced_hard: z.number().int().optional(), bounced_soft: z.number().int().optional(), bounced_undetermined: z.number().int().optional(), rejected: z.number().int().optional(), complaints: z.number().int().optional(), bounce_rate: z.number().nullable().optional(), complaint_rate: z.number().nullable().optional()})).optional()});

export const getApiV3MetricsSendTimeseriesResponse = z.object({request_id: z.string().optional(), data: sendTimeseries.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
};

/**
 * Return send metrics over time
 * 
 * GET /v3/metrics/send/timeseries
 */
export const getApiV3MetricsSendTimeseries = async (args: GetApiV3MetricsSendTimeseriesArgs, options?: GetApiV3MetricsSendTimeseriesOptions) => {
const {baseUrl = "https://api.us.nylas.com", fetch: fetchFn = fetch, NYLASAPIKEY} = options ?? {}

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

if (args.start != null) query.append("start", String(args.start))
if (args.end != null) query.append("end", String(args.end))
if (args.sending_domain != null) query.append("sending_domain", String(args.sending_domain))
if (args.granularity != null) query.append("granularity", String(args.granularity))
if (NYLASAPIKEY !== undefined) headers.set('authorization', `Bearer ${NYLASAPIKEY}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v3/metrics/send/timeseries${query.size > 0 ? `?${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(getApiV3MetricsSendTimeseriesResponse, await res.json())
};