import {z} from 'zod'

export type IngestUsageEventApiRequestDto = {name: string, customer_id?: string | undefined, external_customer_id?: string | undefined, event_id?: string | undefined, timestamp?: string | undefined, properties?: {[key: string]: unknown} | undefined};

export type IngestUsageEventsApiRequestDto = {events: Array<IngestUsageEventApiRequestDto>};

export type CreateApiV1EventsIngestArgs = {body: IngestUsageEventsApiRequestDto};

export type CreateApiV1EventsIngestOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const ingestUsageEventWarningApiDto = z.object({index: z.number(), code: z.enum(["no_matching_meter", "meter_archived", "timestamp_outside_late_window"]), message: z.string()});

export const ingestUsageEventsApiResponseDto = z.object({accepted: z.number(), event_ids: z.array(z.string()), warnings: z.array(ingestUsageEventWarningApiDto).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
};

/**
 * Ingest usage events
 * 
 * POST /v1/events/ingest
 */
export const createApiV1EventsIngest = async (args: CreateApiV1EventsIngestArgs, options?: CreateApiV1EventsIngestOptions) => {
const {baseUrl = "https://api.creem.io", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (ApiKey !== undefined) headers.set("x-api-key", ApiKey)

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