import { computeDateRange } from './dateRange.uts'
import { rpcOrEmptyArray, rpcOrNull } from './rpc.uts'

export type CouponAnalysisData = {
  overviewRow: UTSJSONObject | null
  typeList: Array<UTSJSONObject>
  channelList: Array<UTSJSONObject>
  trendList: Array<UTSJSONObject>
  conversionList: Array<UTSJSONObject>
}

export async function fetchCouponAnalysis(period: string): Promise<CouponAnalysisData> {
  const { startIso, endIso } = computeDateRange(period)

  const overviewRow = await rpcOrNull('rpc_coupon_effectiveness_overview', {
    p_start: startIso,
    p_end: endIso
  } as UTSJSONObject)

  const typeList = await rpcOrEmptyArray('rpc_coupon_type_stats', {
    p_start: startIso,
    p_end: endIso
  } as UTSJSONObject)

  const channelList = await rpcOrEmptyArray('rpc_coupon_channel_stats', {
    p_start: startIso,
    p_end: endIso
  } as UTSJSONObject)

  const trendList = await rpcOrEmptyArray('rpc_coupon_trend_daily', {
    p_start: startIso,
    p_end: endIso
  } as UTSJSONObject)

  const conversionList = await rpcOrEmptyArray('rpc_coupon_conversion_effect', {
    p_start: startIso,
    p_end: endIso
  } as UTSJSONObject)

  return { overviewRow, typeList, channelList, trendList, conversionList }
}