import {z} from 'zod'

export type GetApiPartnersReferrersUserIdStatsArgs = {user_id: number};

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

export const referrerSummary = z.object({total_referrals: z.number().int(), paid_referrals: z.number().int(), active_referrals: z.number().int(), conversion_to_paid_percent: z.number(), conversion_to_active_percent: z.number(), avg_earnings_per_referral_kopeks: z.number()});

export const earningsByPeriod = z.object({all_time_kopeks: z.number().int(), year_kopeks: z.number().int(), month_kopeks: z.number().int(), week_kopeks: z.number().int(), today_kopeks: z.number().int()});

export const referralsCountByPeriod = z.object({all_time: z.number().int(), year: z.number().int(), month: z.number().int(), week: z.number().int(), today: z.number().int()});

export const referrerDetailedStats = z.object({user_id: z.number().int(), summary: referrerSummary, earnings: earningsByPeriod, referrals_count: referralsCountByPeriod});

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 Referrer Detailed Stats
 * 
 * GET /partners/referrers/{user_id}/stats
 */
export const getApiPartnersReferrersUserIdStats = async (args: GetApiPartnersReferrersUserIdStatsArgs, options: GetApiPartnersReferrersUserIdStatsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (APIKeyHeader !== undefined) headers.set("X-API-Key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/partners/referrers/${encodeURIComponent(String(args.user_id))}/stats${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(referrerDetailedStats, await res.json())
};