import {z} from 'zod'

export type GetApiPartnersReferrersUserIdStatsCompareArgs = {user_id: number, current_days?: number | undefined, previous_days?: number | undefined};

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

export const periodData = z.object({days: z.number().int(), start: z.string(), end: z.string(), referrals_count: z.number().int(), earnings_kopeks: z.number().int()});

export const changeData = z.object({absolute: z.number().int(), percent: z.number(), trend: z.string()});

export const appWebapiSchemasPartnersPeriodChange = z.object({referrals: changeData, earnings: changeData});

export const appWebapiSchemasPartnersPeriodComparisonResponse = z.object({current_period: periodData, previous_period: periodData, change: appWebapiSchemasPartnersPeriodChange, user_id: z.number().int().nullable().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
};

/**
 * Get Referrer Period Comparison
 * 
 * GET /partners/referrers/{user_id}/stats/compare
 */
export const getApiPartnersReferrersUserIdStatsCompare = async (args: GetApiPartnersReferrersUserIdStatsCompareArgs, options: GetApiPartnersReferrersUserIdStatsCompareOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args.current_days != null) query.append("current_days", String(args.current_days))
if (args.previous_days != null) query.append("previous_days", String(args.previous_days))
if (APIKeyHeader !== undefined) headers.set("X-API-Key", APIKeyHeader)

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