import {z} from 'zod'

export type GetApiV1StatsSummaryArgs = {startDate?: number | undefined, endDate?: number | undefined, interval?: ('day' | 'week' | 'month') | undefined, currency: 'EUR' | 'USD'};

export type GetApiV1StatsSummaryOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const statsMetricTotalsEntity = z.object({totalProducts: z.number(), totalSubscriptions: z.number(), totalCustomers: z.number(), totalPayments: z.number(), activeSubscriptions: z.number(), totalRevenue: z.number(), totalNetRevenue: z.number(), netMonthlyRecurringRevenue: z.number(), monthlyRecurringRevenue: z.number()});

export const statsMetricPeriodEntity = z.object({timestamp: z.number(), grossRevenue: z.number(), netRevenue: z.number()});

export const statsSummaryEntity = z.object({totals: statsMetricTotalsEntity, periods: z.array(statsMetricPeriodEntity).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 store metrics summary
 * 
 * GET /v1/stats/summary
 */
export const getApiV1StatsSummary = async (args: GetApiV1StatsSummaryArgs, options?: GetApiV1StatsSummaryOptions) => {
const {baseUrl = "https://api.creem.io", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (args.startDate != null) query.append("startDate", String(args.startDate))
if (args.endDate != null) query.append("endDate", String(args.endDate))
if (args.interval != null) query.append("interval", String(args.interval))
if (args.currency != null) query.append("currency", String(args.currency))
if (ApiKey !== undefined) headers.set("x-api-key", ApiKey)

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