import {z} from 'zod'

export type BenefitChargeStatus = 'PENDING' | 'PAID' | 'OVERDUE' | 'CANCELLED' | 'REFUNDED';

export type GetApiBenefitsBenefitIdChargesArgs = {benefitId: string, providerServiceCode?: string | undefined, status?: BenefitChargeStatus | undefined, billingPeriodFrom?: string | undefined, billingPeriodTo?: string | undefined, page?: number | undefined, pageSize?: number | undefined};

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

export const money = z.number();

export const benefitChargeStatus = z.enum(["PENDING", "PAID", "OVERDUE", "CANCELLED", "REFUNDED"]);

export const benefitCharge = z.object({id: z.string(), employeeId: z.number().int(), subscriptionId: z.string(), providerServiceCode: z.string(), billingPeriodStart: z.string(), billingPeriodEnd: z.string(), amount: money, status: benefitChargeStatus});

export const getApiBenefitsBenefitIdChargesResponse = z.array(benefitCharge);

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
};

/**
 * List all benefit charges for a specific subscription
 * 
 * GET /benefits/{benefitId}/charges
 */
export const getApiBenefitsBenefitIdCharges = async (args: GetApiBenefitsBenefitIdChargesArgs, options?: GetApiBenefitsBenefitIdChargesOptions) => {
const {baseUrl = "http://localhost:3000", fetch: fetchFn = fetch} = options ?? {}

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

if (args.providerServiceCode != null) query.append("providerServiceCode", String(args.providerServiceCode))
if (args.status != null) query.append("status", String(args.status))
if (args.billingPeriodFrom != null) query.append("billingPeriodFrom", String(args.billingPeriodFrom))
if (args.billingPeriodTo != null) query.append("billingPeriodTo", String(args.billingPeriodTo))
if (args.page != null) query.append("page", String(args.page))
if (args.pageSize != null) query.append("pageSize", String(args.pageSize))

const url = `${baseUrl.replace(/\/+$/, '')}/benefits/${encodeURIComponent(String(args.benefitId))}/charges${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(getApiBenefitsBenefitIdChargesResponse, await res.json())
};